阅读说明：本技术 液力变矩器监测方法、设备及液力变矩器监测芯片 (Hydraulic torque converter monitoring method and device and hydraulic torque converter monitoring chip ) 是由 蒋昌恺 谢涛 于 2020-05-09 设计创作，主要内容包括：本申请实施例提供一种液力变矩器监测方法、设备及液力变矩器监测芯片,包括：获取液力变矩器的涡轮转速与泵轮转速；根据涡轮转速以及泵轮转速获取液力变矩器的液力传扭扭矩；获取液力变矩器锁止装置的锁止传递扭矩以及驾驶员需求传扭扭矩；获取锁止传递扭矩与液力传扭扭矩的扭矩和,并获取扭矩和与驾驶员需求传扭扭矩之间的第一扭矩差；当第一扭矩差大于或等于第一扭矩差阈值时生成第一非预期加速信息,第一非预期加速信息用于指示液力变矩器锁止装置锁止时车辆的加速度大于或等于第一预设加速度阈值。上述方案可以确定车辆是否会产生较大的加速度,避免用户在无预警的情况下遭受非预期加速,改善了用户体验。(The embodiment of the application provides a method and equipment for monitoring a hydraulic torque converter and a hydraulic torque converter monitoring chip, and the method comprises the following steps: acquiring the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter; acquiring hydraulic torque transmission torque of the hydraulic torque converter according to the rotating speed of the turbine and the rotating speed of the pump impeller; acquiring a locking transmission torque of a hydraulic torque converter locking device and a torque transmission torque required by a driver; acquiring a torque sum of a locking transmission torque and a hydraulic transmission torque, and acquiring a first torque difference between the torque sum and a transmission torque required by a driver; first unintended acceleration information is generated when the first torque difference is greater than or equal to a first torque difference threshold, the first unintended acceleration information being used to indicate that the acceleration of the vehicle is greater than or equal to a first preset acceleration threshold when the torque converter locking device is locked. According to the scheme, whether the vehicle generates larger acceleration or not can be determined, the user is prevented from being subjected to unexpected acceleration under the condition of no early warning, and the user experience is improved.)

1. A torque converter monitoring method, comprising:

acquiring the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter;

acquiring hydraulic torque transmission torque of the hydraulic torque converter according to the rotating speed of the turbine and the rotating speed of the pump wheel;

acquiring a locking transmission torque of a hydraulic torque converter locking device and a torque transmission torque required by a driver;

acquiring a torque sum of the locking transmission torque and the hydraulic transmission torque, and acquiring a first torque difference between the torque sum and the driver required transmission torque;

when the first torque difference is greater than or equal to a first torque difference threshold value, first unexpected acceleration information is generated, and the first unexpected acceleration information is used for indicating that the acceleration of the vehicle is greater than or equal to a first preset acceleration threshold value when the hydraulic torque converter locking device is locked.

2. A torque converter monitoring method as recited in claim 1 further comprising:

the torque converter locking device is prohibited from performing a locking operation according to the first unexpected acceleration information.

3. The torque converter monitoring method according to claim 1, wherein obtaining a hydrodynamic torque transmission of the torque converter based on the turbine rotation speed and the pump rotation speed comprises:

inquiring in a capacity characteristic coefficient database according to the turbine rotating speed and the pump rotating speed so as to determine a capacity characteristic coefficient corresponding to the turbine rotating speed and the pump rotating speed;

inquiring in a torque ratio database according to the turbine rotating speed and the pump wheel rotating speed to determine a torque ratio of the hydraulic torque converter corresponding to the turbine rotating speed and the pump wheel rotating speed;

according to T _ pump ═ C _ TC ═ n _ pump²Acquiring the pump impeller torque T _ pump, wherein C _ TC is the capacity characteristic coefficient, and n _ pump is the pump impeller rotating speed;

and acquiring the hydraulic torque transmission torque T _ hydrar according to T _ hydrar ═ T _ pump ^ lambda, wherein T _ pump is the pump wheel torque, and lambda is the torque converter torque ratio.

4. A torque converter monitoring method as recited in claim 3 wherein said obtaining a torque converter lockup device lockup transfer torque and a driver demand transfer torque comprises:

acquiring the locking transmission torque and the current actual engine torque T _ eng;

and acquiring the driver required torque transmission torque T _ drvr according to the T _ drvr-T _ eng lambda.

5. A torque converter monitoring method according to claim 1, characterized in that said first preset acceleration threshold value is 0.2 g.

6. A torque converter monitoring method according to any one of claims 1-5, characterized in that the method further comprises:

acquiring a capacity characteristic coefficient corresponding to the turbine rotating speed and the pump impeller rotating speed, and acquiring the torque of the pump impeller output end of the hydraulic torque converter after a locking device of the hydraulic torque converter is released according to the pump impeller rotating speed and the capacity characteristic coefficient;

acquiring current vehicle accelerator working parameters, current vehicle engine rotating speed and engine torque characteristic parameters;

acquiring the torque of the input end of the pump impeller after the locking device of the hydraulic torque converter is released in the current state according to the current working parameters of the throttle of the vehicle, the current rotating speed of the engine of the vehicle and the characteristic parameters of the torque of the engine;

when the torque at the output end of the pump wheel is equal to the torque at the input end of the pump wheel, acquiring the turbine steady-state output torque of the hydraulic torque converter after the locking device of the hydraulic torque converter is released in the current state according to the current working parameters of the accelerator of the vehicle and the current rotating speed of the engine of the vehicle;

acquiring a locking output torque of the hydraulic torque converter when a locking device of the hydraulic torque converter is released, and acquiring a second torque difference between the locking output torque and the steady-state output torque of the turbine;

and generating second unexpected acceleration information when the second torque difference is greater than or equal to a second torque difference threshold, wherein the second unexpected acceleration information is used for indicating that the acceleration of the vehicle is greater than or equal to a second preset acceleration threshold when the hydraulic torque converter locking device is released.

7. The torque converter monitoring method of claim 6, further comprising:

the torque converter locking device is prohibited from performing a releasing operation according to the second unexpected acceleration information.

8. The torque converter monitoring method according to claim 6, wherein the obtaining of the turbine steady-state output torque of the torque converter after the torque converter locking device is released in the current state according to the current vehicle throttle operating parameter and the current vehicle engine speed when the pump output torque and the pump input torque are equal comprises:

when the torque of the output end of the pump wheel is equal to the torque of the input end of the pump wheel, acquiring the stable rotating speed of the pump wheel according to the current working parameters of the accelerator of the vehicle and the current rotating speed of the engine of the vehicle;

according to T _ pump _ stable, C _ TC n _ pump _ stable²Acquiring steady-state output torque T _ pump _ stable of a pump wheel, wherein n _ pump _ stable is the steady rotating speed of the pump wheel;

acquiring a torque ratio lambda _ stable of the hydraulic torque converter according to the rotating speed of the turbine and the stable rotating speed of the pump wheel;

and acquiring the turbine steady-state output torque T _ release according to T _ release, T _ pump _ stable and lambda _ stable.

9. A torque converter monitoring method according to claim 6, characterized in that said second preset acceleration threshold value is 0.2 g.

10. A torque converter testing apparatus, comprising: the device comprises a rotating speed acquisition module, a first transmission torque acquisition module, a second transmission torque acquisition module, a first torque difference acquisition module and an acceleration detection module;

the rotating speed acquisition module is used for acquiring the rotating speed of a turbine and the rotating speed of a pump impeller of the hydraulic torque converter;

the first torque transmission torque acquisition module is used for acquiring hydraulic torque transmission torque of the hydraulic torque converter according to the rotating speed of the turbine and the rotating speed of the pump impeller;

the second transmission torque acquisition module is used for acquiring the locking transmission torque of the hydraulic torque converter locking device and the transmission torque required by the driver;

the first torque difference acquisition module is used for acquiring the torque sum of the locking transmission torque and the hydraulic transmission torque and acquiring a first torque difference between the torque sum and the driver required transmission torque;

an acceleration detection module to generate first unintended acceleration information when the first torque difference is greater than or equal to a first torque difference threshold, the first unintended acceleration information indicating that an acceleration of the vehicle is greater than or equal to a first preset acceleration threshold when the torque converter locking device is locked.

11. The detection chip for the hydraulic torque converter is characterized in that the detection chip for the hydraulic torque converter calls a stored program to realize the following method:

acquiring the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter;

acquiring hydraulic torque transmission torque of the hydraulic torque converter according to the rotating speed of the turbine and the rotating speed of the pump wheel;

acquiring a locking transmission torque of a hydraulic torque converter locking device and a torque transmission torque required by a driver;

acquiring a torque sum of the locking transmission torque and the hydraulic transmission torque, and acquiring a first torque difference between the torque sum and the driver required transmission torque;

first unintended acceleration information is generated when the first torque difference is greater than or equal to a first torque difference threshold, the first unintended acceleration information indicating that an acceleration of the vehicle is greater than or equal to a first preset acceleration threshold when the torque converter locking device is locked.

Technical Field

The embodiment of the application relates to the technical field of automobiles, in particular to a method and equipment for monitoring a hydraulic torque converter and a hydraulic torque converter monitoring chip.

Background

An Automatic Transmission (AT) is an automotive Transmission that can automatically change a gear ratio according to an accelerator during driving of a vehicle, and is generally connected to an automotive engine through a Torque Converter (TC). A torque converter generally consists of a pump impeller, a turbine runner, and a lockup device. The engine drives the pump impeller to rotate, and the pump impeller drives the turbine to rotate by stirring hydraulic oil in the hydraulic torque converter; in the locking state, the torque converter locks the pump impeller and the turbine wheel through the locking device, namely the pump impeller and the turbine wheel are connected, so that the pump impeller can directly transmit power to the turbine wheel.

When the locking device of the torque converter performs the releasing action, the torque converter is quickly changed from complete mechanical torque transmission to complete hydraulic torque transmission, and at the moment, the vehicle may generate large acceleration, and if whether the vehicle generates large acceleration cannot be determined, the user may be subjected to unexpected acceleration, and the user experience is damaged.

Disclosure of Invention

In view of this, embodiments of the present invention provide a method and an apparatus for monitoring a torque converter, and a torque converter monitoring chip, so as to overcome a defect in the prior art that it is not possible to determine whether a vehicle generates a large acceleration.

The embodiment of the application provides a method for monitoring a hydraulic torque converter, which comprises the following steps:

acquiring the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter;

acquiring hydraulic torque transmission torque of the hydraulic torque converter according to the rotating speed of the turbine and the rotating speed of the pump impeller;

acquiring a locking transmission torque of a hydraulic torque converter locking device and a torque transmission torque required by a driver;

acquiring a torque sum of a locking transmission torque and a hydraulic transmission torque, and acquiring a first torque difference between the torque sum and a transmission torque required by a driver;

first unintended acceleration information is generated when the first torque difference is greater than or equal to a first torque difference threshold, the first unintended acceleration information being used to indicate that the acceleration of the vehicle is greater than or equal to a first preset acceleration threshold when the torque converter locking device is locked.

Optionally, in an embodiment of the present application, the method further includes:

the torque converter locking device is inhibited from performing the releasing operation when the first torque difference is greater than or equal to a first torque difference threshold.

Optionally, in an embodiment of the present application, obtaining the hydrodynamic torque transmission torque of the hydrodynamic torque converter according to the turbine rotation speed and the pump rotation speed includes:

inquiring in a capacity characteristic coefficient database according to the turbine rotating speed and the pump rotating speed so as to determine a capacity characteristic coefficient corresponding to the turbine rotating speed and the pump rotating speed;

inquiring in a torque ratio database according to the rotating speed of the turbine and the rotating speed of the pump impeller to determine the torque ratio of the hydraulic torque converter corresponding to the rotating speed of the turbine and the rotating speed of the pump impeller;

according to T _ pump ═ C _ TC ═ n _ pump²Acquiring pump wheel torque T _ pump, wherein C _ TC is a capacity characteristic coefficient, and n _ pump is pump wheel rotating speed;

and acquiring hydraulic torque transmission torque T _ hydrar according to T _ hydrar, wherein T _ pump is pump wheel torque, and lambda is torque converter torque ratio.

Optionally, in an embodiment of the present application, obtaining the lock-up transmission torque of the torque converter lock-up device and the driver demand transmission torque includes:

acquiring a locking transmission torque and a current actual engine torque T _ eng;

and acquiring the driver required torque transmission torque T _ drvr according to the T _ drvr-T _ eng lambda.

A torque converter monitoring method according to claim 1, characterized in that the first predetermined acceleration threshold value is 0.2 g.

Optionally, in an embodiment of the present application, the method further includes:

acquiring a capacity characteristic coefficient corresponding to the rotation speed of the turbine and the rotation speed of the pump wheel, and acquiring the torque of the output end of the pump wheel of the hydraulic torque converter after the locking device of the hydraulic torque converter is released according to the rotation speed of the pump wheel and the capacity characteristic coefficient;

acquiring current vehicle accelerator working parameters, current vehicle engine rotating speed and engine torque characteristic parameters;

acquiring the torque of the input end of the pump impeller after the locking device of the hydraulic torque converter is released in the current state according to the current working parameters of the throttle of the vehicle, the current rotating speed of the engine of the vehicle and the characteristic parameters of the torque of the engine;

when the torque at the output end of the pump wheel is equal to the torque at the input end of the pump wheel, acquiring the turbine steady-state output torque of the hydraulic torque converter after the locking device of the hydraulic torque converter is released in the current state according to the current working parameters of the accelerator of the vehicle and the current rotating speed of the engine of the vehicle;

acquiring a locking output torque of the hydraulic torque converter when the locking device of the hydraulic torque converter is released, and acquiring a second torque difference between the locking output torque and the steady-state output torque of the turbine;

and generating second unexpected acceleration information when the second torque difference is greater than or equal to a second torque difference threshold, the second unexpected acceleration information being used for indicating that the acceleration of the vehicle is greater than or equal to a second preset acceleration threshold when the torque converter locking device is released.

Optionally, in an embodiment of the present application, the method further includes:

the torque converter locking device is prohibited from performing the releasing operation based on the second unexpected acceleration information.

Optionally, in an embodiment of the present application, when the torque at the output end of the pump impeller is equal to the torque at the input end of the pump impeller, obtaining the turbine steady-state output torque of the torque converter after the torque converter locking device is released in the current state according to the current vehicle accelerator operating parameter and the current vehicle engine speed, including:

when the torque of the output end of the pump wheel is equal to the torque of the input end of the pump wheel, obtaining the stable rotating speed of the pump wheel according to the current working parameters of the accelerator of the vehicle and the current rotating speed of the engine of the vehicle;

according to T _ pump _ stable, C _ TC n _ pump _ stable²Acquiring steady-state output torque T _ pump _ stable of the pump wheel, wherein n _ pump _ stable is the steady rotating speed of the pump wheel;

acquiring a torque ratio lambda _ stable of the hydraulic torque converter according to the rotating speed of the turbine and the stable rotating speed of the pump wheel;

and acquiring the turbine steady-state output torque T _ release according to the T _ release, namely T _ pump _ stable and lambda _ stable.

Optionally, in an embodiment of the present application, the second preset acceleration threshold is 0.2 g.

The embodiment of the application provides a torque converter check out test set, includes: the device comprises a rotating speed acquisition module, a first transmission torque acquisition module, a second transmission torque acquisition module, a first torque difference acquisition module and an acceleration detection module;

the rotating speed acquisition module is used for acquiring the rotating speed of a turbine and the rotating speed of a pump impeller of the hydraulic torque converter;

the first torque transmission torque acquisition module is used for acquiring hydraulic torque transmission torque of the hydraulic torque converter according to the rotating speed of the turbine and the rotating speed of the pump impeller;

the second transmission torque acquisition module is used for acquiring the locking transmission torque of the hydraulic torque converter locking device and the transmission torque required by the driver;

the first torque difference acquisition module is used for acquiring the torque sum of the locking transmission torque and the hydraulic transmission torque and acquiring a first torque difference between the torque sum and the transmission torque required by the driver;

and the acceleration detection module is used for generating first unexpected acceleration information when the first torque difference is larger than or equal to a first torque difference threshold value, and the first unexpected acceleration information is used for indicating that the acceleration of the vehicle is larger than or equal to a first preset acceleration threshold value when the hydraulic torque converter locking device is locked.

The embodiment of the application provides a torque converter detection chip, and the torque converter detection chip calls a stored program to realize the following method:

acquiring the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter;

acquiring hydraulic torque transmission torque of the hydraulic torque converter according to the rotating speed of the turbine and the rotating speed of the pump impeller;

acquiring a locking transmission torque of a hydraulic torque converter locking device and a torque transmission torque required by a driver;

acquiring a torque sum of a locking transmission torque and a hydraulic transmission torque, and acquiring a first torque difference between the torque sum and a transmission torque required by a driver;

first unintended acceleration information is generated when the first torque difference is greater than or equal to a first torque difference threshold, the first unintended acceleration information being used to indicate that the acceleration of the vehicle is greater than or equal to a first preset acceleration threshold when the torque converter locking device is locked.

In the embodiment of the application, the hydraulic torque transmission torque of the hydraulic torque converter is obtained according to the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter, the locking transmission torque of the locking device of the hydraulic torque converter and the driver required torque transmission torque are obtained, the sum of the locking transmission torque and the hydraulic torque transmission torque is obtained, a first torque difference between the torque sum and the driver required torque transmission torque is obtained, first unexpected acceleration information is generated when the first torque difference is larger than or equal to a first torque difference threshold value, and the first unexpected acceleration information is used for indicating that the acceleration of a vehicle is larger than or equal to a first preset acceleration threshold value when the locking device of the hydraulic torque converter is locked. When the first torque difference is greater than or equal to the first torque difference threshold, the torque output by the torque converter when the torque converter locking device is locked can be considered to be greater than the torque output by the torque converter required by a driver, and at the moment, first unexpected acceleration information used for indicating that the acceleration of the vehicle when the torque converter locking device is locked is greater than or equal to a first preset acceleration threshold is generated, so that the vehicle can control the working state of the torque converter according to the first unexpected acceleration information, a user is prevented from being subjected to unexpected acceleration without early warning, and user experience is improved.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic block diagram of a torque converter provided in an embodiment of the present application;

FIG. 2 is a schematic flow chart of a torque converter monitoring method provided by an embodiment of the present application;

FIG. 3 is a schematic flow chart of a torque converter monitoring method provided by an embodiment of the present application;

FIG. 4 is a schematic flow chart of a torque converter monitoring method provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a torque converter testing apparatus according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The following further describes specific implementation of the embodiments of the present invention with reference to the drawings.

A hydrodynamic torque converter is an essential component of an automatic transmission in a vehicle, which is generally connected to an engine of a motor vehicle via a hydrodynamic torque converter. As shown in fig. 1, fig. 1 is a schematic structural diagram of a torque converter according to an embodiment of the present application, and a torque converter 10 generally includes a pump 11, a turbine 12, and a lock-up device 13. The pump impeller 11 is connected with the engine 20, the turbine 13 is connected with the automatic transmission 30, the automatic transmission 30 drives the wheels 40, the locking device 13 can be in a release state or a locking state, in the release state, the turbine 12 is separated from the pump impeller 11, the engine 20 drives the pump impeller 11 to rotate, and the pump impeller 11 drives the turbine 12 to rotate by stirring hydraulic oil in the hydraulic torque converter 10; in the locked state, the torque converter 10 locks the pump impeller 11 and the turbine runner 12 by the locking device 13, that is, connects the pump impeller 11 and the turbine runner 12, so that the pump impeller 11 can directly transmit power to the turbine runner 12.

When the locking device of the torque converter performs the releasing action, the torque converter is quickly changed from complete mechanical torque transmission to complete hydraulic torque transmission, and at the moment, the vehicle may generate large acceleration, and if whether the vehicle generates large acceleration cannot be determined, the user may be subjected to unexpected acceleration, and the user experience is damaged.

Example one

An embodiment of the present application provides a method for monitoring a torque converter, as shown in fig. 2, and fig. 2 is a schematic flowchart of the method for monitoring a torque converter provided in the embodiment of the present application. The hydraulic torque converter monitoring method comprises the following steps:

in step 101, the turbine rotational speed and the pump rotational speed of the torque converter are acquired.

The obtaining of the turbine rotation speed and the pump rotation speed of the hydraulic torque converter may be understood as obtaining the turbine rotation speed through a turbine rotation speed sensor in the hydraulic torque converter, and obtaining the pump rotation speed through a pump rotation speed sensor in the hydraulic torque converter.

In step 102, a hydrodynamic torque transmission of the torque converter is obtained according to the turbine rotation speed and the pump wheel rotation speed.

For example, obtaining the hydraulic torque transmission torque of the hydraulic torque converter according to the turbine rotation speed and the pump wheel rotation speed can be achieved through the following steps:

and inquiring a capacity characteristic coefficient database according to the turbine rotating speed and the pump rotating speed so as to determine a capacity characteristic coefficient corresponding to the turbine rotating speed and the pump rotating speed.

And inquiring in a torque ratio database according to the turbine rotating speed and the pump rotating speed so as to determine the torque ratio of the hydraulic torque converter corresponding to the turbine rotating speed and the pump rotating speed.

According to T _ pump ═ C _ TC ═ n _ pump²The pump wheel torque T _ pump is obtained, where C _ TC is a capacity characteristic coefficient and n _ pump is a pump wheel speed.

And acquiring hydraulic torque transmission torque T _ hydrar according to T _ hydrar, wherein T _ pump is pump wheel torque, and lambda is torque converter torque ratio.

Wherein, the torque converter torque ratio can be used for indicating the corresponding relation between the turbine speed and the capacity characteristic coefficient, and the torque ratio database can be used for indicating the corresponding relation between the turbine speed and the torque converter torque ratio. Before the hydraulic torque converter monitoring method provided by the application is executed, a capacity characteristic coefficient database and a torque ratio database can be obtained by performing bench test on the hydraulic torque converter.

In step 103, a lock-up transmission torque of the torque converter lock-up device and a driver-requested transmission torque are acquired.

For example, the lockup transfer torque of the torque converter locking device may be obtained by obtaining a control current of the torque converter locking device, querying a pressure-current database according to the control current to obtain a pressure of a lockup clutch in the torque converter locking device, and querying a lockup mechanism torque characteristic database according to the pressure of the lockup clutch to obtain the lockup transfer torque of the torque converter locking device. Wherein the pressure-current database may be used to indicate a correspondence between the control current and the pressure of the lock-up clutch, and the lock-up mechanism torque characteristic database may be used to indicate a correspondence between the pressure of the lock-up clutch and the lock-up transmission torque of the torque converter lock-up device. Before the hydraulic torque converter monitoring method provided by the application is executed, a pressure-current database and a locking mechanism torque characteristic database can be obtained by performing bench test on the hydraulic torque converter.

In addition, since it can be considered that the driver required torque transmission is the same as the torque output before the torque converter locking device is locked, the driver required torque transmission can be obtained by obtaining the current engine actual torque T _ eng and obtaining the driver required torque transmission T _ drvr from T _ drvr ═ T _ eng × λ, where λ is the torque converter torque ratio.

In step 104, first unintended acceleration information is generated when the first torque difference is greater than or equal to a first torque difference threshold.

Wherein the first unexpected acceleration information is used to indicate that the acceleration of the vehicle when the torque converter locking device is locked is greater than or equal to a first preset acceleration threshold. The acceleration of the vehicle is greater than or equal to the first preset acceleration threshold, which may be understood as the user experiencing significant discomfort when subjected to an acceleration greater than or equal to the first preset acceleration threshold. Preferably, the first preset acceleration threshold may be 0.2 g.

In the embodiment of the application, the hydraulic torque transmission torque of the hydraulic torque converter is obtained according to the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter, the locking transmission torque of the locking device of the hydraulic torque converter and the driver required torque transmission torque are obtained, the sum of the locking transmission torque and the hydraulic torque transmission torque is obtained, a first torque difference between the torque sum and the driver required torque transmission torque is obtained, first unexpected acceleration information is generated when the first torque difference is larger than or equal to a first torque difference threshold value, and the first unexpected acceleration information is used for indicating that the acceleration of a vehicle is larger than or equal to a first preset acceleration threshold value when the locking device of the hydraulic torque converter is locked. When the first torque difference is greater than or equal to the first torque difference threshold, the torque output by the torque converter when the torque converter locking device is locked can be considered to be greater than the torque output by the torque converter required by a driver, and at the moment, first unexpected acceleration information used for indicating that the acceleration of the vehicle when the torque converter locking device is locked is greater than or equal to a first preset acceleration threshold is generated, so that the vehicle can control the working state of the torque converter according to the first unexpected acceleration information, a user is prevented from being subjected to unexpected acceleration without early warning, and user experience is improved.

Optionally, in an embodiment of the present application, as shown in fig. 3, fig. 3 is a schematic flowchart of a torque converter monitoring method provided in the embodiment of the present application, where the method further includes step 105:

in step 105, the torque converter locking device is inhibited from performing the releasing operation when the first torque difference is greater than or equal to a first torque difference threshold.

By inhibiting the torque converter locking device from performing the release operation when the first torque difference is greater than or equal to the first torque difference threshold, the vehicle may not experience significant acceleration, the user may be prevented from experiencing unintended acceleration, and the user experience may be improved.

Optionally, in an embodiment of the present application, as shown in fig. 4, fig. 4 is a schematic flowchart of a torque converter monitoring method provided in the embodiment of the present application, where the method further includes steps 106 to 111:

in step 106, a capacity characteristic coefficient corresponding to the turbine rotation speed and the pump rotation speed is acquired, and the pump output end torque of the torque converter after the lockup device of the torque converter is released is acquired according to the pump rotation speed and the capacity characteristic coefficient.

The specific implementation manner of obtaining the capacity characteristic coefficient corresponding to the turbine rotation speed and the pump rotation speed may refer to the content in step 102.

In step 107, current vehicle throttle operating parameters, current vehicle engine speed, and engine torque characteristic parameters are obtained.

In step 108, according to the current vehicle accelerator operating parameter, the current vehicle engine speed and the engine torque characteristic parameter, obtaining the pump impeller input end torque after the torque converter locking device is released in the current state.

In step 109, when the torque at the output end of the pump impeller is equal to the torque at the input end of the pump impeller, the turbine steady-state output torque of the torque converter after the locking device of the torque converter is released in the current state is obtained according to the current working parameters of the vehicle accelerator and the current engine speed of the vehicle.

Specifically, step 109 can be implemented by the following steps:

and when the torque of the output end of the pump wheel is equal to the torque of the input end of the pump wheel, acquiring the stable rotating speed of the pump wheel according to the current working parameters of the accelerator of the vehicle and the current rotating speed of the engine of the vehicle.

According to T _ pump _ stable, C _ TC n _ pump _ stable²And acquiring steady-state output torque T _ pump _ stable of the pump wheel, wherein n _ pump _ stable is the steady rotating speed of the pump wheel.

And acquiring the torque ratio lambda _ stable of the hydraulic torque converter according to the rotating speed of the turbine and the stable rotating speed of the pump wheel.

And acquiring the turbine steady-state output torque T _ release according to the T _ release, namely T _ pump _ stable and lambda _ stable.

Because the capacity characteristic coefficient gradually rises and the rotating speed of the pump impeller also synchronously rises along with the rise of the rotating speed of the pump impeller and the rise of the rotating speed of the turbine is assumed to be small, the torque at the output end of the pump impeller always rises along with the rotating speed p of the pump impeller, and meanwhile, the torque value output by the pump impeller has an upper limit in consideration of the physical characteristics of an engine, so that the torque at the input end of the pump impeller is limited to rise only in a limited way, namely, the torque upper limit exists, and therefore when the torque at the output end of the pump impeller is equal to the torque at the input end of the pump impeller, the rotating speed of the pump impeller can be considered to be a stable rotating speed at the moment.

In step 110, a lock-up output torque of the torque converter when the torque converter lock-up device is released is obtained, and a second torque difference between the lock-up output torque and the turbine steady-state output torque is obtained.

In step 111, second unintended acceleration information is generated when the second torque difference is greater than or equal to a second torque difference threshold.

Wherein the second unexpected acceleration information is used to indicate that the acceleration of the vehicle is greater than or equal to a second preset acceleration threshold when the torque converter locking device is released. Preferably, the second preset acceleration threshold may be 0.2g

In the above scheme, when the two torque differences are greater than or equal to the second torque difference threshold, it may be considered that the torque converter is unbalanced in stress when the torque converter locking device is released, and at this time, second unexpected acceleration information indicating that the acceleration of the vehicle is greater than or equal to the second preset acceleration threshold when the torque converter locking device is locked is generated, so that the vehicle may control the operating state of the torque converter according to the second unexpected acceleration information, avoid the user from being subjected to unexpected acceleration without warning, and improve user experience.

Example II,

The embodiment of the application provides a torque converter detection device, as shown in fig. 5, fig. 5 is a schematic structural diagram of the torque converter detection device provided by the embodiment of the application, and the torque converter detection device 200 comprises a rotating speed acquisition module 201, a first transmission torque acquisition module 202, a second transmission torque acquisition module 203, a first torque difference acquisition module 204 and an acceleration detection module 205.

The rotating speed obtaining module 201 is configured to obtain a turbine rotating speed and a pump rotating speed of the hydraulic torque converter.

The first torque transmission torque acquisition module 202 is configured to acquire a hydraulic torque transmission torque of the hydraulic torque converter according to the turbine rotation speed and the pump rotation speed.

A second torque transfer acquisition module 203 acquires a lock-up torque transfer of the torque converter lock-up device and a driver requested torque transfer.

The first torque difference acquisition module 204 is configured to acquire a torque sum of the lock-up transmission torque and the hydraulic transmission torque and acquire a first torque difference between the torque sum and the driver requested transmission torque.

An acceleration detection module 205 is configured to generate a first unexpected acceleration information when the first torque difference is greater than or equal to a first torque difference threshold, the first unexpected acceleration information indicating that an acceleration of the vehicle is greater than or equal to a first preset acceleration threshold when the torque converter locking device is locked.

In an embodiment of the present application, there is provided a torque converter detecting apparatus including: the device comprises a rotating speed acquisition module, a first torque transmission torque acquisition module, a second torque transmission torque acquisition module, a first torque difference acquisition module and an acceleration detection module, wherein the rotating speed acquisition module is used for acquiring the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter, the first torque transmission torque acquisition module is used for acquiring the hydraulic torque transmission torque of the hydraulic torque converter according to the turbine rotating speed and the pump impeller rotating speed, the second torque transmission torque acquisition module is used for acquiring the locking transmission torque and the driver required torque transmission torque of a locking device of the hydraulic torque converter, the first torque difference acquisition module is used for acquiring the torque sum of the locking transmission torque and the hydraulic torque transmission torque and acquiring the first torque difference between the torque sum and the driver required torque transmission torque, the acceleration detection module is used for generating first unexpected acceleration information when the first torque difference is larger than or equal to a first torque difference threshold value, and the first unexpected acceleration information is used for indicating that the acceleration of a vehicle is larger than or equal to the acceleration when the locking device of the hydraulic torque converter locking device A first preset acceleration threshold. When the first torque difference is greater than or equal to the first torque difference threshold, the torque output by the torque converter when the torque converter locking device is locked can be considered to be greater than the torque output by the torque converter required by a driver, and at the moment, first unexpected acceleration information used for indicating that the acceleration of the vehicle when the torque converter locking device is locked is greater than or equal to a first preset acceleration threshold is generated, so that the vehicle can control the working state of the torque converter according to the first unexpected acceleration information, a user is prevented from being subjected to unexpected acceleration without early warning, and user experience is improved.

Example III,

Based on the torque converter detection method described in the foregoing embodiment, an embodiment of the present application provides an electronic device for executing the torque converter detection method described in the foregoing embodiment, as shown in fig. 6, where fig. 6 is a schematic structural diagram of an electronic device provided in an embodiment of the present application, and the electronic device 300 includes: at least one processor (processor)302, memory 304, bus 306, and communication Interface (communication Interface) 308.

Wherein:

the processor 302, communication interface 308, and memory 304 communicate with each other via a communication bus 306.

A communication interface 308 for communicating with other devices.

The processor 302 is configured to execute the program 310, and may specifically perform relevant steps in the methods described in the first to fourth embodiments.

In particular, program 310 may include program code comprising computer operating instructions.

The processor 302 may be a central processing unit CPU or an ASIC specific integrated circuit

(Application Specific Integrated Circuit) or one or more Integrated circuits configured to implement embodiments of the invention. The electronic device comprises one or more processors, which can be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.

And a memory 304 for storing a program 310. Memory 304 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

Example four,

The embodiment of the application provides a torque converter detection chip, and the torque converter detection chip calls a stored program to realize the following method:

acquiring the turbine rotating speed and the pump impeller rotating speed of the hydraulic torque converter;

acquiring hydraulic torque transmission torque of the hydraulic torque converter according to the rotating speed of the turbine and the rotating speed of the pump impeller;

acquiring a locking transmission torque of a hydraulic torque converter locking device and a torque transmission torque required by a driver;

acquiring a torque sum of a locking transmission torque and a hydraulic transmission torque, and acquiring a first torque difference between the torque sum and a transmission torque required by a driver;

first unintended acceleration information is generated when the first torque difference is greater than or equal to a first torque difference threshold, the first unintended acceleration information being used to indicate that the acceleration of the vehicle is greater than or equal to a first preset acceleration threshold when the torque converter locking device is locked.

The character recognition device of the embodiments of the present application exists in various forms, including but not limited to:

(1) a mobile communication device: such devices are characterized by mobile communications capabilities and are primarily targeted at providing voice, data communications. Such terminals include: smart phones (e.g., iphones), multimedia phones, functional phones, and low-end phones, among others.

(2) Ultra mobile personal computer device: the equipment belongs to the category of personal computers, has calculation and processing functions and generally has the characteristic of mobile internet access. Such terminals include: PDA, MID, and UMPC devices, etc., such as ipads.

(3) A portable entertainment device: such devices can display and play multimedia content. This type of device comprises: audio, video players (e.g., ipods), handheld game consoles, electronic books, and smart toys and portable car navigation devices.

(4) And other electronic equipment with data interaction function.

Thus, particular embodiments of the present subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may be advantageous.

In the 90 s of the 20 th century, improvements in a technology could clearly distinguish between improvements in hardware (e.g., improvements in circuit structures such as diodes, transistors, switches, etc.) and improvements in software (improvements in process flow). However, as technology advances, many of today's process flow improvements have been seen as direct improvements in hardware circuit architecture. Designers almost always obtain the corresponding hardware circuit structure by programming an improved method flow into the hardware circuit. Thus, it cannot be said that an improvement in the process flow cannot be realized by hardware physical modules. For example, a Programmable Logic Device (PLD), such as a Field Programmable Gate Array (FPGA), is an integrated circuit whose Logic functions are determined by programming the Device by a user. A digital system is "integrated" on a PLD by the designer's own programming without requiring the chip manufacturer to design and fabricate application-specific integrated circuit chips. Furthermore, nowadays, instead of manually making an Integrated Circuit chip, such Programming is often implemented by "logic compiler" software, which is similar to a software compiler used in program development and writing, but the original code before compiling is also written by a specific Programming Language, which is called Hardware Description Language (HDL), and HDL is not only one but many, such as abel (advanced Boolean Expression Language), ahdl (alternate Language Description Language), traffic, pl (core unified Programming Language), HDCal, JHDL (Java Hardware Description Language), langue, Language, HDL, las, software, Hardware Description Language (software Description Language), and so on. It will also be apparent to those skilled in the art that hardware circuitry that implements the logical method flows can be readily obtained by merely slightly programming the method flows into an integrated circuit using the hardware description languages described above.

The controller may be implemented in any suitable manner, for example, the controller may take the form of, for example, a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, and an embedded microcontroller, examples of which include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320, the memory controller may also be implemented as part of the control logic for the memory. Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may thus be considered a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.

The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular transactions or implement particular abstract data types. The application may also be practiced in distributed computing environments where transactions are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.