阅读说明：本技术 车辆增程器启动方法、装置、设备及存储介质 (Vehicle range extender starting method, device, equipment and storage medium ) 是由 范鹏 邓湘 王凯 毕帅 刘军克 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种车辆增程器启动方法、装置、设备及存储介质,所述方法通过获取发电机控制器的初段扭矩信号,根据所述初段扭矩信号调节发电机的输出扭矩；实时检测发动机的启动转速,根据所述启动转速确定是否通过所述发电机带动所述发动机缓坡启动；获取所述发电机控制器的尾段扭矩信号,根据所述尾段扭矩信号调节所述发电机的输出扭矩；能够避免增程器启动过程中存在曲轴轴瓦磨损风险,避免了限扭减振器的打滑风险,提高整车使用性能,延长了增程器的使用寿命,提升了NVH性能。(The invention discloses a starting method, a starting device, starting equipment and a storage medium of a vehicle range extender, wherein the method comprises the steps of obtaining an initial section torque signal of a generator controller and adjusting the output torque of a generator according to the initial section torque signal; detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed; acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal; the wear risk of a crankshaft bearing bush in the starting process of the range extender can be avoided, the slipping risk of the torque-limiting shock absorber is avoided, the use performance of the whole vehicle is improved, the service life of the range extender is prolonged, and the NVH performance is improved.)

1. A vehicle range extender starting method, comprising:

acquiring an initial section torque signal of a generator controller, and adjusting the output torque of a generator according to the initial section torque signal;

detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed;

and acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal.

2. The vehicle range extender starting method of claim 1 wherein said obtaining a generator controller primary torque signal and adjusting the generator output torque based on said primary torque signal comprises:

the method comprises the steps of obtaining initial torque from a preset starting test curve of a range extender, generating an initial torque signal according to the initial torque, and controlling the output torque of a generator to rise at a constant speed according to the initial torque signal.

3. The vehicle range extender starting method according to claim 2, wherein the step of obtaining the initial torque from a preset range extender starting test curve and controlling the output torque of the generator to rise at a constant speed according to the initial torque comprises the steps of:

obtaining an initial section torque corresponding to a target starting rotating speed from a preset range extender starting test curve;

and generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal and a first preset rising frequency.

4. The vehicle range extender starting method according to claim 2, wherein before obtaining the initial torque from a preset range extender starting test curve, generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal, the vehicle range extender starting method further comprises:

training a generator and an engine of the range extender under different torques to obtain a preset starting test curve of the range extender.

5. The vehicle range extender starting method according to claim 1, wherein said detecting a starting speed of an engine in real time and determining whether the engine is started in a gentle slope by the generator based on the starting speed comprises:

detecting the starting rotating speed and the current oil pressure of the engine in real time, and determining that the engine is driven by the generator to start in a gentle slope within a preset interval time when the starting rotating speed is less than a preset starting rotating speed and the current oil pressure is greater than or equal to a preset oil pressure;

and when the starting rotating speed is greater than or equal to a preset starting rotating speed, determining that the engine is not driven by the generator to start in a gentle slope.

6. The vehicle range extender starting method of claim 3 wherein said obtaining an end section torque signal of said generator controller and adjusting an output torque of said generator in accordance with said end section torque signal comprises:

obtaining a peak torque from the preset range extender starting test curve, and generating a tail section torque signal of the generator controller according to the peak torque;

and controlling the output torque of the generator to accelerate and rise according to the tail section torque signal and a second preset rising frequency, wherein the second preset rising frequency is higher than the first preset rising frequency.

7. The vehicle range extender starting method of claim 1, wherein after obtaining an end piece torque signal of the generator controller and adjusting an output torque of the generator based on the end piece torque signal, the vehicle range extender starting method further comprises:

and acquiring a tail section starting interval corresponding to the tail section torque signal, and controlling the generator and the engine to carry out rotating speed coupling in the tail section starting interval.

8. A vehicle range extender starting device, comprising:

the initial-stage torque adjusting module is used for acquiring an initial-stage torque signal of the generator controller and adjusting the output torque of the generator according to the initial-stage torque signal;

the starting module is used for detecting the starting rotating speed of the engine in real time and determining whether the engine is driven by the generator to start in a gentle slope mode according to the starting rotating speed;

and the tail section torque adjusting module is used for acquiring a tail section torque signal of the generator controller and adjusting the output torque of the generator according to the tail section torque signal.

9. A vehicle range extender starting device, comprising: a memory, a processor, and a vehicle range extender start-up program stored on the memory and executable on the processor, the vehicle range extender start-up program configured to implement the steps of the vehicle range extender start-up method of any one of claims 1 to 7.

10. A storage medium having stored thereon a vehicle range extender start-up program which, when executed by a processor, implements the steps of the vehicle range extender start-up method of any one of claims 1 to 7.

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a starting method, a starting device, starting equipment and a storage medium of a vehicle range extender.

Background

In general, a generator controller outputs a torque signal to a generator to generate a driving force, the driving force is transmitted to a torque-limiting damper by an output shaft of the generator, and the driving force is transmitted to a flywheel end of an engine by the torque-limiting damper, so that the engine is driven to complete a starting process.

One of the existing schemes is that a generator controller provides a large torque signal, a range extender is quickly started, the starting time is generally controlled to be 0.4-0.6 second, but the scheme can bring early wear of an engine bearing bush caused by insufficient lubrication, even crankshaft locking, and if the starting torque is too large, a torque-limiting shock absorber can even slip, the impact of a limiting block can affect the service performance of the whole vehicle and the service life of the range extender.

The other scheme in the prior art is that a generator controller provides a low torque signal, a range extender is slowly started, the starting time is generally controlled to be about 0.8-1 second, but due to the fact that the starting time is prolonged, the rotating speed of a generator and a torque limiting shock absorber fluctuates, the Noise, Vibration and Harshness (NVH) performance can be affected, and even the starting is unsuccessful.

Disclosure of Invention

The invention mainly aims to provide a vehicle range extender starting method, a vehicle range extender starting device, vehicle range extender starting equipment and a vehicle range extender starting storage medium, and aims to solve the technical problems that in the prior art, a crankshaft bearing bush abrasion risk exists in the range extender starting process, NVH performance is influenced, and even starting is unsuccessful.

In a first aspect, the present invention provides a vehicle range extender starting method, comprising the steps of:

acquiring an initial section torque signal of a generator controller, and adjusting the output torque of a generator according to the initial section torque signal;

detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed;

and acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal.

Optionally, the obtaining an initial torque signal of a generator controller and adjusting an output torque of a generator according to the initial torque signal includes:

the method comprises the steps of obtaining initial torque from a preset starting test curve of a range extender, generating an initial torque signal according to the initial torque, and controlling the output torque of a generator to rise at a constant speed according to the initial torque signal.

Optionally, the obtaining of the initial torque from a preset starting test curve of the range extender and the controlling of the output torque of the generator to rise at a constant speed according to the initial torque include:

obtaining an initial section torque corresponding to a target starting rotating speed from a preset range extender starting test curve;

and generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal and a first preset rising frequency.

Optionally, before obtaining an initial torque from a preset starting test curve of the range extender, generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal, the starting method of the range extender of the vehicle further includes:

training a generator and an engine of the range extender under different torques to obtain a preset starting test curve of the range extender.

Optionally, the detecting a starting rotation speed of the engine in real time, and determining whether to drive the engine to start in a gentle slope through the generator according to the starting rotation speed includes:

detecting the starting rotating speed and the current oil pressure of the engine in real time, and determining that the engine is driven by the generator to start in a gentle slope within a preset interval time when the starting rotating speed is less than a preset starting rotating speed and the current oil pressure is greater than or equal to a preset oil pressure;

and when the starting rotating speed is greater than or equal to a preset starting rotating speed, determining that the engine is not driven by the generator to start in a gentle slope.

Optionally, the obtaining a tail section torque signal of the generator controller and adjusting the output torque of the generator according to the tail section torque signal includes:

obtaining a peak torque from the preset range extender starting test curve, and generating a tail section torque signal of the generator controller according to the peak torque;

and controlling the output torque of the generator to accelerate and rise according to the tail section torque signal and a second preset rising frequency, wherein the second preset rising frequency is higher than the first preset rising frequency.

Optionally, after acquiring the tail section torque signal of the generator controller and adjusting the output torque of the generator according to the tail section torque signal, the vehicle range extender starting method further includes:

and acquiring a tail section starting interval corresponding to the tail section torque signal, and controlling the generator and the engine to carry out rotating speed coupling in the tail section starting interval.

In a second aspect, to achieve the above object, the present invention further provides a vehicle range extender starting device, including:

the initial-stage torque adjusting module is used for acquiring an initial-stage torque signal of the generator controller and adjusting the output torque of the generator according to the initial-stage torque signal;

the starting module is used for detecting the starting rotating speed of the engine in real time and determining whether the engine is driven by the generator to start in a gentle slope mode according to the starting rotating speed;

and the tail section torque adjusting module is used for acquiring a tail section torque signal of the generator controller and adjusting the output torque of the generator according to the tail section torque signal.

In a third aspect, to achieve the above object, the present invention also proposes a vehicle range extender starting apparatus comprising: a memory, a processor, and a vehicle range extender start-up program stored on the memory and executable on the processor, the vehicle range extender start-up program configured to implement the steps of the vehicle range extender start-up method as described above.

In a fourth aspect, to achieve the above object, the present invention further provides a storage medium having a vehicle range extender starting program stored thereon, wherein the vehicle range extender starting program, when executed by a processor, implements the steps of the vehicle range extender starting method as described above.

The starting method of the vehicle range extender provided by the invention comprises the steps of obtaining an initial section torque signal of a generator controller, and adjusting the output torque of a generator according to the initial section torque signal; detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed; acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal; the wear risk of a crankshaft bearing bush in the starting process of the range extender can be avoided, the slipping risk of the torque-limiting shock absorber is avoided, the use performance of the whole vehicle is improved, the service life of the range extender is prolonged, and the NVH performance is improved.

Drawings

FIG. 1 is a schematic diagram of an apparatus architecture of a hardware operating environment according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart diagram illustrating a first embodiment of a method for starting a range extender of a vehicle in accordance with the present invention;

FIG. 3 is a schematic flow chart diagram illustrating a second embodiment of a vehicle range extender starting method of the present invention;

FIG. 4 is a schematic flow chart diagram illustrating a third embodiment of a method for starting a range extender of a vehicle in accordance with the present invention;

FIG. 5 is a schematic flow chart diagram illustrating a fourth embodiment of a method for starting a range extender of a vehicle in accordance with the present invention;

FIG. 6 is a schematic flow chart diagram illustrating a fifth embodiment of a method for starting a range extender of a vehicle in accordance with the present invention;

FIG. 7 is a schematic flow chart diagram illustrating a sixth embodiment of a vehicle range extender starting method of the present invention;

FIG. 8 is a schematic flow chart diagram illustrating a sixth embodiment of a vehicle range extender starting method of the present invention;

fig. 9 is a functional block diagram of the first embodiment of the vehicle range extender starting apparatus of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The solution of the embodiment of the invention is mainly as follows: the method comprises the steps that an initial section torque signal of a generator controller is obtained, and the output torque of a generator is adjusted according to the initial section torque signal; detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed; acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal; the wear risk of a crankshaft bearing bush in the starting process of the range extender can be avoided, the slipping risk of the torque-limiting shock absorber is avoided, the use performance of the whole vehicle is improved, the service life of the range extender is prolonged, the NVH performance is improved, and the technical problems that the wear risk of the crankshaft bearing bush exists in the starting process of the range extender, the NVH performance is influenced, and even the starting is unsuccessful in the prior art are solved.

Referring to fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.

As shown in fig. 1, the apparatus may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a Wi-Fi interface). The Memory 1005 may be a high-speed RAM Memory or a Non-Volatile Memory (Non-Volatile Memory), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.

Those skilled in the art will appreciate that the configuration of the apparatus shown in fig. 1 is not intended to be limiting of the apparatus and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a vehicle range extender start-up program.

The apparatus of the present invention calls a vehicle range extender start-up program stored in the memory 1005 by the processor 1001, and performs the following operations:

acquiring an initial section torque signal of a generator controller, and adjusting the output torque of a generator according to the initial section torque signal;

detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed;

and acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal.

The apparatus of the present invention calls a vehicle range extender start-up program stored in the memory 1005 by the processor 1001, and also performs the following operations:

the method comprises the steps of obtaining initial torque from a preset starting test curve of a range extender, generating an initial torque signal according to the initial torque, and controlling the output torque of a generator to rise at a constant speed according to the initial torque signal.

The apparatus of the present invention calls a vehicle range extender start-up program stored in the memory 1005 by the processor 1001, and also performs the following operations:

obtaining an initial section torque corresponding to a target starting rotating speed from a preset range extender starting test curve;

and generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal and a first preset rising frequency.

The apparatus of the present invention calls a vehicle range extender start-up program stored in the memory 1005 by the processor 1001, and also performs the following operations:

training a generator and an engine of the range extender under different torques to obtain a preset starting test curve of the range extender.

The apparatus of the present invention calls a vehicle range extender start-up program stored in the memory 1005 by the processor 1001, and also performs the following operations:

detecting the starting rotating speed and the current oil pressure of the engine in real time, and determining that the engine is driven by the generator to start in a gentle slope within a preset interval time when the starting rotating speed is less than a preset starting rotating speed and the current oil pressure is greater than or equal to a preset oil pressure;

and when the starting rotating speed is greater than or equal to a preset starting rotating speed, determining that the engine is not driven by the generator to start in a gentle slope.

The apparatus of the present invention calls a vehicle range extender start-up program stored in the memory 1005 by the processor 1001, and also performs the following operations:

obtaining a peak torque from the preset range extender starting test curve, and generating a tail section torque signal of the generator controller according to the peak torque;

and controlling the output torque of the generator to accelerate and rise according to the tail section torque signal and a second preset rising frequency, wherein the second preset rising frequency is higher than the first preset rising frequency.

The apparatus of the present invention calls a vehicle range extender start-up program stored in the memory 1005 by the processor 1001, and also performs the following operations:

and acquiring a tail section starting interval corresponding to the tail section torque signal, and controlling the generator and the engine to carry out rotating speed coupling in the tail section starting interval.

According to the scheme, the output torque of the generator is adjusted according to the initial torque signal by acquiring the initial torque signal of the generator controller; detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed; acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal; the wear risk of a crankshaft bearing bush in the starting process of the range extender can be avoided, the slipping risk of the torque-limiting shock absorber is avoided, the use performance of the whole vehicle is improved, the service life of the range extender is prolonged, and the NVH performance is improved.

Based on the hardware structure, the embodiment of the starting method of the vehicle range extender is provided.

Referring to fig. 2, fig. 2 is a flowchart illustrating a first embodiment of a method for starting a range extender of a vehicle according to the present invention.

In a first embodiment, the vehicle range extender starting method comprises the steps of:

and step S10, obtaining an initial torque signal of the generator controller, and adjusting the output torque of the generator according to the initial torque signal.

It should be noted that the initial torque signal is a signal corresponding to the initial torque output by the generator controller of the range extender, and is used for primarily pulling up the torque, that is, the output torque of the generator is adjusted according to the initial torque signal.

And step S20, detecting the starting rotating speed of the engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode according to the starting rotating speed.

It can be understood that by detecting the starting rotating speed of the engine in real time, different starting strategies can be determined according to the starting rotating speed of the transmitter, namely whether the engine is driven by the generator to start in a gentle slope is determined according to the starting rotating speed.

And step S30, acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal.

It should be understood that the tail section torque signal is a signal corresponding to the tail section torque output by the generator controller of the range extender, and is used for rapidly pulling up the torque of the generator, that is, the output torque of the generator is adjusted according to the tail section torque signal.

According to the scheme, the output torque of the generator is adjusted according to the initial torque signal by acquiring the initial torque signal of the generator controller; detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed; acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal; the wear risk of a crankshaft bearing bush in the starting process of the range extender can be avoided, the slipping risk of the torque-limiting shock absorber is avoided, the use performance of the whole vehicle is improved, the service life of the range extender is prolonged, and the NVH performance is improved.

Further, fig. 3 is a schematic flow chart of a second embodiment of the vehicle range extender starting method, as shown in fig. 3, the second embodiment of the vehicle range extender starting method is proposed based on the first embodiment, and in this embodiment, the step S10 specifically includes the following steps:

and step S11, obtaining initial torque from a preset range extender starting test curve, generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal.

It should be noted that the preset range extender starting test curve is a sample curve of different engine speeds corresponding to different torques and time in the range extender starting process determined in advance through a large amount of experimental data, and can obtain a primary torque from the preset range extender starting test curve, generate a corresponding primary torque signal through the primary torque data, and further control the torque of the generator to rise gently according to the primary torque signal, and certainly also rise gently in a non-uniform speed, that is, rise gently overall with a small speed fluctuation, so as to avoid the torque limiting shock absorber from slipping, and prolong the service life of the range extender.

According to the scheme, the initial torque is obtained from the preset starting test curve of the range extender, the initial torque is generated to generate the initial torque signal, the output torque of the generator is controlled to rise at a constant speed by the initial torque signal, the output torque of the generator can rise gently, early abrasion and even locking of an engine bearing bush caused by insufficient lubrication are avoided, the slipping risk of a torque limiting shock absorber is avoided, and the use performance of the whole vehicle is improved.

Further, fig. 4 is a schematic flow chart of a third embodiment of the vehicle range extender starting method of the present invention, and as shown in fig. 4, the third embodiment of the vehicle range extender starting method of the present invention is proposed based on the second embodiment, in this embodiment, the step S11 specifically includes the following steps:

and S111, obtaining an initial section torque corresponding to the target starting rotating speed from a preset range extender starting test curve.

The target starting rotation speed is the starting rotation speed of the engine when the torque of the generator is controlled to be gradually increased in the preset range extender starting test curve, and the torque at the same moment corresponding to the target starting rotation speed is used as the initial-stage torque.

And S112, generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal and a first preset rising frequency.

It can be understood that an initial-stage torque signal is generated according to the initial-stage torque, the first preset rising frequency is a frequency of a rising potential head of a determined torque rising continuously, the output torque rising of the generator can be continuously and smoothly controlled by combining the initial-stage torque signal through the first preset rising frequency, and certainly, the output torque rising can also be smoothly and unevenly rising.

According to the scheme, the initial section torque corresponding to the target starting rotating speed is obtained from the preset range extender starting test curve; according to the initial section torque, an initial section torque signal is generated, the output torque of the generator is controlled to rise at a constant speed according to the initial section torque signal and the first preset rising frequency, the phenomenon that the torque-limiting shock absorber slips due to the fact that the starting torque is too large and the limit block impacts, the service performance of the whole vehicle is affected, the service life of the range extender is prolonged, and the service performance of the whole vehicle is improved.

Further, fig. 5 is a schematic flowchart of a fourth embodiment of the vehicle range extender starting method according to the present invention, and as shown in fig. 5, the fourth embodiment of the vehicle range extender starting method according to the present invention is proposed based on the second embodiment, in this embodiment, before the step S11, the vehicle range extender starting method further includes the following steps:

and S101, training a generator and an engine of the range extender under different torques to obtain a preset starting test curve of the range extender.

It should be noted that the preset range extender starting test curve is a sample curve of different engine speeds corresponding to different torques and time in the range extender starting process determined in advance through a large amount of experimental data, the generator and the engine of the range extender are trained under different torques, test data corresponding to different generator controller speeds and engine speeds along with the time lapse under different torques can be obtained, generally, a relatively fixed range extender starting test curve with small error fluctuation can be generated after discrete values are filtered, preparation is made for subsequently obtaining a torque signal to control the rise of the output torque of the generator, the accuracy of torque adjusting data is indirectly ensured, the service performance of the whole vehicle is indirectly improved, and the service life of the range extender is prolonged.

According to the scheme, the generator and the engine of the range extender are trained under different torques, a preset starting test curve of the range extender is obtained, preparation can be made for the follow-up increase of torque signal control generator output torque, the accuracy of torque adjustment data is indirectly guaranteed, the use performance of the whole vehicle is indirectly improved, and the service life of the range extender is prolonged.

Further, fig. 6 is a schematic flow chart of a fifth embodiment of the vehicle range extender starting method according to the present invention, and as shown in fig. 6, the fifth embodiment of the vehicle range extender starting method according to the present invention is proposed based on the first embodiment, in this embodiment, the step S20 specifically includes the following steps:

and S21, detecting the starting rotating speed and the current oil pressure of the engine in real time, wherein the starting rotating speed is less than the preset starting rotating speed, and when the current oil pressure is more than or equal to the preset oil pressure, the engine is determined to be driven by the generator to start in a gentle slope within the preset interval time.

It should be noted that the current oil pressure is the real-time oil pressure of the transmitter, the starting speed is the real-time speed of the engine, the preset starting speed is a preset engine speed threshold value, the starting speed is smaller than the preset starting speed, and when the current oil pressure is larger than or equal to the preset oil pressure, the gentle slope starting opportunity which is a better condition at the moment can be determined, the abrasion risk of a crankshaft bearing bush caused by insufficient lubrication in the starting process of the range extender can be avoided after the oil pressure is established, the engine can be driven by the generator within the preset interval time to start the gentle slope of the engine, and the response time for controlling the generator to drive the engine to start the gentle slope of the generator controller is preset in the interval.

In specific implementation, the generator may be controlled to drive the engine to start in a gentle slope when the engine start-up rotation speed is within a preset start-up rotation speed of 300rpm, that is, the engine start-up rotation speed is within 300rpm, the preset interval time may be set to be greater than 0.3 second, and the preset start-up rotation speed and the preset interval time may be set to other values, which is not limited in this embodiment.

And step S22, when the starting rotating speed is greater than or equal to a preset starting rotating speed, determining that the engine is not driven by the generator to start in a gentle slope.

It can be understood that when the starting rotating speed is greater than or equal to the preset starting rotating speed, the rotating speed of the engine is already up at the moment, and the generator is not required to drive the engine to start in a gentle slope.

According to the scheme, the starting rotating speed and the current oil pressure of the engine are detected in real time, and when the starting rotating speed is smaller than the preset starting rotating speed and the current oil pressure is larger than or equal to the preset oil pressure, the engine is determined to be driven by the generator to start in a gentle slope within the preset interval time; when the starting rotating speed is greater than or equal to the preset starting rotating speed, the engine is determined not to be driven by the generator to start in a gentle slope mode, the risk of abrasion of a crankshaft bearing bush in the starting process of the range extender can be avoided, the slipping risk of the torque-limiting shock absorber is avoided, the service performance of the whole vehicle is improved, and the service life of the range extender is prolonged.

Further, fig. 7 is a flowchart illustrating a sixth embodiment of a vehicle range extender starting method according to the present invention, and as shown in fig. 7, the sixth embodiment of the vehicle range extender starting method according to the present invention is proposed based on the first embodiment, in this embodiment, the step S30 specifically includes the following steps:

and step S31, obtaining peak torque from the preset range extender starting test curve, and generating a tail section torque signal of the generator controller according to the peak torque.

It should be noted that the peak torque is a peak value of a torque curve in the preset range extender starting test curve, and generally, different peak torques are corresponding to different power values of different vehicles, and a tail section torque signal of the generator controller is generated through the peak torque.

And step S32, controlling the output torque of the generator to accelerate and rise according to the tail section torque signal and a second preset rising frequency, wherein the second preset rising frequency is higher than the first preset rising frequency.

It can be understood that the second preset rising frequency is a frequency of a rising potential head for determining the continuous rise of the torque, the output torque of the generator can be rapidly controlled to rise by combining the tail section torque signal through the second preset rising frequency, and the second preset rising frequency is higher than the first preset rising frequency, namely the tail section torque signal is output by the generator controller, so that the torque of the output end of the generator is rapidly raised.

According to the scheme, the peak torque is obtained from the preset range extender starting test curve, and the tail section torque signal of the generator controller is generated according to the peak torque; according to the tail section torque signal and the second preset rising frequency, the output torque of the generator is controlled to rise in an accelerating mode, the second preset rising frequency is higher than the first preset rising frequency, the rotation speed fluctuation of the generator and the torque limiting damper due to the fact that the starting time is prolonged can be avoided, the NVH performance is improved, and the use performance of the whole vehicle is improved.

Further, fig. 8 is a schematic flowchart of a seventh embodiment of the vehicle range extender starting method according to the present invention, and as shown in fig. 8, the seventh embodiment of the vehicle range extender starting method according to the present invention is proposed based on the first embodiment, and in this embodiment, after the step S30, the vehicle range extender starting method further includes the following steps:

and step S40, acquiring a tail section starting interval corresponding to the tail section torque signal, and controlling the generator and the engine to be coupled in a rotating speed mode in the tail section starting interval.

It is understood that the tail section torque signal corresponds to a tail section start section, so that the generator is controlled to be coupled with the engine in a rotating speed mode in the tail section start section.

In the specific implementation, the generator at the tail section of the starting interval is quickly coupled with the rotating speed of the engine, so that the periodic fluctuation of the torque-limiting shock absorber caused by the exchange of the rotating speeds of the generator and the engine is avoided, and starting noise is caused; the tail section starting interval can be generally controlled to be about 0.6 second, and the tail section is pulled up quickly through the slow starting of the front section to meet the starting performance and NVH requirements of the range extender.

According to the scheme, the generator is controlled in the tail section starting interval through acquiring the tail section torque signal corresponding tail section starting interval, the generator is coupled with the engine in a rotating speed mode, the risk of abrasion of a crankshaft bearing bush in the starting process of the range extender is avoided, the slipping risk of the torque-limiting shock absorber is avoided, the service performance of the whole vehicle is improved, the service life of the range extender is prolonged, and the NVH performance is improved.

Correspondingly, the invention further provides a starting device of the vehicle range extender.

Referring to fig. 9, fig. 9 is a functional block diagram of a first embodiment of a vehicle range extender starting device of the present invention.

In a first embodiment of the vehicle range extender starting device of the present invention, the vehicle range extender starting device includes:

and the initial torque adjusting module 10 is used for acquiring an initial torque signal of the generator controller and adjusting the output torque of the generator according to the initial torque signal.

And the starting module 20 is used for detecting the starting rotating speed of the engine in real time and determining whether the engine is driven by the generator to start in a gentle slope mode according to the starting rotating speed.

And the tail section torque adjusting module 30 is configured to obtain a tail section torque signal of the generator controller, and adjust the output torque of the generator according to the tail section torque signal.

The initial torque adjusting module 10 is further configured to obtain an initial torque from a preset starting test curve of the range extender, generate an initial torque signal according to the initial torque, and control the output torque of the generator to rise at a constant speed according to the initial torque signal.

The initial-stage torque adjusting module 10 is further configured to obtain an initial-stage torque corresponding to the target starting rotation speed from a preset range extender starting test curve; and generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal and a first preset rising frequency.

The initial-stage torque adjusting module 10 is further used for training a generator and an engine of the range extender under different torques to obtain a preset starting test curve of the range extender.

The starting module 20 is further configured to detect a starting rotation speed and a current oil pressure of the engine in real time, and determine that the engine is driven by the generator to start in a gentle slope within a preset interval time when the starting rotation speed is less than a preset starting rotation speed and the current oil pressure is greater than or equal to the preset oil pressure; and when the starting rotating speed is greater than or equal to a preset starting rotating speed, determining that the engine is not driven by the generator to start in a gentle slope.

The tail section torque adjusting module 30 is further configured to obtain a peak torque from the preset range extender starting test curve, and generate a tail section torque signal of the generator controller according to the peak torque; and controlling the output torque of the generator to accelerate and rise according to the tail section torque signal and a second preset rising frequency, wherein the second preset rising frequency is higher than the first preset rising frequency.

The tail section torque adjusting module 30 is further configured to obtain a tail section starting interval corresponding to the tail section torque signal, and control the generator and the engine to perform rotational speed coupling in the tail section starting interval.

The steps implemented by the functional modules of the vehicle range extender starting device can refer to the embodiments of the vehicle range extender starting method, and are not described herein again.

In addition, an embodiment of the present invention further provides a storage medium, where a vehicle range extender starting program is stored on the storage medium, and when executed by a processor, the vehicle range extender starting program implements the following operations:

acquiring an initial section torque signal of a generator controller, and adjusting the output torque of a generator according to the initial section torque signal;

detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed;

and acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal.

Further, the vehicle range extender starting program when executed by the processor further realizes the following operations:

the method comprises the steps of obtaining initial torque from a preset starting test curve of a range extender, generating an initial torque signal according to the initial torque, and controlling the output torque of a generator to rise at a constant speed according to the initial torque signal.

Further, the vehicle range extender starting program when executed by the processor further realizes the following operations:

obtaining an initial section torque corresponding to a target starting rotating speed from a preset range extender starting test curve;

and generating an initial torque signal according to the initial torque, and controlling the output torque of the generator to rise at a constant speed according to the initial torque signal and a first preset rising frequency.

Further, the vehicle range extender starting program when executed by the processor further realizes the following operations:

training a generator and an engine of the range extender under different torques to obtain a preset starting test curve of the range extender.

Further, the vehicle range extender starting program when executed by the processor further realizes the following operations:

detecting the starting rotating speed and the current oil pressure of the engine in real time, and determining that the engine is driven by the generator to start in a gentle slope within a preset interval time when the starting rotating speed is less than a preset starting rotating speed and the current oil pressure is greater than or equal to a preset oil pressure;

and when the starting rotating speed is greater than or equal to a preset starting rotating speed, determining that the engine is not driven by the generator to start in a gentle slope.

Further, the vehicle range extender starting program when executed by the processor further realizes the following operations:

obtaining a peak torque from the preset range extender starting test curve, and generating a tail section torque signal of the generator controller according to the peak torque;

and controlling the output torque of the generator to accelerate and rise according to the tail section torque signal and a second preset rising frequency, wherein the second preset rising frequency is higher than the first preset rising frequency.

Further, the vehicle range extender starting program when executed by the processor further realizes the following operations:

and acquiring a tail section starting interval corresponding to the tail section torque signal, and controlling the generator and the engine to carry out rotating speed coupling in the tail section starting interval.

According to the scheme, the output torque of the generator is adjusted according to the initial torque signal by acquiring the initial torque signal of the generator controller; detecting the starting rotating speed of an engine in real time, and determining whether the engine is driven by the generator to start in a gentle slope mode or not according to the starting rotating speed; acquiring a tail section torque signal of the generator controller, and adjusting the output torque of the generator according to the tail section torque signal; the wear risk of a crankshaft bearing bush in the starting process of the range extender can be avoided, the slipping risk of the torque-limiting shock absorber is avoided, the use performance of the whole vehicle is improved, the service life of the range extender is prolonged, and the NVH performance is improved.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. 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 system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.