阅读说明：本技术 一种电动汽车电子转向油泵的控制方法 (Control method of electronic steering oil pump of electric automobile ) 是由 谢小波 史磊 符萍 陈辉 武东洋 刘燕 陈厚吉 于 2020-12-01 设计创作，主要内容包括：本申请涉及一种电动汽车电子转向油泵的控制方法,包括如下步骤：在完成上高压步骤后,若电动汽车处于第一状态时,启动电子转向油泵；否则,不启动电子转向油泵；其中,第一状态为：电动汽车当前档位为非空挡状态,驻车制动为松开状态,且车速不小于设定速度。本申请将车辆上高压之后的情形分成需要行车和不需要行车,若电动汽车处于第一状态,说明驾驶员需要行车,此时启动电子转向油泵,保证车辆行驶过程中的正常转向助力功能；而当不处于第一状态,说明不需要行车,此时不启动电子转向油泵,从而可以降低电动汽车在车辆静止状态下上高压后整车的能耗,延长了电子转向油泵的使用寿命,同时避免电子转向油泵产生噪音,提高了乘坐舒适性。(The application relates to a control method of an electric automobile electronic steering oil pump, which comprises the following steps: after the high pressure step is finished, if the electric automobile is in a first state, starting an electronic steering oil pump; otherwise, the electronic steering oil pump is not started; wherein the first state is: the current gear of the electric automobile is in a non-neutral state, the parking brake is in a release state, and the speed of the electric automobile is not less than a set speed. The method divides the situation after the vehicle is subjected to high pressure into the situation of needing driving and the situation of not needing driving, if the electric vehicle is in a first state, the situation shows that a driver needs driving, and at the moment, the electronic steering oil pump is started to ensure the normal steering power-assisted function in the driving process of the vehicle; when the electric automobile is not in the first state, the electric automobile does not need to drive, and the electronic steering oil pump is not started at the moment, so that the energy consumption of the whole electric automobile after the electric automobile is subjected to high pressure in the static state of the automobile can be reduced, the service life of the electronic steering oil pump is prolonged, the electronic steering oil pump is prevented from generating noise, and the riding comfort is improved.)

1. A control method of an electric automobile electronic steering oil pump is characterized by comprising the following steps:

after the high pressure step is finished, if the electric automobile is in a first state, starting an electronic steering oil pump; otherwise, the electronic steering oil pump is not started;

wherein the first state is: the current gear of the electric automobile is in a non-neutral state, the parking brake is in a release state, and the speed of the electric automobile is not less than a set speed.

2. The control method of the electric vehicle electronic steering oil pump according to claim 1, wherein the starting of the electronic steering oil pump includes the steps of:

sending a closing instruction to the high-voltage distribution box;

the high-voltage distribution box executes the closing instruction to close the high-voltage loop of the electronic steering oil pump;

sending a starting instruction to an electronic steering oil pump controller;

and the electronic steering oil pump controller executes the starting instruction to start the electronic steering oil pump.

3. The control method of the electric vehicle electronic steering oil pump according to claim 2, characterized in that: the method also comprises the step of high-pressure pre-charging the electronic steering oil pump after closing the electronic steering oil pump high-pressure loop and before sending a starting command to an electronic steering oil pump controller.

4. The control method of the electric vehicle electronic steering oil pump according to claim 3, characterized in that: after the electronic steering oil pump high-pressure pre-charging is completed and before a starting command is sent to the electronic steering oil pump controller, the method further comprises the following steps:

the electronic steering oil pump controller carries out self-checking and generates a self-checking result;

if the self-checking result shows that the electronic steering oil pump and the electronic steering oil pump controller have no faults, sending a starting instruction to the electronic steering oil pump controller;

otherwise, the starting instruction is not sent to the electronic steering oil pump controller.

5. The control method of the electric vehicle electronic steering oil pump according to claim 2, characterized in that: and sending the closing instruction and the starting instruction through a CAN bus.

6. The control method of the electric vehicle electronic steering oil pump according to claim 1, characterized in that: the set speed is 0.

7. The control method of the electric vehicle electronic steering oil pump according to claim 1, wherein the step of raising the high pressure includes:

awakening the vehicle control unit, the high-voltage distribution box and the energy storage battery management system;

detecting whether a fault that the high voltage is not allowed to be increased exists;

if yes, no high voltage is applied;

otherwise, sending a high-voltage instruction to the high-voltage distribution box and the energy storage battery management system, and executing the high-voltage instruction by the high-voltage distribution box and the energy storage battery management system so as to finish high voltage application.

8. The control method of the electric vehicle electronic steering oil pump according to claim 7, characterized in that:

said high voltage step further comprises waking up the meter;

after the step of finishing the high voltage, the method also comprises the step of sending high voltage finishing information to the meter and displaying the information through the meter.

9. The control method of the electric vehicle electronic steering oil pump according to claim 1, characterized by further comprising, after the starting of the electronic steering oil pump:

judging whether the electric automobile is in a second state, wherein the second state is as follows: the current gear of the electric automobile is in a neutral gear state, and the parking brake is in a pull-up state;

if the electric automobile is in the second state, controlling the electronic steering oil pump to stop working;

and if the electric automobile is not in the second state, judging whether the electric automobile is in the second state again.

10. The method for controlling the electric steering oil pump of the electric vehicle according to claim 9, wherein before determining whether the electric vehicle is in the second state, the method further comprises: and acquiring the current gear state and the parking braking state of the electric automobile.

Technical Field

The application relates to the technical field of electric automobile control, in particular to a control method of an electric automobile electronic steering oil pump.

Background

At present, the new energy automobile industry develops rapidly, wherein the pure electric automobile industry develops more and more in a new day, and the production and sales volume of new energy products such as pure electric cars, passenger cars, trucks, special vehicles and the like are doubled.

In some related technologies, when a pure electric vehicle is in use, after a high pressure occurs when the vehicle is in a stationary state, it is common that the steering oil pump is always in a working state. On one hand, the power consumption of the whole vehicle is increased invisibly, and the endurance is reduced; on the other hand, the low-frequency noise generated when the steering oil pump works is more prominent in the static state of the vehicle, so that the riding comfort of a driver is reduced.

Disclosure of Invention

The embodiment of the application provides a control method of an electric automobile electronic steering oil pump, and aims to solve the problems that in the related art, the steering oil pump is always in a working state after high pressure feeding is finished, so that the power consumption of the whole automobile is increased, and the riding comfort is reduced.

The embodiment of the application provides a control method of an electric automobile electronic steering oil pump, which comprises the following steps:

after the high pressure step is finished, if the electric automobile is in a first state, starting an electronic steering oil pump; otherwise, the electronic steering oil pump is not started;

wherein the first state is: the current gear of the electric automobile is in a non-neutral state, the parking brake is in a release state, and the speed of the electric automobile is not less than a set speed.

In some embodiments, the starting of the electronic steering oil pump includes the steps of:

sending a closing instruction to the high-voltage distribution box;

the high-voltage distribution box executes the closing instruction to close the high-voltage loop of the electronic steering oil pump;

sending a starting instruction to an electronic steering oil pump controller;

and the electronic steering oil pump controller executes the starting instruction to start the electronic steering oil pump.

In some embodiments, after closing the electronic steering oil pump high pressure circuit and before sending a start command to the electronic steering oil pump controller, the method further comprises the step of pre-charging the electronic steering oil pump high pressure.

In some embodiments, after the electronic steering oil pump high-pressure pre-charging is completed and before the start command is sent to the electronic steering oil pump controller, the method further comprises the following steps:

the electronic steering oil pump controller carries out self-checking and generates a self-checking result;

if the self-checking result shows that the electronic steering oil pump and the electronic steering oil pump controller have no faults, sending a starting instruction to the electronic steering oil pump controller;

otherwise, the starting instruction is not sent to the electronic steering oil pump controller.

In some embodiments, the close command and the start command are sent over a CAN bus.

In some embodiments, the set speed is 0.

In some embodiments, the step of applying an upper pressure comprises:

awakening the vehicle control unit, the high-voltage distribution box and the energy storage battery management system;

detecting whether a fault that the high voltage is not allowed to be increased exists;

if yes, no high voltage is applied;

otherwise, sending a high-voltage instruction to the high-voltage distribution box and the energy storage battery management system, and executing the high-voltage instruction by the high-voltage distribution box and the energy storage battery management system so as to finish high voltage application.

In some embodiments, the high voltage step further comprises waking up a meter;

after the step of finishing the high voltage, the method also comprises the step of sending high voltage finishing information to the meter and displaying the information through the meter.

In some embodiments, after the starting the electronic steering oil pump, the method further comprises:

judging whether the electric automobile is in a second state, wherein the second state is as follows: the current gear of the electric automobile is in a neutral gear state, and the parking brake is in a pull-up state;

if the electric automobile is in the second state, controlling the electronic steering oil pump to stop working;

and if the electric automobile is not in the second state, judging whether the electric automobile is in the second state again.

In some embodiments, before determining whether the electric vehicle is in the second state, the method further includes: and acquiring the current gear state and the parking braking state of the electric automobile.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a control method of an electric automobile electronic steering oil pump, the situation after high pressure on a vehicle is divided into two situations, one situation needs to be driven after high pressure, the other situation does not need to be driven after high pressure, for example, an air conditioner or music is started under the static state of the vehicle, the situation is judged according to the current gear state, the parking braking state and the vehicle speed, if the current gear is in a non-neutral gear state, the parking braking is in a release state, and the vehicle speed is not less than a set speed, namely, the electric automobile is in a first state, the situation shows that a driver needs to drive the vehicle at the moment, the electronic steering oil pump is started, and the normal steering power-assisting function in the driving process of the; when the electric automobile is not in the first state, the electric automobile does not need to drive at the moment, and the electronic steering oil pump is not started at the moment, so that the energy consumption of the whole electric automobile after the electric automobile is subjected to high pressure in the static state of the automobile can be reduced, the service life of the electronic steering oil pump is prolonged, the electronic steering oil pump is prevented from generating noise, and the riding comfort of a driver is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flowchart of a control method for an electric steering oil pump of an electric vehicle according to an embodiment of the present application;

fig. 2 is a flowchart of a self-checking procedure for faults provided in the embodiment of the present application;

fig. 3 is a flowchart of an upper pressure step provided in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a control method of an electric automobile electronic steering oil pump, which can solve the problems that in the related art, the power consumption of the whole automobile is increased and the riding comfort is reduced because the steering oil pump is always in a working state after high pressure is applied.

Referring to fig. 1, a method for controlling an electric steering oil pump of an electric vehicle includes the following steps:

101: after the high voltage step is completed, the vehicle control unit acquires the current gear state, the parking braking state and the vehicle speed of the electric vehicle and judges whether the electric vehicle is in a first state; wherein the first state is: the current gear of the electric automobile is in a non-neutral state, the parking brake is in a released state, the speed of the electric automobile is not less than a set speed, the set speed can be selected according to actual conditions, the set speed is greater than or equal to 0, and for example, the set speed can be set to 0, or 5km/h and the like.

102: and if the electric automobile is in the first state, starting the electronic steering oil pump.

103: and if the electric automobile is not in the first state, the electronic steering oil pump is not started.

According to the control method provided by the embodiment of the application, the situation after the vehicle is subjected to high pressure is divided into two situations, one situation is the situation that the vehicle needs to run after the vehicle is subjected to high pressure, and the other situation is the situation that the vehicle does not need to run after the vehicle is subjected to high pressure, such as starting an air conditioner or music and the like in a static state of the vehicle, and the situation is judged according to the current gear state, the parking brake state and the vehicle speed; when the electric automobile is not in the first state, the electric automobile does not need to drive at the moment, and the electronic steering oil pump is not started at the moment, so that the energy consumption of the whole electric automobile after the electric automobile is subjected to high pressure in the static state of the automobile can be reduced, the service life of the electronic steering oil pump is prolonged, the electronic steering oil pump is prevented from generating noise, and the riding comfort of a driver is improved.

In some preferred embodiments, activating the electronic steering oil pump comprises the steps of:

the vehicle control unit sends a closing instruction to the high-voltage distribution box, and the high-voltage distribution box executes the closing instruction to close the high-voltage loop of the electronic steering oil pump;

the vehicle control unit sends a starting instruction to the electronic steering oil pump controller, and the electronic steering oil pump controller executes the starting instruction to start the electronic steering oil pump, so that the driving requirement of the vehicle is met.

It should be noted that, when the electric vehicle is not in the first state, the vehicle control unit does not send a closing instruction to the high-voltage distribution box, and also does not send a starting instruction to the electronic steering oil pump controller, so that the electronic steering oil pump is not started.

In some preferred embodiments, after the electronic steering oil pump high-pressure loop is closed and before a starting command is sent to the electronic steering oil pump controller, the electronic steering oil pump high-pressure pre-charging step is further included, so that a surge current is prevented from being generated, and equipment damage is avoided.

Referring to fig. 2, in some preferred embodiments, after the electronic steering oil pump high-pressure pre-charging is completed and before a start command is sent to the electronic steering oil pump controller, the following fault self-checking steps are further included:

201: the electronic steering oil pump controller carries out self-checking and generates a self-checking result;

202: judging whether the self-checking result indicates that the electronic steering oil pump and the electronic steering oil pump controller have no fault;

203: if the self-checking result shows that the electronic steering oil pump and the electronic steering oil pump controller have no faults, sending a starting instruction to the electronic steering oil pump controller;

204: and if the self-checking result is that neither the electronic steering oil pump nor the electronic steering oil pump controller has faults, the starting instruction is not sent to the electronic steering oil pump controller.

In some preferred embodiments, the close command and the start command are sent over a CAN bus.

Referring to fig. 3, in some preferred embodiments, the step of applying high pressure comprises:

301: outputting a wake-up signal through an ignition lock to wake up the vehicle controller, the instrument, the high-voltage distribution box and the energy storage battery management system;

302: the vehicle controller detects vehicle information and judges whether a fault that high voltage is not allowed exists;

303: if yes, no high voltage is applied;

304: if the high-voltage command does not exist, the vehicle control unit sends a high-voltage command to the high-voltage distribution box and the energy storage battery management system, and the high-voltage distribution box and the energy storage battery management system execute the high-voltage command to finish high-voltage distribution.

305: and after the high voltage is applied, the vehicle control unit sends high voltage application completion information to the instrument through the CAN bus and displays the high voltage application completion information through the instrument.

In some preferred embodiments, after starting the electronic steering oil pump, the method further comprises:

the vehicle control unit acquires the current gear state and the parking braking state of the electric vehicle and judges whether the electric vehicle is in a second state, wherein the second state is as follows: the current gear of the electric automobile is in a neutral gear state, and the parking brake is in a pull-up state;

if the electric automobile is in the second state, the driver finishes the current driving operation at the moment, and may be a temporary stop, a rest or the like, and at the moment, the electronic steering oil pump is controlled to stop working, so that on one hand, the energy consumption of the whole electric automobile is reduced again, on the other hand, the electronic steering oil pump can be prevented from generating noise, and the riding comfort of the driver is improved;

and if the electric automobile is not in the second state, acquiring the current gear state and the parking braking state of the electric automobile again, and judging whether the electric automobile is in the second state.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.