阅读说明：本技术 电子真空泵控制方法、装置、系统及机器可读存储介质 (Electronic vacuum pump control method, device, system and machine readable storage medium ) 是由 崔帅 范琦辉 赵勇智 张春广 蒋鹏宇 王娟军 宋立松 郝之凯 郜增达 孙玉 徐波 于 2018-06-28 设计创作，主要内容包括：本发明涉及车辆技术领域,提供一种电子真空泵控制方法、装置、系统及机器可读存储介质。所述电子真空泵控制方法包括：实时获取电子真空泵的真空度信号；当真空度信号低于预设开启值时,控制电子真空泵开始工作,并实时记录电子真空泵的持续工作时间；当真空度信号未达到预设关闭值,且持续工作时间达到预设安全时间时,判断是否存在踏板行程信号,若是则控制电子真空泵持续工作,并判断持续工作时间是否达到预设预警时间,否则控制电子真空泵进入第一间歇工作状态；以及当持续工作时间达到预设预警时间时,控制电子真空泵进入第二间歇工作状态。本发明减小了对电子真空泵本身的过载工作能力的过度依靠,提升了整车制动性能的主动安全性。(The invention relates to the technical field of vehicles, and provides an electronic vacuum pump control method, device and system and a machine readable storage medium. The electronic vacuum pump control method comprises the following steps: acquiring a vacuum degree signal of the electronic vacuum pump in real time; when the vacuum degree signal is lower than a preset opening value, controlling the electronic vacuum pump to start working, and recording the continuous working time of the electronic vacuum pump in real time; when the vacuum degree signal does not reach a preset closing value and the continuous working time reaches a preset safety time, judging whether a pedal stroke signal exists or not, if so, controlling the electronic vacuum pump to continuously work, judging whether the continuous working time reaches a preset early warning time or not, and otherwise, controlling the electronic vacuum pump to enter a first intermittent working state; and controlling the electronic vacuum pump to enter a second intermittent working state when the continuous working time reaches the preset early warning time. The invention reduces the excessive dependence on the overload working capacity of the electronic vacuum pump and improves the active safety of the braking performance of the whole vehicle.)

1. An electronic vacuum pump control method, characterized by comprising:

acquiring a vacuum degree signal of the electronic vacuum pump in real time;

when the vacuum degree signal is lower than a preset opening value of the electronic vacuum pump, controlling the electronic vacuum pump to start working, and recording the continuous working time of the electronic vacuum pump in real time;

when the vacuum degree signal does not reach a preset closing value of the electronic vacuum pump and the continuous working time reaches a preset safety time, judging whether a pedal stroke signal exists or not, if so, controlling the electronic vacuum pump to continuously work, judging whether the continuous working time reaches a preset early warning time or not, and otherwise, controlling the electronic vacuum pump to enter a first intermittent working state; and

and when the continuous working time reaches the preset early warning time, controlling the electronic vacuum pump to enter a second intermittent working state.

2. The electronic vacuum pump control method according to claim 1, further comprising:

and when the electronic vacuum pump enters the first intermittent working state or the second intermittent working state, controlling the electronic vacuum pump to perform self-checking.

3. A method of controlling an electronic vacuum pump according to claim 2, wherein the controlling the electronic vacuum pump to perform self-testing comprises:

setting the pedal stroke to be 0, if the electronic vacuum pump works, judging whether a vacuum degree signal meets a preset closing value of the electronic vacuum pump or whether the interval preset self-checking times reach the preset closing value of the electronic vacuum pump within set time, if so, recording a current fault code as a historical fault code, otherwise, recording the current fault code, and controlling a vehicle instrument to perform brake fault alarm.

4. The electronic vacuum pump control method according to claim 1, further comprising:

and before the continuous working time reaches the preset early warning time, if the vacuum degree signal reaches a preset closing value of the electronic vacuum pump, controlling the electronic vacuum pump to stop working.

5. A machine-readable storage medium having stored thereon instructions for causing a controller to execute the electronic vacuum pump control method of any of claims 1 to 4.

6. An electronic vacuum pump control apparatus, characterized by comprising:

the acquisition module is used for acquiring a vacuum degree signal of the electronic vacuum pump in real time;

the first control module is used for controlling the electronic vacuum pump to start working and recording the continuous working time of the electronic vacuum pump in real time when the vacuum degree signal is lower than a preset starting value of the electronic vacuum pump;

the second control module is used for judging whether a pedal stroke signal exists or not when the vacuum degree signal does not reach a preset closing value of the electronic vacuum pump and the continuous working time reaches preset safety time, if so, controlling the electronic vacuum pump to continuously work, judging whether the continuous working time reaches preset early warning time or not, and otherwise, controlling the electronic vacuum pump to enter a first intermittent working state; and

and the third control module is used for controlling the electronic vacuum pump to enter a second intermittent working state when the continuous working time reaches the preset early warning time.

7. The electronic vacuum pump control device of claim 6, further comprising:

and the self-checking module is started by the corresponding second control module or the third control module when the electronic vacuum pump enters the first intermittent working state or the second intermittent working state and is used for controlling the electronic vacuum pump to perform self-checking.

8. The electronic vacuum pump control device of claim 7, wherein the self-test module is configured to control the electronic vacuum pump to perform self-test, and comprises:

setting the pedal stroke to be 0, if the electronic vacuum pump works, judging whether a vacuum degree signal meets a preset closing value of the electronic vacuum pump or whether the interval preset self-checking times reach the preset closing value of the electronic vacuum pump within set time, if so, recording a current fault code as a historical fault code, otherwise, recording the current fault code, and controlling a vehicle instrument to perform brake fault alarm.

9. The electronic vacuum pump control of claim 6, wherein the first control module and the second control module are further configured to:

and when the vacuum degree signal reaches a preset closing value of the electronic vacuum pump, controlling the electronic vacuum pump to stop working.

10. An electronic vacuum pump control system, comprising:

an electronic vacuum pump;

the vacuum booster is connected with the electronic vacuum pump through a vacuum pipeline and is also connected with a brake pedal so as to provide boosting force for the brake pedal;

the vacuum degree sensor is matched with the vacuum booster for mounting and is used for acquiring a vacuum degree signal of the electronic vacuum pump;

the pedal stroke sensor is matched with the brake pedal and used for acquiring pedal stroke signals; and

the electronic vacuum pump control device according to any one of claims 6 to 9, electrically connected to the electronic vacuum pump, the vacuum degree sensor, and the pedal stroke sensor, for controlling the electronic vacuum pump according to the vacuum degree signal and the pedal stroke signal.

Technical Field

The present invention relates to the field of vehicle technologies, and in particular, to a method, an apparatus, a system, and a machine-readable storage medium for controlling an electronic vacuum pump.

Background

With the increasingly tense world energy demand, automobiles pay more attention to the problem of reducing oil consumption, and at present, national policies favor new energy automobiles, and compared with traditional automobiles, the braking technology in a pure electric mode is a great advantage well favored by users. At present, more and more new energy automobiles use a blade type electronic vacuum pump as a vacuum source of a braking system, so that the requirement on the reliability of the electronic vacuum pump on the whole automobile is very high, and therefore, the electronic vacuum pump is protected, and the driving safety can be effectively guaranteed.

Disclosure of Invention

In view of the above, the present invention is directed to a method for controlling an electronic vacuum pump, so as to at least partially solve the above technical problems.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an electronic vacuum pump control method, comprising: acquiring a vacuum degree signal of the electronic vacuum pump in real time; when the vacuum degree signal is lower than a preset opening value of the electronic vacuum pump, controlling the electronic vacuum pump to start working, and recording the continuous working time of the electronic vacuum pump in real time; when the vacuum degree signal does not reach a preset closing value of the electronic vacuum pump and the continuous working time reaches a preset safety time, judging whether a pedal stroke signal exists or not, if so, controlling the electronic vacuum pump to continuously work, judging whether the continuous working time reaches a preset early warning time or not, and otherwise, controlling the electronic vacuum pump to enter a first intermittent working state; and when the continuous working time reaches the preset early warning time, controlling the electronic vacuum pump to enter a second intermittent working state.

Further, the electronic vacuum pump control method further includes: and when the electronic vacuum pump enters the first intermittent working state or the second intermittent working state, controlling the electronic vacuum pump to perform self-checking.

Further, the controlling the electronic vacuum pump to perform self-test includes: setting the pedal stroke to be 0, if the electronic vacuum pump works, judging whether a vacuum degree signal meets a preset closing value of the electronic vacuum pump or whether the interval preset self-checking times reach the preset closing value of the electronic vacuum pump within set time, if so, recording a current fault code as a historical fault code, otherwise, recording the current fault code, and controlling a vehicle instrument to perform brake fault alarm.

Further, the electronic vacuum pump control method further includes: and before the continuous working time reaches the preset early warning time, if the vacuum degree signal reaches a preset closing value of the electronic vacuum pump, controlling the electronic vacuum pump to stop working.

Compared with the prior art, the control method of the electronic vacuum pump has the following advantages: the electronic vacuum pump control method is suitable for electric vehicle types or traditional vehicle types using the electronic vacuum pump, and reduces the excessive dependence on the overload working capacity of the electronic vacuum pump by adding the electronic vacuum pump protection strategy mode, so that the mode of actively protecting the electronic vacuum pump from the strategy improves the active safety of the braking performance of the whole vehicle.

Another object of the present invention is to propose a machine readable storage medium to at least partially solve the above technical problem.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a machine-readable storage medium having stored thereon instructions for causing a controller to execute the above-described electronic vacuum pump control method.

The machine-readable storage medium has the same advantages as the above-mentioned electronic vacuum pump control method over the prior art, and is not described herein again.

Another object of the present invention is to provide an electronic vacuum pump control device to at least partially solve the above technical problems.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an electronic vacuum pump control device comprising: the acquisition module is used for acquiring a vacuum degree signal of the electronic vacuum pump in real time; the first control module is used for controlling the electronic vacuum pump to start working and recording the continuous working time of the electronic vacuum pump in real time when the vacuum degree signal is lower than a preset starting value of the electronic vacuum pump; the second control module is used for judging whether a pedal stroke signal exists or not when the vacuum degree signal does not reach a preset closing value of the electronic vacuum pump and the continuous working time reaches preset safety time, if so, controlling the electronic vacuum pump to continuously work, judging whether the continuous working time reaches preset early warning time or not, and otherwise, controlling the electronic vacuum pump to enter a first intermittent working state; and the third control module is used for controlling the electronic vacuum pump to enter a second intermittent working state when the continuous working time reaches the preset early warning time.

Further, the electronic vacuum pump control device further includes: and the self-checking module is started by the corresponding second control module or the third control module when the electronic vacuum pump enters the first intermittent working state or the second intermittent working state and is used for controlling the electronic vacuum pump to perform self-checking.

Further, the self-test module is used for controlling the electronic vacuum pump to perform self-test and includes: setting the pedal stroke to be 0, if the electronic vacuum pump works, judging whether a vacuum degree signal meets a preset closing value of the electronic vacuum pump or whether the interval preset self-checking times reach the preset closing value of the electronic vacuum pump within set time, if so, recording a current fault code as a historical fault code, otherwise, recording the current fault code, and controlling a vehicle instrument to perform brake fault alarm.

Further, the first control module and the second control module are further configured to: and when the vacuum degree signal reaches a preset closing value of the electronic vacuum pump, controlling the electronic vacuum pump to stop working.

Compared with the prior art, the electronic vacuum pump control device and the electronic vacuum pump control method have the same advantages, and are not repeated herein.

Another object of the present invention is to propose an electronic vacuum pump control system to at least partially solve the above technical problem.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an electronic vacuum pump control system comprising: an electronic vacuum pump; the vacuum booster is connected with the electronic vacuum pump through a vacuum pipeline and is also connected with a brake pedal so as to provide boosting force for the brake pedal; the vacuum degree sensor is matched with the vacuum booster for mounting and is used for acquiring a vacuum degree signal of the electronic vacuum pump; the pedal stroke sensor is matched with the brake pedal and used for acquiring pedal stroke signals; and the electronic vacuum pump control device is electrically connected with the electronic vacuum pump, the vacuum degree sensor and the pedal stroke sensor and is used for controlling the electronic vacuum pump according to the vacuum degree signal and the pedal stroke signal.

Compared with the prior art, the electronic vacuum pump control system and the electronic vacuum pump control method have the same advantages, and are not repeated herein.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic flow chart of a method for controlling an electronic vacuum pump according to an embodiment of the present invention;

FIG. 2 is a simplified control schematic of an electronic vacuum pump control method of an embodiment of the present invention;

3A-3C are schematic diagrams of the working principle of an electronic vacuum pump using the control method of the electronic vacuum pump according to the embodiment of the present invention, which includes three different working conditions, namely a normal working region, a first strategy protection region and a second strategy protection region;

FIG. 4 is a schematic structural view of an electronic vacuum pump control apparatus according to an embodiment of the present invention; and

fig. 5 is a schematic structural diagram of an electronic vacuum pump control system according to an embodiment of the present invention.

Description of reference numerals:

410. an acquisition module; 420. A first control module;

430. a second control module; 440. A third control module;

450. a self-checking module; 510. An electronic vacuum pump;

520. a vacuum booster; 530. A brake pedal;

540. a vacuum degree sensor; 550. A pedal stroke sensor;

560. an electronic vacuum pump control device.

Detailed Description

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

In embodiments of the present invention, "electrically connected" is used to describe signal connections, such as control signals and feedback signals, between two components, as well as electrical power connections between two components. In addition, the "connection" related in the embodiments of the present invention may be a wired connection, a wireless connection, or a mechanical connection, and the "electrical connection" related in the embodiments of the present invention may be a direct electrical connection between two components, or an indirect electrical connection through other components.

In addition, in the embodiment of the present invention, the vacuum degree signal is a negative pressure value, for example, the preset opening value of the electronic vacuum pump is-50 kpa, the preset closing value of the electronic vacuum pump is-60 kpa, and the absolute value of the vacuum degree signal is compared with the actual value of the vacuum degree signal when the vacuum degree signal is compared.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 is a schematic flow chart of a method for controlling an electronic vacuum pump according to an embodiment of the present invention. As shown in fig. 1, the electronic vacuum pump control method may include the steps of:

and S110, acquiring a vacuum degree signal of the electronic vacuum pump in real time.

For example, a vacuum signal of the electronic vacuum pump may be collected by a sensor.

And S120, when the vacuum degree signal is lower than a preset starting value of the electronic vacuum pump, controlling the electronic vacuum pump to start working, and recording the continuous working time of the electronic vacuum pump in real time.

For example, the preset starting value of the electronic vacuum pump is P1, which can be set empirically, for example, P1 is set to-50 kpa, and when the absolute value of the detected vacuum signal is lower than 50 (for example, the actual value is-48 kpa), the electronic vacuum pump starts to operate.

In addition, under the pure electric mode of the new energy automobile, the on-off of the electronic vacuum pump can be controlled through the relay, and the relay can accumulate the continuous working time of the electronic vacuum pump.

It should be noted that, when the vacuum degree signal is lower than the preset opening value of the electronic vacuum pump, the electronic vacuum pump starts to operate, and after the electronic vacuum pump starts to operate, the corresponding vacuum degree signal changes from a low negative pressure to a high negative pressure, for example, from-48 kpa to-60 kpa, during which the operation of the electronic vacuum pump is not affected by the preset opening value P1.

And S130, when the vacuum degree signal does not reach a preset closing value of the electronic vacuum pump and the continuous working time reaches preset safety time, judging whether a pedal stroke signal exists or not, if so, controlling the electronic vacuum pump to continuously work, judging whether the continuous working time reaches preset early warning time or not, and otherwise, controlling the electronic vacuum pump to enter a first intermittent working state.

The preset safe time refers to the safe time for the electronic vacuum pump to continuously work, which is preset according to experience, and if the preset safe time exceeds the safe time, the electronic vacuum pump may be overloaded, so that safety risks exist.

For example, if the preset off value of the electronic vacuum pump is P2 (for example, -60kpa), and the preset safe time is t1, the following strategy protection is performed on the electronic vacuum pump when the vacuum degree signal does not reach P2 and the continuous operation time of the electronic vacuum pump reaches t 1:

1) if the pedal stroke signal does not exist, indicating that the braking requirement is not needed temporarily, the electronic vacuum pump can be put into a first intermittent operation state to reduce the operation time, wherein the first intermittent operation state is for example that the operation time is t2, and the interval time is t 3.

2) If the pedal travel signal exists, the braking requirement is indicated, and the electronic vacuum pump is controlled to work continuously to ensure that enough vacuum assistance is provided for the brake pedal.

It can be known that, for the situation that the vacuum degree signal does not reach the preset closing value of the electronic vacuum pump and the continuous working time reaches the preset safe time, the control strategy of the embodiment of the invention is mainly carried out based on whether the pedal stroke signal is detected or not, and is irrelevant to the vacuum degree signal.

In addition, in this case, if the vacuum degree signal reaches the preset closing value of the electronic vacuum pump, the electronic vacuum pump should be controlled to stop working.

And step S140, controlling the electronic vacuum pump to enter a second intermittent working state when the continuous working time reaches the preset early warning time.

The preset early warning time refers to the early warning time of faults such as locked rotor, damage, pipeline leakage and the like which are possibly caused by the electronic vacuum pump which continuously works and is preset according to experience.

For example, if the preset warning time is t4, if the continuous operation time of the electronic vacuum pump is longer than t4, the electronic vacuum pump enters the intermittent operation state, i.e., the second intermittent operation state, regardless of whether the pedal stroke signal exists, where the second intermittent operation state is, for example, the operation time is t5 and the interval time is t 6.

The electronic vacuum pump can be maintained in the second intermittent operation state after the continuous operation time of the electronic vacuum pump exceeds t4, and the operation state is independent of the pedal stroke signal and the vacuum degree signal.

In addition, the second intermittent operating condition is associated with a failure of the electronic vacuum pump, and in fact, the first intermittent operating condition may be due to a failure of the electronic vacuum pump. Accordingly, the electronic vacuum pump control method according to an embodiment of the present invention may further include:

and step S150 (not shown in fig. 1), when the electronic vacuum pump enters the first intermittent operating state or the second intermittent operating state, controlling the electronic vacuum pump to perform self-test.

Specifically, controlling the electronic vacuum pump to perform self-checking may be performed after the entire vehicle is reinitialized, and may include: setting the pedal stroke to be 0, if the electronic vacuum pump works, judging whether a vacuum degree signal meets a preset closing value of the electronic vacuum pump or whether the interval preset self-checking times reach the preset closing value of the electronic vacuum pump within set time, if so, recording a current fault code as a historical fault code, otherwise, recording the current fault code, and controlling a vehicle instrument to perform brake fault alarm.

For example, the whole vehicle is reinitialized, self-checking is carried out through the controller, the pedal stroke is 0, if the electronic vacuum pump works and the vacuum degree signal t0 is detected to meet the preset closing value P2 within the time, the fault code is recorded as a historical fault code, the fault is automatically eliminated, and when the pedal is stepped on, the electronic vacuum pump works according to a normal working strategy; the pedal stroke is 0, if the electronic vacuum pump works, the closing value is not met within the time of detecting the vacuum degree signal t0 or the interval N times reaches the preset closing threshold value, the current fault code is recorded, and the instrument prompts the fault signal of the electronic vacuum pump so as to remind a driver and passengers of checking the vehicle condition. Wherein t0 is a set time corresponding to a preset closing value in the performance curve of the electronic vacuum pump, and N is a preset self-checking number of times of the controller.

In addition, the control of the vehicle instrument for brake failure alarm CAN be realized by transmitting an alarm signal through the CAN network, for example, voice reminding is carried out to remind a driver to carry out vehicle inspection.

Further, in combination with the above, with respect to step S120 and steps S130 to S140, in a preferred embodiment, the electronic vacuum pump control method may further include: and before the continuous working time reaches the preset early warning time, if the vacuum degree signal reaches a preset closing value of the electronic vacuum pump, controlling the electronic vacuum pump to stop working.

The embodiment of the present invention also provides a machine-readable storage medium, where the machine-readable storage medium has instructions stored thereon, and the instructions are used for causing a controller to execute the electronic vacuum pump control method described in the foregoing embodiment.

Accordingly, it can be seen that the embodiment of the present invention can implement the control of the electronic vacuum pump by using a controller, which is an independent controller such as a single chip microcomputer and a digital signal processor, or an ECU (electronic control Unit) of a vehicle. Taking the ECU as an example, it CAN obtain the vacuum degree signal and pedal travel signal of the vehicle through the entire vehicle CAN network.

Fig. 2 is a simplified control schematic diagram of an electronic vacuum pump control method according to an embodiment of the present invention, showing: after the whole vehicle is electrified and initialized, the controller detects the vacuum booster through the vacuum degree sensor to obtain a vacuum degree signal, detects the brake pedal through the pedal stroke sensor to obtain a pedal stroke signal, and then executes the steps of the electronic vacuum pump control method to control the electronic vacuum pump.

Fig. 3A to 3C are schematic diagrams illustrating the operation principle of the electronic vacuum pump using the control method of the electronic vacuum pump according to the embodiment of the present invention, which respectively correspond to three operation regions, that is: the system comprises a normal working area, a first strategy protection area and a second strategy protection area. These three operating regions will be described in detail below.

First, normal working area

Referring to fig. 3A, the normal operating region mainly includes the following steps:

and step S311, starting and initializing the whole vehicle.

After the whole vehicle is started and initialized, the electronic vacuum pump and the like can be subjected to self-checking so as to ensure normal operation of the electronic vacuum pump and the like.

In step S312, the pedal stroke sensor detects a pedal stroke signal.

In step S313, the vacuum sensor detects a vacuum signal.

In step S314, the controller receives the pedal stroke signal and the vacuum degree signal.

And step S315, controlling the electronic vacuum pump to start working when the vacuum degree signal is lower than a preset opening value P1.

In step S316, it is determined whether the vacuum signal reaches a preset closing value P2, if so, step S317 is executed, otherwise, step S318 is executed.

And step S317, controlling the electronic vacuum pump to stop working.

And step S318, the electronic vacuum pump continues to work and enters a first strategy protection area.

Second, first policy protection zone

Referring to fig. 3B, the first policy protection zone mainly includes the following steps:

step S321, receiving the working condition of the normal working area, and determining whether the continuous working time of the electronic vacuum pump exceeds the preset safe time t1, if so, performing step S322, otherwise, controlling the electronic vacuum pump to continue working.

In step S322, it is determined whether there is a pedal stroke signal, if yes, step S323 is executed, otherwise, step S324 is executed.

And step S323, the electronic vacuum pump continues to work, if the vacuum degree signal reaches P2, the electronic vacuum pump stops working, otherwise, the electronic vacuum pump enters a second strategy protection area.

And step S324, controlling the electronic vacuum pump to enter an intermittent working state and carrying out self-checking.

In the intermittent operation state, for example, the operation time is t2, and the interval time is t3, regardless of the vacuum level signal. In addition, at this time, the user does not step on the pedal (no pedal stroke signal), and the continuous working time of the electronic vacuum pump exceeds t1, which indicates that the electronic vacuum pump continues to work in an unsafe working state without a braking requirement, so that the electronic vacuum pump is likely to have a fault such as pipeline leakage, and can be subjected to self-checking. The self-checking step is as described above and will not be described herein again.

Third, second strategy protection area

Referring to fig. 3C, the second policy protection zone mainly includes the following steps:

and step S331, receiving the working condition of the first strategy protection area, judging whether the continuous working time of the electronic vacuum pump exceeds the preset early warning time t4, if so, executing step S332, otherwise, controlling the electronic vacuum pump to continuously work in the first strategy protection area.

Wherein t4> t 1.

And step S332, controlling the electronic vacuum pump to enter an intermittent working state and carrying out self-checking.

The self-checking process can refer to the above, and is not described herein again.

In the second strategy protection area, the controller receives the pedal stroke signal and the vacuum degree signal, but the electronic vacuum pump enters an intermittent operation state no matter the pedal stroke signal exists or does not exist, the operation time can be preset to be t5, the interval time is t6, and the operation time is not related to the vacuum degree signal.

In the embodiment of the invention, the sizes of the P1, the P2, the t1-t6 and the like can be determined according to the parameter configuration of the electronic vacuum pump obtained by a manufacturer of the electronic vacuum pump through a current surge experiment and the like.

In summary, the electronic vacuum pump control method provided by the embodiment of the invention is suitable for electric vehicle types or traditional vehicle types using the electronic vacuum pump, and excessive dependence on overload working capacity of the electronic vacuum pump is reduced by adding an electronic vacuum pump protection strategy mode, so that the mode of actively protecting the electronic vacuum pump is added from the strategy, and the active safety of the braking performance of the whole vehicle is improved.

Based on the same invention idea, the embodiment of the invention also provides an electronic vacuum pump control device.

Fig. 4 is a schematic structural view of an electronic vacuum pump control device according to an embodiment of the present invention. As shown in fig. 4, the electronic vacuum pump control apparatus may include: an obtaining module 410, configured to obtain a vacuum degree signal of the electronic vacuum pump in real time; the first control module 420 is used for controlling the electronic vacuum pump to start working and recording the continuous working time of the electronic vacuum pump in real time when the vacuum degree signal is lower than a preset starting value of the electronic vacuum pump; the second control module 430 is configured to determine whether a pedal stroke signal exists when the vacuum degree signal does not reach a preset closing value of the electronic vacuum pump and the continuous working time reaches a preset safety time, control the electronic vacuum pump to continuously work if the pedal stroke signal exists, determine whether the continuous working time reaches a preset early warning time, and otherwise control the electronic vacuum pump to enter a first intermittent working state; and a third control module 440, configured to control the electronic vacuum pump to enter a second intermittent operating state when the continuous operating time reaches the preset early warning time.

In a preferred embodiment, the electronic vacuum pump control apparatus may further include: and a self-checking module 450, which is started by the corresponding second control module or the third control module when the electronic vacuum pump enters the first intermittent operating state or the second intermittent operating state, and is used for controlling the electronic vacuum pump to perform self-checking.

More preferably, the self-test module 450 is configured to control the electronic vacuum pump to perform self-test, and includes: setting the pedal stroke to be 0, if the electronic vacuum pump works, judging whether a vacuum degree signal meets a preset closing value of the electronic vacuum pump or whether the interval preset self-checking times reach the preset closing value of the electronic vacuum pump within set time, if so, recording a current fault code as a historical fault code, otherwise, recording the current fault code, and controlling a vehicle instrument to perform brake fault alarm.

More preferably, the first control module 420 and the second control module 430 are further configured to: and when the vacuum degree signal reaches a preset closing value of the electronic vacuum pump, controlling the electronic vacuum pump to stop working.

The electronic vacuum pump control device of the embodiment of the invention has the same or similar implementation details and effects as the above-mentioned embodiment related to the electronic vacuum pump control method, and is not repeated herein.

Fig. 5 is a schematic structural diagram of an electronic vacuum pump control system according to an embodiment of the present invention. As shown in fig. 5, the electronic vacuum pump control system may include: an electronic vacuum pump 510; a vacuum booster 520 connected to the electronic vacuum pump 510 through a vacuum line, and the vacuum booster 520 is further connected to a brake pedal 530 to provide boosting force to the brake pedal 530; a vacuum degree sensor 540 installed in cooperation with the vacuum booster 520 and used for acquiring a vacuum degree signal of the electronic vacuum pump 510; a pedal travel sensor 550 which is installed in cooperation with the brake pedal 530 and is used for acquiring a pedal travel signal; the electronic vacuum pump control unit 560 according to the above embodiments is electrically connected to the electronic vacuum pump 510, the vacuum sensor 540, and the pedal stroke sensor 550, and is configured to control the electronic vacuum pump according to the vacuum signal and the pedal stroke signal.

Wherein, a vacuum degree sensor 540 can be installed on the vacuum pipeline between the electronic vacuum pump 510 and the vacuum booster 520, and the vacuum degree signal of the electronic vacuum pump can also be understood as the vacuum degree signal in the vacuum booster 520. It should be noted that, besides the electronic vacuum pump 510, the electronic vacuum pump control system may further include another vacuum booster, and in this case, the corresponding vacuum signal should also include the vacuum signal provided by the other vacuum booster. In addition, the vacuum booster is mechanically connected to the brake pedal, for example, by a pin.

Here, for the electronic vacuum pump control device 560 to control the electronic vacuum pump according to the vacuum degree signal and the pedal stroke signal, reference may be made to the above-mentioned embodiments related to the control method of the electronic vacuum pump, and details thereof are not repeated herein.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements, etc., such as an adaptive change of the execution sequence of the steps, which are within the spirit and principle of the present invention, should be included in the protection scope of the present invention.

Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In addition, various different embodiments of the present invention may be combined arbitrarily, and as long as the idea of the embodiments of the present invention is not violated, the same should be regarded as the disclosure of the embodiments of the present invention.