A vacuum assist system control method and device, electronic equipment and storage medium

Abstract

The application provides a vacuum boosting system control method and device, electronic equipment and storage medium, and relates to the technical field of vehicle braking. During vehicle driving, if the vacuum degree of the vacuum boosting system is lower than the set vacuum degree threshold, the opening and closing states of the tank switch of the vacuum tank branch and the pump switch of the vacuum pump branch in the vacuum boosting system are controlled to determine the branch where the vacuum boosting system fails, and the vacuum degree of the vacuum boosting system is maintained, so that the braking effect is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile braking, and in particular relates to a vacuum assist system control method and device, an electronic device and a storage medium. BACKGROUND

[0002] With the rapid development of science and technology, automobiles have become common transportation tools in people's daily life, bringing great convenience to people's travel. Automobiles usually use a vacuum assist system for auxiliary braking to reduce the force of the driver on the brake pedal and improve the comfort and maneuverability of the automobile.

[0003] If the vacuum degree of the vacuum assist system continues to decrease, it may cause the automobile to brake failure, causing serious traffic accidents.

[0004] When the vacuum degree of the vacuum assist system decreases, how to ensure the braking effect is a problem to be solved. SUMMARY

[0005] In order to solve the above problems in the prior art, the embodiments of the present application provide a vacuum assist system control method, device, electronic device and storage medium, which can ensure the braking effect when the vacuum degree of the vacuum assist system decreases.

[0006] In a first aspect, the embodiments of the present application provide a vacuum assist system control method, which comprises:

[0007] In the process of vehicle driving, if the vacuum degree of the vacuum assist system is lower than a set vacuum degree threshold, a first switch is closed; the vacuum assist system is used for auxiliary braking of the vehicle; the first switch is a tank switch of a vacuum tank branch or a pump switch of a vacuum pump branch of the vacuum assist system;

[0008] If the vacuum degree of the vacuum assist system is maintained or increased after the first switch is closed, the closed state of the first switch is maintained;

[0009] If the vacuum degree of the vacuum assist system continues to decrease after the first switch is closed, the first switch is opened and a second switch is closed; the second switch is another switch except the first switch among the tank switch and the pump switch;

[0010] If the vacuum degree of the vacuum assist system is maintained or increased after the second switch is closed, the opened state of the first switch and the closed state of the second switch are maintained.

[0011] In a possible implementation, the method further comprises:

[0012] If the vacuum degree of the vacuum assist system continues to decrease after the second switch is closed, the vehicle speed is decreased.

[0013] In a possible implementation, the decreasing of the vehicle speed comprises:

[0014] According to the corresponding relationship between the vacuum degree of the vacuum assist system and the vehicle speed, the vehicle speed is decreased to a vehicle speed corresponding to the current vacuum degree.

[0015] In a possible implementation, when the vehicle speed is greater than or equal to the minimum protection vehicle speed, the corresponding relationship between the vacuum degree of the vacuum assist system and the vehicle speed is a positive proportional relationship.

[0016] In a possible implementation, the method further comprises:

[0017] If the vehicle is currently in a braking process and the current vehicle speed of the vehicle is less than the minimum protection vehicle speed, the monitoring of the vacuum degree of the vacuum assist system is stopped.

[0018] In a possible implementation, whether the vehicle is currently in a braking process is determined by:

[0019] The first opening degree signal and the second opening degree signal of the brake pedal of the vehicle are acquired; the first opening degree signal is an opening degree signal of the brake pedal at a time point before a current time point; and the second opening degree signal is an opening degree signal of the brake pedal at the current time point.

[0020] According to the first opening degree signal and the second opening degree signal, whether the vehicle is currently in a braking process is determined.

[0021] In a second aspect, an embodiment of the present application provides a vacuum assist system control device, and the device comprises:

[0022] A monitoring unit is configured to close a first switch if it is monitored that a vacuum degree of a vacuum assist system is lower than a set vacuum degree threshold during a vehicle driving process; the vacuum assist system is configured to assist vehicle braking; and the first switch is a tank switch of a vacuum tank branch or a pump switch of a vacuum pump branch of the vacuum assist system.

[0023] A control unit is configured to maintain a closed state of the first switch if the vacuum degree of the vacuum assist system is maintained or increased after the first switch is closed.

[0024] If the vacuum degree of the vacuum assist system continues to decrease after the first switch is closed, the first switch is opened, and a second switch is closed; the second switch is another switch except the first switch among the tank switch and the pump switch.

[0025] If the vacuum degree of the vacuum assist system is maintained or rises after the second switch is closed, the opening state of the first switch and the closing state of the second switch are maintained.

[0026] In a possible implementation, the control unit is further configured to:

[0027] If the vacuum degree of the vacuum assist system continues to drop after the second switch is closed, the vehicle speed is reduced.

[0028] In a third aspect, an electronic device is provided, including a memory and a processor, the memory storing a computer program capable of running on the processor, and when the computer program is executed by the processor, the method in any of the first aspect vacuum assist system control method is implemented.

[0029] In a fourth aspect, a computer readable storage medium is provided, the computer readable storage medium storing a computer program, and when the computer program is executed by a processor, the method in any of the first aspect vacuum assist system control method is implemented.

[0030] The vacuum assist system control method, device, electronic device and storage medium provided in the embodiments of the present application can close the first switch if it is monitored that the vacuum degree of the vacuum assist system is lower than the set vacuum degree threshold during vehicle driving, the first switch being a tank switch of a vacuum tank branch or a pump switch of a vacuum pump branch of the vacuum assist system. If the vacuum degree of the vacuum assist system is maintained or rises after the first switch is closed, it can be determined that the branch corresponding to the first switch leaks, and the closing state of the first switch can be maintained to maintain the vacuum degree of the vacuum assist system. If the vacuum degree of the vacuum assist system continues to drop after the first switch is closed, the first switch can be opened and the second switch can be closed; the second switch being another switch except the first switch among the tank switch and the pump switch, if the vacuum degree of the vacuum assist system continues to drop, it can be determined that the branch corresponding to the second switch leaks, and the opening state of the first switch and the closing state of the second switch can be maintained to maintain the vacuum degree of the vacuum assist system. By controlling the opening and closing states of the first switch and the second switch, the leaking branch of the vacuum assist system can be determined, and the vacuum degree of the vacuum assist system can be maintained, so that the braking effect is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Figure 1 This is a schematic diagram of the structure of a vacuum assist system provided in an embodiment of this application;

[0033] Figure 2 A flowchart of a vacuum assist system control method provided in this application embodiment;

[0034] Figure 3 A schematic diagram illustrating the relationship between vacuum level and vehicle speed, provided for an embodiment of this application;

[0035] Figure 4 A schematic diagram illustrating another relationship between vacuum level and vehicle speed, provided for an embodiment of this application;

[0036] Figure 5 A flowchart of another vacuum assist system control method provided in the embodiments of this application;

[0037] Figure 6 A schematic diagram of a vacuum assist system control method device provided in this application embodiment;

[0038] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] It should be noted that the terms "comprising" and "having" and their variations used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0041] With the rapid development of technology, automobiles have become a common means of transportation in people's daily lives, bringing great convenience to their travels. Automobiles typically use a vacuum booster system for auxiliary braking, reducing the force the driver exerts on the brake pedal and improving the vehicle's comfort and handling. If the vacuum level of the vacuum booster system continues to decrease, it may lead to brake failure, causing serious traffic accidents.

[0042] Based on this, this application provides a vacuum booster system control method. By controlling the opening and closing states of the tank switch of the vacuum tank branch and the pump switch of the vacuum pump branch in the vacuum booster system, the branch in which the vacuum booster system has a fault can be determined and the vacuum level of the vacuum booster system can be maintained to ensure the braking effect.

[0043] To further illustrate the technical solutions provided in the embodiments of this application, a detailed description is provided below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiments of this application provide method operation steps as shown in the following embodiments or drawings, the method may include more or fewer operation steps based on conventional or non-inventive methods. In steps where there is no logically necessary causal relationship, the execution order of these steps is not limited to the execution order provided in the embodiments of this application. In actual processing or when the device executes the method, it may be executed in the order shown in the embodiments or drawings, or in combination.

[0044] When a vehicle's vacuum booster system malfunctions during operation, it is often accompanied by a decrease in the system's vacuum level. Traditional vacuum booster system control methods typically only trigger a buzzer and indicator light warning when the vacuum level drops. However, relying solely on these warnings doesn't pinpoint the exact cause of the malfunction. Drivers with urgent driving needs may disregard this and continue driving. The continued decline in the vacuum booster system's vacuum level leads to insufficient braking force, increased braking distance, and potentially serious traffic accidents.

[0045] Based on this, embodiments of this application provide a vacuum assist system, such as... Figure 1 As shown, the vacuum booster system 100 includes a pump switch 101, a vacuum pump 102, a tank switch 103, a vacuum tank 104, a vacuum booster 105, a vacuum sensor 106, electronic equipment 107, a brake master cylinder 108, wheel cylinders 109, an engine throttle 110, a vehicle gear position 111, and a vacuum alarm 112.

[0046] The pump switch 101 is connected to the vacuum pump 102, the vacuum booster 105, and the electronic equipment 107, and can control the vacuum pump 102 to be turned on or off.

[0047] Vacuum pump 102, connected to pump switch 101, is used to provide and maintain vacuum for vacuum assist system 100.

[0048] The can switch 103 is connected to the vacuum can 104 and the vacuum booster 105, and can control the opening or closing of the vacuum can 104.

[0049] Vacuum container 104, connected to container switch 103, is used to store vacuum.

[0050] The vacuum booster 105 is connected to the pump switch 101, the tank switch 103 and the brake master cylinder 108. The vacuum pressure provided by the vacuum in the vacuum booster system 100 causes the push rod set inside itself to move, so as to provide hydraulic pressure to drive the brake master cylinder 108 to move.

[0051] Vacuum sensor 106 is connected to the vacuum branch in vacuum assist system 100 and is used to monitor the vacuum level in vacuum assist system 100.

[0052] Electronic device 107 is connected to pump switch 101, tank switch 103, vacuum sensor 106, engine throttle 110, vehicle gear position 111, and vacuum alarm 112. It receives the vacuum level of the vacuum booster system 100 from vacuum sensor 106, controls the vacuum alarm 112 to sound, controls the pump switch 101 and tank switch 103 to open or close, and controls the engine throttle 110 and vehicle gear position 111. In an optional embodiment, electronic device 107 may be an ECU (Electronic Control Unit).

[0053] The master cylinder 108 is connected to the vacuum booster 105 and the wheel cylinder 109, and is used to transmit the hydraulic pressure provided by the vacuum booster 105 to the wheel cylinder 109 of the brake wheel.

[0054] Wheel cylinder 109 is used to provide braking force to the vehicle under the drive of brake master cylinder 108.

[0055] The engine throttle 110 is connected to the electronic device 107 and is used to control the amount of fuel injected into the vehicle.

[0056] The vehicle gear position 111 is connected to the electronic device 107 and is used to control the vehicle's gear position.

[0057] Vacuum alarm 112, connected to electronic device 107, is used to issue an alarm message when the vacuum level of vacuum assist system 100 is abnormal.

[0058] Figure 2 This application provides a flowchart of a vacuum assist system control method according to an embodiment of the present application. This method can be applied to... Figure 1 The vacuum assist system shown is as follows: Figure 2 As shown, the vacuum assist system control method may include the following steps:

[0059] Step S201: If the vacuum level of the vacuum booster system is detected to be lower than the set vacuum level threshold during vehicle operation, the first switch is turned off.

[0060] The vacuum booster system is used to assist vehicle braking. The first switch is either the tank switch of the vacuum tank branch or the pump switch of the vacuum pump branch of the vacuum booster system. The vacuum threshold can be 55 kPa.

[0061] In one alternative implementation, the first switch can be the tank switch of the vacuum tank branch of the vacuum booster system. During vehicle operation, the vacuum level of the vacuum booster system can be monitored by a vacuum sensor. When the vacuum level of the vacuum booster system is lower than a set vacuum level threshold, the tank switch of the vacuum tank branch of the vacuum booster system can be turned off to determine whether there is a leak in the vacuum tank branch.

[0062] For example, if the vacuum level of the vacuum booster system is 54 kPa when the vehicle is in motion, the tank switch of the vacuum tank branch of the vacuum booster system can be turned off.

[0063] Step S202: If the vacuum level of the vacuum assist system is maintained or increases after the first switch is turned off, then the first switch is kept in the closed state.

[0064] In one alternative implementation, if the vacuum level of the vacuum booster system remains or increases after the tank switch of the vacuum tank branch of the vacuum booster system is turned off, it can be determined that the vacuum tank branch of the vacuum booster system is leaking. In this case, the tank switch of the vacuum tank branch of the vacuum booster system can be kept closed to maintain the vacuum level of the vacuum booster system.

[0065] For example, if the vacuum level of the vacuum booster system is 54 kPa before the tank switch of the vacuum tank branch is turned off, and the vacuum level of the vacuum booster system is still 54 kPa after the tank switch of the vacuum tank branch is turned off, then it can be determined that the vacuum tank branch of the vacuum booster system is leaking. In this case, the tank switch of the vacuum tank branch of the vacuum booster system can be kept closed to maintain the vacuum level of the vacuum booster system.

[0066] Step S203: If the vacuum level of the vacuum assist system continues to decrease after the first switch is turned off, then the first switch is turned on and the second switch is turned off.

[0067] The second switch is the other switch between the tank switch and the pump switch, excluding the first switch.

[0068] In one optional implementation, the first switch can be the tank switch of the vacuum tank branch of the vacuum booster system, and the second switch can be the pump switch of the vacuum pump branch of the vacuum booster system. If the vacuum level of the vacuum booster system continues to decrease after the tank switch of the vacuum tank branch is turned off, it can be determined that there is no leak in the vacuum tank branch of the vacuum booster system. To determine whether there is a leak in the vacuum pump branch of the vacuum booster system, the tank switch of the vacuum tank branch of the vacuum booster system can be turned on, and the pump switch of the vacuum pump branch of the vacuum booster system can be turned off.

[0069] For example, if the vacuum level of the vacuum booster system is 54 kPa before the tank switch of the vacuum tank branch is turned off, and the vacuum level of the vacuum booster system is 51 kPa after the tank switch of the vacuum tank branch is turned off, then it can be determined that there is no leakage in the vacuum tank branch of the vacuum booster system, and the tank switch of the vacuum tank branch of the vacuum booster system can be turned on and the pump switch of the vacuum pump branch of the vacuum booster system can be turned off.

[0070] Step S204: If the vacuum level of the vacuum assist system is maintained or increased after the second switch is turned off, then the first switch remains open and the second switch remains closed.

[0071] In one alternative implementation, if the vacuum level of the vacuum booster system remains or increases after the pump switch of the vacuum pump branch of the vacuum booster system is turned off, it can be determined that the vacuum pump branch of the vacuum booster system is leaking. At this time, the tank switch of the vacuum tank branch of the vacuum booster system can be kept open and the pump switch of the vacuum pump branch of the vacuum booster system can be kept closed to maintain the vacuum level of the vacuum booster system.

[0072] For example, if the vacuum level of the vacuum booster system is 51 kPa before the pump switch of the vacuum pump branch is turned off, and the vacuum level of the vacuum booster system is still 51 kPa after the pump switch of the vacuum pump branch is turned off, then it can be determined that the vacuum pump branch of the vacuum booster system is leaking. In this case, the tank switch of the vacuum tank branch of the vacuum booster system can be kept open and the pump switch of the vacuum pump branch of the vacuum booster system can be kept closed to maintain the vacuum level of the vacuum booster system.

[0073] This application embodiment can determine the location of a fault in the vacuum booster system and maintain the vacuum level of the vacuum booster system by controlling the opening and closing states of the tank switch in the vacuum tank branch and the pump switch in the vacuum pump branch of the vacuum booster system, so as to ensure the braking effect.

[0074] In one alternative implementation, if the vacuum level of the vacuum booster system continues to decrease after the second switch is turned off, the vehicle speed can be reduced.

[0075] For example, if the vacuum level of the vacuum booster system is 51 kPa before the pump switch of the vacuum pump branch is turned off, and the vacuum level of the vacuum booster system is 45 kPa after the pump switch of the vacuum pump branch is turned off, then it can be determined that there is no leakage in the vacuum tank branch and the vacuum pump branch of the vacuum booster system. In this case, in order to ensure the driving safety of the vehicle, the vehicle speed can be reduced.

[0076] To reduce vehicle speed, the current vacuum level of the vacuum booster system can be obtained first. After obtaining the current vacuum level, the vehicle speed can be reduced to the speed corresponding to the current vacuum level based on the correlation between the vacuum level and vehicle speed.

[0077] The relationship between the vacuum level of the vacuum booster system and the vehicle speed can be pre-stored in the cache of the vehicle terminal.

[0078] In one alternative implementation, such as Figure 3 As shown, when the vehicle speed is greater than or equal to the minimum protection speed, the vacuum level of the vacuum booster system is directly proportional to the vehicle speed.

[0079] For example, the minimum protection speed can be 40 km / h. Assuming the current vehicle speed is 80 km / h and the vacuum level of the current vehicle's vacuum booster system is 45 kPa, the vehicle speed corresponding to a vacuum level of 45 kPa is 60 km / h. Therefore, the vehicle speed can be reduced from 80 km / h to 60 km / h.

[0080] In some embodiments, the vehicle speed can be reduced by downshifting the vehicle.

[0081] For example, suppose vehicle A is currently in 5th gear. If you need to reduce the speed of vehicle A, you can downshift from 5th gear to 4th gear. If you still need to reduce the speed of vehicle A after downshifting from 5th gear to 4th gear, you can downshift from 4th gear to 3rd gear.

[0082] In other embodiments, the vehicle speed can be reduced by decreasing the throttle opening and thus the amount of fuel injected.

[0083] For example, assuming the throttle opening of vehicle B is 4.0, if it is necessary to reduce the speed of vehicle B, the throttle opening of vehicle B can be reduced from 4.0 to 3.0 to reduce the speed of vehicle B. If it is still necessary to reduce the speed of vehicle B after reducing the throttle opening of vehicle B from 4.0 to 3.0, the throttle opening of vehicle B can be reduced from 3.0 to 2.0.

[0084] In another alternative implementation, such as Figure 4As shown, when the vehicle speed is greater than or equal to the minimum protection speed, the vacuum level of the vacuum booster system and the vehicle speed can be correlated in a stepwise positive manner.

[0085] For example, the minimum protected vehicle speed can be 40 km / h. Assuming the current vehicle speed is 80 km / h, and the vacuum level of the vacuum booster system is 45 kPa, a vacuum level of 45 kPa corresponds to a vehicle speed of 60 km / h, a vacuum level of 40 kPa corresponds to a vehicle speed of 60 km / h, and a vacuum level of 30 kPa corresponds to a vehicle speed of 50 km / h. When the vacuum level is 45 kPa, the vehicle speed can be reduced from 80 km / h to 60 km / h. When the vacuum level is reduced to 40 kPa, the current vehicle speed can be maintained. When the vacuum level is reduced to 30 kPa, the vehicle speed can be reduced from 60 km / h to 50 km / h.

[0086] Using a stepped deceleration method can reduce the risk of rear-end collisions caused by vehicles decelerating too quickly.

[0087] To record fault information of the vacuum booster system and save computing resources, this application provides another vacuum booster system control method, which can be performed by an on-board terminal. For example... Figure 5 As shown, the vacuum assist system control method includes the following steps:

[0088] Step S501: If the vacuum level of the vacuum booster system is detected to be lower than the set vacuum level threshold during vehicle operation, an alarm message is issued.

[0089] The vacuum booster system is used to assist vehicle braking, and the vacuum threshold can be 55 kPa.

[0090] In one alternative implementation, if the vacuum level of the vacuum assist system is detected to be lower than a set vacuum threshold during vehicle operation, an alarm message can be issued to remind the driver to take appropriate driving strategies.

[0091] Step S502: Determine whether the vehicle is currently braking and whether the vehicle's current speed is less than the minimum protection speed.

[0092] If it is determined that the vehicle is currently braking and the current vehicle speed is less than the minimum protection speed, it can be assumed that the driver has taken the appropriate driving strategy and step S503 can be executed. If it is determined that the vehicle is not currently braking, or the current vehicle speed is greater than or equal to the minimum protection speed, step S504 can be executed.

[0093] In one alternative implementation, in order to determine whether the vehicle is currently in the braking process, a first opening signal and a second opening signal of the vehicle's brake pedal can be obtained first. The first opening signal is the opening signal of the brake pedal at the previous moment, and the second opening signal is the opening signal of the brake pedal at the current moment. Based on the first opening signal and the second opening signal, it can be determined whether the vehicle is currently in the braking process.

[0094] Specifically, the first and second opening degrees of the vehicle's brake pedal can be determined based on the first and second opening degree signals. If the second opening degree is greater than the first opening degree, it can be determined that the vehicle is currently in the braking process. For example, assuming the first opening degree is 0 and the second opening degree is 40%, it can be determined that the vehicle is currently in the braking process.

[0095] Step S503: Stop monitoring the vacuum level of the vacuum assist system.

[0096] Step S504: Determine whether the vacuum level of the vacuum assist system continues to decrease.

[0097] If it is determined that the vacuum level of the vacuum assist system continues to decrease, step S505 can be executed. If it is determined that the vacuum level of the vacuum assist system no longer decreases, step S503 can be executed again.

[0098] Step S505: Turn off the first switch and determine whether the vehicle is currently braking and whether the vehicle's current speed is less than the minimum protection speed.

[0099] The first switch is either the tank switch of the vacuum tank branch of the vacuum booster system or the pump switch of the vacuum pump branch. For example, the first switch can be the tank switch of the vacuum tank branch of the vacuum booster system.

[0100] If it is determined that the vehicle is currently braking and the vehicle's current speed is less than the minimum protection speed, then the process can return to step S503. If it is determined that the vehicle is not currently braking, or the vehicle's current speed is greater than or equal to the minimum protection speed, then the process can proceed to step S506.

[0101] Step S506: Determine whether the vacuum level of the vacuum assist system continues to decrease.

[0102] If it is determined that the vacuum level of the vacuum assist system continues to decrease, proceed to step S507. If it is determined that the vacuum level of the vacuum assist system no longer decreases, proceed to step S508.

[0103] Step S507: Turn on the first switch and turn off the second switch.

[0104] The second switch is the other switch between the tank switch and the pump switch, excluding the first switch. For example, the first switch could be the tank switch of the vacuum tank branch of the vacuum booster system, and the second switch could be the pump switch of the vacuum pump branch of the vacuum booster system.

[0105] Step S508: Record the current fault information.

[0106] In one alternative implementation, if it is determined that the vacuum level of the vacuum booster system no longer decreases after the tank switch of the vacuum tank branch of the vacuum booster system is closed, then a leak in the vacuum tank branch can be identified, and the fault information can be recorded for subsequent vehicle maintenance.

[0107] Step S509: Determine whether the vacuum level of the vacuum assist system continues to decrease.

[0108] If it is determined that the vacuum level of the vacuum assist system continues to decrease, step S511 can be executed. If it is determined that the vacuum level of the vacuum assist system no longer decreases, step S510 can be executed.

[0109] Step S510: Record the current fault information.

[0110] In one alternative implementation, if it is determined that the vacuum level of the vacuum booster system no longer decreases after the pump switch of the vacuum pump branch of the vacuum booster system is turned off, then a leak in the vacuum pump branch can be identified, and the fault information can be recorded for subsequent vehicle maintenance.

[0111] Step S511: Determine whether the vehicle is currently braking and whether the vehicle's current speed is less than the minimum protection speed.

[0112] If it is determined that the vehicle is currently braking and the vehicle's current speed is less than the minimum protection speed, then the process can return to step S503. If it is determined that the vehicle is not currently braking, or the vehicle's current speed is greater than or equal to the minimum protection speed, then the process can proceed to step S512.

[0113] Step S512: Based on the correspondence between the vacuum level of the vacuum booster system and the vehicle speed, reduce the vehicle speed to the speed corresponding to the current vacuum level.

[0114] The process of reducing the vehicle speed to the speed corresponding to the current vacuum level, based on the correspondence between the vacuum level of the vacuum booster system and the vehicle speed, has been described in detail above and will not be repeated here.

[0115] By recording the vehicle's fault location during the execution of the vacuum booster system control method, reliable data can be provided for subsequent maintenance, facilitating later vehicle repairs. By monitoring whether the vehicle is in the braking process and whether the vehicle speed has decreased to the minimum protection speed during the execution of the vacuum booster system control method, it can be determined whether the driver has detected a fault in the vacuum booster system. If it is determined that the driver has detected a fault in the vacuum booster system and adopted a braking and deceleration driving strategy, the monitoring of the vacuum level of the vacuum booster system can be stopped, saving resources.

[0116] Based on the same inventive concept, this invention also provides a structural schematic diagram of a vacuum assist system control device, as shown below. Figure 6 As shown, the vacuum assist system control device includes:

[0117] The monitoring unit 601 is used to turn off the first switch if the vacuum level of the vacuum booster system is detected to be lower than the set vacuum level threshold during vehicle operation; the vacuum booster system is used to assist vehicle braking; the first switch is either the tank switch of the vacuum tank branch of the vacuum booster system or the pump switch of the vacuum pump branch.

[0118] The control unit 602 is used to keep the first switch closed if the vacuum level of the vacuum booster system is maintained or increased after the first switch is closed.

[0119] If the vacuum level of the vacuum booster system continues to decrease after the first switch is turned off, then the first switch is turned on and the second switch is turned off; the second switch is the other switch between the tank switch and the pump switch besides the first switch.

[0120] If the vacuum level of the vacuum assist system is maintained or increased after the second switch is turned off, then the first switch remains open and the second switch remains closed.

[0121] In one possible implementation, the control unit 602 is also configured to reduce the vehicle speed if the vacuum level of the vacuum booster system continues to decrease after the second switch is turned off.

[0122] In one possible implementation, the control unit 602 is specifically used to reduce the vehicle speed to the speed corresponding to the current vacuum level based on the correspondence between the vacuum level of the vacuum booster system and the vehicle speed.

[0123] In one possible implementation, when the vehicle speed is greater than or equal to the minimum protected vehicle speed, the vacuum level of the vacuum booster system is directly proportional to the vehicle speed.

[0124] In one possible implementation, the control unit 602 is further configured to stop monitoring the vacuum level of the vacuum booster system if the vehicle is currently braking and the vehicle's current speed is less than the minimum protection speed.

[0125] In one possible implementation, the control unit 602 is specifically used to acquire a first opening signal and a second opening signal of the vehicle's brake pedal. The first opening signal is the opening signal of the brake pedal at the previous moment, and the second opening signal is the opening signal of the brake pedal at the current moment. Based on the first opening signal and the second opening signal, the control unit determines whether the vehicle is currently in the braking process.

[0126] Based on the same inventive concept, this application also provides an electronic device. This electronic device includes at least a memory for storing data and a processor. The processor for data processing can be implemented using a microprocessor, CPU, GPU (Graphics Processing Unit), DSP, or FPGA. The memory stores operation instructions, which can be computer-executable code, to implement the various steps in the vacuum assist system control method described in this application.

[0127] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may be... Figure 1 Electronic devices 107. For example... Figure 7 As shown, the electronic device 107 includes a memory 701, a processor 702, a data acquisition module 703, and a bus 704. The memory 701, processor 702, and data acquisition module 703 are all connected via the bus 704, which is used for data transmission between the memory 701, processor 702, and data acquisition module 703.

[0128] The memory 701 can be used to store software programs and modules. The processor 702 executes various functional applications and data processing of the electronic device 107 by running the software programs and modules stored in the memory 701, such as the vacuum assist system control method provided in this application embodiment. The memory 701 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs of at least one application, etc.; the data storage area may store data created according to the use of the electronic device 107, etc. In addition, the memory 701 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0129] The processor 702 is the control center of the electronic device 107. It connects various parts of the electronic device 107 via the bus 704 and various interfaces and lines. It executes various functions and processes data of the electronic device 107 by running or executing software programs and / or modules stored in the memory 701, and by calling data stored in the memory 701. Optionally, the processor 702 may include one or more processing units, such as a CPU, GPU (Graphics Processing Unit), or digital processing unit.

[0130] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, can be used to implement the vacuum assist system control method described in any embodiment of this application.

[0131] In some possible implementations, various aspects of the vacuum booster system control method provided in this application can also be implemented as a program product, including program code. When the program product is run on a computer device, the program code causes the computer device to perform the steps of the vacuum booster system control method according to the various exemplary embodiments of this application described above. For example, the computer device can perform actions such as... Figure 1 The flowchart of the vacuum booster system control method is shown.

[0132] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0133] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0134] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0135] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes ​ The steps of the function specified in one or more boxes.

[0136] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A control method for a vacuum-assisted system, characterized in that, The method includes: If the vacuum level of the vacuum booster system is detected to be lower than the set vacuum level threshold during vehicle operation, the first switch is turned off; the vacuum booster system is used to assist vehicle braking; the first switch is the tank switch of the vacuum tank branch of the vacuum booster system. If the vacuum level of the vacuum booster system remains or increases after the first switch is turned off, it is determined that the vacuum tank branch of the vacuum booster system is leaking; the first switch is kept closed; the current fault information is recorded; it is determined whether the vehicle is currently braking and whether the current vehicle speed is less than the minimum protection speed; if so, monitoring of the vacuum level of the vacuum booster system is stopped. If the vacuum level of the vacuum booster system continues to decrease after the first switch is turned off, then the first switch is turned on and the second switch is turned off; the second switch is the pump switch of the vacuum pump branch of the vacuum booster system. If the vacuum level of the vacuum booster system remains or increases after the second switch is turned off, it is determined that the vacuum pump branch of the vacuum booster system is leaking; the first switch remains open and the second switch remains closed; the current fault information is recorded; it is determined whether the vehicle is currently braking and whether the current vehicle speed is less than the minimum protection speed; if so, monitoring of the vacuum level of the vacuum booster system is stopped.

2. The method according to claim 1, characterized in that, The method further includes: If the vacuum level of the vacuum booster system continues to decrease after the second switch is turned off, the vehicle speed will be reduced.

3. The method according to claim 2, characterized in that, The reduction of the vehicle's speed includes: Based on the correspondence between the vacuum level of the vacuum booster system and the vehicle speed, the vehicle speed is reduced to the speed corresponding to the current vacuum level.

4. The method according to claim 3, characterized in that, When the vehicle speed is greater than or equal to the minimum protected vehicle speed, the vacuum level of the vacuum assist system is directly proportional to the vehicle speed.

5. The method according to claim 1, characterized in that, The following method is used to determine whether the vehicle is currently braking: Acquire a first opening signal and a second opening signal of the vehicle's brake pedal; the first opening signal is the opening signal of the brake pedal at the previous moment of the current moment. The second opening signal is the opening signal of the brake pedal at the current moment; Based on the first opening signal and the second opening signal, determine whether the vehicle is currently in the braking process.

6. A vacuum booster system control device, characterized in that, The device includes: The monitoring unit is used to turn off the first switch if the vacuum level of the vacuum booster system is detected to be lower than a set vacuum level threshold during vehicle operation; the vacuum booster system is used to assist vehicle braking; the first switch is the tank switch of the vacuum tank branch of the vacuum booster system. The control unit is configured to determine if the vacuum level of the vacuum booster system is leaking in the vacuum tank branch if the vacuum level of the vacuum booster system is maintained or increased after the first switch is turned off; maintain the first switch in the closed state; record the current fault information; determine whether the vehicle is currently braking and whether the current vehicle speed is less than the minimum protection speed; if so, stop monitoring the vacuum level of the vacuum booster system. If the vacuum level of the vacuum booster system continues to decrease after the first switch is turned off, then the first switch is turned on and the second switch is turned off; the second switch is the pump switch of the vacuum pump branch of the vacuum booster system. If the vacuum level of the vacuum booster system remains or increases after the second switch is turned off, it is determined that the vacuum pump branch of the vacuum booster system is leaking; the first switch remains open and the second switch remains closed; the current fault information is recorded; it is determined whether the vehicle is currently braking and whether the current vehicle speed is less than the minimum protection speed; if so, monitoring of the vacuum level of the vacuum booster system is stopped.

7. The apparatus according to claim 6, characterized in that, The control unit is also used for: If the vacuum level of the vacuum booster system continues to decrease after the second switch is turned off, the vehicle speed will be reduced.

8. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can run on the processor, and when the computer program is executed by the processor, it implements the method of any one of claims 1 to 5.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, it implements the method according to any one of claims 1 to 5.

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