Delay dormancy operation method and equipment for brake-by-wire power-assisted system and vehicle

Abstract

The invention belongs to the technical field of vehicles, and particularly relates to a drive-by-wire power-assisted system dormancy delay operation method and device and a vehicle. The method comprises the steps of determining whether the state of a vehicle meets a preset condition; starting countdown under the condition that the state of the vehicle meets the preset condition; after the countdown is finished, whether a driver steps on a brake pedal or not is detected; under the condition that it is detected that the driver steps on the brake pedal, the brake-by-wire power-assisted system delays running for preset time; after the delayed operation of the on-line control power assisting system is finished, cutting off power supply of a power load and storing fault information; and the brake-by-wire power-assisted system enters a dormant state. Under the condition that a driver steps on the brake pedal, the brake-by-wire power assisting system delays operation for the preset time, various possible conditions can be dealt with, and safety and reliability are higher. And meanwhile, the problem that the brake-by-wire power-assisted system cannot enter a dormant state due to misoperation of a driver is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, and particularly relates to a delay hibernation operation method, device and vehicle of a brake-by-wire assistance system. BACKGROUND

[0002] A brake-by-wire assistance product enters delay hibernation after a vehicle is turned off. In the prior art, a fixed delay time, such as 60 seconds, is usually set, and then the delay hibernation is entered. However, during the 60 seconds of delay hibernation, various situations may occur, such as the vehicle is not stationary, the brake pedal is stepped on, or there is a network request for how to apply the brake, and the existing solution cannot handle the emergency situations during the delay hibernation process, which affects the safety of the vehicle and the people. SUMMARY

[0003] An object of the present application is to provide a delay hibernation operation method, device and vehicle of a brake-by-wire assistance system, which can solve the technical problem that the prior art cannot handle emergency situations during the delay hibernation process of the brake-by-wire assistance system.

[0004] According to a first aspect of the present application, a delay hibernation operation method of a brake-by-wire assistance system is provided, comprising: determining whether a state of a vehicle meets a preset condition, wherein the preset condition is a condition for starting hibernation of the brake-by-wire assistance system; starting a countdown if the state of the vehicle meets the preset condition; detecting whether a driver steps on a brake pedal after the countdown ends; delaying operation of the brake-by-wire assistance system for a preset time if it is detected that the driver steps on the brake pedal; cutting off power supply to a load and storing fault information after the delay operation of the brake-by-wire assistance system ends; the brake-by-wire assistance system enters a hibernation state.

[0005] Optionally, during the delay operation of the brake-by-wire assistance system, the method further comprises: acquiring a delay operation time of the brake-by-wire assistance system; determining an output performance of the brake-by-wire assistance system according to the delay operation time of the brake-by-wire assistance system and the preset time, wherein the brake-by-wire assistance system outputs full performance when entering the delay operation, and the output of the brake-by-wire assistance system is zero after the preset time.

[0006] Optionally, during the delay operation of the brake-by-wire assistance system, the method further comprises: maintaining a communication function of the brake-by-wire assistance system with an ECU; The communication function with the external brake request and the diagnostic communication function of the brake-by-wire system are turned off.

[0007] Optionally, after the brake-by-wire system enters the hibernation state, the method further comprises: In a case where the vehicle ignition signal is detected to be powered on, the brake-by-wire system exits the hibernation state. In a case where the vehicle movement is detected, the brake-by-wire system maintains the hibernation state.

[0008] Optionally, the determining whether the state of the vehicle meets the preset condition comprises: detecting whether the vehicle ignition signal is in a powered-off state; In a case where the vehicle ignition signal is in the powered-off state, detecting whether the vehicle is in a stationary state; In a case where the vehicle is in the stationary state, determining that the state of the vehicle meets the preset condition.

[0009] Optionally, during the countdown process, the method further comprises: In a case where the vehicle ignition signal is detected to be powered on, stopping the countdown, and the brake-by-wire system resumes full-performance operation.

[0010] Optionally, during the delay operation of the brake-by-wire system, the method further comprises: In a case where the vehicle ignition signal is detected to be powered on, the brake-by-wire system resumes full-performance operation.

[0011] According to a second aspect of the present application, an electronic device is provided, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions being executed by the processor to implement the steps of the method for delay hibernation operation of a brake-by-wire system according to the first aspect of the present application.

[0012] According to a third aspect of the present application, a vehicle is provided, comprising an electronic device according to the second aspect of the present application.

[0013] According to a fourth aspect of the present application, a readable storage medium is provided, the readable storage medium storing a program or instructions, the program or instructions being executed to implement the steps of the method for delay hibernation operation of a brake-by-wire system according to the first aspect of the present application.

[0014] The beneficial effects of the present application are that the present application can cope with various possible situations and is more safe and reliable by detecting whether the driver steps on the brake pedal after the condition for starting the hibernation of the brake-by-wire assist system is met by the state of the vehicle, and delaying the operation of the brake-by-wire assist system for a preset time in the case where the driver steps on the brake pedal. Meanwhile, the problem that the brake-by-wire assist system cannot enter the hibernation state due to the misoperation of the driver is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a flow chart of a brake-by-wire assist system hibernation delay running method in an embodiment of the present application.

[0016] Figure 2 is a flow chart of a brake-by-wire assist system hibernation delay running method in another embodiment of the present application. DETAILED DESCRIPTION

[0017] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0018] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application its application or uses.

[0019] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus should be considered as falling within the scope of the disclosure. Any reference to claim should be interpreted as referring to the corresponding claim in the present application.

[0020] It should be noted that like reference numerals and letters refer to like items in the following drawings and that, as such, once an item is defined in one drawing, it is not necessary to discuss it further in subsequent drawings.

[0021] In the description of the present application, the features involving the terms "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more. In addition, "and / or" in the specification means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0022] As shown in Figure 1 The present embodiment introduces a brake-by-wire assist system hibernation delay running method, including steps 1100-1600.

[0023] Step 1100: Determine whether the state of the vehicle meets the preset condition, wherein the preset condition is the condition for starting hibernation of the brake-by-wire system.

[0024] Generally, the brake-by-wire system enters hibernation only after the vehicle is turned off. And the vehicle can still be in motion after being turned off, in which case the brake-by-wire system can still be needed to provide assistance. Therefore, it is necessary to further determine whether the vehicle is stationary.

[0025] Step 1200: Start the countdown when the state of the vehicle meets the preset condition.

[0026] During the countdown, the brake-by-wire system is in full performance output. At the same time, the brake-by-wire system maintains normal communication functions, including communication functions with the ECU (Electronic Control Unit), communication functions with external brake requests, and diagnostic communication functions. That is, during the countdown, the brake-by-wire system can normally receive other signals and respond.

[0027] The countdown can be set according to actual needs. For example, the countdown can be 1 minute, or it can be set to other times.

[0028] During the countdown, if the vehicle ignition signal is detected to be powered on, the countdown is stopped, and the brake-by-wire system returns to full performance operation.

[0029] Step 1300: After the countdown ends, detect whether the driver steps on the brake pedal.

[0030] Whether the driver steps on the brake pedal can be detected by a brake pedal stroke sensor, which sends a detection signal to the brake-by-wire system.

[0031] Step 1400: In the case where it is detected that the driver steps on the brake pedal, the brake-by-wire system is delayed for a preset time.

[0032] If it is detected that the driver steps on the brake pedal, it can be that the driver judges that braking is still needed, but it can also be that the driver makes a mistake.

[0033] In order to take into account these two different situations, the brake-by-wire system is delayed for a preset time in this embodiment. On the one hand, in the case where the driver judges that braking is needed, the brake-by-wire system can provide braking to meet the actual braking needs. On the other hand, if it is a mistake by the driver, after the brake-by-wire system is delayed for the preset time, it can normally enter the hibernation state, avoiding the problem that the brake-by-wire system cannot enter the hibernation state due to a mistake by the driver.

[0034] If the vehicle ignition signal is detected to be powered on during the delay operation process, the online brake assist system resumes full performance operation.

[0035] If the vehicle ignition signal is detected to be powered on during the delay operation process, it indicates that the driver judges that the vehicle needs to be started and is ready to drive the vehicle, and in this case, the brake function of the online brake assist system needs to be used to exit the hibernation process and resume full performance operation.

[0036] Step 1500: After the online brake assist system delay operation ends, the power load supply is cut off and the fault information is stored.

[0037] Step 1600: The online brake assist system enters a hibernation state.

[0038] As shown in Figure 2 If it is detected that the driver does not step on the brake pedal, the online brake assist system does not need to enter the delay operation process, directly enters the step of cutting off the power load supply and storing fault information, and then enters the hibernation state.

[0039] The embodiment detects whether the driver steps on the brake pedal after the state of the vehicle meets the condition for starting the hibernation of the online brake assist system, and delays the operation of the online brake assist system for a predetermined time if the driver steps on the brake pedal, which can cope with various possible situations and is more safe and reliable. At the same time, the problem that the online brake assist system cannot enter the hibernation state due to the misoperation of the driver is avoided.

[0040] In the embodiment, during the delay operation process of the online brake assist system, the method further comprises: acquiring the delay operation time of the online brake assist system; determining the output performance of the online brake assist system according to the delay operation time of the online brake assist system and the predetermined time, wherein the output performance of the online brake assist system is full performance when it enters the delay operation, and the output of the online brake assist system is zero after the predetermined time.

[0041] Before entering the delay operation, the output performance of the online brake assist system is 100%, maintaining full performance output. During the delay operation process of the online brake assist system, its output performance gradually decreases with time.

[0042] The output performance of the online brake assist system during the delay operation process is related to the delay operation time of the online brake assist system, and the longer the delay operation time, the lower the output performance.

[0043] When the delay runtime reaches the preset time, the output performance of the brake-by-wire system is reduced to zero. The output performance curve of the brake-by-wire system during the delay runtime can be calibrated in advance. During the delay runtime, the output performance of the brake-by-wire system can be linearly changed with time.

[0044] In the embodiment, during the delay runtime of the brake-by-wire system, the method further comprises: maintaining the communication function of the brake-by-wire system with the ECU; and closing the communication function of the brake-by-wire system with an external brake request and the diagnostic communication function.

[0045] During the delay runtime of the brake-by-wire system, the communication function with the external brake request is closed, and the diagnostic communication function is also closed. The external brake request is usually a brake instruction from an advanced driving assistance system, such as a deceleration request of an adaptive cruise system, a brake request of an automatic emergency brake system, a slow brake request of an automatic parking assistance system, etc. In the case that the vehicle has been turned off and is in a stationary state, it means that all automatic driving and assistance driving functions have been stopped, and in this case, the brake request from these systems should not appear. By closing the communication function with the external brake request, the system can be prevented from listening to these non-existent messages, and unnecessary energy consumption can be reduced.

[0046] During the process of powering off the vehicle for hibernation, diagnosis is usually not needed. By closing the diagnostic communication function at this time, the system power consumption is further reduced.

[0047] At the same time, the communication with the ECU is maintained during the delay runtime, so that the brake-by-wire system maintains the brake function. When receiving the ECU instruction, the brake can be performed at any time.

[0048] In the embodiment, after the brake-by-wire system enters the hibernation state, the method further comprises: when detecting that the vehicle ignition signal is powered on, the brake-by-wire system exits the hibernation state; and when detecting that the vehicle is moving, the brake-by-wire system maintains the hibernation state.

[0049] After the vehicle ignition signal is powered on, it means that the vehicle is about to start driving, and the brake system needs to be available to ensure driving safety. From the perspective of user experience, the driver hopes that after starting the vehicle, all functions will immediately return to normal. In this case, the brake-by-wire system exits the hibernation state.

[0050] The movement of the vehicle in the off state does not belong to the normal driving scene. For example, the vehicle can be towed after a breakdown, the vehicle can move in a transport board or a container, the vehicle can be moved in a repair shop, and the like. In the above scenes, the brake system does not need to provide assistance. In this case, the brake-by-wire assistance system continues to remain in the dormant state, on the one hand to avoid the risk of accidental awakening of the system, and on the other hand to reduce power consumption.

[0051] In the embodiment, the step 1100 includes steps 1110-1130.

[0052] Step 1110: Detect whether the vehicle ignition signal is in the power-off state.

[0053] The vehicle ignition signal includes a hard-wired ignition signal and a CAN (Controller Area Network) bus ignition signal. When any one of the ignition signals is in the power-on state, it is considered that the vehicle is in the ignition state, and the brake-by-wire assistance system remains in the normal brake assistance function. When both ignition signals are in the power-off state, it is considered that the vehicle is in the off state.

[0054] Step 1120: In the case where the vehicle ignition signal is in the power-off state, detect whether the vehicle is in a stationary state.

[0055] If the vehicle ignition signal is not powered off, it means that the condition for the brake-by-wire assistance system to enter the sleep mode is not met, and in this case the brake-by-wire assistance system remains in full performance operation.

[0056] If the vehicle ignition signal is in the power-off state, then detect whether the vehicle is in a stationary state. The vehicle's wheel speed sensor signal can be obtained to determine whether the vehicle is in a stationary state according to the wheel speed sensor signal. If the wheel speed sensor detects that the wheel speed is zero or the wheel speed is less than a set speed threshold, it is considered that the vehicle is in a stationary state.

[0057] For example, for a four-wheel passenger vehicle, each of the four wheels is provided with a corresponding wheel speed sensor. When the wheel speeds of the four wheels are all less than the speed threshold, it is considered that the vehicle is in a stationary state.

[0058] Step 1130: In the case where the vehicle is in a stationary state, determine that the state of the vehicle meets a preset condition.

[0059] When the vehicle ignition signal is powered off and the vehicle is in a stationary state, it is considered that the preset condition is met, and the brake-by-wire assistance system can enter the sleep process.

[0060] The embodiment introduces an electronic device, comprising a processor and a memory, the memory stores programs or instructions which can run on the processor, and the programs or instructions are executed by the processor to realize the steps of the line control brake assist system delay hibernation running method according to any embodiment of the present application.

[0061] The embodiment introduces a vehicle, comprising the electronic device according to any embodiment of the present application.

[0062] The embodiment introduces a readable storage medium, the readable storage medium stores programs or instructions, and the programs or instructions are executed to realize the steps of the line control brake assist system delay hibernation running method according to any embodiment of the present application.

[0063] Although some specific embodiments of the present application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration, but not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application.

[0064] Those of ordinary skill in the art can realize that the modules and algorithm steps described in connection with the embodiments disclosed herein can be realized by electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0065] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described device and equipment can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0066] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. In actual implementation, another division mode can be used. For example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed modules can be indirect coupling or communication connection through some interface, device or module, which can be electrical, mechanical or other form.

[0067] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., may be located in one place, or may be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment of the present application.

[0068] In addition, each functional module in the embodiment of the present application can be integrated into a processing module, or each module can exist physically alone, or two or more modules can be integrated into one module.

[0069] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media that can store program codes.

[0070] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features and the technical features disclosed in the present application (but not limited to) having similar functions.

[0071] It should be understood that the sequence of the application content and the steps in the embodiments does not absolutely mean the execution order, and the execution order of the processes should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The foregoing description of the implementation of the present disclosure has been given for the purpose of illustration and description. The foregoing description is not exhaustive and does not limit the present disclosure to the exact form disclosed. Various modifications and changes can also be made according to the above teachings, or can be obtained from the practice of the present disclosure. These embodiments are chosen and described to illustrate the principles of the present disclosure and its practical application, so that those skilled in the art can utilize the present disclosure in various embodiments and various modifications with the specific use in mind.

Claims

1. A brake-by-wire brake assist system delay hibernation operation method characterized by, The method comprises: determining whether the state of the vehicle meets a preset condition, wherein the preset condition is a condition for starting hibernation of the brake-by-wire system; in the case where the state of the vehicle meets the preset condition, starting a countdown; after the countdown ends, detecting whether the driver steps on the brake pedal; in the case where it is detected that the driver steps on the brake pedal, delaying the operation of the brake-by-wire system for a preset time; after the delay operation of the brake-by-wire system ends, cutting off the power supply of the power load and storing fault information; the brake-by-wire system enters a hibernation state.

2. The method of claim 1, wherein, During the delay operation of the brake-by-wire system, the method further comprises: acquiring the delay operation time of the brake-by-wire system; determining the output performance of the brake-by-wire system according to the delay operation time of the brake-by-wire system and the preset time, wherein the brake-by-wire system is in full performance output when it enters the delay operation, and the output of the brake-by-wire system is zero after the preset time.

3. The method of claim 1, wherein, During the delay operation of the brake-by-wire system, the method further comprises: maintaining the communication function of the brake-by-wire system with the ECU; turning off the communication function of the brake-by-wire system with external brake requests and the diagnostic communication function.

4. The method of claim 1, wherein, After the brake-by-wire system enters the hibernation state, the method further comprises: in the case where it is detected that the vehicle ignition signal is powered on, the brake-by-wire system exits the hibernation state; in the case where it is detected that the vehicle moves, the brake-by-wire system maintains the hibernation state.

5. The method of claim 1, wherein, The determination of whether the state of the vehicle meets the preset condition comprises: detecting whether the vehicle ignition signal is in a power-off state; in the case where the vehicle ignition signal is in a power-off state, detecting whether the vehicle is in a stationary state; in the case where the vehicle is in a stationary state, determining that the state of the vehicle meets the preset condition.

6. The method of claim 1, wherein, During the delay operation of the brake-by-wire system, the method further comprises: in the case where it is detected that the vehicle ignition signal is powered on, the brake-by-wire system returns to full performance operation.

7. The method of claim 1, wherein, The method further comprises: in the case where it is not detected that the driver steps on the brake pedal, performing the step of cutting off the power supply of the power load and storing fault information.

8. An electronic device, comprising: An electronic device comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions are executed by the processor to implement the steps of the delay hibernation operation method of the brake-by-wire system according to any one of claims 1 to 7.

9. A vehicle characterized by comprising: The electronic device according to claim 8.

10. A readable storage medium, characterized by, The readable storage medium stores programs or instructions, and the programs or instructions are executed to implement the steps of the delay hibernation operation method of the brake-by-wire system according to any one of claims 1 to 7.

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