Electric vacuum pump control methods, equipment and storage media

Abstract

This invention relates to the field of vacuum pump control technology, and discloses an electric vacuum pump control method, device, and storage medium. The method includes: when the cumulative operating time of the electric vacuum pump reaches a first preset time and a first pressure value has not reached a preset threshold, controlling the electric vacuum pump to continue operating until the cumulative operating time reaches a second preset time, and obtaining a second pressure value; determining the vacuum pump leakage fault type based on the pressure range formed by the first and second pressure values; determining the leakage level corresponding to the vacuum pump leakage fault type based on the second pressure value; and executing a corresponding fault handling strategy based on the vacuum pump leakage fault type and leakage level. This invention solves the problem of vacuum pumps being unable to achieve multi-level fine control by determining the vacuum pump leakage fault type and corresponding leakage level based on the pressure value of the vacuum tank and executing the corresponding fault handling strategy. It provides sufficient operating time and enables precise control of different leakage levels, avoiding high-load operation.

Description

Technical Field

[0001] This invention relates to the field of vacuum pump control technology, and in particular to an electric vacuum pump control method, equipment, and storage medium. Background Technology

[0002] Electric vacuum pumps are widely used in turbocharged vehicles, start-stop systems, and pure electric and hybrid vehicles. However, vacuum systems may leak or the electric vacuum pump may malfunction. Without vacuum assistance, the brake pedal is difficult to press, severely impacting braking performance and leading to driving safety issues. Conventional control relies on the vacuum pump's pressure within a certain range to turn on and off, failing to achieve multi-level, precise control with overlapping control ranges. This results in simpler control, significant variations in performance, and a poor driving experience. Frequent start-stop cycles or prolonged high-load operation of the vacuum pump severely shorten its lifespan, causing premature failure of the vacuum-assisted braking system. Summary of the Invention

[0003] The main objective of this invention is to provide an electric vacuum pump control method, device, and storage medium, aiming to solve the technical problems in the prior art where vacuum pumps cannot achieve multi-level fine control, control is simple, control effects vary greatly, and the driving experience is poor.

[0004] To achieve the above objectives, the present invention provides an electric vacuum pump control method, the method comprising the following steps:

[0005] When the cumulative working time of the electric vacuum pump reaches the first preset time and the first pressure value of the vacuum tank when the vehicle is not braked does not reach the preset threshold, the electric vacuum pump is controlled to continue working until the cumulative working time of the electric vacuum pump reaches the second preset time, and the second pressure value of the vacuum tank under the current condition is obtained, wherein the vacuum tank is connected to the electric vacuum pump, and the second preset time is longer than the first preset time.

[0006] The type of vacuum pump leakage fault is determined based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs;

[0007] The leakage level corresponding to the vacuum pump leakage fault type is determined based on the second pressure value;

[0008] The corresponding fault handling strategy is executed according to the type of vacuum pump leakage fault and the corresponding leakage level.

[0009] Optionally, the preset pressure range includes a first pressure range, and the vacuum pump leakage fault type includes a rapid leakage fault, wherein the first pressure range is the pressure range corresponding to the rapid leakage fault;

[0010] Determining the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs includes:

[0011] If the pressure range formed by the first pressure and the second pressure value belongs to the first pressure range, then the leakage fault type of the electric vacuum pump is determined to be a rapid leakage fault.

[0012] Optionally, the preset pressure range further includes a second pressure range, and the vacuum pump leakage fault type further includes a medium-speed leakage fault, wherein the second pressure range is the pressure range corresponding to the medium-speed leakage fault;

[0013] The step of determining the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs further includes:

[0014] If the pressure range formed by the first pressure and the second pressure value belongs to the second pressure range, then the leakage fault type of the electric vacuum pump is determined to be a medium-speed leakage fault.

[0015] Optionally, the preset pressure range further includes a third pressure range, and the vacuum pump leakage fault type further includes a minor leakage fault, wherein the third pressure range is the pressure range corresponding to the minor leakage fault;

[0016] The step of determining the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs further includes:

[0017] If the pressure range formed by the first pressure and the second pressure value belongs to the third pressure range, then the leakage fault type of the electric vacuum pump is determined to be a low-speed leakage fault.

[0018] Optionally, the leakage level corresponding to the rapid leakage fault includes a fast level and a slow level. Determining the leakage level corresponding to the vacuum pump leakage fault type based on the second pressure value includes:

[0019] When the leakage fault type corresponding to the vacuum pump is a rapid leakage fault, the sub-interval of the first pressure range corresponding to the rapid leakage fault in which the second pressure value is located is determined, wherein the sub-interval of the first pressure range includes a first sub-interval and a second sub-interval.

[0020] If the second pressure value is within the first sub-interval, then the vacuum pump is determined to be in the rapid leakage fault fast level;

[0021] If the second pressure value is within the second sub-interval, then the vacuum pump is determined to be in the slow level of a rapid leakage fault.

[0022] Optionally, the leakage level corresponding to the medium-speed leakage fault includes a fast level and a slow level, and the step of determining the leakage level corresponding to the vacuum pump leakage fault type based on the second pressure value further includes:

[0023] When the leakage fault type corresponding to the vacuum pump is a medium-speed leakage fault, the sub-interval of the second pressure range corresponding to the medium-speed leakage fault where the second pressure value is located is determined, wherein the sub-interval of the second pressure range includes a third sub-interval and a fourth sub-interval.

[0024] If the second pressure value is in the third sub-interval, then the vacuum pump is determined to be in the fast level of medium-speed leakage fault;

[0025] If the second pressure value is in the fourth sub-interval, then the vacuum pump is determined to be in the slow level of medium-speed leakage fault.

[0026] Optionally, the fault handling strategy includes a fast leak fast process, a fast leak slow process, a medium-speed leak fast process, a medium-speed leak slow process, and a small leak process. The step of executing the corresponding fault handling strategy based on the vacuum pump leak fault type and the corresponding leak level includes:

[0027] When the electric vacuum pump is in a fast-leaking fault fast-level condition, execute the fast-leaking fast process;

[0028] When the electric vacuum pump is at the slow level of a fast leak fault, execute the fast leak slow process;

[0029] When the electric vacuum pump is at the fast level of medium-speed leakage fault, execute the medium-speed leakage fast process.

[0030] When the electric vacuum pump is at the slow level of medium-speed leakage fault, the medium-speed leakage slow process is executed.

[0031] When the electric vacuum pump experiences a minor leak fault, a minor leak procedure is executed.

[0032] Optionally, before controlling the electric vacuum pump to continue operating when the cumulative operating time of the electric vacuum pump reaches a first preset time and the first pressure value of the vacuum tank under non-braking conditions does not reach a preset threshold, until the cumulative operating time of the electric vacuum pump reaches a second preset time and the second pressure value of the vacuum tank under the current conditions is obtained, the method further includes:

[0033] When the operation of the electric vacuum pump is detected, the cumulative operating time of the electric vacuum pump is obtained;

[0034] When the cumulative working time reaches the first preset time, the first pressure value of the vacuum tank is detected when the vehicle is not braking;

[0035] Determine whether the first pressure value has reached a preset threshold;

[0036] If the condition is not met, then the following steps are performed: when the cumulative working time of the electric vacuum pump reaches the first preset time and the first pressure value of the vacuum tank under the condition that the vehicle is not braked does not reach the preset threshold, the electric vacuum pump is controlled to continue working until the cumulative working time of the electric vacuum pump reaches the second preset time, and the second pressure value of the vacuum tank under the current condition is obtained.

[0037] Furthermore, to achieve the above objectives, the present invention also proposes an electric vacuum pump control device, which includes: a memory, a processor, and an electric vacuum pump control program stored in the memory and executable on the processor, wherein the electric vacuum pump control program is configured to implement the steps of the electric vacuum pump control method described above.

[0038] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing an electric vacuum pump control program, which, when executed by a processor, implements the steps of the electric vacuum pump control method described above.

[0039] This invention addresses the problem of existing vacuum pumps' inability to achieve multi-level fine control by determining the vacuum pump's cumulative operating time and leakage level based on the pressure range formed by the first and second pressure values. This ensures the pump continues operating until the cumulative operating time reaches a second preset time, thereby acquiring a second pressure value. The invention then determines the type of vacuum pump leakage fault based on the pressure range formed by the first and second pressure values, identifies the corresponding leakage level based on the second pressure value, and executes a corresponding fault handling strategy. This provides sufficient operating time for the vacuum pump and allows for precise control of different leakage levels, avoiding frequent start-stop cycles or prolonged high-load operation, improving the driving experience, and extending the vacuum pump's lifespan. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the electric vacuum pump control device in the hardware operating environment involved in the embodiments of the present invention;

[0041] Figure 2 This is a flowchart illustrating the first embodiment of the electric vacuum pump control method of the present invention;

[0042] Figure 3 This is a flowchart illustrating the second embodiment of the electric vacuum pump control method of the present invention;

[0043] Figure 4 This is a schematic diagram of the overall process of a second embodiment of the electric vacuum pump control method of the present invention;

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0046] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of an electric vacuum pump control device in the hardware operating environment of an embodiment of the present invention.

[0047] like Figure 1 As shown, the electric vacuum pump control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0048] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the electric vacuum pump control device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0049] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and an electric vacuum pump control program.

[0050] exist Figure 1In the electric vacuum pump control device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the electric vacuum pump control device of the present invention can be set in the electric vacuum pump control device. The electric vacuum pump control device calls the electric vacuum pump control program stored in the memory 1005 through the processor 1001 and executes the electric vacuum pump control method provided in the embodiment of the present invention.

[0051] This invention provides a method for controlling an electric vacuum pump, as described in the embodiments below. Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the electric vacuum pump control method of the present invention.

[0052] In this embodiment, the electric vacuum pump control method includes the following steps:

[0053] Step S10: When the cumulative working time of the electric vacuum pump reaches the first preset time and the first pressure value of the vacuum tank when the vehicle is not braked does not reach the preset threshold, control the electric vacuum pump to continue working until the cumulative working time of the electric vacuum pump reaches the second preset time, and obtain the second pressure value of the vacuum tank under the current condition, wherein the vacuum tank is connected to the electric vacuum pump, and the second preset time is longer than the first preset time.

[0054] It should be noted that the execution subject of this embodiment is an electric vacuum pump control device, but it can also be other devices that can achieve the same or similar functions. This embodiment does not limit this; this embodiment uses an electric vacuum pump control device as an example for explanation.

[0055] It is understandable that an electric vacuum pump (EVP) uses an electric motor to rotate the pump to draw in air, thereby creating a vacuum. The main function of the electric vacuum pump is to push the vacuum booster via a lever when the brake pedal is pressed, which in turn pushes the master cylinder to output hydraulic oil to the wheel cylinders, so that the brakes of each wheel can produce a braking effect. The vacuum pump outputs mainly the pressure generated by the vacuum booster system.

[0056] In the specific implementation, after matching the electric vacuum pump with the vacuum volume of a certain vehicle model, the time t (i.e., the first preset time) required to reach the maximum pressure value P1 (i.e., the preset threshold) from the vacuum to the control range of the system design is tested. Considering the performance degradation of the electric vacuum pump after long-term use, the redundant time is increased, and 2t time (the second preset time) is used as the necessary completion time for the vacuum assist system to extract the required vacuum pressure when it is in good condition. The second preset time is twice the first preset time.

[0057] It is understood that the preset threshold is the maximum pressure value of the control range designed by the system, which can be 70% of the atmospheric pressure value (i.e., 70%P). This embodiment does not impose specific restrictions on this.

[0058] Step S20: Determine the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs.

[0059] It should be noted that the preset pressure range is the range corresponding to the type of vacuum pump leakage fault. Different control ranges can be set for different leakage rates. Adjacent control ranges can have overlapping areas, that is, there can be overlapping areas between different preset ranges. The leakage rate can include fast leakage, medium-speed leakage and small leakage.

[0060] Step S30: Determine the leakage level corresponding to the vacuum pump leakage fault type based on the second pressure value.

[0061] It should be noted that by using pressure values ​​collected at fixed time points as the basis for judgment, multiple different levels of leakage faults can be defined.

[0062] It is understandable that the type of vacuum pump leakage fault is determined by the pressure range formed by the first and second pressure values ​​of the two vacuum pump tests. The types of vacuum pump leakage faults include fast leakage faults, medium-speed leakage faults, and minor leakage faults. Fast leakage faults and medium-speed leakage faults include corresponding fast and slow levels, respectively.

[0063] Step S40: Execute the corresponding fault handling strategy according to the vacuum pump leakage fault type and the corresponding leakage level.

[0064] It should be noted that by implementing corresponding fault handling strategies based on the type of vacuum pump leakage fault and the corresponding leakage level, precise control of different fault handling measures can be achieved.

[0065] This embodiment controls the electric vacuum pump to continue operating until the cumulative operating time reaches a second preset time and the first pressure value has not reached a preset threshold, when the cumulative operating time of the electric vacuum pump reaches a first preset time and the first pressure value has not reached a preset threshold, thereby obtaining a second pressure value. The vacuum pump leakage fault type is determined based on the pressure range formed by the first and second pressure values. The leakage level corresponding to the vacuum pump leakage fault type is determined based on the second pressure value. The corresponding fault handling strategy is then executed based on the vacuum pump leakage fault type and leakage level. By determining the vacuum pump leakage fault type and corresponding leakage level based on the pressure value of the vacuum tank, and then executing the corresponding fault handling strategy, this method solves the problem that existing vacuum pumps cannot achieve multi-level fine control. It provides the vacuum pump with sufficient operating time and enables precise control over different leakage levels, avoiding frequent start-stop operations or prolonged high-load operation, improving the driving experience, and extending the service life of the vacuum pump.

[0066] refer to Figure 3 , Figure 3 This is a flowchart illustrating the second embodiment of the electric vacuum pump control method of the present invention.

[0067] Based on the first embodiment described above, step S20 in the electric vacuum pump control method of this embodiment includes:

[0068] Step S201: If the pressure range formed by the first pressure and the second pressure value belongs to the first pressure range, then the leakage fault type of the electric vacuum pump is determined to be a rapid leakage fault.

[0069] It should be noted that the preset pressure range includes the first pressure range, and the vacuum pump leakage fault types include rapid leakage faults. The first pressure range is the pressure range corresponding to the rapid leakage fault.

[0070] It is understandable that when the pressure range formed by the first pressure and the second pressure value belongs to the first pressure range, the leakage fault type of the electric vacuum pump is determined to be a rapid leakage fault, and the level corresponding to the rapid leakage fault of the electric vacuum pump is further determined.

[0071] Further, determining the leakage level corresponding to the vacuum pump leakage fault type based on the second pressure value includes: when the leakage fault type corresponding to the vacuum pump is a rapid leakage fault, determining the sub-interval of the first pressure range corresponding to the rapid leakage fault where the second pressure value is located, wherein the sub-interval of the first pressure range includes a first sub-interval and a second sub-interval; if the second pressure value is in the first sub-interval, then the vacuum pump is determined to be in the rapid leakage fault fast level;

[0072] If the second pressure value is within the second sub-interval, then the vacuum pump is determined to be in the slow level of a rapid leakage fault.

[0073] It should be noted that the leakage levels corresponding to the rapid leakage fault include fast level and slow level, and the sub-intervals of the first pressure range include a first sub-interval and a second sub-interval. The first sub-interval is the pressure range corresponding to the fast level of the rapid leakage fault, and the second sub-interval is the pressure range corresponding to the slow level of the rapid leakage fault.

[0074] Furthermore, determining the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs also includes: if the pressure range formed by the first pressure value and the second pressure value belongs to the second pressure range, then the leakage fault type of the electric vacuum pump is determined to be a medium-speed leakage fault.

[0075] It should be noted that the preset pressure range also includes a second pressure range, and the vacuum pump leakage fault types also include medium-speed leakage faults. The second pressure range is the pressure range corresponding to the medium-speed leakage fault.

[0076] It is understandable that when the pressure range formed by the first pressure and the second pressure value belongs to the second pressure range, the leakage fault type of the electric vacuum pump is determined to be a medium-speed leakage fault, and the level corresponding to the medium-speed leakage fault of the electric vacuum pump is further determined.

[0077] It is worth noting that the faster the leakage rate, the lower the pressure value in the vacuum tank. Therefore, the upper and lower limits of the first pressure range are smaller than the upper and lower limits of the second pressure range, and there may be overlapping areas between the first and second pressure ranges.

[0078] Furthermore, determining the leakage level corresponding to the vacuum pump leakage fault type based on the second pressure value further includes: when the leakage fault type corresponding to the vacuum pump is a medium-speed leakage fault, determining the sub-interval of the second pressure range corresponding to the medium-speed leakage fault where the second pressure value is located, wherein the sub-interval of the second pressure range includes a third sub-interval and a fourth sub-interval; if the second pressure value is in the third sub-interval, then the vacuum pump is determined to be in the fast level of the medium-speed leakage fault;

[0079] If the second pressure value is in the fourth sub-interval, then the vacuum pump is determined to be in the slow level of medium-speed leakage fault.

[0080] It should be noted that the leakage levels corresponding to medium-speed leakage faults include fast and slow levels, and the sub-intervals of the second pressure range include the third and fourth sub-intervals. The first sub-interval is the pressure range corresponding to the fast level of fast leakage faults, and the second sub-interval is the pressure range corresponding to the slow level of fast leakage faults.

[0081] It is understandable that, since the first and second sub-intervals are sub-intervals of the first pressure interval, and the third and fourth sub-intervals are sub-intervals of the second pressure interval, the upper and lower limits of the first and second sub-intervals are both smaller than those of the third and fourth sub-intervals.

[0082] Furthermore, determining the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs also includes: if the pressure range formed by the first pressure value and the second pressure value belongs to a third pressure range, then the leakage fault type of the electric vacuum pump is determined to be a low-speed leakage fault.

[0083] It should be noted that the preset pressure range also includes a third pressure range, and the vacuum pump leakage fault types also include minor leakage faults. The third pressure range is the pressure range corresponding to minor leakage faults.

[0084] It is understandable that when the pressure range formed by the first and second pressure values ​​falls within the third pressure range, the leakage fault type of the electric vacuum pump is judged to be a minor leakage fault.

[0085] It is worth noting that the faster the leakage rate, the lower the pressure value in the vacuum tank. Therefore, the upper and lower limits of the second pressure range are smaller than the upper and lower limits of the third pressure range, and there may be overlapping areas between the second and third pressure ranges.

[0086] Furthermore, the step of executing the corresponding fault handling strategy based on the type and level of the vacuum pump leakage fault includes: when the electric vacuum pump has a fast leakage fault at the fast level, executing a fast leakage fast process; when the electric vacuum pump has a fast leakage fault at the slow level, executing a fast leakage slow process; when the electric vacuum pump has a medium-speed leakage fault at the fast level, executing a medium-speed leakage fast process; when the electric vacuum pump has a medium-speed leakage fault at the slow level, executing a medium-speed leakage slow process; and when the electric vacuum pump has a minor leakage fault, executing a minor leakage process.

[0087] It should be noted that the fault handling strategy includes a fast leak fast process, a fast leak slow process, a medium leak fast process, a medium leak slow process, and a small leak process, which are the handling processes corresponding to the fast level of fast leak faults, the slow level of fast leak faults, the fast level of medium leak faults, the slow level of medium leak faults, and the small leak faults, respectively.

[0088] It is understandable that in the fast leakage fast process, fast leakage slow process, medium-speed leakage fast process, medium-speed leakage slow process, and small leakage process, the electric vacuum pump will stop working after the corresponding duration or when the pressure value inside the vacuum tank reaches the preset threshold.

[0089] It is worth noting that after handling minor leaks, the electric vacuum pump can operate normally.

[0090] Furthermore, before the step of controlling the electric vacuum pump to continue working until the cumulative working time of the electric vacuum pump reaches a first preset time and the first pressure value of the vacuum tank under the condition that the vehicle is not braking does not reach a preset threshold, and before obtaining the second pressure value of the vacuum tank under the current condition, the method further includes: when the electric vacuum pump is detected to be working, obtaining the cumulative working time of the electric vacuum pump; when the cumulative working time reaches the first preset time, detecting the first pressure value of the vacuum tank under the condition that the vehicle is not braking; determining whether the first pressure value has reached a preset threshold; if it has not reached the threshold, then executing the step of controlling the electric vacuum pump to continue working until the cumulative working time of the electric vacuum pump reaches the second preset time and obtaining the second pressure value of the vacuum tank under the current condition.

[0091] It should be noted that the electric vacuum pump provides a vacuum source for the vacuum booster system. The electric vacuum pump is connected to the vacuum tank through a vacuum pipeline. A vacuum pressure sensor is installed inside the vacuum tank to detect the vacuum pressure inside the vacuum tank in real time, namely the first pressure value and the second pressure value.

[0092] It is understandable that if the first pressure value reaches the preset threshold when the cumulative working time reaches the first preset time or the second first preset time, it indicates that the electric vacuum pump is working normally and no leakage has occurred.

[0093] like Figure 4 As shown, Figure 4 This is the overall flowchart of the electric vacuum pump control method in this embodiment. After the test begins, the electric vacuum pump is started and timing begins. It is determined whether the vacuum tank pressure reaches 70%P (70% of atmospheric pressure) when the vehicle is not braking. If it does, it indicates that the vacuum pump is working normally. If it does not, the vacuum pump continues to work when the vehicle is not braking until the timing reaches 2t. The vacuum pressure Px of the vacuum tank is detected, and it is determined whether the conditions for rapid leakage, slow rapid leakage, medium-speed leakage, slow medium-speed leakage, and minor leakage fault are met. If the condition for rapid leakage is met, it is processed according to the rapid leakage rapid process, and the vacuum pump continues to work. If the condition for rapid leakage is met, it is processed according to the rapid leakage slow process. If the condition for medium-speed leakage is met, it is processed according to the medium-speed leakage fast process. If the condition for medium-speed leakage is met, it is processed according to the medium-speed leakage slow process. If the condition for minor leakage fault is met, it is processed according to the minor leakage process.

[0094] This embodiment determines the leakage fault type of the electric vacuum pump as a rapid leakage fault if the pressure range formed by the first pressure and the second pressure value belongs to the first pressure range. By setting different control ranges for different leakage rates, sufficient operating time for the vacuum pump can be provided, and precise control can be achieved for different leakage levels, avoiding frequent start-stop or long-term high-load operation.

[0095] Furthermore, to achieve the above objectives, the present invention also proposes an electric vacuum pump control device, which includes: a memory, a processor, and an electric vacuum pump control program stored in the memory and executable on the processor, wherein the electric vacuum pump control program is configured to implement the steps of the electric vacuum pump control method described above.

[0096] Since this electric vacuum pump control device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0097] Furthermore, embodiments of the present invention also propose a storage medium storing an electric vacuum pump control program, which, when executed by a processor, implements the steps of the electric vacuum pump control method described above.

[0098] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0099] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0100] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0101] In addition, for technical details not described in detail in this embodiment, please refer to the electric vacuum pump control method provided in any embodiment of the present invention, which will not be repeated here.

[0102] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0103] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0104] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0105] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for controlling an electric vacuum pump, characterized in that, The method includes: When the cumulative working time of the electric vacuum pump reaches the first preset time and the first pressure value of the vacuum tank when the vehicle is not braked does not reach the preset threshold, the electric vacuum pump is controlled to continue working until the cumulative working time of the electric vacuum pump reaches the second preset time, and the second pressure value of the vacuum tank under the current condition is obtained, wherein the vacuum tank is connected to the electric vacuum pump, and the second preset time is longer than the first preset time. The type of vacuum pump leakage fault is determined based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs; The leakage level corresponding to the vacuum pump leakage fault type is determined based on the second pressure value; Execute the corresponding fault handling strategy according to the type of vacuum pump leakage fault and the corresponding leakage level; The preset pressure range includes a first pressure range, and the vacuum pump leakage fault type includes a rapid leakage fault. The first pressure range is the pressure range corresponding to the rapid leakage fault. Determining the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs includes: If the pressure range formed by the first pressure and the second pressure value belongs to the first pressure range, then the leakage fault type of the electric vacuum pump is determined to be a rapid leakage fault.

2. The method as described in claim 1, characterized in that, The preset pressure range also includes a second pressure range, and the vacuum pump leakage fault type also includes a medium-speed leakage fault. The second pressure range is the pressure range corresponding to the medium-speed leakage fault. The step of determining the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs further includes: If the pressure range formed by the first pressure and the second pressure value belongs to the second pressure range, then the leakage fault type of the electric vacuum pump is determined to be a medium-speed leakage fault.

3. The method as described in claim 2, characterized in that, The preset pressure range also includes a third pressure range, and the vacuum pump leakage fault type also includes a small leakage fault. The third pressure range is the pressure range corresponding to the small leakage fault. The step of determining the vacuum pump leakage fault type based on the preset pressure range to which the pressure range formed by the first pressure value and the second pressure value belongs further includes: If the pressure range formed by the first pressure and the second pressure value belongs to the third pressure range, then the leakage fault type of the electric vacuum pump is determined to be a minor leakage fault.

4. The method as described in claim 3, characterized in that, The leakage levels corresponding to rapid leakage faults include fast levels and slow levels. Determining the leakage level corresponding to the vacuum pump leakage fault type based on the second pressure value includes: When the leakage fault type corresponding to the vacuum pump is a rapid leakage fault, the sub-interval of the first pressure range corresponding to the rapid leakage fault in which the second pressure value is located is determined, wherein the sub-interval of the first pressure range includes a first sub-interval and a second sub-interval. If the second pressure value is within the first sub-interval, then the vacuum pump is determined to be in the rapid leakage fault fast level; If the second pressure value is within the second sub-interval, then the vacuum pump is determined to be in the slow level of a rapid leakage fault.

5. The method as described in claim 4, characterized in that, The leakage levels corresponding to medium-speed leakage faults include fast and slow levels. Determining the leakage level corresponding to the vacuum pump leakage fault type based on the second pressure value further includes: When the leakage fault type corresponding to the vacuum pump is a medium-speed leakage fault, the sub-interval of the second pressure range corresponding to the medium-speed leakage fault where the second pressure value is located is determined, wherein the sub-interval of the second pressure range includes a third sub-interval and a fourth sub-interval. If the second pressure value is in the third sub-interval, then the vacuum pump is determined to be in the fast level of medium-speed leakage fault; If the second pressure value is in the fourth sub-interval, then the vacuum pump is determined to be in the slow level of medium-speed leakage fault.

6. The method according to any one of claims 1 to 5, characterized in that, The fault handling strategy includes a fast leak quick process, a fast leak slow process, a medium-speed leak fast process, a medium-speed leak slow process, and a small leak process. The step of executing the corresponding fault handling strategy based on the vacuum pump leak fault type and the corresponding leak level includes: When the electric vacuum pump is in a fast-leaking fault fast-level condition, execute the fast-leaking fast process; When the electric vacuum pump is at the slow level of a fast leak fault, execute the fast leak slow process; When the electric vacuum pump is at the fast level of medium-speed leakage fault, execute the medium-speed leakage fast process. When the electric vacuum pump is at the slow level of medium-speed leakage fault, the medium-speed leakage slow process is executed. When the electric vacuum pump experiences a minor leak fault, the minor leak procedure is executed.

7. The method as described in claim 1, characterized in that, The step of controlling the electric vacuum pump to continue operating when the cumulative operating time of the electric vacuum pump reaches a first preset time, and the first pressure value of the vacuum tank under non-braking conditions does not reach a preset threshold, until the cumulative operating time of the electric vacuum pump reaches a second preset time, and before obtaining the second pressure value of the vacuum tank under the current conditions, further includes: When the operation of the electric vacuum pump is detected, the cumulative operating time of the electric vacuum pump is obtained; When the cumulative working time reaches the first preset time, the first pressure value of the vacuum tank is detected when the vehicle is not braking; Determine whether the first pressure value has reached a preset threshold; If the condition is not met, then the following steps are performed: when the cumulative working time of the electric vacuum pump reaches the first preset time and the first pressure value of the vacuum tank under the condition that the vehicle is not braked does not reach the preset threshold, the electric vacuum pump is controlled to continue working until the cumulative working time of the electric vacuum pump reaches the second preset time, and the second pressure value of the vacuum tank under the current condition is obtained.

8. An electric vacuum pump control device, characterized in that, The electric vacuum pump control device includes: a memory, a processor, and an electric vacuum pump control program stored in the memory and executable on the processor, the electric vacuum pump control program being configured to implement the electric vacuum pump control method as described in any one of claims 1 to 7.

9. A storage medium, characterized in that, The storage medium stores an electric vacuum pump control program, which, when executed by a processor, implements the electric vacuum pump control method as described in any one of claims 1 to 7.

Images