Vehicle brake vacuum determination method, system and device and electronic equipment

Abstract

The invention discloses a vehicle braking vacuum determination method, system and device and electronic equipment, and the method comprises the steps: determining a target vacuum braking mode of a to-be-detected vehicle based on the vehicle speed of the to-be-detected vehicle and a preset vehicle speed threshold rule; for any target vacuum braking mode, based on the actual braking vacuum degree information and the actual air pressure information of the to-be-detected vehicle in the current state, whether a first vacuum source is started to conduct vacuum boosting on the to-be-detected vehicle or not is determined; and after the first vacuum source needs to be started to carry out vacuum boosting on the to-be-detected vehicle, whether a second vacuum source is started to carry out auxiliary vacuum boosting on the to-be-detected vehicle or not is determined based on the actual vacuum degree increasing rate, the actual air pressure information and the preset vacuum degree increasing rate of the to-be-detected vehicle. The problem that braking vacuum is slow is solved, when a single vacuum source breaks down, vacuum source redundant backup can be provided to continue to conduct vacuum boosting on the to-be-detected vehicle, and the practicability of braking vacuum is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle brake control, and in particular to a method, system, device and electronic equipment for determining vehicle brake vacuum. Background Art

[0002] With the development of society and the advancement of science and technology, more and more passenger car brake systems use vacuum boosters as brake system boosting devices, specifically using a single vacuum source and supplemented by corresponding control methods to provide a boosting energy source for the vacuum booster.

[0003] However, vehicles using a single vacuum source generally have problems such as slow brake vacuum replenishment and insufficient brake vacuum booster system boosting function under certain operating conditions, such as continuous braking down a long slope or use in plateau areas. In addition, once a single vacuum source fails, there is no other replacement product, which causes the entire brake vacuum booster system to lose its boosting function, which is less practical. Summary of the invention

[0004] The embodiments of the present application provide a method, system, device and electronic device for determining the brake vacuum of a vehicle. The embodiments provided by the present application solve the technical problems of slow vehicle brake vacuum replenishment and lack of vacuum source redundant backup in the prior art. The embodiments provided by the present application reduce the problem of slow brake vacuum. In addition, when a single vacuum source fails, the embodiments provided by the present application can provide vacuum source redundant backup to continue to provide vacuum assistance to the vehicle to be tested, thereby improving the practicality of the brake vacuum.

[0005] According to a first aspect of an embodiment of the present application, an embodiment of the present application provides a method for determining a brake vacuum of a vehicle, the method for determining a brake vacuum of a vehicle comprising:

[0006] Determining a target vacuum braking mode of the vehicle to be detected based on the vehicle speed of the vehicle to be detected and a preset vehicle speed threshold rule;

[0007] For any of the target vacuum braking modes, determining whether to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected based on actual brake vacuum information and actual air pressure information of the vehicle to be detected in the current state;

[0008] For any of the target vacuum braking modes, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, it is determined whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected based on the actual vacuum growth rate, actual air pressure information and preset vacuum growth rate of the vehicle to be detected.

[0009] In a feasible implementation manner, the target vacuum braking mode includes a first target vacuum braking mode, a second target vacuum braking mode and a third target vacuum braking mode, and the target vacuum braking mode of the vehicle to be detected is determined based on the vehicle speed to be detected and a preset vehicle speed threshold rule, including:

[0010] If the speed of the vehicle to be detected is less than a first preset speed threshold, determining that the vehicle to be detected enters a first target vacuum braking mode;

[0011] If the speed of the vehicle to be detected is greater than or equal to a first preset speed threshold, and the speed of the vehicle to be detected is less than or equal to a second preset speed threshold, determining that the vehicle to be detected enters a second target vacuum braking mode;

[0012] If the vehicle speed of the vehicle to be detected is greater than a second preset vehicle speed threshold, it is determined that the vehicle to be detected enters a third target vacuum braking mode.

[0013] In a feasible implementation manner, for any of the target vacuum braking modes, determining whether to turn on the first vacuum source to perform vacuum assistance on the vehicle to be detected based on actual brake vacuum information and actual air pressure information of the vehicle to be detected in a current state includes:

[0014] For any of the target vacuum braking modes, determining a preset vacuum degree threshold lower limit of the vehicle to be detected in the current state according to actual air pressure information of the vehicle to be detected in the current state;

[0015] If the actual brake vacuum information of the vehicle to be detected in the current state is less than the preset vacuum threshold lower limit, determining to open the first vacuum source to perform vacuum assistance on the vehicle to be detected;

[0016] If the actual brake vacuum degree information of the vehicle to be detected in the current state is greater than or equal to the preset vacuum degree threshold lower limit, the target vacuum braking mode of the vehicle to be detected is re-determined.

[0017] In a feasible implementation manner, determining whether to turn on the second vacuum source to perform auxiliary vacuum assistance on the vehicle to be detected based on the actual vacuum degree growth rate, actual air pressure information and preset vacuum degree growth rate of the vehicle to be detected includes:

[0018] Determining a preset vacuum degree growth rate of the vehicle to be detected under a current target vacuum braking mode based on actual air pressure information of the vehicle to be detected;

[0019] Based on the actual vacuum degree growth rate of the detected vehicle and the preset vacuum degree growth rate, it is determined whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the detected vehicle.

[0020] In a feasible implementation manner, the determining whether to turn on the second vacuum source to perform auxiliary vacuum assistance on the vehicle to be detected based on the actual vacuum degree growth rate and the preset vacuum degree growth rate of the detected vehicle includes:

[0021] If the actual vacuum degree growth rate of the vehicle to be detected is less than the preset vacuum degree growth rate, determining to open the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected;

[0022] If the actual vacuum degree growth rate of the vehicle to be detected is greater than or equal to the preset vacuum degree growth rate, it is determined not to open the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected.

[0023] In a feasible implementation manner, after determining that the second vacuum source is not turned on to assist the vehicle to be detected with vacuum assistance if the actual vacuum degree growth rate of the vehicle to be detected is greater than or equal to the preset vacuum degree growth rate, the method for determining the vehicle brake vacuum further includes:

[0024] After determining that the actual vacuum degree growth rate of the detected vehicle is greater than or equal to the preset vacuum degree growth rate, based on whether the actual brake vacuum degree information of the detected vehicle in the current state is greater than or equal to the preset vacuum degree threshold upper limit;

[0025] If so, the vacuum assistance provided by the first vacuum source and the second vacuum source to the vehicle to be detected is turned off.

[0026] According to the second aspect of the embodiment of the present application, a system for determining vehicle brake vacuum is provided, wherein the system for determining vehicle brake vacuum comprises: a controller, a vacuum degree detection device, an air pressure detection device, a first vacuum source, a second vacuum source, a control valve device and a vacuum booster, wherein the vacuum degree detection device, the air pressure detection device, the first vacuum source and the second vacuum source are all communicatively connected to the controller, and the first vacuum source and the second vacuum source are both communicatively connected to the vacuum booster via the control valve device.

[0027] In the third aspect of the embodiment of the present application, the embodiment of the present application further provides a device for determining a vehicle brake vacuum, wherein the device for determining a vehicle brake vacuum comprises:

[0028] A first determination module, configured to determine a target vacuum braking mode of the vehicle to be detected based on the vehicle speed of the vehicle to be detected and a preset vehicle speed threshold rule;

[0029] A second determination module is used to determine whether to turn on the first vacuum source to perform vacuum assistance on the vehicle to be detected based on actual brake vacuum information and actual air pressure information of the vehicle to be detected in a current state for any of the target vacuum braking modes;

[0030] The third determination module is used to determine whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected for any of the target vacuum braking modes, based on the actual vacuum growth rate, actual air pressure information and preset vacuum growth rate of the vehicle to be detected, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected.

[0031] In a fourth aspect of the embodiments of the present application, the embodiments of the present application provide an electronic device, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and the machine-readable instructions are executed by the processor to execute the steps of the method for determining the vehicle brake vacuum as described above.

[0032] In a fifth aspect of the embodiments of the present application, the embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for determining the vehicle brake vacuum as described above are executed.

[0033] The vehicle brake vacuum determination method, system, device and electronic device provided in the embodiments of the present application, compared with the prior art, the embodiments provided by the present application determine the target vacuum braking mode of the vehicle to be detected based on the vehicle speed of the vehicle to be detected and the preset speed threshold rule, and for any target vacuum braking mode, based on the actual brake vacuum information and actual air pressure information of the vehicle to be detected in the current state, determine whether to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, and then for any target vacuum braking mode, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, based on the actual vacuum growth rate of the vehicle to be detected, the actual air pressure information and the preset vacuum growth rate, determine whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected, thereby reducing the problem of slow braking vacuum, and when a single vacuum source fails, the embodiments provided by the present application can provide a vacuum source redundant backup to continue to provide vacuum assistance to the vehicle to be detected, thereby improving the practicality of the brake vacuum. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flow chart of a method for determining a vehicle brake vacuum provided in an embodiment of the present application is shown;

[0035] Figure 2 A flowchart of an embodiment of a method for determining a vehicle brake vacuum provided by an embodiment of the present application is shown;

[0036] Figure 3A flowchart of another embodiment of a method for determining a vehicle brake vacuum provided in an embodiment of the present application is shown;

[0037] Figure 4 A structural block diagram of a vehicle brake vacuum determination system provided by an embodiment of the present application is shown;

[0038] Figure 5 A structural block diagram of a vehicle brake vacuum determination device provided by an embodiment of the present application is shown;

[0039] Figure 6 A schematic structural diagram of an electronic device provided in an embodiment of the present application is shown.

[0040] Figure 5 and Figure 6 The corresponding relationship between the reference numerals and the names of the drawings is as follows:

[0041] 500 a device for determining a vehicle brake vacuum; 510 a first determination module; 520 a second determination module; 530 a third determination module; 600 an electronic device; 610 a processor; 620 a memory; 630 a bus. DETAILED DESCRIPTION

[0042] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0043] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0044] First, the applicable application scenarios of the present application are introduced. The embodiments provided in the present application are applicable to the field of vehicle braking control technology.

[0045] At present, vehicles using a single vacuum source generally have problems such as slow brake vacuum replenishment and insufficient brake vacuum booster system boosting function under certain operating conditions, such as continuous braking down a long slope or use in plateau areas. In addition, once a single vacuum source fails, there is no other replacement product, which causes the entire brake vacuum booster system to lose its boosting function, which is poor in practicality.

[0046] At present, pure electric vehicles and hybrid vehicles usually use electric vacuum pumps as the only vacuum source, preset the electric vacuum pump on and off thresholds, and control the electric vacuum pump to turn on or off by comparing the vacuum degree in the vacuum booster and the electric vacuum pump on and off thresholds. The control program is generally written into the vehicle controller or engine management system; internal combustion engine vehicles usually use mechanical vacuum pumps as the only vacuum source. There is a mechanical connection between the mechanical vacuum pump and the internal combustion engine, and the mechanical vacuum pump is started or shut down with the internal combustion engine.

[0047] Therefore, when the vacuum is consumed continuously and rapidly, and the vacuum consumption is greater than the replenishing capacity of a single vacuum pump, the boosting effect of the vacuum booster will inevitably deteriorate; if a single vacuum pump fails, the control method of the prior art fails to control other vacuum pumps as redundant backup vacuum pumps; and the traditional control method only optimizes the start and stop thresholds of the electric vacuum pump, and cannot fundamentally solve the problem that the vehicle needs to quickly replenish the vacuum when the vacuum is continuously consumed; when a single vacuum source fails, it cannot provide a redundant backup of the vacuum source for the vehicle's braking system.

[0048] Based on this, the embodiments of the present application provide a method, system, device and electronic device for determining vehicle brake vacuum. When a single vacuum source fails, the embodiments provided by the present application can provide a redundant backup of the vacuum source to continue to provide vacuum assistance to the vehicle to be tested, thereby improving the practicality of the brake vacuum.

[0049] See also Figure 1 , Figure 1 A flow chart of a method for determining a vehicle brake vacuum provided in an embodiment of the present application, the method for determining a vehicle brake vacuum comprises the following steps:

[0050] S101 . Determine a target vacuum braking mode of the vehicle to be detected based on the vehicle speed of the vehicle to be detected and a preset vehicle speed threshold rule.

[0051] In this step, the embodiment provided by the present application first receives the speed of the vehicle to be detected, and then determines the target vacuum braking mode of the vehicle to be detected based on the received speed of the vehicle to be detected and the preset speed thresholds of each gear in the preset speed threshold rules.

[0052] It can be understood that in the embodiments provided in the present application, it is assumed that the target vacuum braking mode corresponding to low vehicle speed is the low-speed vacuum braking mode; it is assumed that the target vacuum braking mode corresponding to medium vehicle speed is the normal vacuum braking mode; and it is assumed that the target vacuum braking mode corresponding to high vehicle speed is the high-speed vacuum braking mode.

[0053] S102. For any of the target vacuum braking modes, based on actual brake vacuum information and actual air pressure information of the vehicle to be detected in a current state, determine whether to turn on a first vacuum source to provide vacuum assistance to the vehicle to be detected.

[0054] In this step, after determining the target vacuum braking mode of the vehicle to be detected in the current state, the preset vacuum degree threshold range corresponding to the target vacuum braking mode is determined based on the actual air pressure information, and then according to the size relationship between the actual braking vacuum degree information of the vehicle to be detected in the current state and the preset vacuum degree threshold range, it is determined whether to turn on the first vacuum source to perform vacuum assistance on the vehicle to be detected, and if it is determined that the first vacuum source is not turned on to perform vacuum assistance on the vehicle to be detected, the target vacuum braking mode of the vehicle to be detected is re-determined.

[0055] It can be understood that the reason for re-determining the target vacuum braking mode of the vehicle to be detected when it is determined that the first vacuum source will not be turned on to provide vacuum assistance to the vehicle to be detected is that the actual braking vacuum degree of the vehicle to be detected in the current state is relatively large, which may be due to the vehicle speed being covered in the current state. Therefore, it is necessary to restart the determination of the target vacuum braking mode corresponding to the vehicle speed, as well as the new preset vacuum degree threshold range under the target vacuum braking mode.

[0056] Here, the higher the actual braking vacuum degree, the greater the output force of the vacuum booster, and the shorter the process time of pressing the brake pedal, which in turn leads to a reduction in braking distance. Therefore, different target vacuum braking modes need to be determined according to different vehicle speeds. In the embodiments provided in the present application, each target vacuum braking mode corresponds to a set of preset vacuum degree threshold ranges, and the preset vacuum degree threshold ranges include a preset vacuum degree threshold lower limit and a preset vacuum degree threshold upper limit.

[0057] The preset vacuum degree threshold range includes a preset vacuum degree threshold lower limit and a preset vacuum degree threshold lower limit upper limit.

[0058] The first vacuum source in the embodiments provided in the present application may specifically be but not limited to a main vacuum source, that is, a vacuum source that is preferentially selected and used.

[0059] S103. For any of the target vacuum braking modes, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, determine whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected based on the actual vacuum degree growth rate, actual air pressure information and preset vacuum degree growth rate of the vehicle to be detected.

[0060] In this step, after determining that the vehicle to be tested needs to turn on the first vacuum source for vacuum assistance, first determine the preset vacuum growth rate based on the actual air pressure information in the current state, then calculate the actual vacuum growth rate of the vehicle to be tested in the current state, and then, based on the relationship between the preset vacuum growth rate and the actual vacuum growth rate, determine whether it is necessary to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be tested.

[0061] The second vacuum source in the embodiments provided in the present application may specifically be, but is not limited to, an auxiliary vacuum source of the first vacuum source.

[0062] The method for determining vehicle brake vacuum provided in the embodiment of the present application, compared with the prior art, determines the target vacuum braking mode of the vehicle to be detected based on the speed of the vehicle to be detected and the preset speed threshold rule, and for any target vacuum braking mode, determines whether to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected based on the actual brake vacuum information and actual air pressure information of the vehicle to be detected in the current state, and then for any target vacuum braking mode, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, determines whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected based on the actual vacuum growth rate of the vehicle to be detected, the actual air pressure information and the preset vacuum growth rate, thereby reducing the problem of slow braking vacuum, and when a single vacuum source fails, the embodiment provided by the present application can provide a vacuum source redundant backup to continue to provide vacuum assistance to the vehicle to be detected, thereby improving the practicality of the brake vacuum.

[0063] In a feasible embodiment, the target vacuum braking mode includes a first target vacuum braking mode, a second target vacuum braking mode and a third target vacuum braking mode, and step S101 includes the following sub-steps:

[0064] Sub-step 1: If the speed of the vehicle to be detected is less than a first preset speed threshold, determine that the vehicle to be detected enters a first target vacuum braking mode.

[0065] In this step, when it is determined that the vehicle speed V of the vehicle to be detected is less than the first preset vehicle speed threshold V1, it is determined that the vehicle to be detected enters the first target vacuum braking mode.

[0066] It can be understood that, it is assumed that the first target vacuum braking mode provided in the present application can be specifically but not limited to a low-speed vacuum braking mode.

[0067] Sub-step 2: If the speed of the vehicle to be detected is greater than or equal to a first preset speed threshold, and the speed of the vehicle to be detected is less than or equal to a second preset speed threshold, determine that the vehicle to be detected enters a second target vacuum braking mode.

[0068] In this step, when it is determined that the vehicle speed V of the vehicle to be detected is greater than or equal to the first preset vehicle speed threshold V1 and less than or equal to the second preset vehicle speed threshold V2, it is determined that the vehicle to be detected enters the second target vacuum braking mode.

[0069] It can be understood that the second target vacuum braking mode provided in the present application may specifically be, but not limited to, a normal vacuum braking mode.

[0070] Sub-step 3: If the speed of the vehicle to be detected is greater than a second preset speed threshold, determine that the vehicle to be detected enters a third target vacuum braking mode.

[0071] In this step, when it is determined that the vehicle speed V of the vehicle to be detected is greater than the second preset vehicle speed threshold V2, it is determined that the vehicle to be detected enters the third target vacuum braking mode.

[0072] It can be understood that the third target vacuum braking mode provided in the present application may specifically be, but not limited to, a high-speed vacuum braking mode.

[0073] In a feasible embodiment, step S102 includes the following sub-steps:

[0074] Sub-step 1: for any of the target vacuum braking modes, according to the actual air pressure information of the vehicle to be detected in the current state, determine the preset vacuum degree threshold lower limit of the vehicle to be detected in the current state.

[0075] In this step, for the first target vacuum braking mode (low-speed vacuum braking mode), the first preset vacuum degree threshold lower limit t1 of the vehicle to be detected in the current state is determined according to the actual air pressure information of the vehicle to be detected in the current state and the preset air pressure ratio; for the second target vacuum braking mode (normal vacuum braking mode), the second preset vacuum degree threshold upper limit t2 of the vehicle to be detected in the current state is determined according to the actual air pressure information vatm of the vehicle to be detected in the current state and the preset air pressure P ratio; for the third target vacuum braking mode (high-speed vacuum braking mode), the third preset vacuum degree threshold lower limit t3 of the vehicle to be detected in the current state is determined according to the actual air pressure information of the vehicle to be detected in the current state and the preset air pressure P ratio.

[0076] Among them, the preset vacuum threshold in the embodiment provided in the present application can be set to different percentages of the actual air pressure information according to different application scenarios and usage conditions, and the preset vacuum threshold range includes a preset vacuum lower limit and a preset vacuum threshold upper limit, specifically: the first preset vacuum threshold range includes a first preset vacuum threshold lower limit and a first preset vacuum threshold upper limit; the second preset vacuum threshold range includes a second preset vacuum threshold lower limit and a second preset vacuum threshold upper limit; the third preset vacuum threshold range includes a third preset vacuum threshold lower limit and a third preset vacuum threshold upper limit.

[0077] In the above, the preset vacuum degree threshold in the embodiment provided in the present application is specifically the opening and closing threshold of the vacuum source.

[0078] Sub-step 2: if the actual brake vacuum information of the vehicle to be detected in the current state is less than the preset vacuum threshold lower limit, determine to open the first vacuum source to perform vacuum assistance on the vehicle to be detected.

[0079] In this step, when the actual brake vacuum information of the vehicle to be tested in the current state is less than the preset vacuum threshold lower limit, it means that the brake vacuum in the vehicle to be tested is insufficient. At this time, the first vacuum source needs to be turned on to provide vacuum assistance to the vehicle to be tested.

[0080] Here, the embodiments provided in the present application are specifically as follows: for the first target vacuum braking mode (low-speed vacuum braking mode), when the actual braking vacuum degree vatm information of the vehicle to be detected in the current state is less than the first preset vacuum degree threshold lower limit t1, it is determined to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, that is, the main vacuum source provides vacuum assistance to the vehicle to be detected; for the second target vacuum braking mode (normal speed vacuum braking mode), when the actual braking vacuum degree vatm information of the vehicle to be detected in the current state is less than the second preset vacuum degree threshold lower limit t3, it is determined to turn on the second vacuum source to provide vacuum assistance to the vehicle to be detected, that is, the main vacuum source provides vacuum assistance to the vehicle to be detected; for the third target vacuum braking mode (high-speed vacuum braking mode), when the actual braking vacuum degree vatm information of the vehicle to be detected in the current state is less than the first preset vacuum degree threshold lower limit t5, it is determined to turn on the third vacuum source to provide vacuum assistance to the vehicle to be detected, that is, the main vacuum source provides vacuum assistance to the vehicle to be detected.

[0081] Sub-step 3: if the actual brake vacuum degree information of the vehicle to be detected in the current state is greater than or equal to the preset vacuum degree lower threshold, then re-determine the target vacuum braking mode of the vehicle to be detected.

[0082] In this step, if the actual brake vacuum information of the vehicle to be tested in the embodiment provided in the present application is greater than or equal to the preset vacuum threshold lower limit, it is necessary to re-determine whether the target vacuum braking mode of the vehicle to be tested is correct to ensure the safety of the vehicle to be tested and is applicable to any target vacuum braking mode.

[0083] In a feasible embodiment, step S103 includes the following sub-steps:

[0084] Sub-step 1: determining a preset vacuum degree increase rate of the vehicle to be detected in the current target vacuum braking mode based on actual air pressure information of the vehicle to be detected.

[0085] In this step, the embodiment provided in the present application determines a certain preset proportion of the actual air pressure information as a preset vacuum degree growth rate of the vehicle to be tested under the current target vacuum braking mode.

[0086] Sub-step 2: determining whether to activate the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be inspected based on the actual vacuum degree growth rate and the preset vacuum degree growth rate of the vehicle to be inspected.

[0087] In this step, if the actual vacuum growth rate of the vehicle to be tested is less than the preset vacuum growth rate, it is determined to open the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be tested; if the actual vacuum growth rate of the vehicle to be tested is greater than or equal to the preset vacuum growth rate, it is determined not to open the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be tested. After determining that the actual vacuum growth rate of the test vehicle is greater than or equal to the preset vacuum growth rate, the present application needs to close the vacuum assistance of the first vacuum source and the second vacuum source to the vehicle to be tested, i.e., stop the vacuum assistance of the first vacuum source and the second vacuum source to the vehicle to be tested, based on whether the actual brake vacuum information of the vehicle to be tested in the current state is greater than or equal to the preset vacuum threshold upper limit, and when the actual brake vacuum information is greater than or equal to the preset vacuum threshold upper limit.

[0088] The second vacuum source in the embodiment provided in the present application is an auxiliary vacuum source of the vehicle to be detected.

[0089] In the above, it is assumed that the embodiment provided by the present application is specifically as follows: for the first target vacuum braking mode (low-speed vacuum braking mode), if the actual vacuum degree growth rate R of the vehicle to be detected is less than the first preset vacuum degree growth rate r1, it is determined to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected; if the actual vacuum degree growth rate R of the vehicle to be detected is greater than or equal to the preset vacuum degree growth rate r1, it is continued to be determined whether the actual braking vacuum degree information Vatm of the vehicle to be detected in the current state is greater than or equal to the preset vacuum degree threshold upper limit t2. If so, the vacuum assistance of the first vacuum source and the second vacuum source to the vehicle to be detected is turned off.

[0090] For the second target vacuum braking mode (normal vacuum braking mode), if the actual vacuum growth rate R of the vehicle to be tested is less than the second preset vacuum growth rate r2, it is determined to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be tested; if the actual vacuum growth rate R of the vehicle to be tested is greater than or equal to the preset vacuum growth rate r2, continue to judge whether the actual braking vacuum information Vatm of the vehicle to be tested in the current state is greater than or equal to the preset vacuum threshold upper limit t4. If so, turn off the first vacuum source and the second vacuum source to provide vacuum assistance to the vehicle to be tested.

[0091] For the third target vacuum braking mode (normal vacuum braking mode), if the actual vacuum growth rate R of the vehicle to be tested is less than the third preset vacuum growth rate r3, it is determined to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be tested; if the actual vacuum growth rate R of the vehicle to be tested is greater than or equal to the preset vacuum growth rate r3, it is continued to be determined whether the actual braking vacuum information Vatm of the vehicle to be tested in the current state is greater than or equal to the preset vacuum threshold upper limit t6. If so, the first vacuum source and the second vacuum source are turned off to provide vacuum assistance to the vehicle to be tested.

[0092] See also Figure 2 , Figure 2 FIG. 1 shows a flow chart of an embodiment of a method for determining a vehicle brake vacuum provided in an embodiment of the present application. Figure 2 As shown, it is assumed that the embodiment provided by the present application divides the vehicle speed V into three levels and determines three target vacuum braking modes, namely: a low-speed target vacuum braking mode, a normal low-speed target vacuum braking mode and a high-speed low-speed target vacuum braking mode, as follows:

[0093] The embodiment provided in the present application first receives the vehicle speed V, actual brake vacuum information Vatm and actual air pressure information P of the vehicle to be detected, and then determines the relationship between the vehicle speed V of the vehicle to be detected and the first preset speed threshold V1. For example, the first preset speed threshold V1 is 15km / h. If the vehicle speed V of the vehicle to be detected is less than 15km / h, the low-speed target vacuum braking mode is entered. The vacuum pump opening threshold corresponding to the low-speed target vacuum braking mode is the first preset vacuum threshold lower limit t1, and the vacuum pump closing threshold is the first preset vacuum threshold upper limit t2. The relationship between the actual brake vacuum information Vatm and the preset first preset vacuum threshold lower limit t1 is determined; if the vehicle speed V of the vehicle to be detected is ≥15km / h, the relationship between the vehicle speed V of the vehicle to be detected and the second preset speed threshold V2 is determined. For example, the second preset vehicle speed threshold V2 is 120km / h; if the vehicle speed V of the vehicle to be detected is less than 120km / h, the normal vacuum braking mode is entered, and the vacuum pump opening threshold corresponding to the normal vacuum braking mode is the second preset vacuum threshold lower limit t3, and the vacuum pump closing threshold is the second preset vacuum threshold upper limit t4, and the relationship between the actual braking vacuum information Vatm and the preset second preset vacuum threshold lower limit t3 is judged; if the vehicle speed V of the vehicle to be detected is greater than or equal to 120km / h, the high-speed vacuum braking mode is entered, and the vacuum pump opening threshold corresponding to the high-speed vacuum braking mode is the third preset vacuum threshold lower limit t5, and the vacuum pump closing threshold is the third preset vacuum threshold upper limit t6, and the relationship between the actual braking vacuum information Vatm and the preset third preset vacuum threshold lower limit t5 is judged.

[0094] In the low-speed target vacuum braking mode, for example, the first preset vacuum threshold lower limit t1 is preset to 50% of the actual air pressure information; if the actual brake vacuum information Vatm is less than 50% of the actual air pressure information, the main vacuum source is started; if the actual brake vacuum information Vatm is ≥ 50% of the actual air pressure information, return to the previous level; determine the relationship between the actual vacuum growth rate R and the first preset vacuum growth rate r1, for example, the first preset vacuum growth rate r1 is 15% of the actual air pressure information; if the actual vacuum growth rate R is ≥ 15% of the actual air pressure information, determine The relationship between the actual braking vacuum information Vatm and the first preset vacuum threshold upper limit t2; if the actual vacuum growth rate R is less than 15% of the actual air pressure information, start the auxiliary vacuum source; determine the relationship between the actual braking vacuum information Vatm and the preset first preset vacuum threshold upper limit t2, for example, the preset first preset vacuum threshold upper limit t2 is 70% of the actual air pressure information; if the actual braking vacuum information Vatm is less than 70% of the actual air pressure information, return to the previous level; if the actual braking vacuum information Vatm is ≥70% of the actual air pressure information, turn off the vacuum source.

[0095] In the normal vacuum braking mode, for example, the second preset vacuum threshold lower limit t3 is 55% of the actual air pressure information; if the actual brake vacuum information Vatm is less than 55% of the actual air pressure information, start the main vacuum source; if the actual brake vacuum information Vatm is ≥ 55% of the actual air pressure information, return to the previous level; judge the relationship between the actual vacuum growth rate R and the second preset vacuum growth rate r2, for example, the second preset vacuum growth rate r2 is 17% of the actual air pressure information; if the actual vacuum growth rate R is ≥ 17% of the actual air pressure information, judge the actual brake The relationship between the dynamic vacuum information Vatm and the preset second preset vacuum threshold upper limit t4; if the actual vacuum growth rate R is less than 17% of the actual air pressure information, start the auxiliary vacuum source; determine the relationship between the actual braking vacuum information Vatm and the preset second preset vacuum threshold upper limit t4, for example, the preset second preset vacuum threshold upper limit t4 is 75% of the actual air pressure information; if the actual braking vacuum information Vatm is less than 75% of the actual air pressure information, return to the previous level; if the actual braking vacuum information Vatm is ≥75% of the actual air pressure information, turn off the vacuum source.

[0096] In high-speed vacuum braking mode, for example, the third preset vacuum degree threshold lower limit t5 is preset to 60% of the actual air pressure information; if the actual brake vacuum degree information Vatm is less than 60% of the actual air pressure information, start the main vacuum source; if the actual brake vacuum degree information Vatm is ≥ 60% of the actual air pressure information, return to the previous level; determine the relationship between the actual vacuum degree growth rate R and the third preset vacuum degree growth rate r3, for example, the third preset vacuum degree growth rate r3 is 20% of the actual air pressure information; if the actual vacuum degree growth rate R is ≥ 20% of the actual air pressure information, determine the actual The relationship between the braking vacuum information Vatm and the preset third preset vacuum threshold upper limit t6; if the actual vacuum growth rate R is less than 20% of the actual air pressure information, start the auxiliary vacuum source; determine the relationship between the actual braking vacuum information Vatm and the preset third preset vacuum threshold upper limit t6, for example, the preset third preset vacuum threshold upper limit t6 is 80% of the actual air pressure information; if the actual braking vacuum information Vatm is less than 80% of the actual air pressure information, return to the previous level; if the actual braking vacuum information Vatm is ≥80% of the actual air pressure information, turn off the vacuum source.

[0097] See also Figure 3 , Figure 3 FIG. 1 shows a flowchart of another embodiment of a method for determining a vehicle brake vacuum provided in an embodiment of the present application. Figure 3 As shown, it is assumed that the embodiment provided by the present application divides the vehicle speed V into two levels and determines two target vacuum braking modes, namely: a normal low-speed target vacuum braking mode and a high-speed low-speed target vacuum braking mode, as follows:

[0098] First, the vehicle speed V, actual brake vacuum information Vatm and actual air pressure information P of the vehicle to be detected are received, and then the relationship between the vehicle speed V of the vehicle to be detected and the first preset speed threshold V1 is determined, for example, the first preset speed threshold V1 is 90km / h; if the vehicle speed V of the vehicle to be detected is less than 90km / h, the normal vacuum braking mode is entered, and the vacuum pump opening threshold corresponding to the normal vacuum braking mode is the first preset vacuum threshold lower limit t1, and the vacuum pump closing threshold is the first preset vacuum threshold upper limit t2, and the relationship between the actual brake vacuum information Vatm and the preset first preset vacuum threshold lower limit t1 is determined; if the vehicle speed V of the vehicle to be detected is greater than or equal to 90km / h, the high-speed vacuum braking mode is entered, and the vacuum pump opening threshold corresponding to the high-speed vacuum braking mode is the second preset vacuum threshold lower limit t3, and the vacuum pump closing threshold is the second preset vacuum threshold upper limit t4, and the relationship between the actual brake vacuum information Vatm and the preset second preset vacuum threshold lower limit t3 is determined.

[0099] In the normal vacuum braking mode, for example, the first preset vacuum degree threshold lower limit t1 is preset to 55% of the actual air pressure information; if the actual brake vacuum degree information Vatm is less than 55% of the actual air pressure information, the main vacuum source is started; if the actual brake vacuum degree information Vatm is greater than or equal to 55% of the actual air pressure information, the previous level is returned; the relationship between the actual vacuum degree growth rate R and the first preset vacuum degree growth rate r1 is determined, for example, the first preset vacuum degree growth rate r1 is 17% of the actual air pressure information / s; if the actual vacuum degree growth rate R is greater than or equal to 17% of the actual air pressure information / s, the actual vacuum degree growth rate is determined. The relationship between the actual braking vacuum information Vatm and the preset first preset vacuum threshold upper limit t2; if the actual vacuum growth rate R is less than 17% of the actual air pressure information / s, start the auxiliary vacuum source; judge the relationship between the actual braking vacuum information Vatm and the preset first preset vacuum threshold upper limit t2, for example, the preset first preset vacuum threshold upper limit t2 is 75% of the actual air pressure information; if the actual braking vacuum information Vatm is less than 75% of the actual air pressure information, return to the previous level; if the actual braking vacuum information Vatm is ≥70% of the actual air pressure information, turn off the vacuum source.

[0100] In high-speed vacuum braking mode, for example, the second preset vacuum threshold lower limit t3 is preset to 60% of the actual air pressure information; if the actual brake vacuum information Vatm is less than 60% of the actual air pressure information, the main vacuum source is started; if the actual brake vacuum information Vatm is ≥ 60% of the actual air pressure information, the previous level is returned; the relationship between the actual vacuum growth rate R and the second preset vacuum growth rate r2 is determined, for example, the second preset vacuum growth rate r2 is 20% of the actual air pressure information / s; if the actual vacuum growth rate R is ≥ 20% of the actual air pressure information / s, the actual vacuum growth rate is determined. The relationship between the actual braking vacuum information Vatm and the preset second preset vacuum threshold upper limit t4; if the actual vacuum growth rate R is less than 20% of the actual air pressure information / s, start the auxiliary vacuum source; judge the relationship between the actual braking vacuum information Vatm and the preset second preset vacuum threshold upper limit t4, for example, the preset second preset vacuum threshold upper limit t4 is 80% of the actual air pressure information; if the actual braking vacuum information Vatm is less than 80% of the actual air pressure information, return to the previous level; if the actual braking vacuum information Vatm is ≥80% of the actual air pressure information, turn off the vacuum source.

[0101] The method for determining vehicle brake vacuum provided in the embodiment of the present application, compared with the prior art, determines the target vacuum braking mode of the vehicle to be detected based on the speed of the vehicle to be detected and the preset speed threshold rule, and for any target vacuum braking mode, determines whether to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected based on the actual brake vacuum information and actual air pressure information of the vehicle to be detected in the current state, and then for any target vacuum braking mode, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, determines whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected based on the actual vacuum growth rate, actual air pressure information and preset vacuum growth rate of the vehicle to be detected, thereby reducing the problem of slow braking vacuum, and when a single vacuum source fails, the embodiment provided by the present application can provide a vacuum source redundant backup to continue to provide vacuum assistance to the vehicle to be detected, thereby improving the practicality of the brake vacuum, and the present application can provide a vacuum source redundant backup, thereby improving the boosting function of the brake vacuum of the vehicle to be detected.

[0102] See also Figure 4 , Figure 4 FIG. 4 shows a structural block diagram of a vehicle brake vacuum determination system provided by an embodiment of the present application. Figure 4As shown, a system for determining vehicle brake vacuum includes: a controller, a vacuum degree detection device, an air pressure detection device, a first vacuum source, a second vacuum source, a control valve device and a vacuum booster, wherein the vacuum degree detection device, the air pressure detection device, the first vacuum source and the second vacuum source are all communicatively connected to the controller, and the first vacuum source and the second vacuum source are both communicatively connected to the vacuum booster via the control valve device.

[0103] In the above, the air pressure detection equipment in the embodiments provided by the present application includes but is not limited to an atmospheric pressure sensor, wherein the atmospheric pressure sensor is installed in the atmospheric cavity of the vacuum booster (wherein the atmospheric pressure sensor can be installed in the atmospheric cavity of the vacuum booster, or can be installed in other positions of the vehicle. Here, in the embodiments provided by the present application, it is preferably installed in the atmospheric cavity of the vacuum booster) for uploading an atmospheric pressure signal. The embodiments provided by the present application convert a preset atmospheric pressure threshold value into a preset vacuum threshold value; the vacuum detection equipment includes but is not limited to a vacuum sensor.

[0104] Among them, the first vacuum source (main vacuum source) and the second vacuum source (auxiliary vacuum source) operate independently, and the first vacuum source and the second vacuum source both use electric vacuum pumps, such as vane-type electric vacuum pumps, diaphragm-type electric vacuum pumps, and piston-type electric vacuum pumps, etc. Mechanical vacuum pumps can also be used. The mechanical vacuum pump can be equipped with a clutch device, and an internal combustion engine intake manifold can also be used.

[0105] Here, the control valve device in the embodiment provided in the present application can be specifically a one-way valve, and the one-way valve can adopt a single one-way valve with one air inlet and one air outlet, or an integrated one-way valve with one air inlet and two air outlets; if a single one-way valve with one air inlet and one air outlet is adopted, two one-way valves are required, one one-way valve outlet is connected to the main vacuum source through a vacuum pipeline, the air inlet is connected to the vacuum chamber of the vacuum booster through the vacuum pipeline, and the other one-way valve outlet is connected to the auxiliary vacuum source through the vacuum pipeline, and the air inlet is connected to the vacuum chamber of the vacuum booster through the vacuum pipeline; if an integrated one-way valve with one air inlet and two air outlets is adopted, one outlet is connected to the main vacuum source through the vacuum pipeline, the other outlet is connected to the auxiliary vacuum source through the vacuum pipeline, and the air inlet is connected to the vacuum chamber of the vacuum booster through the vacuum pipeline.

[0106] See also Figure 5 , Figure 5 FIG. 4 shows a structural block diagram of a vehicle brake vacuum determination device provided by an embodiment of the present application. Figure 5 As shown, the vehicle brake vacuum determination device 500 includes:

[0107] The first determination module 510 is used to determine a target vacuum braking mode of the vehicle to be detected based on the vehicle speed of the vehicle to be detected and a preset vehicle speed threshold rule.

[0108] The second determination module 520 is used to determine whether to turn on the first vacuum source to perform vacuum assistance on the vehicle to be detected based on actual brake vacuum information and actual air pressure information of the vehicle to be detected in a current state for any of the target vacuum braking modes.

[0109] The third determination module 530 is used to determine whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected for any of the target vacuum braking modes, based on the actual vacuum degree growth rate, actual air pressure information and preset vacuum degree growth rate of the vehicle to be detected, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected.

[0110] In one embodiment, the target vacuum braking mode includes a first target vacuum braking mode, a second target vacuum braking mode, and a third target vacuum braking mode. The first determination module 510 is specifically configured to:

[0111] If the speed of the vehicle to be detected is less than a first preset speed threshold, it is determined that the vehicle to be detected enters a first target vacuum braking mode.

[0112] If the vehicle speed of the vehicle to be detected is greater than or equal to a first preset vehicle speed threshold, and the vehicle speed of the vehicle to be detected is less than or equal to a second preset vehicle speed threshold, it is determined that the vehicle to be detected enters a second target vacuum braking mode.

[0113] If the vehicle speed of the vehicle to be detected is greater than a second preset vehicle speed threshold, it is determined that the vehicle to be detected enters a third target vacuum braking mode.

[0114] In one embodiment, the second determining module 520 is specifically configured to:

[0115] For any of the target vacuum braking modes, the preset vacuum degree threshold lower limit of the vehicle to be detected in the current state is determined according to the actual air pressure information of the vehicle to be detected in the current state.

[0116] If the actual brake vacuum information of the vehicle to be detected in the current state is less than the preset vacuum threshold lower limit, it is determined to open the first vacuum source to perform vacuum assistance on the vehicle to be detected.

[0117] If the actual brake vacuum degree information of the vehicle to be detected in the current state is greater than or equal to the preset vacuum degree threshold lower limit, the target vacuum braking mode of the vehicle to be detected is re-determined.

[0118] In one embodiment, the third determination module 530 is specifically configured to:

[0119] Based on the actual air pressure information of the vehicle to be detected, a preset vacuum degree increase rate of the vehicle to be detected in the current target vacuum braking mode is determined.

[0120] Based on the actual vacuum degree growth rate of the detected vehicle and the preset vacuum degree growth rate, it is determined whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the detected vehicle.

[0121] In one embodiment, the determining whether to turn on the second vacuum source to perform auxiliary vacuum assistance on the vehicle to be detected based on the actual vacuum degree growth rate and the preset vacuum degree growth rate of the detected vehicle includes:

[0122] If the actual vacuum degree growth rate of the vehicle to be detected is less than the preset vacuum degree growth rate, it is determined to open the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected.

[0123] If the actual vacuum degree growth rate of the vehicle to be detected is greater than or equal to the preset vacuum degree growth rate, it is determined not to open the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected.

[0124] In one embodiment, after determining that the second vacuum source is not turned on to assist the vehicle to be detected in vacuum assistance if the actual vacuum degree growth rate of the vehicle to be detected is greater than or equal to the preset vacuum degree growth rate, the method for determining the vehicle brake vacuum further includes:

[0125] After determining that the actual vacuum degree growth rate of the detected vehicle is greater than or equal to the preset vacuum degree growth rate, based on whether the actual brake vacuum degree information of the detected vehicle in the current state is greater than or equal to the preset vacuum degree threshold upper limit.

[0126] If so, the vacuum assistance provided by the first vacuum source and the second vacuum source to the vehicle to be detected is turned off.

[0127] The vehicle brake vacuum determination device 500 provided in the embodiment of the present application, compared with the prior art, determines the target vacuum braking mode of the vehicle to be detected based on the speed of the vehicle to be detected and the preset speed threshold rule, and for any target vacuum braking mode, determines whether to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected based on the actual brake vacuum information and the actual air pressure information of the vehicle to be detected in the current state, and then for any target vacuum braking mode, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, determines whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected based on the actual vacuum growth rate, the actual air pressure information and the preset vacuum growth rate of the vehicle to be detected, thereby reducing the problem of slow braking vacuum, and when a single vacuum source fails, the embodiment provided by the present application can provide a vacuum source redundant backup to continue to provide vacuum assistance to the vehicle to be detected, thereby improving the practicality of the brake vacuum, and the present application can provide a vacuum source redundant backup, thereby improving the boosting function of the brake vacuum of the vehicle to be detected.

[0128] See also Figure 6 , Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the electronic device 600 includes a processor 610 , a memory 620 , and a bus 630 .

[0129] The memory 620 stores machine-readable instructions executable by the processor 610. When the electronic device 600 is running, the processor 610 communicates with the memory 620 via the bus 630. When the machine-readable instructions are executed by the processor 610, the above-mentioned Figures 1 to 3 The specific implementation of the steps of the method for determining the vehicle brake vacuum in the method embodiment shown can be found in the method embodiment, which will not be repeated here.

[0130] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figures 1 to 3 The specific implementation of the steps of the method for determining the vehicle brake vacuum in the method embodiment shown can be found in the method embodiment, which will not be repeated here.

[0131] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0132] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0133] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0134] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0135] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0136] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0137] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes the process of a method for determining vehicle brake vacuum of a solid state hard disk controller.

[0138] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instruction can be transmitted from a website site, a computer, a server or a data center by wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. Available media can be magnetic media, (for example, floppy disk, hard disk, tape), optical media (for example, DVD), or semiconductor media (for example, solid-state drive (SSD)) and the like.

[0139] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0140] In the several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0141] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0142] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0143] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

[0144] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0145] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0146] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for determining a vehicle brake vacuum, characterized in that: The method for determining the vehicle brake vacuum comprises: Determining a target vacuum braking mode of the vehicle to be detected based on the vehicle speed of the vehicle to be detected and a preset vehicle speed threshold rule; For any of the target vacuum braking modes, determining whether to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected based on actual brake vacuum information and actual air pressure information of the vehicle to be detected in the current state; For any of the target vacuum braking modes, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected, it is determined whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected based on the actual vacuum growth rate, actual air pressure information and preset vacuum growth rate of the vehicle to be detected.

2. The method for determining vehicle brake vacuum according to claim 1, characterized in that: The target vacuum braking mode includes a first target vacuum braking mode, a second target vacuum braking mode and a third target vacuum braking mode. The target vacuum braking mode of the vehicle to be detected is determined based on the vehicle speed to be detected and a preset vehicle speed threshold rule, including: If the speed of the vehicle to be detected is less than a first preset speed threshold, determining that the vehicle to be detected enters a first target vacuum braking mode; If the speed of the vehicle to be detected is greater than or equal to a first preset speed threshold, and the speed of the vehicle to be detected is less than or equal to a second preset speed threshold, determining that the vehicle to be detected enters a second target vacuum braking mode; If the vehicle speed of the vehicle to be detected is greater than a second preset vehicle speed threshold, it is determined that the vehicle to be detected enters a third target vacuum braking mode.

3. The method for determining vehicle brake vacuum according to claim 1, characterized in that: The determining whether to turn on the first vacuum source to perform vacuum assistance on the vehicle to be detected based on actual brake vacuum information and actual air pressure information of the vehicle to be detected in a current state for any of the target vacuum braking modes includes: For any of the target vacuum braking modes, determining a preset vacuum degree threshold lower limit of the vehicle to be detected in the current state according to actual air pressure information of the vehicle to be detected in the current state; If the actual brake vacuum information of the vehicle to be detected in the current state is less than the preset vacuum threshold lower limit, determining to open the first vacuum source to perform vacuum assistance on the vehicle to be detected; If the actual brake vacuum degree information of the vehicle to be detected in the current state is greater than or equal to the preset vacuum degree threshold lower limit, the target vacuum braking mode of the vehicle to be detected is re-determined.

4. The method for determining vehicle brake vacuum according to claim 1, characterized in that: The determining whether to turn on the second vacuum source to perform auxiliary vacuum assistance on the vehicle to be detected based on the actual vacuum degree growth rate, the actual air pressure information and the preset vacuum degree growth rate of the vehicle to be detected includes: Determining a preset vacuum degree growth rate of the vehicle to be detected under a current target vacuum braking mode based on actual air pressure information of the vehicle to be detected; Based on the actual vacuum degree growth rate of the detected vehicle and the preset vacuum degree growth rate, it is determined whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the detected vehicle.

5. The method for determining vehicle brake vacuum according to claim 4, characterized in that: The determining whether to start the second vacuum source to perform auxiliary vacuum assistance on the vehicle to be detected based on the actual vacuum degree growth rate and the preset vacuum degree growth rate of the detected vehicle includes: If the actual vacuum degree growth rate of the vehicle to be detected is less than the preset vacuum degree growth rate, determining to open the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected; If the actual vacuum degree growth rate of the vehicle to be detected is greater than or equal to the preset vacuum degree growth rate, it is determined not to open the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected.

6. The method for determining vehicle brake vacuum according to claim 5, characterized in that: After determining not to open the second vacuum source to perform auxiliary vacuum assistance on the vehicle to be detected if the actual vacuum degree growth rate of the vehicle to be detected is greater than or equal to the preset vacuum degree growth rate, the method for determining the vehicle brake vacuum further includes: After determining that the actual vacuum degree growth rate of the detected vehicle is greater than or equal to the preset vacuum degree growth rate, based on whether the actual brake vacuum degree information of the detected vehicle in the current state is greater than or equal to the preset vacuum degree threshold upper limit; If so, the vacuum assistance provided by the first vacuum source and the second vacuum source to the vehicle to be detected is turned off.

7. A vehicle brake vacuum determination system, characterized in that: The vehicle brake vacuum determination system includes: a controller, a vacuum degree detection device, an air pressure detection device, a first vacuum source, a second vacuum source, a control valve device and a vacuum booster. The vacuum degree detection device, the air pressure detection device, the first vacuum source and the second vacuum source are all communicatively connected to the controller, and the first vacuum source and the second vacuum source are both communicatively connected to the vacuum booster via the control valve device.

8. A device for determining a vehicle brake vacuum, characterized in that: The vehicle brake vacuum determination device comprises: A first determination module, configured to determine a target vacuum braking mode of the vehicle to be detected based on the vehicle speed of the vehicle to be detected and a preset vehicle speed threshold rule; A second determination module is used to determine whether to turn on the first vacuum source to perform vacuum assistance on the vehicle to be detected based on actual brake vacuum information and actual air pressure information of the vehicle to be detected in a current state for any of the target vacuum braking modes; The third determination module is used to determine whether to turn on the second vacuum source to provide auxiliary vacuum assistance to the vehicle to be detected for any of the target vacuum braking modes, based on the actual vacuum growth rate, actual air pressure information and preset vacuum growth rate of the vehicle to be detected, after it is necessary to turn on the first vacuum source to provide vacuum assistance to the vehicle to be detected.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate via the bus, and the machine-readable instructions are executed by the processor to execute the steps of the method for determining the vehicle brake vacuum as described in any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: The computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for determining the vehicle brake vacuum as claimed in any one of claims 1 to 6 are executed.

Images