Vacuum assistance fault processing method, device, equipment and medium

Abstract

The invention discloses a vacuum boosting fault processing method, device and equipment and a medium. The vacuum boosting fault processing method comprises the following steps: collecting multi-dimensional state data of a new energy vehicle; determining fault diagnosis conditions of a vacuum degree sensor fault, a mild leakage fault, a serious leakage fault, an extremely low vacuum degree fault and a vacuum pump working overtime fault, and determining three fault processing modes; and according to the multi-dimensional state data of the new energy vehicle and fault diagnosis conditions, a current vehicle fault processing mode is matched from the three types of fault processing modes, and according to the current vehicle fault processing mode, vacuum pump fault processing is automatically carried out. According to the technical scheme, the vacuum pump faults can be subjected to fine-grained distinguishing, the processing modes of the vacuum pump faults are enriched, and the driving safety coefficient of the new energy automobile is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a vacuum booster fault processing method, device, equipment and medium. Background Art

[0002] With the continuous development of new energy vehicle technology in recent years, pure electric vehicles are becoming more and more popular. Compared with fuel vehicles, they reduce noise and environmental pollution, and the cost of using vehicles is also greatly reduced. Of course, as the sales of pure electric vehicles continue to rise, related safety issues have also attracted people's attention. If the brakes fail while driving, it will lead to serious consequences, but these accidents are inevitable in daily life. Therefore, how to minimize the harm to people in the car after the risk occurs has become an urgent problem to be solved.

[0003] As for the control of brake vacuum pump, most of them use VCU (Vehicle control unit) to collect the voltage signal of vacuum sensor, convert it into relevant atmospheric pressure and vacuum pressure signal, and then obtain the opening and closing threshold under the current atmospheric pressure according to the atmospheric pressure table to control the opening and closing of vacuum pump. The processing mode is relatively simple, for example, starting from the operation mode of vacuum pump itself, the start and stop time of continuous operation of vacuum pump is controlled to prevent the vehicle from suddenly losing brake assist.

[0004] Although the brake assist can be alleviated to a certain extent by adjusting the working mode of the vacuum pump to ensure a certain vacuum degree when a fault occurs, it is not applicable to all driving conditions and different types of vacuum pump failures. If a single method of adjusting the working mode of the vacuum pump is still adopted to obtain sufficient vacuum degree without considering other safety auxiliary measures to ensure the stable operation of the vehicle, there will always be safety hazards. Summary of the invention

[0005] The present invention provides a vacuum booster fault handling method, device, equipment and medium to solve the problem that the current new energy vehicle vacuum pump fault handling mode is single, resulting in great safety hazards.

[0006] According to one aspect of the present invention, a vacuum booster fault processing method is provided, comprising:

[0007] Collect multi-dimensional status data of new energy vehicles;

[0008] Determine the fault diagnosis conditions for vacuum sensor failure, slight leakage failure, severe leakage failure, extremely low vacuum failure, and vacuum pump overtime failure, and determine three types of fault handling modes;

[0009] According to the multi-dimensional status data of the new energy vehicle and the fault diagnosis conditions, the current vehicle fault handling mode is matched from the three types of fault handling modes, and the vacuum pump fault handling is automatically performed according to the current vehicle fault handling mode.

[0010] According to another aspect of the present invention, a vacuum booster fault processing device is provided, comprising:

[0011] Vehicle status collection module, used to collect multi-dimensional status data of new energy vehicles;

[0012] Fault diagnosis configuration module, used to determine the fault diagnosis conditions of vacuum sensor fault, slight leakage fault, severe leakage fault, extremely low vacuum fault and vacuum pump working timeout fault, and determine three types of fault handling modes;

[0013] The fault processing module is used to match the current vehicle fault processing mode from three types of fault processing modes according to the multi-dimensional status data of the new energy vehicle and the fault diagnosis conditions, and automatically perform vacuum pump fault processing according to the current vehicle fault processing mode.

[0014] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0015] at least one processor; and

[0016] a memory communicatively connected to the at least one processor; wherein,

[0017] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the vacuum boost fault handling method described in any embodiment of the present invention.

[0018] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the vacuum boost fault handling method described in any embodiment of the present invention when executed.

[0019] The technical solution of the embodiment of the present invention determines the fault diagnosis conditions of vacuum sensor fault, slight leakage fault, severe leakage fault, extremely low vacuum fault and vacuum pump working timeout fault by collecting multi-dimensional status data of new energy vehicles, and determines three types of fault handling modes, and then matches the current vehicle fault handling mode from the three types of fault handling modes according to the multi-dimensional status data of new energy vehicles and the fault diagnosis conditions, and automatically handles the vacuum pump fault according to the current vehicle fault handling mode. In this solution, the vacuum pump fault is divided into more fine-grained levels, and more abundant vacuum pump fault handling modes are determined, so that after clarifying the current vehicle fault handling mode, the vacuum pump fault is automatically handled in a targeted manner, which solves the problem of large safety hazards caused by the single vacuum pump fault handling mode of the current new energy vehicle, and can make fine-grained distinctions between vacuum pump faults, enrich the vacuum pump fault handling mode, and improve the driving safety factor of new energy vehicles.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A flow chart of a vacuum boost fault processing method provided in Embodiment 1 of the present invention;

[0023] Figure 2 A schematic diagram of a vacuum pump fault handling process provided in Embodiment 2 of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a vacuum booster fault handling device provided in Embodiment 3 of the present invention;

[0025] Figure 4 A schematic diagram of the structure of an electronic device that can be used to implement an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] Embodiment 1

[0029] Figure 1 This is a flow chart of a vacuum boost fault handling method provided in the first embodiment of the present invention. This embodiment can be applied to the situation of improving the safety factor of new energy driving. The method can be executed by a vacuum boost fault handling device. The vacuum boost fault handling device can be implemented in the form of hardware and / or software. The vacuum boost fault handling device can be configured in an electronic device. For example, the electronic device can be a vehicle-mounted controller. Figure 1 As shown, the method includes:

[0030] Step 110: Collect multi-dimensional status data of new energy vehicles.

[0031] The multi-dimensional state data of new energy vehicles may be the driving state associated data of the current new energy vehicle. For example, the multi-dimensional state data of new energy vehicles may include but are not limited to vehicle speed signal, brake pedal state, accelerator pedal state, gear state, power battery fault state, motor fault state, and vacuum pump fault state signal.

[0032] In the embodiment of the present invention, the multi-dimensional status data of the new energy vehicle can be collected in real time and monitored through the vehicle controller.

[0033] Step 120: determine the fault diagnosis conditions of vacuum sensor fault, slight leakage fault, severe leakage fault, extremely low vacuum fault and vacuum pump working timeout fault, and determine three types of fault handling modes.

[0034] Among them, the vacuum sensor failure may be a fault type in which the vacuum pump has abnormal vacuum collection and calculation. A slight leakage fault may be a fault type in which the vacuum pump has a slight leakage. A serious leakage fault may be a fault type in which the vacuum pump has a serious leakage. An extremely low vacuum fault may be a fault type in which the vacuum in the vacuum pump is extremely low. A vacuum pump overtime fault may be a fault type in which the vacuum pump overtimes. The fault handling mode can be understood as a fault handling strategy, which is used to solve the risk of vehicle loss of control when the vehicle's braking force is insufficient, and can also provide timely warnings to neighboring vehicles. It should be noted that the definitions of slight leakage, serious leakage and extremely low vacuum meet industry definition standards.

[0035] In an embodiment of the present invention, the technicians can obtain the fine-grained classification results of vacuum pump faults and the corresponding fault judgment conditions, that is, the fault diagnosis conditions of vacuum sensor faults, mild leakage faults, severe leakage faults, extremely low vacuum faults and vacuum pump working timeout faults, and further summarize and cluster the processing strategies for different vacuum pump faults according to the solution strategies for each type of fault, and obtain three types of fault processing modes.

[0036] Optionally, technical personnel can pre-configure fault handling strategies corresponding to vacuum sensor failure, mild leakage failure, severe leakage failure, extremely low vacuum failure, and vacuum pump operation timeout failure, so as to cluster and summarize the fault types corresponding to the same fault handling strategy to map the aforementioned faults to three types of fault handling modes.

[0037] Alternatively, based on the automobile fault maintenance simulation software, the fault handling strategies corresponding to vacuum sensor failure, mild leakage failure, severe leakage failure, extremely low vacuum failure and vacuum pump working timeout failure can be determined, and based on the machine learning model technology, the corresponding strategies of these fault types can be grouped to obtain three types of fault handling modes.

[0038] Step 130: According to the multi-dimensional state data of the new energy vehicle and the fault diagnosis conditions, the current vehicle fault processing mode is matched from the three types of fault processing modes, and the vacuum pump fault processing is automatically performed according to the current vehicle fault processing mode.

[0039] Among them, the current vehicle fault handling mode can be one of the three types of fault handling modes.

[0040] In an embodiment of the present invention, the multi-dimensional status data of new energy vehicles can be analyzed based on fault diagnosis conditions to determine the type of fault existing in the current vehicle vacuum pump, thereby matching the current vehicle fault handling mode from three types of fault handling modes based on the mapping relationship between the fault type and the fault handling mode, and further utilizing the current vehicle fault handling mode to automatically perform vacuum pump fault handling.

[0041] The technical solution of the embodiment of the present invention determines the fault diagnosis conditions of vacuum sensor fault, slight leakage fault, severe leakage fault, extremely low vacuum fault and vacuum pump working timeout fault by collecting multi-dimensional status data of new energy vehicles, and determines three types of fault handling modes, and then matches the current vehicle fault handling mode from the three types of fault handling modes according to the multi-dimensional status data of new energy vehicles and the fault diagnosis conditions, and automatically handles the vacuum pump fault according to the current vehicle fault handling mode. In this solution, the vacuum pump fault is divided into more fine-grained levels, and more abundant vacuum pump fault handling modes are determined, so that after clarifying the current vehicle fault handling mode, the vacuum pump fault is automatically handled in a targeted manner, which solves the problem of large safety hazards caused by the single vacuum pump fault handling mode of the current new energy vehicle, and can make fine-grained distinctions between vacuum pump faults, enrich the vacuum pump fault handling mode, and improve the driving safety factor of new energy vehicles.

[0042] Embodiment 2

[0043] This embodiment is specific based on the above embodiment, and the content is introduced as follows:

[0044] In an optional embodiment of the present invention, determining the fault diagnosis conditions of a vacuum sensor failure, a minor leakage failure, a serious leakage failure, an extremely low vacuum failure, and a vacuum pump working timeout failure may include: taking the vacuum sensor voltage signal being less than the voltage lower limit threshold, or greater than the voltage upper limit threshold, within a first time period as the fault diagnosis condition for the vacuum sensor failure; taking the vacuum pump being not enabled, the brake pedal not being depressed, and there being no vacuum sensor failure within a second time period, the vacuum pump being leaked and the vacuum pumping time being less than the normal vacuum pumping working time upper limit threshold, and the current average vacuum pressure change rate being less than the experimental mean of the vacuum pressure change rate as the fault diagnosis conditions for a minor leakage failure.

[0045] Among them, the first duration and the second duration can be two different durations that are preset. The first duration is less than the second duration. For example, the first duration can be 500ms, and the second duration can be 10s. The specific durations of the first duration and the second duration can be calibrated as needed, and there is no limitation on this. The voltage lower limit threshold can be the lower limit voltage value compared with the voltage signal of the vacuum sensor. The voltage upper limit threshold can be the upper limit voltage value compared with the voltage signal of the vacuum sensor. The vacuum pumping time when the vacuum pump leaks can be the time when the vacuum pump is pumped to the vacuum pump closing threshold in the leaking state. The normal vacuum pumping working time upper limit threshold can be the maximum working time from the start of work to the end of vacuum pumping when the vacuum pump works normally. The current average rate of change of vacuum pressure can be the average rate of change of the current vacuum pressure of the vacuum pump per second. For example, the difference between the current vacuum pressure of the vacuum pump and the vacuum pressure after 10 seconds (which can be adjusted according to the second duration) can be divided by 10 to obtain the current average rate of change of vacuum pressure. The experimental mean of the vacuum pressure change rate can be the average of the average change rates of the vacuum pressure of the vacuum pump in multiple experiments, that is, the average of the average change rates of the vacuum pressure per second calculated in multiple experiments. The calculation process of one experiment is the difference between the vacuum pressure in the current experimental state and the pressure when the vacuum pumping is stopped, divided by the vacuum pumping time to obtain the average change rate of the vacuum pressure in the experimental scenario.

[0046] Optionally, the vacuum pumping time when the vacuum pump leaks can be calculated based on the following formula: Among them, poff represents the closing threshold of the vacuum pump under the current atmospheric pressure; pon represents the opening threshold of the vacuum pump under the current atmospheric pressure. pv represents the experimental mean value of the vacuum pressure change rate; px represents the current average change rate of the vacuum pressure. poff and pon can be obtained by looking up a table, which is pre-calibrated.

[0047] In the embodiment of the present invention, the voltage signal of the vacuum sensor is continuously less than the voltage lower limit threshold, or continuously greater than the voltage upper limit threshold during the first time period as a fault diagnosis condition for the vacuum sensor fault. The fault diagnosis condition for the slight leakage fault is that the vacuum pump is not enabled, the brake pedal is not depressed, there is no vacuum sensor fault, the vacuum pump leaks and the vacuum pumping time is less than the normal vacuum pumping working time upper limit threshold, and the current vacuum pressure average change rate is less than the vacuum pressure change rate experimental mean value during the second time period.

[0048] In an optional embodiment of the present invention, determining the fault diagnosis conditions for a vacuum sensor fault, a slight leakage fault, a severe leakage fault, an extremely low vacuum fault, and a vacuum pump working timeout fault may include: taking the vacuum pump enabled, the brake pedal not pressed, there being no vacuum sensor fault, and the current vacuum pressure of the vacuum pump being lower than the vacuum pump starting threshold within the second time period as fault diagnosis conditions for a severe leakage fault; taking the absence of a vacuum sensor fault, the vacuum pump enabled, the brake pedal not pressed, and the vacuum pressure continuously lower than -20kpa within the second time period as fault diagnosis conditions for an extremely low vacuum fault; taking the continuous working of the vacuum pump exceeding the continuous working time threshold and still not stopping working as a fault diagnosis condition for a vacuum pump working timeout fault.

[0049] The continuous working time threshold may be a preset maximum time for the vacuum pump to continue working normally. The vacuum pump start threshold may be a start threshold for the vacuum pump under the current atmosphere.

[0050] In an embodiment of the present invention, the following conditions can be used as fault diagnosis conditions for a serious leakage fault: the vacuum pump is enabled, the brake pedal is not pressed, there is no vacuum sensor fault, and the current vacuum pressure of the vacuum pump is lower than the vacuum pump start threshold within the second time period. The following conditions can be used as fault diagnosis conditions for an extremely low vacuum fault: there is no vacuum sensor fault, the vacuum pump is enabled, the brake pedal is not pressed, and the vacuum pressure of the vacuum pump is continuously lower than -20kpa within the second time period. The following conditions can be used as fault diagnosis conditions for a vacuum pump overtime fault: the vacuum pump continues to work for more than the continuous working time threshold and still does not stop working.

[0051] In an optional embodiment of the present invention, according to the multi-dimensional status data and fault diagnosis conditions of the new energy vehicle, the current vehicle fault handling mode is matched from three types of fault handling modes, which may include: if according to the multi-dimensional status data and fault diagnosis conditions of the new energy vehicle, it is determined that the current vehicle has a vacuum sensor fault, and / or a mild leakage fault, then the first type of fault handling mode among the three types of fault handling modes is used as the current vehicle fault handling mode; if according to the multi-dimensional status data and fault diagnosis conditions of the new energy vehicle, it is determined that the current vehicle has a serious leakage fault, and / or an extremely low vacuum fault, then the second type of fault handling mode among the three types of fault handling modes is used as the current vehicle fault handling mode; if according to the multi-dimensional status data and fault diagnosis conditions of the new energy vehicle, it is determined that the current vehicle has a vacuum pump working timeout fault, then the third type of fault handling mode among the three types of fault handling modes is used as the current vehicle fault handling mode.

[0052] Among them, the first type of fault processing mode, the second type of fault processing mode and the third type of fault processing mode are three different fault processing modes.

[0053] In an embodiment of the present invention, when the multi-dimensional status data of the new energy vehicle is analyzed based on the fault diagnosis conditions, if it is determined that the current vehicle has a vacuum sensor fault, and / or a mild leakage fault, the current vehicle fault handling mode is determined to be the first type of fault handling mode; if it is determined that the current new energy vehicle has a serious leakage fault, and / or an extremely low vacuum fault, the current vehicle fault handling mode is determined to be the second type of fault handling mode; if it is determined that the current vehicle has a vacuum pump working timeout fault, the current vehicle fault handling mode is determined to be the third type of fault handling mode.

[0054] In an optional embodiment of the present invention, the first type of fault handling mode may include: lighting up the brake system fault light and the hazard warning light, and controlling the vacuum pump to enter the fault operation mode; limiting the speed of the current vehicle according to the target speed, and setting the coasting feedback to the target level.

[0055] The brake system fault light may be a warning light on the dashboard that warns of brake system faults. The hazard warning light may be used to warn the following vehicle. The target vehicle speed may be a pre-set speed limit. The target level may be a coasting feedback level that prevents the vehicle from losing the brakes and speeding too fast. The target level may be understood as the highest level of coasting feedback.

[0056] In an embodiment of the present invention, if it is determined that the current vehicle fault handling mode is the first type of fault handling mode, the brake system fault light and the hazard warning light are controlled to light up, and the vacuum pump is controlled to enter the fault operation mode, and the current vehicle is further limited in speed according to the target speed, and the gliding feedback is synchronously set to the target level.

[0057] In an optional embodiment of the present invention, the second type of fault handling mode may include: lighting up the brake system fault light and the hazard warning light, and controlling the vacuum pump to enter the fault operation mode; limiting the speed of the current vehicle according to the target speed, and setting the coasting feedback to the target level; if within the second time period, the accelerator pedal is not depressed, the vehicle speed is greater than the target speed, and the speed change rate is greater than 0, then based on the current vehicle status data and the target output torque table, determine the current torque upper limit value, and perform electric braking according to the current torque upper limit value.

[0058] The target output torque table may be a table that records different vehicle speed change rates and negative torques that can ensure smooth deceleration of the vehicle at different speeds, and may be calibrated by a technician. The current vehicle status data may be vehicle operation-related data that characterizes the current vehicle. The current vehicle status data may include, but is not limited to, battery motor and vehicle status.

[0059] In an embodiment of the present invention, if it is determined that the current vehicle fault handling mode is the second type of fault handling mode, the brake system fault light and the hazard warning light are controlled to light up, the vacuum pump enters the fault operation mode, and then the current vehicle is limited to the target speed, and the coasting feedback is set to the target level, and it is detected whether the accelerator pedal is not depressed, the vehicle speed is greater than the target speed, and the speed change rate is greater than 0 for a second consecutive period of time. If this happens, the target output torque table is queried based on the current vehicle status data to obtain the current torque upper limit value, and electric braking is further performed according to the current torque upper limit value.

[0060] In an optional embodiment of the present invention, the third type of fault handling mode may include: obtaining the vacuum pump stop enabling time; and according to the vacuum pump stop enabling time, stopping the vacuum pump and then restoring the normal working state.

[0061] The vacuum pump stop enabling time period may be a preset time period for stopping enabling the vacuum pump to work.

[0062] In an embodiment of the present invention, the technician can set the vacuum pump stop enabling time according to the vehicle type, and when it is determined that the current vehicle fault handling mode is the third type of fault handling mode, that is, the current vehicle has no other faults triggered except for the working timeout, the vacuum pump will be stopped according to the vacuum pump stop enabling time and then restored to normal working state.

[0063] In a specific example, the multi-dimensional status data of new energy vehicles is first collected, and based on the multi-dimensional status data of new energy vehicles, the vacuum pump fault diagnosis and fault confirmation of the current vehicle are performed to obtain the current vehicle fault processing mode, and the vacuum pump fault processing is automatically performed based on the current vehicle fault processing mode. The specific processing flow is as follows Figure 2 As shown, fault detection is performed based on the multi-dimensional status data of new energy vehicles and fault diagnosis conditions to determine whether the vacuum pump of the current vehicle is faulty. If a fault is determined, which fault handling mode to activate is determined. If the first type of fault handling mode is activated, the brake system fault light and the vehicle speed limit are 20km / h, the hazard warning light is automatically turned on, the vacuum pump is controlled to enter a fault operation mode of turning on for 20s and turning off for 5s, and the energy recovery high level is automatically entered, that is, the coasting feedback is set to the target level.

[0064] If the second type of fault handling mode is activated, the brake system fault light will be turned on and the vehicle speed will be limited to 20km / h, the hazard warning light will be automatically turned on, the vacuum pump will be controlled to enter the fault operation mode of turning on for 20s and off for 5s, and the energy recovery high-speed will be automatically entered, and then it will be judged whether the accelerator pedal is not pressed, the vehicle speed is greater than the target speed, and the speed change rate is greater than 0 within 10 consecutive seconds. If so, the motor braking mode will be started, that is, the negative torque auxiliary braking will be output according to the speed change rate and the speed table lookup. If the above situation does not occur, it will return to the operation of lighting the brake system fault light and limiting the vehicle speed to 20km / h. When the current vehicle speed after auxiliary braking is less than 15km / h, the auxiliary braking mode will be exited, otherwise it will return to the execution of judging whether the accelerator pedal is not pressed, the vehicle speed is greater than the target speed, and the speed change rate is greater than 0 within 10 consecutive seconds, and then the motor braking mode will be started, that is, the operation of outputting negative torque auxiliary braking according to the speed change rate and the speed table lookup.

[0065] If the third type of fault handling mode is activated, the enabling operation will be stopped for 5 seconds and then resumed to normal working state.

[0066] The existing method adjusts the working mode of the vacuum pump to ensure a certain vacuum degree when it fails. Although it can alleviate the brake assist to a certain extent, it is not suitable for all driving conditions and different types of vacuum pump failures. For example, when a serious leakage occurs when driving on a long downhill mountain road, even if the vacuum pump is in a continuous working state, it may not be able to meet the driving brake assist needs. If a single adjustment of the vacuum pump working mode is still adopted to obtain sufficient vacuum degree, without considering other safety auxiliary measures to ensure the stable operation of the vehicle, there will always be safety hazards. At the same time, instrument alarms and vehicle limp cannot effectively reduce driving risks in long downhill conditions. This solution adopts different fault handling modes for different vacuum assist faults, effectively improving the safety factor of the vehicle. After the vehicle controller detects a vacuum system fault, it will first alarm in the instrument and execute the vehicle speed limit. At the same time, it will automatically send a request to turn on the hazard warning lights to the body controller through the CAN bus, so that the vehicle automatically turns on the double flash to warn the rear vehicle of the fault in front of the vehicle and maintain a safe distance. At the same time, the vehicle controller automatically sets the coasting feedback mode to a high level to compensate for the possible lack of braking force. This can not only alleviate the impact of insufficient braking assistance, but also reduce the driver's distraction due to manual operation, and put more energy on vehicle driving control. The vehicle controller detects the current reported fault type and vehicle status to determine the current driving condition. If the driver has no intention to accelerate and the vehicle speed exceeds the fault limit for a period of time and the speed continues to rise at a certain speed change rate, the vehicle controller automatically adjusts to enter the motor feedback braking mode, and outputs negative torque for braking through the speed change rate table per second to prevent the vehicle from losing control and causing dangerous situations.

[0067] This solution can effectively prevent the driver from being unable to actively control the vehicle to decelerate after a vacuum boost failure occurs during a long downhill descent on a mountain road. In the event of a vehicle's driving brake boost failure, the vehicle controller analyzes and processes the current vehicle status data, and automatically controls the vehicle to enter the electric braking mode when the relevant conditions are met. The electric braking mode will assist the mechanical brake to control the vehicle to prevent the vehicle from being in a dangerous situation during a long downhill descent. This function can not only fully utilize the advantages of pure electric vehicle motor braking, but also effectively assist in reducing the real-time vehicle speed, ensuring that the driver will not continue to accelerate and lose control of the vehicle when the mechanical brake is insufficient. Secondly, the VCU actively controls the BCM to light up the double flash to warn the rear vehicle to maintain a safe distance and automatically adjust the coasting feedback to the highest level, which not only reduces the driver's series of manual operations in a panic and invests more energy in vehicle driving control, but also reduces the instantaneous change of vehicle speed when the brake is lost through coasting feedback. Different fault handling modes are set for different risk types of faults to ensure that the vehicle can still be controlled according to the driver's intention when low-risk faults occur as much as possible.

[0068] The technical solution of the embodiment of the present invention determines the fault diagnosis conditions of vacuum sensor fault, slight leakage fault, severe leakage fault, extremely low vacuum fault and vacuum pump working timeout fault by collecting multi-dimensional status data of new energy vehicles, and determines three types of fault handling modes, and then matches the current vehicle fault handling mode from the three types of fault handling modes according to the multi-dimensional status data of new energy vehicles and the fault diagnosis conditions, and automatically handles the vacuum pump fault according to the current vehicle fault handling mode. In this solution, the vacuum pump fault is divided into more fine-grained levels, and more abundant vacuum pump fault handling modes are determined, so that after clarifying the current vehicle fault handling mode, the vacuum pump fault is automatically handled in a targeted manner, which solves the problem of large safety hazards caused by the single vacuum pump fault handling mode of the current new energy vehicle, and can make fine-grained distinctions between vacuum pump faults, enrich the vacuum pump fault handling mode, and improve the driving safety factor of new energy vehicles.

[0069] Embodiment 3

[0070] Figure 3 This is a schematic diagram of the structure of a vacuum booster fault handling device provided in the third embodiment of the present invention. Figure 3 As shown, the device comprises:

[0071] The vehicle status collection module 310 is used to collect multi-dimensional status data of new energy vehicles;

[0072] A fault diagnosis configuration module 320 is used to determine fault diagnosis conditions of a vacuum sensor fault, a slight leakage fault, a severe leakage fault, an extremely low vacuum fault, and a vacuum pump working timeout fault, and to determine three types of fault processing modes;

[0073] The fault processing module 330 is used to match the current vehicle fault processing mode from three types of fault processing modes according to the multi-dimensional state data of the new energy vehicle and the fault diagnosis conditions, and automatically perform vacuum pump fault processing according to the current vehicle fault processing mode.

[0074] The technical solution of the embodiment of the present invention determines the fault diagnosis conditions of vacuum sensor fault, slight leakage fault, severe leakage fault, extremely low vacuum fault and vacuum pump working timeout fault by collecting multi-dimensional status data of new energy vehicles, and determines three types of fault handling modes, and then matches the current vehicle fault handling mode from the three types of fault handling modes according to the multi-dimensional status data of new energy vehicles and the fault diagnosis conditions, and automatically handles the vacuum pump fault according to the current vehicle fault handling mode. In this solution, the vacuum pump fault is divided into more fine-grained levels, and more abundant vacuum pump fault handling modes are determined, so that after clarifying the current vehicle fault handling mode, the vacuum pump fault is automatically handled in a targeted manner, which solves the problem of large safety hazards caused by the single vacuum pump fault handling mode of the current new energy vehicle, and can make fine-grained distinctions between vacuum pump faults, enrich the vacuum pump fault handling mode, and improve the driving safety factor of new energy vehicles.

[0075] Optionally, the fault diagnosis configuration module 320 can be used to use the fact that the voltage signal of the vacuum sensor is always less than the voltage lower limit threshold, or greater than the voltage upper limit threshold, during the first time period as a fault diagnosis condition for the vacuum sensor fault; and to use the fact that the vacuum pump is not enabled, the brake pedal is not pressed, there is no vacuum sensor fault, the vacuum pump leaks and the vacuum pump time is less than the normal vacuum pump working time upper limit threshold, and the current average vacuum pressure change rate is less than the experimental mean of the vacuum pressure change rate as fault diagnosis conditions for the mild leakage fault.

[0076] Optionally, the fault diagnosis configuration module 320 can be used to use the fact that the vacuum pump is enabled, the brake pedal is not pressed, there is no vacuum sensor fault, and the current vacuum pressure of the vacuum pump is lower than the vacuum pump starting threshold within the second time period as the fault diagnosis condition for the serious leakage fault; use the fact that there is no vacuum sensor fault, the vacuum pump is enabled, the brake pedal is not pressed, and the vacuum pressure is continuously lower than -20kpa within the second time period as the fault diagnosis condition for the extremely low vacuum fault; use the fact that the vacuum pump has been working continuously for more than the continuous working time threshold and has not stopped working as the fault diagnosis condition for the vacuum pump working timeout fault.

[0077] Optionally, the fault diagnosis configuration module 320 is specifically used to, if it is determined that the current vehicle has the vacuum sensor fault and / or the mild leakage fault according to the multi-dimensional status data of the new energy vehicle and the fault diagnosis conditions, then the first type of fault handling mode among the three types of fault handling modes is used as the fault handling mode of the current vehicle; if it is determined that the current vehicle has the severe leakage fault and / or the extremely low vacuum fault according to the multi-dimensional status data of the new energy vehicle and the fault diagnosis conditions, then the second type of fault handling mode among the three types of fault handling modes is used as the fault handling mode of the current vehicle; if it is determined that the current vehicle has the vacuum pump working timeout fault according to the multi-dimensional status data of the new energy vehicle and the fault diagnosis conditions, then the third type of fault handling mode among the three types of fault handling modes is used as the fault handling mode of the current vehicle.

[0078] Optionally, the first type of fault handling mode includes: lighting up the brake system fault light and hazard warning light, and controlling the vacuum pump to enter a fault operation mode; limiting the speed of the current vehicle according to a target speed, and setting the coasting feedback to a target level.

[0079] Optionally, the second type of fault handling mode includes: lighting up the brake system fault light and hazard warning light, and controlling the vacuum pump to enter the fault operation mode; limiting the speed of the current vehicle according to the target speed, and setting the coasting feedback to the target level; if within the second time period, the accelerator pedal is not pressed, the vehicle speed is greater than the target speed, and the speed change rate is greater than 0, then based on the current vehicle status data and the target output torque table, determine the current torque upper limit value, and perform electric braking according to the current torque upper limit value.

[0080] Optionally, a third type of fault handling mode includes: obtaining the vacuum pump stop enabling time; and stopping the vacuum pump according to the vacuum pump stop enabling time and then restoring the vacuum pump to a normal working state.

[0081] The vacuum boost fault processing device provided in the embodiment of the present invention can execute the vacuum boost fault processing method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0082] Embodiment 4

[0083] Figure 4A schematic diagram of an electronic device that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0084] like Figure 4 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0085] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0086] The processor 11 may be a variety of general and / or dedicated processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a vacuum boost fault processing method.

[0087] In some embodiments, the vacuum boost fault handling method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the vacuum boost fault handling method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the vacuum boost fault handling method in any other appropriate manner (e.g., by means of firmware).

[0088] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0089] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0090] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0091] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0092] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0093] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of traditional physical hosts and VPS servers, which are difficult to manage and have weak business scalability.

[0094] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0095] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum booster fault handling method, characterized in that: include: Collect multi-dimensional status data of new energy vehicles; Determine the fault diagnosis conditions for vacuum sensor failure, slight leakage failure, severe leakage failure, extremely low vacuum failure, and vacuum pump overtime failure, and determine three types of fault handling modes; According to the multi-dimensional status data of the new energy vehicle and the fault diagnosis conditions, a current vehicle fault processing mode is matched from the three types of fault processing modes, and vacuum pump fault processing is automatically performed according to the current vehicle fault processing mode.

2. The method according to claim 1, characterized in that Determine the fault diagnosis conditions for vacuum sensor failure, slight leakage failure, severe leakage failure, extremely low vacuum failure, and vacuum pump overtime failure, including: The voltage signal of the vacuum sensor is always less than the voltage lower limit threshold value, or greater than the voltage upper limit threshold value during the first time period, as a fault diagnosis condition of the vacuum sensor fault; During the second time period, the vacuum pump is not enabled, the brake pedal is not pressed, there is no vacuum sensor failure, the vacuum pump leakage time is less than the upper limit threshold of the normal vacuum working time, and the current average change rate of the vacuum pressure is less than the experimental average value of the vacuum pressure change rate, as the fault diagnosis conditions for the mild leakage fault.

3. The method according to claim 2, characterized in that Determine the fault diagnosis conditions for vacuum sensor failure, slight leakage failure, severe leakage failure, extremely low vacuum failure, and vacuum pump overtime failure, including: The fault diagnosis condition of the severe leakage fault is that the vacuum pump is enabled, the brake pedal is not depressed, there is no vacuum sensor fault, and the current vacuum pressure of the vacuum pump is lower than the vacuum pump start threshold within the second time period; The fault diagnosis condition of the extremely low vacuum degree fault is that there is no vacuum sensor fault, the vacuum pump is enabled, the brake pedal is not depressed, and the vacuum pressure is continuously lower than -20 kPa within the second time period; The fact that the vacuum pump continues to work for more than a continuous working time threshold and still does not stop working is used as a fault diagnosis condition for the vacuum pump working timeout fault.

4. The method according to claim 1, characterized in that: According to the multi-dimensional state data of the new energy vehicle and the fault diagnosis condition, a current vehicle fault processing mode is matched from the three types of fault processing modes, including: If it is determined that the current vehicle has the vacuum sensor fault and / or the mild leakage fault according to the multi-dimensional state data of the new energy vehicle and the fault diagnosis condition, the first type of fault processing mode among the three types of fault processing modes is used as the current vehicle fault processing mode; If it is determined that the current vehicle has the severe leakage fault and / or the extremely low vacuum fault according to the multi-dimensional state data of the new energy vehicle and the fault diagnosis condition, the second type of fault processing mode among the three types of fault processing modes is used as the current vehicle fault processing mode; If it is determined based on the multi-dimensional status data of the new energy vehicle and the fault diagnosis conditions that the current vehicle has the vacuum pump working timeout fault, the third type of fault handling mode among the three types of fault handling modes is used as the current vehicle fault handling mode.

5. The method according to claim 4, characterized in that The first type of fault handling mode includes: Light up the brake system fault light and hazard warning light, and control the vacuum pump to enter fault operation mode; The current vehicle is limited to the target speed and the coasting feedback is set to the target level.

6. The method according to claim 4, characterized in that The second type of fault handling mode includes: Light up the brake system fault light and hazard warning light, and control the vacuum pump to enter fault operation mode; Limit the speed of the current vehicle to the target speed and set the coasting feedback to the target level; If within the second time period, the accelerator pedal is not depressed, the vehicle speed is greater than the target speed, and the vehicle speed change rate is greater than 0, the current torque upper limit value is determined based on the current vehicle state data and the target output torque table, and electric braking is performed according to the current torque upper limit value.

7. The method according to claim 4, characterized in that The third type of fault handling mode includes: Get the vacuum pump stop enabling time; According to the vacuum pump stop enabling time, the vacuum pump is stopped and then restored to normal working state.

8. A vacuum booster fault handling device, characterized in that: include: Vehicle status collection module, used to collect multi-dimensional status data of new energy vehicles; Fault diagnosis configuration module, used to determine the fault diagnosis conditions of vacuum sensor fault, slight leakage fault, severe leakage fault, extremely low vacuum fault and vacuum pump working timeout fault, and determine three types of fault handling modes; The fault processing module is used to match the current vehicle fault processing mode from three types of fault processing modes according to the multi-dimensional state data of the new energy vehicle and the fault diagnosis conditions, and automatically perform vacuum pump fault processing according to the current vehicle fault processing mode.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the vacuum boosting fault processing method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the vacuum boost fault handling method according to any one of claims 1 to 7 when executed.

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