CN116061907A - Failure management method of electric control parking system - Google Patents
Failure management method of electric control parking system Download PDFInfo
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- CN116061907A CN116061907A CN202111272921.XA CN202111272921A CN116061907A CN 116061907 A CN116061907 A CN 116061907A CN 202111272921 A CN202111272921 A CN 202111272921A CN 116061907 A CN116061907 A CN 116061907A
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- 238000007726 management method Methods 0.000 title claims abstract description 33
- 238000012805 post-processing Methods 0.000 claims abstract description 37
- 238000011058 failure modes and effects analysis Methods 0.000 claims abstract description 17
- 230000004044 response Effects 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 17
- 230000007257 malfunction Effects 0.000 claims 1
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention discloses a failure management method of an electric control parking system, which comprises the following steps: classifying failure faults of the electric control parking system into electric faults, sensor faults, failure faults and unexpected faults; performing failure mode and effect analysis on each failure fault, and determining post-processing measures corresponding to each failure fault according to the failure mode and effect analysis; wherein, the post-treatment measures of the electrical faults comprise no parking control; the post-treatment measures of the sensor faults comprise no parking control or open loop parking control; the post-treatment measures of the failure fault comprise parking control; post-treatment measures for unexpected faults include performing parking control; wherein the parking control is to enter the parking brake control or release the parking brake control. The failure management method of the electronic control parking system improves the usability in a failure mode on the basis of guaranteeing the safety of the vehicle, and optimizes the comprehensive performance of the vehicle on usability and safety.
Description
Technical Field
The invention relates to the technical field of vehicle electric control parking control methods, in particular to a failure management method of an electric control parking system.
Background
The electric control parking system replaces the traditional mechanical pulling lock type parking mechanism design, and fault diagnosis and post-treatment of the electric control parking system are very important to guaranteeing the safety of passengers. If the diagnosis and the post-treatment cannot be effectively carried out, the control of the vehicle power assembly is possibly inconsistent with the actual intention of a driver, and dangerous situations can occur when the vehicle power assembly is serious, so that the safety of passengers is influenced; and it is necessary to disable the vehicle part functions after a fault is found to ensure safety, but in some conditions it may happen that the usability of the vehicle is affected by disabling too many functions.
The existing management method for failure of the electric control parking system has the following problems that failure grade classification and post-processing definition are not detailed enough, single post-processing is adopted for failures of different degrees, and in order to ensure the safety in all failure modes, the most strict post-processing method is generally used, so that the usability of vehicles when the failures are lighter is influenced.
Disclosure of Invention
The invention aims to solve the problem that the vehicle usability is possibly influenced by a management method for failure of an electric control parking system in the prior art. The failure management method of the electronic control parking system improves the usability in a failure mode on the basis of guaranteeing the safety of the vehicle, and optimizes the comprehensive performance of the vehicle on the usability and the safety.
In order to solve the above problems, the present invention provides a failure management method of an electronic control parking system, including: classifying failure faults of the electric control parking system into electric faults, sensor faults, failure faults and unexpected faults; and carrying out failure mode and effect analysis on each failure fault, and determining post-processing measures corresponding to each failure fault according to the failure mode and effect analysis.
Wherein, the post-treatment measures of the electrical faults comprise no parking control; the post-treatment measures of the sensor faults comprise no parking control or open loop parking control; the post-treatment measures of the failure fault comprise parking control; post-treatment measures for unexpected faults include performing parking control; wherein the parking control is to enter the parking brake control or release the parking brake control.
By adopting the scheme, the failure modes of the electronic control parking system are classified, different post-treatment measures are adopted for different types of failure modes, the usability of the vehicle in the failure mode is improved on the basis of ensuring the safety of the vehicle, and the comprehensive performance of the vehicle on usability and safety is optimized.
According to another specific embodiment of the invention, the failure management method of the electric control parking system disclosed by the embodiment of the invention comprises the steps of entering a parking brake electric failure and releasing the parking brake electric failure; the failure fault comprises a parking brake entering failure fault and a parking brake releasing failure fault; undesired faults include undesired entry into the parking brake fault, undesired release of the parking brake fault.
According to another embodiment of the present invention, the method for managing failure of an electronic control parking system disclosed in the embodiment of the present invention further includes: and carrying out failure mode and effect analysis on each failure fault, and classifying the states of the gear shifting handle of the vehicle when the failure fault occurs according to the failure mode and effect analysis, wherein the states of the gear shifting handle comprise the following four types.
First state: the gear shifting handle is switched to the parking gear, and the corresponding failure faults comprise a parking brake entering electric fault, a parking brake releasing electric fault, a sensor fault and a parking brake entering failure fault; wherein, when an electrical failure of entering the parking brake, an electrical failure of releasing the parking brake or a sensor failure occurs, the post-processing measures include not performing the control of entering the parking brake any more; when an entry parking brake failure occurs, the post-processing means includes performing an entry parking brake control.
Second state: the shift lever is maintained in park, the corresponding failure fault includes an unexpected release of the park brake fault, and the post-processing includes entering park brake control.
Third state: the gear shifting handle is switched to a non-parking gear, and the corresponding failure faults comprise a parking brake release electric fault, a sensor fault and a parking brake release failure fault; wherein, when an electrical failure occurs to release the parking brake, the post-processing measures include not performing the release parking brake control any more; when a sensor fault occurs, the post-processing measures comprise open loop parking brake release control; when a failed release of the parking brake failure occurs, the post-processing means includes performing a release parking brake control.
Fourth state: the shift lever is maintained in a non-park position, the corresponding failure fault includes an unexpected entry into a park brake fault, and the post-processing includes a release park brake control.
According to another embodiment of the present invention, the method for managing failure of an electronic control parking system according to the embodiment of the present invention, when a failure of entering a parking brake occurs, performs a parking brake entering control step including: acquiring parking control information and parking control state information, and judging success or failure of entering the parking brake, wherein if the parking control state information indicates that the parking brake is already entered, the success of entering the parking brake control is judged; if the parking control state information indicates that the parking brake is not entered, and the response times of entering the parking brake reach the threshold value of the response, judging that the control of entering the parking brake fails; if the parking control state information indicates that the parking brake is not entered, and the response times of entering the parking brake do not reach the threshold value of the response, continuing to enter the parking brake control.
When a failure to release the parking brake occurs, the step of performing the control of releasing the parking brake includes: acquiring parking control information and parking control state information, and judging whether the release of the parking brake is successful or not, wherein if the parking control state information indicates that the parking brake is released, the release of the parking brake is judged to be successful; if the parking control state information indicates that the parking brake is not released and the response times of releasing the parking brake reach the release response threshold, judging that the control of releasing the parking brake fails; if the parking control state information indicates that the parking brake is not released and the response times of releasing the parking brake do not reach the release response threshold value, continuing to release the parking brake.
According to another specific embodiment of the invention, the failure management method of the electronic control parking system disclosed by the embodiment of the invention has the advantages that the entering response threshold and the releasing response threshold are both 3 times.
According to another embodiment of the present invention, the method for managing failure of an electronic control parking system disclosed in the embodiment of the present invention, when a failure occurs in which releasing a parking brake is not expected, performs the step of entering a parking brake control, including: acquiring parking control state information, and judging success or failure of entering a parking brake, wherein if the parking control state information indicates that the parking brake is already entered, the success of entering the parking brake control is judged; if the parking control state information indicates that the parking brake is not entered, judging that the control of entering the parking brake fails, and performing post-processing measures as a failure of entering the parking brake.
When unexpected parking brake fault occurs, the step of releasing the parking brake comprises the following steps: acquiring parking control state information, and judging whether the parking brake is successfully released, wherein if the parking control state information indicates that the parking brake is released, the parking brake release control is judged to be successful; if the parking control state information indicates that the parking brake is not released, the parking brake release control is continued.
According to another embodiment of the present invention, the failure management method of the electronic control parking system disclosed in the embodiment of the present invention makes the shift lever at the parking gear and requests the electronic parking brake system to control the parking brake when judging that the control of entering the parking brake fails.
According to another embodiment of the present invention, the method for managing failure of an electronic control parking system disclosed in the embodiment of the present invention further includes: according to the failure fault and the post-processing measures, the vehicle sends out prompt information to remind a driver; the prompting information comprises a gear or gear flicker prompt displayed at the gear display position of the instrument board.
According to another specific embodiment of the invention, the method for managing the failure of the electric control parking system disclosed by the embodiment of the invention further comprises the step of displaying characters on an instrument panel to prompt the occurrence of failure faults.
According to another specific embodiment of the invention, the failure management method of the electric control parking system disclosed by the embodiment of the invention further comprises the step of sending out warning sound.
The beneficial effects of the invention are as follows:
according to the failure management method of the electronic control parking system, failure modes of the electronic control parking system are classified according to the composition and failure results of the electronic control parking system, different post-treatment measures are adopted for different types of failure modes, the usability of the vehicle in the failure modes is improved on the basis of ensuring the safety of the vehicle, and the comprehensive performance of the vehicle in usability and safety is optimized. Further, in some embodiments, according to the configuration of the high and low configuration of the instrument panel, the driver is effectively reminded through the information such as characters, warning sounds, gear display and the like on the instrument panel, and driving safety is improved.
Drawings
FIG. 1 is a schematic diagram of an electronically controlled parking system;
FIG. 2 is a flowchart showing a step of performing parking brake control when a failure occurs in the failure management method of the electronic control parking system according to the present invention;
fig. 3 is a flowchart of a step of performing a parking brake release control when a failure occurs in releasing a parking brake in a failure management method of an electronic control parking system provided by the present invention.
Reference numerals illustrate:
1: a controller; 2: parking electromagnet; 21: a gear locking pin; 3: a parking unlocking electromagnetic valve; 4: a parking driving cylinder; 41: driving a piston; 42: an elastic member; 5: a joystick; 6: a parking position sensor; 7: a parking pawl; 8: a parking gear; 9: other controllers; 10: an instrument.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples. While the description of the invention will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the invention described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the invention. The following description contains many specific details for the purpose of providing a thorough understanding of the present invention. The invention may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples. While the description of the invention will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the invention described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the invention. The following description contains many specific details for the purpose of providing a thorough understanding of the present invention. The invention may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.
The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The invention provides a failure management method of an electric control parking system, which is carried out by a controller in an automobile.
In order to make the method of the invention clearer, the structure of the electric control parking system controlled by the controller and the parking control process are described. As shown in fig. 1, the electric control parking system comprises a controller 1, a parking electromagnet 2 and a parking unlocking solenoid valve 3 which are connected with the controller 1, a parking driving cylinder 4 connected with the parking electromagnet 2 and the parking unlocking solenoid valve 3, a control rod 5 and a parking position sensor 6 which are connected with the parking driving cylinder 4, a parking pawl 7 connected with the control rod 5, and a parking gear 8.
When the controller 1 performs control of entering the parking brake (entering P), the parking electromagnet 2 is switched on, the gear locking pin 21 is lifted by the magnetic force generated by the parking electromagnet 2, the position locking of the driving piston 41 in the parking driving cylinder 4 is released, the driving piston 41 moves towards the direction of entering the parking brake (entering P) under the action of the spring force of the elastic piece 42 in the parking driving cylinder 4, and the parking pawl 7 is pushed into the tooth groove of the parking gear 8 through the operating rod 5, so that the parking brake is entered.
When the controller 1 performs control of releasing the parking brake (P), the controller 1 controls the parking-unlock solenoid valve 3 to open and supplies pressure oil to the parking drive cylinder 4. When the oil pressure reaches a set value, the driving piston 41 in the parking driving cylinder 4 is acted by the oil pressure, moves towards the direction of releasing the parking brake (out P) against the elastic force of the elastic piece 42, drags the parking pawl 7 to exit the tooth slot of the parking gear 8 through the operating rod 5, and moves the driving piston 41 to the locking position of the gear locking pin 21, and the gear locking pin 21 locks the position of the driving piston 41, so that the parking brake is released.
The parking position sensor 6 is provided to the parking drive cylinder 4 for detecting the position of the drive piston 41 and feeding back a position signal to the controller 1.
The controller 1 may in particular be a gearbox controller (TCU), a Shifter Controller (SCU) or a chassis controller. The brake control mode is set according to the brake control mode and the like, wherein electrohydraulic control is adopted for parking, and the controller 1 can be a TCU or a chassis controller; the parking is controlled by a motor, and the controller 1 can be a TCU, an SCU or a controller of a chassis.
Meanwhile, as shown in fig. 1, the controller 1 is also connected with other related controllers 9 through an automobile communication network, such as a CAN bus, so as to transmit signals. For example, in a specific embodiment using electrohydraulic control for parking, the controller 1 is in particular a TCU, the other controllers 9 comprise SCUs, which are connected to the SCU via a CAN bus, and via which signals of the handle CAN be transmitted to the TCU for transmitting commands from the driver. The controller 1 may also be connected to the automobile instrument 10 (IPK) through a CAN bus or the like to display management process related information such as a fault type, a post-processing condition, gear information, a prompt message, and the like on the automobile instrument 10.
The failure management method of the electronic control parking system provided by the invention comprises the following steps: firstly, classifying failure faults of an electric control parking system according to the composition and failure results of the electric control parking system, wherein the failure faults are classified into electric faults, sensor faults, failure faults and unexpected faults; the failures caused by these faults include a control entry parking brake (in P) failure or a control release parking brake (out P) failure.
Wherein the electrical fault refers to the failure of the electric control parking system caused by the electrical fault of the electric control parking system; specifically, the electrical fault may be determined according to characteristics of the control executing component (electromagnetic valve/electromagnet), signals received by the interface circuit of the control executing component and the controller 1, and the like, if the signals received by the controller 1 are not within a normal range defined in the specification, it is indicated that a short circuit or an open circuit or a fault of the driving chip occurs, and the like.
The sensor failure refers to failure of the electronic control parking system caused by failure of the parking position sensor; specifically, the occurrence of the sensor failure may be determined based on the characteristics of the parking position sensor, the signals received by the interface circuit of the parking position sensor and the controller 1, and the like, if the sensor signals received by the controller 1 are not within the normal range defined by the sensor specification.
The failure is a failure that a control of entering the parking brake fails or a control of releasing the parking brake fails when it is determined that an electrical failure and a sensor failure have not occurred.
The unexpected fault refers to the failure of the electric control parking system caused by unexpected abnormal operation of the electric control parking system when the electric fault and the sensor fault are not determined to occur. For example, if the vehicle handle position and the driving piston position in the electric control parking system show that the vehicle is in a parking brake releasing state, parking control is not performed, but if the vehicle enters a parking brake action, the parking sensor position changes from the parking brake releasing state to the parking brake entering state, then an unexpected fault, particularly, an unexpected parking brake entering fault, is judged to occur; and conversely, the parking brake is not expected to be released.
Performing failure mode and effect analysis (FMEA, failure Mode and Effects Analysis) on each failure fault by software, such as PLATO software, and determining post-processing measures corresponding to each failure fault according to the failure mode and effect analysis; wherein the electrical fault post-treatment measures include no more parking control; the post-treatment measures of the sensor faults comprise no parking control or open loop parking control; the post-treatment measures of the failure fault comprise parking control; post-treatment measures for undesired faults include performing parking control. The parking control is parking brake entering (P entering) control or parking brake releasing (P exiting) control, and the specific control is determined according to the state of the vehicle. Further, when an electrical failure occurs, if parking control is continued, a problem may occur in that the vehicle cannot be used, and thus parking control is not performed any more to ensure usability of the vehicle.
By adopting the scheme, the failure modes of the electronic control parking system are classified according to the composition and failure results of the electronic control parking system, different post-treatment measures are adopted for the failure modes of different types, the usability of the vehicle in the failure mode is improved on the basis of ensuring the safety of the vehicle, and the comprehensive performance of the vehicle in usability and safety is optimized.
According to another embodiment of the invention, the electrical faults include an enter parking brake (in P) electrical fault, a release parking brake (out P) electrical fault; failure faults include an enter parking brake (enter P) failure fault, a release parking brake (exit P) failure fault; undesired faults include undesired entry parking brake (P in) faults, undesired release parking brake (P out) faults. Wherein an in-parking brake (in P) electrical fault refers to an electrical fault that renders it impossible to control the in-parking brake, and a release parking brake (out P) electrical fault refers to an electrical fault that renders it impossible to control the release parking brake.
Specifically, according to the present embodiment, failure fault classifications of the electronic control parking system are shown in table 1.
TABLE 1
According to another embodiment of the present invention, the failure management method further includes: failure Mode and Effect Analysis (FMEA) is performed for each failure fault, and the state of the shift lever of the vehicle at the time of the failure fault is classified according to the failure mode and effect analysis, wherein the state of the shift lever includes the following four states.
First state: the gear shifting handle is switched to a parking gear (P gear), and the corresponding failure faults comprise P-in electrical faults, P-out electrical faults, sensor faults and P-in failure faults. When P-in electrical fault, P-out electrical fault or sensor fault occurs, the post-processing measures comprise that P-in control is not performed any more; when a P-in failure fault occurs, the post-processing measures include P-in control. When P electrical failure or sensor failure occurs, the vehicle is not controlled to enter P due to the fact that the vehicle can normally run.
Second state: the shift lever is maintained in park, the corresponding failure fault includes an unexpected P fault, and the post-processing action includes performing an in-P control.
Third state: the gear shifting handle is switched to a non-parking gear, and the corresponding failure faults comprise P electrical faults, sensor faults and P failure faults. When P electrical faults occur, the post-treatment measures comprise that P control is not performed any more; when a sensor fault occurs, the post-processing measures comprise open loop P control; when a P failure fault occurs, the post-processing measures include P-out control. When a sensor fault occurs, the open loop performs P-out control in consideration of normal running of the vehicle.
Fourth state: the shift lever is maintained in the non-park gear, the corresponding failure fault includes an unexpected P-in fault, and the post-processing measure includes performing P-out control in view of the normal running of the vehicle.
According to another embodiment of the present invention, the failure management method further includes: when the P-in failure fault occurs, the P-in control step comprises the following steps: and acquiring parking control information and parking control state information, and judging success or failure of P entering.
Specifically, in the first state, as shown in fig. 2, the shift handle is switched to a P gear, whether P is entered is judged according to parking control state information acquired and returned by the parking sensor, and if the parking control state information indicates that P is entered, P entering control is judged to be successful; if the parking control state information indicates that P is not entered, indicating that P entering failure occurs, judging the type of the failure, after determining that the failure is the P entering failure, performing P exiting control for attempting P entering control, then performing P entering control, judging whether P is entered according to the parking control information acquired by the parking sensor, if the parking control state information indicates that P is entered, judging that the P entering control is successful, releasing the state of post-failure processing, and entering a normal state; if the parking control state information indicates that P is not entered, further judging whether the P entering response times reach an entry response threshold according to the acquired parking control information, and judging that P entering control fails when the P entering response times reach the entry response threshold; if the parking control state information indicates that P is not entered and the P-in response times do not reach the P-in response threshold, P-out control is performed first, then P-in control is continued, and meanwhile the P-in response times are increased by 1.
When the P failure fault occurs, the P control step comprises the following steps: and acquiring parking control information and parking control state information, and judging whether P is successful or failed.
Specifically, in the third state, as shown in fig. 3, the shift handle is switched to a non-P gear, whether P is out or not is judged according to the parking control state information acquired and returned by the parking sensor, and if the parking control state information indicates that P is out, the P control is judged to be successful; if the parking control state information indicates that the P is not generated, the P failure is indicated, the fault type is judged, after the P failure fault is determined to occur, the P control is firstly carried out for attempting the P control, the P control is carried out, the parking control information is collected through the parking sensor to judge whether the P is generated, if the parking control state information indicates that the P is generated, the P control is judged to be successful, the state of post-fault processing is released, and the normal state is entered; if the parking control state information indicates that the P is not generated, further judging whether the P response times reach a release response threshold according to the acquired parking control information, and judging that the P control is failed when the P response times reach the release response threshold; if the parking control state information indicates that the P is not output and the P output response times do not reach the release response threshold, the P input control is performed first, then the P output control is continued, and meanwhile the P output response times are increased by 1.
The step of collecting parking control information is to count the times of occurrence of a parking braking program, and the P-in control response times are increased by 1 time when the P-in control program is completed once.
Collecting parking control state information refers to collecting information that a vehicle is in a P state or out of the P state in practice; if the gear shifting handle is switched to a non-parking gear, such as a forward gear (D gear) or a reverse gear (R gear), the vehicle can normally run, so that the state of P is indicated, and the vehicle cannot normally run, so that the state of P is indicated; when the shift lever is shifted to the parking position (P position), the vehicle cannot travel, indicating a P-entered state, and the vehicle can also travel, indicating a P-not-entered state.
The entry response threshold and the release response threshold are determined according to the control time and specific requirements, and can be determined as 3 times, 4 times, 5 times and the like.
According to another embodiment of the invention, the entry response threshold and the release response threshold are both 3 times.
According to another embodiment of the present invention, when an unexpected P failure occurs, the performing the P-in control step includes: and acquiring parking control state information, and judging success or failure of P entering, wherein if the parking control state information indicates that P entering is performed, the success of P entering control is judged, the state of fault post-processing is released, and the normal state is entered. If the parking control state information indicates that P is not entered, judging that P entering control fails, and performing corresponding post-processing measures as P entering failure faults. When an unexpected P-in fault occurs, the P-out control step comprises the following steps: collecting parking control state information, and judging whether P is successful, wherein if the parking control state information indicates that P is already out, the P is judged to be successful; if the parking control state information indicates that the P is not output, continuing to perform P output control until the P is output successfully or until a certain time.
According to another embodiment of the present invention, when the P-in control step is performed for safety, the shift lever is put in the park position and an electronic parking brake system (EPB) is requested to control the parking brake when it is judged that the P-in control is failed.
When the P control step is performed, if it is determined that the P control is successful, and it is further required to determine that the shift lever is switched to the park (P gear) or neutral (N gear) or other vehicles are in other safe states, the state of the post-fault process is allowed to be released, and the vehicle is in a normal state, so as to ensure the safety of the vehicle. Other security states may be specifically: driver steps on brake pedal, EPB pulls up, automatic park (AutoHold) activates, etc.
According to the above, the failure management method provided by the invention, the failure fault classification of the electric control parking system, and the corresponding post-processing measures and safety measures are shown in table 2.
TABLE 2
According to another embodiment of the present invention, the failure management method further includes: according to the failure fault and the post-processing measures, the vehicle sends out prompt information to remind a driver; the prompting information comprises a gear or gear flicker prompt displayed at the gear display position of the instrument board.
Specifically, the vehicle dashboard may have different configurations of high and low, wherein the low profile dashboard supports a basic gear display, including P, R, N, D, S and a specific gear in manual mode, among others. The high-speed instrument board supports the gear display of the foundation, can support the text prompt, the sound prompt and the flashing prompt at the gear display. However, for both configurations, a gear or gear flashing cue may be displayed at the dashboard gear display location to alert the driver.
The existing failure management method has the advantages that after failure and post-processing, the interaction information with a driver is less and simple, and the possibility that the driver cannot be reminded of the failure management method is present. By adopting the scheme, the driver is effectively reminded through information such as gear display and the like on the instrument panel.
According to another embodiment of the invention, the prompt message further comprises a character displayed on the high-power instrument panel to prompt that the failure fault occurs. According to another embodiment of the invention, the prompt message further comprises an alarm sound emitted by the high-altitude instrument panel.
Specifically, the post-processing measures of the electronic control parking system and the prompt information sent by the vehicle according to the failure management method provided by the invention are shown in table 3.
TABLE 3 Table 3
In Table 3, the threshold value is the maximum speed at which the vehicle can be braked, and may range from 2 to 8km/h, for example, 5km/h, depending on the specific value of the vehicle.
By adopting the scheme, the driver is effectively reminded through the information such as characters, warning sounds, gear display and the like on the instrument panel according to the high-low configuration of the instrument panel.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention with reference to specific embodiments, and it is not intended to limit the practice of the invention to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present invention.
Claims (10)
1. The failure management method of the electric control parking system is characterized by comprising the following steps of:
the failure faults of the electric control parking system are classified into electric faults, sensor faults, failure faults and unexpected faults;
performing failure mode and effect analysis on each failure fault, and determining post-processing measures corresponding to each failure fault according to the failure mode and effect analysis; wherein,,
the post-treatment measures of the electrical fault include no more parking control;
the post-processing measure of the sensor failure includes not performing the parking control or performing the parking control open loop;
the post-processing measure of the failure fault includes performing the parking control;
the post-treatment measures of the undesired malfunction include performing the parking control; wherein,,
the parking control is to enter the parking brake control or release the parking brake control.
2. The method of claim 1, wherein the electrical fault comprises an access parking brake electrical fault, a release parking brake electrical fault;
the failure fault comprises a parking brake entering failure fault and a parking brake releasing failure fault;
the undesired faults include undesired entry into the parking brake fault, undesired release of the parking brake fault.
3. The failure management method of an electronic control parking system according to claim 2, wherein the failure management method further comprises: performing failure mode and effect analysis on each failure fault, and classifying the state of a gear shifting handle of the vehicle when the failure fault occurs according to the failure mode and effect analysis, wherein the state of the gear shifting handle comprises the following components:
first state: the gear shifting handle is switched to a parking gear, and the corresponding failure faults comprise an electrical fault of entering a parking brake, an electrical fault of releasing the parking brake, a sensor fault and a failure fault of entering the parking brake; wherein,,
when the parking brake entering electrical fault, the parking brake releasing electrical fault or the sensor fault occurs, the post-processing measures comprise not performing parking brake entering control any more;
when the failure of entering the parking brake occurs, the post-processing measures comprise the step of executing the control of entering the parking brake;
second state: the gear shifting handle is maintained at a parking gear, the corresponding failure fault comprises the unexpected release parking brake fault, and the post-treatment measure comprises the entering parking brake control;
third state: the gear shifting handle is switched to a non-parking gear, and the corresponding failure faults comprise an electrical fault of releasing the parking brake, a sensor fault and a failure fault of releasing the parking brake; wherein,,
when the electrical failure of releasing the parking brake occurs, the post-treatment measures comprise not performing the releasing parking brake control any more;
when the sensor fails, the post-processing measures include open loop for the release of the parking brake control;
when the failure fault of releasing the parking brake occurs, the post-processing measures comprise performing the control of releasing the parking brake;
fourth state: the gear shifting handle is maintained at a non-parking gear, the corresponding failure fault comprises the unexpected parking brake entering fault, and the post-treatment measure comprises the parking brake releasing control.
4. A failure management method of an electronic control parking system according to claim 3, wherein, when the entry parking brake failure occurs, the entry parking brake control step includes:
collecting parking control information and parking control state information, judging success or failure of entering a parking brake, wherein,
if the parking control state information indicates that the parking brake is already entered, judging that the entering of the parking brake control is successful;
if the parking control state information indicates that the parking brake is not entered, and the response times of entering the parking brake reach an entering response threshold value, judging that the control of entering the parking brake fails;
if the parking control state information indicates that the parking brake is not entered, and the response times of the entering parking brake do not reach an entering response threshold value, continuing to control the entering parking brake;
when the failure fault of releasing the parking brake occurs, the step of controlling the releasing of the parking brake comprises the following steps:
collecting the parking control information and the parking control state information, judging whether the release of the parking brake is successful or failed, wherein,
if the parking control state information indicates that the parking brake is released, judging that the control of releasing the parking brake is successful;
if the parking control state information indicates that the parking brake is not released and the response times of releasing the parking brake reach a release response threshold, judging that the control of releasing the parking brake fails;
and if the parking control state information indicates that the parking brake is not released and the response times of releasing the parking brake do not reach the release response threshold value, continuing to control the releasing of the parking brake.
5. The method of claim 4, wherein the entry response threshold and the release response threshold are each 3 times.
6. The method of claim 4, wherein the entering parking brake control step includes, when the unexpected release of the parking brake failure occurs:
collecting the parking control state information, judging success or failure of entering the parking brake, wherein,
if the parking control state information indicates that the parking brake is already entered, judging that the entering of the parking brake control is successful;
if the parking control state information indicates that the parking brake is not entered, judging that the control of entering the parking brake fails, and taking the control as the failure of entering the parking brake, and performing the post-processing measure;
when the unexpected parking brake fault occurs, the step of releasing the parking brake control includes:
collecting parking control state information, judging whether the parking brake is successfully released or not, wherein,
if the parking control state information indicates that the parking brake is released, judging that the control of releasing the parking brake is successful;
and if the parking control state information indicates that the parking brake is not released, continuing to release the parking brake control.
7. The method for managing the failure of an electronically controlled parking system according to claim 6, wherein when it is determined that the parking brake control is failed, the shift lever is put in a parking position and the electronic parking brake system is requested to control a parking brake.
8. The failure management method of an electronic control parking system according to any one of claims 1 to 7, characterized in that the failure management method further includes: according to the failure fault and the post-processing measures, the vehicle sends out prompt information to remind a driver; wherein,,
the prompting information comprises a gear or gear flicker prompt displayed at a gear display position of the instrument board.
9. The method for managing the failure of the electronic control parking system according to claim 8, wherein the prompting message further includes displaying text on the dashboard, prompting the occurrence of the failure fault.
10. The method for failure management of an electronic control parking system according to claim 9, wherein the prompting message further includes issuing an alarm sound.
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|---|---|---|---|
| CN202111272921.XA CN116061907A (en) | 2021-10-29 | 2021-10-29 | Failure management method of electric control parking system |
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| CN202111272921.XA CN116061907A (en) | 2021-10-29 | 2021-10-29 | Failure management method of electric control parking system |
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