Dual clutch transmission shift solenoid valve stuck diagnosis method, system and vehicle

Abstract

The present invention discloses a dual clutch transmission shift solenoid valve stuck diagnosis method, system and vehicle, the method steps specifically include: detecting whether the shift solenoid valve meets the preset conditions for performing stuck fault detection; performing stuck fault diagnosis on different shift solenoid valves, detecting abnormal fork movement and / or gear position abnormality during the shifting process, and determining different stuck fault detection states; performing stuck fault identification and analysis according to different stuck fault detection states; real-time output of stuck fault detection results, and implementation of corresponding fault resolution strategies, the system and vehicle correspond to the method. The present invention can perform fault identification and analysis on abnormal fork movement, judge and output the stuck form of the corresponding shift solenoid valve before the abnormal gear position causes actual impact, and perform corresponding fault processing, and can output multiple shift solenoid valve stuck forms equivalently according to the shifting situation, assist in valve body fault judgment, and perform fault processing to ensure driving safety.

Description

Technical Field

[0001] The present invention relates to a solenoid valve stuck diagnosis method, system and vehicle, and in particular to a dual-clutch transmission shift solenoid valve stuck diagnosis method, system and vehicle. Background Art

[0002] The dual-clutch transmission applies controllable shift force to the shift fork through the pressure or flow generated by the shift solenoid valve in the oil-electrically controlled hydraulic valve body. The shift fork realizes the synchronization of the shift shaft speed and the gear switching by pushing the synchronizer and the shift gear components. The dual-clutch transmission has two sets of shaft-tooth transmission systems. Each shaft-tooth system has multiple shift fork actuators according to the number of gears. When the two shaft-tooth systems are working, one set is for the actual gear to transmit torque in the gear, and the other set is prepared to prepare the pre-selected gear according to the driving conditions. By switching the actual torque transmission shaft, the gear can be switched quickly. There are usually the following two problems in the prior art:

[0003] Question 1: Currently, the common shift solenoid valve sticking fault is detected through incorrect shift execution results. This detection method has a small fault detection window during actual driving and the fault state lasts for a long time, which can easily cause the working gear to be disengaged and the two gears to conflict, causing power abnormalities and even damage to the transmission shift system components.

[0004] Question 2: When the gear shifting is caused by abnormal conditions such as impurity blockage in the valve body and does not belong to the case of a single solenoid valve stuck failure, it is impossible to clearly identify the current fault status and protection measures.

[0005] The problems existing in the above-mentioned prior art have not been effectively improved and can no longer meet people's needs. Summary of the invention

[0006] The purpose of the present invention is to provide a dual-clutch transmission shift solenoid valve stuck diagnosis method, system and vehicle. The first technical problem to be solved is to prevent the working gear from being disengaged and the gear conflict due to the small fault detection window period and the long duration of the fault state during actual driving; the second technical problem to be solved is to determine which specific solenoid valve the sticking fault belongs to.

[0007] Another technical problem to be solved by the present invention is to detect the fault type at the early stage of abnormal gear shifting and before affecting normal driving by real-time monitoring of the changes in the gearbox actuator.

[0008] Another technical problem to be solved by the present invention is to be able to equivalently output multiple shift solenoid valve sticking forms according to the shifting conditions, assist in valve body fault judgment, and perform fault processing to ensure driving safety.

[0009] The present invention provides the following scheme:

[0010] A dual clutch transmission shift solenoid valve stuck diagnosis method, specifically comprising:

[0011] Detecting whether the shift solenoid valve meets the preset conditions for performing a stuck fault detection;

[0012] Perform stuck fault diagnosis on different shift solenoid valves, detect abnormal fork movement and / or gear position abnormalities during the shift process, and determine different stuck fault detection states;

[0013] According to different stuck fault detection states, the stuck fault is identified and analyzed;

[0014] Output stuck fault detection results in real time and implement corresponding fault resolution strategies.

[0015] Furthermore, the preset conditions for the stuck fault detection are specifically:

[0016] Detect the current gearbox shifting status and type, and eliminate other faults other than the shift solenoid valve stuck fault;

[0017] During the gear shifting process, the gear shifting type of the target gear shift fork is detected, and the stabilization time of the gear shift fork in neutral and in gear is determined;

[0018] Eliminate other fault conditions other than the solenoid valve stuck fault and determine the actual shift time of the current shift execution solenoid valve;

[0019] The shift solenoid valve specifically includes: a multi-way valve, a shift action execution valve and a non-target gear shift flow valve.

[0020] Furthermore, the shift solenoid valve is a multi-way valve, and the method for diagnosing the stuck state of the multi-way valve specifically includes:

[0021] According to the target gear position and the current gearbox structure, the control unit identifies and calculates the current unexpected gear position of the multi-way valve;

[0022] During the target shift control process, judging whether the current multi-way valve has a stuck fault according to whether the multi-way valve control state and the multi-way valve stuck state are opposite;

[0023] Detect whether the unexpected shift fork has moved and determine whether the current multi-way valve has a stuck fault;

[0024] Determine the output multi-way valve stuck fault type and implement corresponding fault handling strategies according to different fault types.

[0025] Further, judging whether a stuck fault occurs in the current multi-way valve according to whether the multi-way valve control state and the stuck state of the multi-way valve are opposite is specifically as follows:

[0026] The state of the target gear control multi-way valve is ON, the multi-way valve is stuck in the OFF position, or:

[0027] The state of the target gear control multi-way valve is OFF, and the multi-way valve is stuck in the ON position;

[0028] The detecting whether the unexpected shift fork is actuated is specifically: detecting whether the unexpected shift fork is actuated when the multi-way valve is switched to the target position; if the unexpected shift fork is actuated, it is determined that a jamming fault exists in the current multi-way valve.

[0029] Furthermore, the shift action execution valve includes a shift pressure valve and a shift flow valve;

[0030] Detecting whether the shift pressure valve and the shift flow valve have a stuck fault;

[0031] Determine the stuck fault type of the output shift action execution valve, wherein the stuck fault type is specifically stuck in the ON state or the OFF state;

[0032] During the process of shifting gears, the actual shift fork position is monitored in real time;

[0033] The decision outputs the stuck fault type of the shift action actuator valve, and implements the corresponding fault handling strategy according to the stuck fault type.

[0034] Further, detecting whether the shift pressure valve and the shift flow valve have a stuck fault specifically includes:

[0035] For the shift pressure valve, the sticking fault is that the shift pressure valve outputs unexpectedly high pressure when it is closed or slightly opened;

[0036] For the shift flow valve, the specific jamming fault is:

[0037] When the target gear position controls the shift flow valve to output forward flow, the shift flow valve is stuck at the position of outputting reverse flow;

[0038] When the target gear position controls the shift flow valve to output reverse flow, the shift flow valve is stuck at the position of outputting forward flow;

[0039] Detect whether the abnormal gear position during the gear shifting process is related to the multi-way valve. If the multi-way valve is abnormal, re-judge and replace the target gear position and the unexpected gear position;

[0040] The implementation of a corresponding fault handling strategy according to the type of the stuck fault specifically includes:

[0041] When the shifting solenoid valve fails, the current gear shift is decided based on the gear status on the current shift shaft to determine whether to change the current gear to the faulty gear.

[0042] For some hydraulic systems that only affect single-axis shifting, the non-faulty axis is used when a single shift execution solenoid valve fails;

[0043] If both axles are changed to the faulty gear and cannot be shifted again, always drive in the gear on the axle.

[0044] Further, detecting whether the non-target gear shift flow valve fault detection state meets a preset condition, and when the preset condition is met, detecting the type of the non-target gear shift flow valve fault detection state;

[0045] According to the detection state of the non-target gear shift flow valve fault, it is determined whether the non-target gear shift flow valve has a stuck fault;

[0046] Decision output non-target gear shift flow valve stuck fault type;

[0047] When a shift flow valve jam fault occurs during a gear shift execution and a non-target gear is not performed, the corresponding fault handling strategy is executed.

[0048] Furthermore, the detection state of the non-target gear shift flow valve failure specifically includes:

[0049] First fault detection state: the current action is to engage a gear, the unexpected shift fork is initially in neutral, the expected shift fork is moving from neutral to the target gear, the unexpected shift fork is moving from neutral to the unexpected gear, and the shift fork displacement meets the fault detection requirements;

[0050] Second fault detection state: the current action is to engage a gear, the unexpected gear is in the engaged state at the beginning of the unexpected shift fork shift, the expected shift fork is moving from the neutral gear to the expected gear, the unexpected shift fork is moving from the unexpected gear to the neutral gear, and the shift fork displacement meets the fault detection requirements;

[0051] The third fault detection state: the current action is shifting, the unexpected shift fork is in neutral when the shift is initially shifted, the expected shift fork is moving from the expected gear to neutral, the unexpected shift fork is moving from neutral to the unexpected gear, and the shift fork displacement meets the fault detection requirements;

[0052] Fourth fault detection state: the current action is to disengage the gear, the unexpected gear position is in the engaged state at the beginning of the unexpected shift fork shift, the expected shift fork is moving from the expected gear position to the neutral gear, the unexpected shift fork is moving from the unexpected gear position to the neutral gear, and the shift fork displacement meets the fault detection requirements;

[0053] When the four conditions in the first, second, third and fourth fault detection states are met at the same time, it is determined that the non-target gear shift flow valve is stuck, resulting in an unexpected gear being in neutral or in a gear slipping trend.

[0054] A dual clutch transmission shift solenoid valve stuck diagnosis system, specifically comprising:

[0055] A shift solenoid valve stuck fault detection condition preset module, used to detect whether the shift solenoid valve meets the preset conditions for performing stuck fault detection;

[0056] A shift solenoid valve stuck fault diagnosis module is used to diagnose the stuck fault of different shift solenoid valves, detect abnormal fork movement and / or gear position abnormality during the shifting process, and determine different stuck fault detection states;

[0057] A shift solenoid valve stuck fault identification and analysis module is used to identify and analyze stuck faults according to different stuck fault detection states;

[0058] The shift solenoid valve stuck fault solution strategy module is used to output the stuck fault detection results in real time and implement the corresponding fault solution strategy.

[0059] An electronic device comprises: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the method.

[0060] A computer-readable storage medium stores a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of a method.

[0061] A vehicle, comprising:

[0062] An electronic device for implementing a dual clutch transmission shift solenoid valve stuck diagnosis method;

[0063] a processor, the processor running a program, and when the program is running, executing the steps of a dual-clutch transmission shift solenoid valve stuck diagnosis method for data output from the electronic device;

[0064] A storage medium for storing a program, wherein when the program is run, the steps of a dual-clutch transmission shift solenoid valve stuck diagnosis method are executed for data output from an electronic device;

[0065] Compared with the prior art, the present invention has the following advantages:

[0066] The shift solenoid valve in the present invention identifies the actual shift fork position through the transmission control unit to perform closed-loop control and output a changing current, which can realize the pre-selected gear switching function, and performs fault identification and analysis based on the abnormal fork movement phenomenon generated in different types of shifting processes. Before the abnormal gear causes actual impact, the corresponding shift solenoid valve (shift execution valve, multi-way valve) sticking form is judged and output, and corresponding fault processing is performed. According to the shifting situation, multiple shift solenoid valve sticking forms can be equivalently output to assist in valve body fault judgment, and fault processing is performed to ensure driving safety.

[0067] The present invention performs solenoid valve stuck fault detection during the gear shifting process, detects whether the gear shifting solenoid valve meets the preset conditions for the stuck fault detection, eliminates the interference of other stuck faults, performs stuck fault diagnosis on different gear shifting solenoid valves and determines different stuck fault detection states, outputs the stuck fault detection result in real time, and implements the corresponding fault resolution strategy before the abnormal gear position caused by the stuck fault causes actual impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0069] Figure 1 It is a flow chart of the diagnosis method of the stuck shift solenoid valve of the dual clutch transmission.

[0070] Figure 2 It is the architecture diagram of the dual clutch transmission shift solenoid valve stuck diagnostic system.

[0071] Figure 3 It is a flow chart of the method for diagnosing a stuck multi-way valve.

[0072] Figure 4 It is a flow chart of the method for diagnosing the sticking of the shift action actuator valve.

[0073] Figure 5 It is a flow chart of a method for diagnosing a non-target shift flow valve sticking.

[0074] Figure 6 is a method flow chart of another specific embodiment.

[0075] Figure 7 It is a structural diagram of an electronic device. DETAILED DESCRIPTION

[0076] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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 are within the scope of protection of the present invention.

[0077] In an embodiment of the present invention, the shift solenoid valve identifies the actual shift fork position through the transmission control unit to perform closed-loop control, output a variable current, and realize the pre-selected gear switching. Common shift solenoid valves include shift pressure valves, shift flow valves, multi-way switch valves, etc. In the embodiment of the present invention, the shift execution solenoid valve refers to the shift pressure valve and the shift flow valve. The shift execution solenoid valve determines the movement direction and speed of the shift fork. The function of the multi-way valve is to select the shift fork. In the embodiment of the present invention, the multi-way valves are all switch valves. The shift execution valve and the multi-way valve will produce a fixed gear under a fixed combination. When the shift solenoid valve is stuck, an unexpected gear will be executed, so further identification and judgment are required to determine the actual fault type.

[0078] like Figure 1 As shown, the dual clutch transmission shift solenoid valve stuck diagnosis method specifically includes the following steps:

[0079] Step S1, detecting whether the shift solenoid valve meets the preset conditions for performing a stuck fault detection;

[0080] Specifically, the preset conditions for stuck fault detection are:

[0081] Detect the current gearbox shifting status and type, and eliminate other faults other than the shift solenoid valve stuck fault;

[0082] During the gear shifting process, the gear shifting type of the target gear shift fork is detected, and the stabilization time of the gear shift fork in neutral and in gear is determined. The gear shifting type includes neutral to gear or in gear to gear out;

[0083] Eliminate other faults other than solenoid valve stuck faults, determine the actual shift time of the current shift execution solenoid valve, and ensure that the shift pressure generated by the solenoid valve actually acts on the shift fork;

[0084] When the above preset conditions are met at the same time, the current gear shift can be diagnosed with multi-way valve sticking. If not, the current gear shift cannot be diagnosed with multi-way valve sticking and needs to be detected through other subsequent gear shifts.

[0085] The shift solenoid valve specifically includes: a multi-way valve, a shift action execution valve and a non-target gear shift flow valve.

[0086] Step S2, performing a stuck fault diagnosis on different shift solenoid valves, detecting abnormal shift fork movement and / or abnormal gear position during the shifting process, and determining different stuck fault detection states;

[0087] Step S3, identifying and analyzing the stuck fault according to different stuck fault detection states;

[0088] Specifically, in the embodiments of the present invention, those skilled in the art can understand the meaning of identifying and analyzing stuck faults, wherein the specific explanation of identification and analysis includes but is not limited to detecting the stuck fault state of the shift solenoid valve and / or the stuck fault state of the decision output solenoid valve, the shift execution valve and the multi-way valve will produce a fixed gear under a fixed combination, including but not limited to identifying and judging the unexpected gear that will be executed when the shift solenoid valve is stuck, determining the actual fault type, etc., and implementing corresponding solution strategies for the stuck fault of the shift solenoid valve in specific situations.

[0089] Step S4, real-time output of the jam fault detection result, and implementation of the corresponding fault resolution strategy; the purpose of step S4 is to implement the corresponding fault resolution strategy before the abnormal gear caused by the jam fault causes actual impact, and the actual impact may include: working gear disengagement, gear conflict, power abnormality, and even damage to the gearbox shifting system components.

[0090] Preferably, the shift solenoid valve is a multi-way valve, and the method for diagnosing the stuck state of the multi-way valve specifically includes:

[0091] According to the target gear position and the current gearbox structure, the control unit identifies and calculates the current unexpected gear position of the multi-way valve;

[0092] During the target shift control process, judging whether the current multi-way valve has a stuck fault according to whether the multi-way valve control state and the multi-way valve stuck state are opposite;

[0093] Detect whether the unexpected shift fork has moved and determine whether the current multi-way valve has a stuck fault;

[0094] Determine the output multi-way valve stuck fault type and implement corresponding fault handling strategies according to different fault types.

[0095] Specifically, according to whether the multi-way valve control state and the multi-way valve stuck state are opposite, it is judged whether the current multi-way valve has a stuck fault, specifically:

[0096] The state of the target gear control multi-way valve is ON, the multi-way valve is stuck in the OFF position, or:

[0097] The state of the target gear control multi-way valve is OFF, and the multi-way valve is stuck in the ON position;

[0098] Detect whether the unexpected fork moves, specifically: detect whether the unexpected fork moves when the multi-way valve is switched to the target position. If the unexpected fork moves, it is determined that the current multi-way valve has a stuck fault.

[0099] The shift action execution valve includes a shift pressure valve and a shift flow valve;

[0100] Check whether the shift pressure valve and shift flow valve are stuck;

[0101] The decision output shift action execution valve stuck fault type, the stuck fault type is specifically stuck in the ON state or the OFF state;

[0102] During the process of shifting gears, the actual shift fork position is monitored in real time;

[0103] The decision outputs the stuck fault type of the shift action actuator valve, and implements the corresponding fault handling strategy according to the stuck fault type.

[0104] Specifically, detecting whether the shift pressure valve and the shift flow valve are stuck or not includes:

[0105] For the shift pressure valve, the sticking fault is that the shift pressure valve outputs unexpectedly high pressure when it is closed or slightly opened;

[0106] For the shift flow valve, the specific jamming fault is:

[0107] When the target gear position controls the shift flow valve to output forward flow, the shift flow valve is stuck at the position of outputting reverse flow;

[0108] When the target gear position controls the shift flow valve to output reverse flow, the shift flow valve is stuck at the position of outputting forward flow;

[0109] Exemplarily, the states of the solenoid valve include: solenoid valve ON (outputting forward flow), solenoid valve OFF (outputting reverse flow), solenoid valve Izero (not outputting shift flow), ON and OFF correspond to two different shift directions, and when the solenoid valve is stuck, only when the target gear is opposite to the stuck state, the abnormal movement direction can be detected to diagnose the fault. In this embodiment, the solenoid valve refers to the shift flow valve.

[0110] Detect whether the abnormal gear position during the gear shifting process is related to the multi-way valve. If the multi-way valve is abnormal, re-judge and replace the target gear position and the unexpected gear position;

[0111] Implement corresponding fault handling strategies according to the type of stuck fault, including:

[0112] When the shifting solenoid valve fails, the current gear shift is decided based on the gear status on the current shift shaft. After changing to the faulty gear, the shaft cannot shift gears again.

[0113] When a single shifting solenoid valve of some hydraulic systems fails, the shifting of only one axis is affected, and the non-faulty axis is used;

[0114] After both axles are changed to the fault gear, the system will not be able to shift gears again and will always maintain the gear on the axle during this power-on cycle.

[0115] Preferably, detecting whether the non-target gear shift flow valve fault detection state satisfies a preset condition, and when the preset condition is met, detecting the type of the non-target gear shift flow valve fault detection state;

[0116] Specifically, the detection state of the non-target gear shift flow valve failure includes:

[0117] First fault detection state:

[0118] The current action is to engage a gear, the unexpected shift fork is initially in neutral, the expected shift fork is moving from neutral to the target gear, the unexpected shift fork is moving from neutral to the unexpected gear, and the shift fork displacement meets the fault detection requirements.

[0119] The second fault detection state: the current action is to engage a gear, the unexpected gear is in the engaged state when the unexpected shift fork is initially shifted, the expected shift fork is moving from neutral to the expected gear, the unexpected shift fork is moving from the unexpected gear to neutral, and the shift fork displacement meets the fault detection requirements.

[0120] The third fault detection state: the current action is to shift gears, the unexpected shift fork is in neutral when the gear shift is initially performed, the expected shift fork is moving from the expected gear to neutral, the unexpected shift fork is moving from neutral to the unexpected gear, and the shift fork displacement meets the fault detection requirements.

[0121] Fourth fault detection state: the current action is to shift gears, the unexpected gear is in the engaged state when the unexpected shift fork is initially shifted, the expected shift fork is moving from the expected gear to the neutral gear, the unexpected shift fork is moving from the unexpected gear to the neutral gear, and the shift fork displacement meets the fault detection requirements.

[0122] When the four conditions in the first, second, third and fourth fault detection states are met at the same time, it is determined that the non-target gear shift flow valve is stuck, resulting in an unexpected gear being in neutral or in a gear slipping trend.

[0123] According to the detection status of the non-target gear shift flow valve fault, it is determined whether the non-target gear shift flow valve has a stuck fault, resulting in an unexpected neutral position or a tendency to slip out of the gear;

[0124] The decision output is the stuck fault type of the non-target gear shift flow valve, and the fault type is divided into stuck in the ON or OFF state;

[0125] When a shift flow valve jam fault occurs during a gear shift execution and a non-target gear is not performed, the corresponding fault handling strategy is executed.

[0126] For the method steps disclosed in the above embodiments, the method steps are described as a series of action combinations for the purpose of simple description, but those skilled in the art should know that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0127] like Figure 2 The dual clutch transmission shift solenoid valve stuck diagnostic system shown includes:

[0128] A shift solenoid valve stuck fault detection condition preset module, used to detect whether the shift solenoid valve meets the preset conditions for performing stuck fault detection;

[0129] The shift solenoid valve stuck fault diagnosis module is used to diagnose the stuck fault of different shift solenoid valves, detect abnormal fork movement during the shift process, and determine different stuck fault detection states;

[0130] A shift solenoid valve stuck fault identification and analysis module is used to identify and analyze stuck faults according to different stuck fault detection states;

[0131] The shift solenoid valve stuck fault solution strategy module is used to output the stuck fault detection results in real time and implement the corresponding fault solution strategy.

[0132] It is worth noting that although only some basic functional modules are disclosed in this embodiment, it does not mean that the composition of this system is limited to the above basic functional modules. On the contrary, what this embodiment wants to express is that on the basis of the above basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the prior art to form an infinite number of embodiments or technical solutions. In other words, this system is open rather than closed. Just because this embodiment only discloses individual basic functional modules, it cannot be considered that the protection scope of the claims of the present invention is limited to the disclosed basic functional modules. At the same time, for the convenience of description, the above devices are described in terms of functions and are described separately in various units and modules. Of course, when implementing the present invention, the functions of each unit and module can be implemented in the same or one or more software and / or hardware.

[0133] The device implementation described above is merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present implementation scheme. Those of ordinary skill in the art may understand and implement it without creative work.

[0134] like Figure 3 The multi-way valve stuck diagnosis method process shown specifically includes:

[0135] Step A01: The solenoid valve stuck fault detection must be performed during the gear shifting process, and the gear shifting type must be the following two: ① The current target gear shift fork is neutral -> engaged, ② The current target gear shift fork is in gear -> disengaged, ③ The target gear shift fork is stable in neutral and in gear for more than time T0;

[0136] Step A02: Multi-way valve solenoid valve stuck fault detection conditions:

[0137] ① The solenoid valve stuck fault detection needs to ensure that there is no electrical fault of the shift solenoid valve, electrical fault of the shift fork position sensor, or mechanical fault of the shift fork sensor. When the above faults exist, the corresponding fault processing is performed first to detect whether it is other faults other than the multi-way valve solenoid valve;

[0138] ② The actual shift control time of the current shift execution solenoid valve exceeds T1 to ensure that the shift pressure generated by the solenoid valve actually acts on the shift fork. Check whether the actual shift control time exceeds T1;

[0139] When the above conditions are met at the same time, the current gear shift can be used for multi-way valve sticking diagnosis. If not met, the current gear shift cannot be used for multi-way valve sticking diagnosis and needs to be detected through other subsequent gear shifts.

[0140] Step A03: Based on the target gear position and the current gearbox structure, the control unit software identifies and calculates the current unexpected gear position of the multi-way valve.

[0141] Different dual clutch valve body structures may have no multi-way valve or multiple multi-way valves. In the case of no multi-way valve, there is no need to perform multi-way valve stuck diagnosis. Single or multiple multi-way valves can be tested through the following process:

[0142] The multi-way valve realizes the fork selection function in the shift actuator. The multi-way valve has two states, ON and OFF. The target gear position is actually one of the two states, ON and OFF, during the control process. Only when the multi-way valve control state and the stuck state are opposite, can the fault be diagnosed. Therefore, the current diagnosis of multi-way valve stuck is the following two situations:

[0143] ① The fault target gear position controls the multi-way valve ON, and the multi-way valve is stuck in the OFF position;

[0144] ② The fault target gear position control multi-way valve is OFF, and the multi-way valve is stuck in the ON position;

[0145] Since the multi-way valve is only used to select the shift fork, it is only necessary to detect the unexpected abnormal state of the shift fork. Whether there are other abnormalities in the specific unexpected gear position can be detected through other shift solenoid valve sticking detection processes in other embodiments.

[0146] In the target gear shift control, the multi-way valve will switch to the target position, and the target position corresponding fork is set to ForkA. In different structures, ForkA can be multiple. The unexpected fork is ForkX, and similarly, the unexpected fork ForkX can also be multiple. If the unexpected fork ForkX moves during the shift process, it means that the current multi-way valve is stuck. The shift gears corresponding to the unexpected fork ForkX are the unexpected gear GearX and the unexpected gear GearY. When the current multi-way valve is stuck, the fault is judged by the changes in the gear positions of the unexpected gear GearX and the unexpected gear GearY.

[0147] Step A04: There are two states of multi-way valve fault detection:

[0148] State ①: 1. The target multi-way valve forks are not moving; 2. The unexpected ForkX is initially in the neutral position during the gear shift; 3. The unexpected ForkX is moving from the neutral position to the unexpected gear GearX, and the minimum fault detection variable M (mm) < fork displacement < fork neutral limit position N (mm) is satisfied. The values ​​of M and N are related to the actual mechanical structure of the fork gear.

[0149] When the three conditions of state ① are met at the same time, it is determined that the current multi-way valve is stuck, resulting in an unexpected gear position being in a neutral disengagement trend.

[0150] State ②: 1. The target multi-way valve forks are not moving; 2. The unexpected fork ForkX is initially in the in-gear position of the unexpected gear GearY; 3. The unexpected fork ForkX is moving from the unexpected fork GearY to the neutral gear, and the minimum fault detection variable M (mm) < fork displacement < fork neutral limit position N (mm) is satisfied. The M and N values ​​are related to the actual mechanical structure of the fork gear.

[0151] When the three conditions of state ② are met at the same time, it is determined that the current multi-way valve is stuck, resulting in an unexpected gear position being in a gear release trend.

[0152] Step A05: When detecting the above states ① and ② in the current gear shifting process, it is determined that there is a multi-way valve stuck fault. The two states are not detected in the gear shifting process, which proves that the current gear shifting does not have the fault or the current gear shifting cannot detect the fault and needs to be detected through other subsequent gear shifting.

[0153] Step A06: Output the multi-way valve stuck fault type of the decision, the fault type is divided into stuck in the ON state and stuck in the OFF state, and the fault state output is opposite to the current target gear control.

[0154] When a multi-way valve stuck fault occurs in the system, the following processing is required:

[0155] ①When a multi-way valve failure occurs in the system, only the shift fork and gear position in the fault state are available;

[0156] ② The shift fork cannot be disengaged unexpectedly, and the previous gear is maintained. When there is a non-disengageable gear on the current shift shaft, other gears on the shaft are unavailable;

[0157] ③ Based on the above two items, the actual available gears of the system can be obtained. The control software organizes the gear shifting decision according to the available gears.

[0158] Determines the jamming fault type of the output multi-way valve.

[0159] like Figure 4 The flowchart of the shift action execution valve sticking diagnosis method shown in FIG. 1 includes the following steps:

[0160] Step B01: Shift action execution valve diagnosis gear shift type is the same as step A01;

[0161] Step B02: The shift action execution valve diagnosis conditions are the same as those of step A02;

[0162] Step B03: Identify the unexpected gear position of the current gear shift actuator valve through the control unit software according to the target gear position. The gear shift actuator valve refers to the solenoid valve that determines the gear shift direction of the shift fork during the current gear shift action. In this embodiment, two types of solenoid valves are mainly suitable:

[0163] ① Shift pressure valve, two solenoid valves control the pressure at both ends of the shift fork and control the movement of the shift fork;

[0164] ② Shift flow valve: a single solenoid valve controls the flow direction, controls the force magnitude and direction of the shift fork, and controls the movement of the shift fork;

[0165] For type ① solenoid valves, the identifiable solenoid valve type is a non-pressure-applied solenoid valve stuck in the normally open ON state, that is, the solenoid valve outputs unexpectedly high pressure when it is closed or slightly opened.

[0166] For type ② solenoid valve, a single solenoid valve determines the movement direction of the shift fork. Set the solenoid valve ON (output forward flow), solenoid valve OFF (output reverse flow), solenoid valve Izero (no shift flow output), ON and OFF correspond to two different shift directions. When the solenoid valve is stuck, only when the target gear is opposite to the stuck state, the abnormal movement direction can be diagnosed. Therefore, the current diagnosis of shift flow valve stuck is the following two situations:

[0167] ① The fault target gear position controls the shift flow valve to be ON, and the shift flow valve is stuck in the OFF position;

[0168] ② The fault target gear position controls the shift flow valve OFF, and the shift flow valve is stuck in the ON position;

[0169] In the target gear shift control, the shift action actuator valve will gradually increase the shift pressure according to the shift progress. Due to the stuck state, the shift fork will shift in direction.

[0170] The target position corresponding to the shift fork is set to ForkA, and the target gear is GearA. The unexpected gear GearZ has the same shift fork as GearA. During the shifting process, if the gear moves abnormally to the unexpected gear GearZ, it means that the shifting action execution valve is stuck.

[0171] Step B04, when the system has multiple shift solenoid valves with abnormal control, the abnormal gear position detected during the shift process is related to the multi-way valve, and it is necessary to re-judge and replace the target gear position and the unexpected gear position based on the multi-way valve abnormality.

[0172] Step B05, according to the current state and type of the multi-way valve stuck, the target gear position, target shift fork and unexpected gear position are replaced by the gear position and shift fork under the multi-way valve failure.

[0173] Step B06, the fault detection status of the shift action execution valve includes: 1. The current shift action is to engage a gear; 2. ForkA is initially in the neutral position; 3. ForkA is moving from neutral to GearZ, and satisfies the minimum fault detection variable M (mm) < fork displacement < fork neutral limit position N (mm), and the M and N values ​​are related to the actual mechanical structure of the fork gear position.

[0174] When the above three conditions are met at the same time, it is determined that the current shift action execution valve is stuck, resulting in an unexpected gear position being in a neutral disengagement trend.

[0175] Step B07, detect the current gear shift process, if the above state occurs, it is determined that there is a gear shift action execution valve stuck fault. The state is not detected during the gear shift process, which proves that the current gear shift does not have this fault or the current gear shift cannot detect this fault, and needs to be detected through other subsequent gear shifts.

[0176] Step B08, outputting the decided shift action execution valve stuck fault type, the fault type is divided into stuck in ON state and stuck in OFF state.

[0177] The system uses two shift pressure valves to control the shift: the output non-pressure solenoid valve is stuck in the normally open ON. The system uses the shift flow valve to control the shift: the fault state output is opposite to the current target gear control.

[0178] For example: when the current target gear position controls the shift flow valve solenoid valve state to be ON (outputting forward flow), the shift flow valve is stuck in the OFF position (outputting reverse flow).

[0179] When the shift execution solenoid valve is stuck, the following processing is required:

[0180] ① When the shifting solenoid valve fails, the current gear status on the shift shaft determines whether the current gear can be changed to the faulty gear. After changing to the faulty gear, the shaft cannot shift gears again.

[0181] ② When a single shifting solenoid valve of some hydraulic systems fails, it can affect the shifting of only a single axis, and the non-faulty axis can be used.

[0182] ③ After both axles are changed to the faulty gear, the system will not be able to shift gears again, and the gear on the axle will always be maintained during this power-on cycle.

[0183] like Figure 5 The flowchart of the non-target shift flow valve stuck diagnosis method shown in FIG. 1 includes the following steps:

[0184] Step C01, non-target shift flow valve stuck diagnosis gear shift type is the same as step A01;

[0185] Step C02, the non-target shift flow valve stuck diagnosis condition is the same as step A02;

[0186] Step C03, when the shift flow valve is used as a shift execution solenoid valve, during the shift process, the target shift flow valve is in the ON or OFF state, and the other non-target shift flow valves are in the Izero (no shift flow output) non-control flow state. When the non-target shift solenoid valve is stuck, a variety of abnormal disengagement phenomena will occur, which need to be distinguished and identified during the shift process.

[0187] When the non-target shift flow valve is stuck, the non-target shift flow valve is operated simultaneously with the target gear position and the non-intended gear position corresponding to the non-target shift flow valve is also operated.

[0188] In the target gear shift control, the shift action execution valve will switch to the target position, the target position corresponding to the fork is set to ForkA, and the target gear is GearA. Unexpected fork ForkB, according to different shift mechanism structures, there may be multiple unexpected forks, and the diagnosis method is the same. In this embodiment, only one example of an unexpected fork structure is given: the unexpected fork ForkB is in the upper gear position, and the corresponding gears are GearM and GearN respectively.

[0189] Step C04, when the system has multiple shift solenoid valves with abnormal control, the abnormal gear position detected during the shift process is related to the multi-way valve, and it is necessary to re-judge and replace the target gear position and the unexpected gear position based on the multi-way valve abnormality.

[0190] Step C05, replacing the target gear position, target shift fork and unexpected gear position with the gear position and shift fork under the multi-way valve failure according to the current multi-way valve stuck state and type.

[0191] Step C06: the non-target gear shift flow valve fault detection states are divided into the following four types:

[0192] State ①: 1. The current action is to engage a gear, 2. ForkB is in neutral when the gear shift is initially performed, 3. ForkA is moving from neutral to GearA, 4. ForkB is moving from neutral to GearM or N, and the minimum fault detection variable M (mm) < fork displacement < fork neutral limit position N (mm) is satisfied. The M and N values ​​are related to the actual mechanical structure of the fork gear position.

[0193] State ② 1. The current action is to engage the gear, 2. Gear M or Gear N is engaged at the beginning of Fork B shifting, 3. Fork A is moving from neutral to Gear A, 4. Fork B is moving from Gear M or N to neutral, and the minimum fault detection variable M (mm) < fork displacement < fork in gear limit position N (mm) is satisfied. The M and N values ​​are related to the actual mechanical structure of the fork gear position.

[0194] State ③: 1. The current action is to shift gears; 2. ForkB is in neutral when the gear shift is initially performed; 3. ForkA is moving from GearA to neutral; 4. ForkB is moving from neutral to GearM or GearN, and the minimum fault detection variable M (mm) < fork displacement < fork in gear limit position N (mm) is satisfied. The M and N values ​​are related to the actual mechanical structure of the fork gear position.

[0195] State ④ 1. The current action is to shift gears; 2. GearM or GearN is engaged at the beginning of ForkB shifting; 3. ForkA is moving from GearA to neutral; 4. ForkB is moving from GearM or GearN to neutral, and the minimum fault detection variable M (mm) < fork displacement < fork in gear limit position N (mm) is satisfied. The M and N values ​​are related to the actual mechanical structure of the fork gear position.

[0196] When the four conditions in states ①, ②, ③, and ④ are met at the same time, it is determined that the non-target gear shift flow valve is stuck, resulting in an unexpected gear being in neutral or in a gear slipping trend.

[0197] Step C07, detect the current gear shift process, if the above state occurs, it is determined that there is a non-target gear shift flow valve stuck fault. This state is not detected during the gear shift process, which proves that the current gear shift does not have this fault or the current gear shift cannot detect this fault, and needs to be detected through subsequent other gear shifts.

[0198] Step C08, outputting the non-target gear shift flow valve stuck fault type of the decision, the fault type is divided into stuck in ON state and stuck in OFF state.

[0199] If GearM corresponds to the shift flow valve ON (forward flow) state, and GearN corresponds to the shift solenoid valve OFF (reverse flow) state:

[0200] ① The abnormal gear position is GearM, and the corresponding shift flow valve is stuck in the ON state;

[0201] ② The abnormal gear position is GearM, and the corresponding shift flow valve is stuck in the OFF state;

[0202] ③ The abnormal gear position is GearN, and the corresponding shift flow valve is stuck in the OFF state;

[0203] ④ The abnormal gear position is GearN, and the corresponding shift flow valve is stuck in the ON state;

[0204] When the system has a shift flow valve stuck fault when shifting to a non-target gear, the fault handling is the same as the above shift execution solenoid valve fault handling.

[0205] like Figure 6 As shown, the above-mentioned multiple embodiments such as the multi-way valve stuck diagnosis method, the shift action execution valve stuck diagnosis method and the non-target shift flow valve stuck diagnosis method can be combined with each other to form a new embodiment:

[0206] Solenoid valve stuck fault detection shift type:

[0207] ① The target shift fork is neutral -> engaged;

[0208] ②The target shift fork is in gear->out gear;

[0209] ③ The target shift fork is stable in neutral and in gear for a period of time exceeding time T0.

[0210] Solenoid valve stuck fault detection conditions:

[0211] ① The solenoid valve stuck fault detection needs to ensure that there is no electrical fault of the shift solenoid valve, electrical fault of the shift fork position sensor, or mechanical fault of the shift fork sensor. When the above faults exist, the corresponding fault processing is performed first.

[0212] ② The actual shift control time of the current shift execution solenoid valve exceeds T1 to ensure that the shift pressure generated by the solenoid valve actually acts on the shift fork.

[0213] Method for identifying unexpected gear positions of multi-way valves:

[0214] Method for identifying a single or multiple unexpected ForkX and its corresponding shift positions GearX and GearY for detecting a stuck multi-way valve fault:

[0215] Status ①1. The target multi-way valve fork is not in motion; 2. ForkX is initially in the neutral position;

[0216] 3.ForkX is moving from neutral to GearX.

[0217] Status ② 1. The target multi-way valve forks are not moving 2. ForkX is initially in GearY 3. ForkX is moving from GearY to neutral.

[0218] Multi-way valve stuck fault type output:

[0219] The output of the multi-way valve stuck fault state is opposite to the target gear control.

[0220] Troubleshooting for multi-way valve stuck fault:

[0221] ①When a multi-way valve failure occurs in the system, only the shift fork and gear position in the fault state are available;

[0222] ② Unexpected shift fork, unable to complete shifting, retaining the previous gear. When there is a non-shifting gear on the current shift shaft, other gears on the shaft are unavailable;

[0223] ③ Based on the above two items, the actual available gears of the system can be obtained. The control software organizes the gear shifting decision according to the available gears.

[0224] Method for identifying unexpected gear position of shift actuator valve:

[0225] ① The target fork ForkA, the unexpected gear GearZ is the target gear and the same fork gear;

[0226] ② There is a multi-way valve stuck state at present, and the abnormal gear is replaced by the corresponding gear under the multi-way valve failure.

[0227] Method for identifying the status of the shift actuator valve stuck fault detection:

[0228] 1. The current gear shifting action is to engage a gear; 2. ForkA is initially in the neutral position; 3. ForkA is moving from neutral to GearZ.

[0229] Shift actuator valve stuck fault type output:

[0230] Shift pressure valve system: The output non-pressure solenoid valve is stuck in the normally open ON state;

[0231] Shift flow valve system: output is stuck in the opposite state to the current target gear control.

[0232] Troubleshooting when the shift actuator valve is stuck

[0233] ① When the shifting solenoid valve fails, the current gear status on the shift shaft determines whether the current gear can be changed to the faulty gear. After changing to the faulty gear, the shaft cannot shift gears again.

[0234] ② When a single shifting solenoid valve of some hydraulic systems fails, it can affect the shifting of only a single axis, and the non-faulty axis can be used.

[0235] ③ After both axles are changed to the faulty gear, the system will not be able to shift gears again, and the gear on the axle will always be maintained during this power-on cycle.

[0236] Method for identifying unexpected gear positions caused by non-target shift flow valve jam:

[0237] ① The fork ForkB corresponding to a single or multiple non-target shift flow valves controls the gear positions GearM and GearN;

[0238] GearM corresponds to the shift flow valve ON (forward flow) state, and GearN corresponds to the shift solenoid valve OFF (reverse flow) state.

[0239] ② There is a multi-way valve stuck state at present, and the abnormal gear is replaced by the corresponding gear under the multi-way valve failure.

[0240] Non-target shift flow valve stuck fault detection state identification method:

[0241] Status ① 1. The current action is to engage a gear; 2. ForkB is in neutral when the gear is initially shifted; 3. ForkA is moving from neutral to GearA; 4. ForkB is moving from neutral to GearM or N.

[0242] Status ② 1. The current action is to engage the gear; 2. Gear M or N is engaged when Fork B initially shifts gears; 3. Fork A is moving from neutral to Gear A; 4. Fork B is moving from Gear M or N to neutral.

[0243] Status ③ 1. The current action is to shift gears; 2. ForkB is in neutral when the gear shift is initially started; 3. ForkA is moving from GearA to neutral; 4. ForkB is moving from neutral to GearM or N.

[0244] Status④1. Current action is to shift gears; 2. ForkB is initially shifting gears and Gear M or N is engaged; 3. ForkA is moving from Gear A to neutral; 4. ForkB is moving from Gear M or N to neutral.

[0245] Non-target shift flow valve stuck fault type output:

[0246] ① The abnormal gear position is GearM, and the corresponding shift flow valve is stuck in the ON state

[0247] ① The abnormal gear position is GearM, and the corresponding shift flow valve is stuck in the OFF state

[0248] ② The abnormal gear position is GearN, and the corresponding shift flow valve is stuck in the OFF state

[0249] ② The abnormal gear position is GearN, and the corresponding shift flow valve is stuck in the ON state

[0250] Non-target shift flow valve stuck fault processing: the same as the shift execution solenoid valve fault processing in step S010.

[0251] The flowchart disclosed in the embodiments of the present invention or any process or method description described in other ways herein can be understood as: a module, fragment or part of a code representing one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations, which may not be in the order shown or discussed, including executing and implementing functions in a substantially simultaneous manner or in a reverse order according to the functions involved, or executing computer instructions and implementing corresponding functions according to program structures such as loops and branches, which can naturally be understood by those skilled in the art in the process of implementing the embodiments of the present invention.

[0252] like Figure 7 As shown, the present invention also discloses an electronic device and a storage medium corresponding to a dual-clutch transmission shift solenoid valve stuck diagnosis method and system:

[0253] An electronic device comprises: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of a dual-clutch transmission shift solenoid valve stuck diagnosis method.

[0254] A computer-readable storage medium stores a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of a dual-clutch transmission shift solenoid valve stuck diagnosis method.

[0255] The communication bus mentioned in the above electronic device can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0256] The electronic device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory. The operating system can be any one or more computer operating systems that implement electronic device control through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. In addition, in an embodiment of the present invention, the electronic device can be a handheld device such as a smart phone or a tablet computer, or can be an electronic device such as a desktop computer or a portable computer, which is not particularly limited in the embodiment of the present invention.

[0257] The execution subject of the electronic device control in the embodiment of the present invention may be an electronic device, or a functional module in the electronic device that can call and execute a program. The electronic device may obtain the firmware corresponding to the storage medium. The firmware corresponding to the storage medium is provided by the supplier. The firmware corresponding to different storage media may be the same or different, which is not limited here. After the electronic device obtains the firmware corresponding to the storage medium, the firmware corresponding to the storage medium may be written into the storage medium, specifically, the firmware corresponding to the storage medium may be burned into the storage medium. The process of burning the firmware into the storage medium may be implemented using existing technology, which will not be described in detail in the embodiment of the present invention.

[0258] The electronic device may also obtain a reset command corresponding to the storage medium. The reset command corresponding to the storage medium is provided by the supplier. The reset commands corresponding to different storage media may be the same or different, and are not limited here.

[0259] At this time, the storage medium of the electronic device is a storage medium in which the corresponding firmware is written, and the electronic device can respond to the reset command corresponding to the storage medium in the storage medium in which the corresponding firmware is written, so that the electronic device resets the storage medium in which the corresponding firmware is written according to the reset command corresponding to the storage medium. The process of resetting the storage medium according to the reset command can be implemented by the existing technology and will not be described in detail in the embodiments of the present invention.

[0260] The embodiment of the present invention further discloses a vehicle, which specifically comprises:

[0261] An electronic device for implementing a dual clutch transmission shift solenoid valve stuck diagnosis method;

[0262] a processor, the processor running a program, and when the program is running, executing the steps of a dual-clutch transmission shift solenoid valve stuck diagnosis method for data output from the electronic device;

[0263] A storage medium for storing a program, wherein when the program is run, the steps of a dual-clutch transmission shift solenoid valve stuck diagnosis method are executed for data output from an electronic device;

[0264] The vehicle disclosed in the embodiment of the present invention can identify and analyze faults based on abnormal fork movement phenomena generated during different types of gear shifting processes. Before the abnormal gear position causes actual impact, it can judge and output the corresponding gear shift solenoid valve (gear shift execution valve, multi-way valve) sticking mode and perform corresponding fault processing. It can output multiple gear shift solenoid valve sticking modes equivalently according to the gear shifting situation, assist in valve body fault judgment, and perform fault processing to ensure driving safety.

[0265] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0266] Those skilled in the art will appreciate that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined.

[0267] It should be noted that certain words are used in this specification and claims to refer to specific components. Those skilled in the art should understand that vehicle manufacturers may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be understood as "including but not limited to". The preferred embodiment of the present invention will be described later, but the description is based on the general principles of the specification and is not used to limit the scope of the present invention. The scope of protection of the present invention shall be based on the definition of the claims attached thereto.

[0268] The present invention may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present invention may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0269] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0270] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0271] In several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method can also be implemented in other ways. The apparatus embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the apparatus, method and computer program product according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0272] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0273] Those skilled in the art will appreciate that the modules in the devices in the embodiments can be adaptively changed and set in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition they can be divided into multiple submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including corresponding claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner can be combined in any combination. Unless otherwise explicitly stated, each feature disclosed in this specification (including corresponding claims, abstracts and drawings) can be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0274] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0275] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all functions of some or all components in the device for distributing messages according to an embodiment of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for executing part or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0276] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present invention can be implemented by means of hardware including several different elements and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order, and these words may be interpreted as names.

[0277] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual clutch transmission shift solenoid valve stuck diagnosis method, characterized in that: Specifically include: Detecting whether the shift solenoid valve meets the preset conditions for performing a stuck fault detection; Perform stuck fault diagnosis on different shift solenoid valves, detect abnormal fork movement and / or gear position abnormalities during the shift process, and determine different stuck fault detection states; According to different stuck fault detection states, the stuck fault is identified and analyzed; Output stuck fault detection results in real time and implement corresponding fault resolution strategies; The preset conditions for the stuck fault detection are specifically: Detect the current gearbox shifting status and type, and eliminate other faults other than the shift solenoid valve stuck fault; During the gear shifting process, the gear shifting type of the target gear shift fork is detected, and the stabilization time of the gear shift fork in neutral and in gear is determined; The shift types include neutral to gear, or gear to disengage gear; Eliminate other fault conditions other than the solenoid valve stuck fault and determine the actual shift time of the current shift execution solenoid valve; Wherein, according to determining the actual shifting time of the current shifting execution solenoid valve, it is ensured that the shifting pressure generated by the solenoid valve actually acts on the shift fork; the shifting solenoid valve specifically includes: a multi-way valve, a shifting action execution valve and a non-target gear shifting flow valve; wherein, determining whether the preset conditions for the stuck fault detection are met; If,satisfied, then diagnose the multi-way valve stuck according to the current gear shift; If, it is not satisfied, the diagnosis of multi-way valve sticking will not be performed; wherein, detecting whether a non-target gear shift flow valve fault detection state satisfies a preset condition, and when the preset condition is met, detecting the type of the non-target gear shift flow valve fault detection state; The detection state of the non-target gear shift flow valve failure specifically includes: First fault detection state: the current action is to engage a gear, the unexpected shift fork is initially in neutral, the expected shift fork is moving from neutral to the target gear, the unexpected shift fork is moving from neutral to the unexpected gear, and the shift fork displacement meets the fault detection requirements; Second fault detection state: the current action is to engage a gear, the unexpected gear is in the engaged state at the beginning of the unexpected shift fork shift, the expected shift fork is moving from the neutral gear to the expected gear, the unexpected shift fork is moving from the unexpected gear to the neutral gear, and the shift fork displacement meets the fault detection requirements; The third fault detection state: the current action is shifting, the unexpected shift fork is in neutral when the shift is initially shifted, the expected shift fork is moving from the expected gear to neutral, the unexpected shift fork is moving from neutral to the unexpected gear, and the shift fork displacement meets the fault detection requirements; Fourth fault detection state: the current action is to disengage the gear, the unexpected gear position is in the engaged state at the beginning of the unexpected shift fork shift, the expected shift fork is moving from the expected gear position to the neutral gear, the unexpected shift fork is moving from the unexpected gear position to the neutral gear, and the shift fork displacement meets the fault detection requirements; According to the detection state of the non-target gear shift flow valve fault, it is determined whether the non-target gear shift flow valve has a stuck fault; When the four conditions in the first, second, third and fourth fault detection states are met at the same time, it is determined that the non-target gear shift flow valve is stuck, resulting in an unexpected gear being in neutral or having a tendency to slip out of gear; Decision output non-target gear shift flow valve stuck fault type; When a shift flow valve jam fault occurs when a gear shift is executed in a non-target gear, a corresponding fault handling strategy is executed; Wherein, the shift action execution valve includes a shift pressure valve and a shift flow valve; It also includes detecting whether the shift pressure valve and the shift flow valve have a stuck fault; Detecting whether the shift pressure valve and the shift flow valve have a stuck fault specifically includes: For the shift pressure valve, the sticking fault is specifically that the shift pressure valve outputs an unexpectedly high pressure when it is closed or slightly opened.

2. The dual clutch transmission shift solenoid valve stuck diagnosis method according to claim 1, characterized in that: The shift solenoid valve is a multi-way valve, and the method for diagnosing the stuck state of the multi-way valve specifically includes: According to the target gear position and the current gearbox structure, the control unit identifies and calculates the current unexpected gear position of the multi-way valve; During the target shift control process, judging whether the current multi-way valve has a stuck fault according to whether the multi-way valve control state and the multi-way valve stuck state are opposite; Detect whether the unexpected shift fork has moved and determine whether the current multi-way valve has a stuck fault; Determine the output multi-way valve stuck fault type and implement corresponding fault handling strategies according to different fault types.

3. The dual clutch transmission shift solenoid valve stuck diagnosis method according to claim 2, characterized in that: The method of judging whether a stuck fault occurs in the current multi-way valve according to whether the multi-way valve control state and the stuck state of the multi-way valve are opposite is specifically as follows: The state of the target gear control multi-way valve is ON, the multi-way valve is stuck in the OFF position, or: The state of the target gear control multi-way valve is OFF, and the multi-way valve is stuck in the ON position; The detecting whether the unexpected shift fork is actuated is specifically: detecting whether the unexpected shift fork is actuated when the multi-way valve is switched to the target position; if the unexpected shift fork is actuated, it is determined that a jamming fault exists in the current multi-way valve.

4. The dual clutch transmission shift solenoid valve stuck diagnosis method according to claim 1, characterized in that: include: Detecting whether the shift pressure valve and the shift flow valve have a stuck fault; Determine the stuck fault type of the output shift action execution valve, wherein the stuck fault type is specifically stuck in the ON state or the OFF state; During the process of shifting gears, the actual shift fork position is monitored in real time; The decision outputs the stuck fault type of the shift action actuator valve, and implements the corresponding fault handling strategy according to the stuck fault type.

5. The dual clutch transmission shift solenoid valve stuck diagnosis method according to claim 4, characterized in that: Detecting whether the shift pressure valve and the shift flow valve have a stuck fault specifically includes: For the shift pressure valve, the sticking fault is that the shift pressure valve outputs unexpectedly high pressure when it is closed or slightly opened; For the shift flow valve, the specific jamming fault is: When the target gear position controls the shift flow valve to output forward flow, the shift flow valve is stuck at the position of outputting reverse flow; When the target gear position controls the shift flow valve to output reverse flow, the shift flow valve is stuck at the position of outputting forward flow; Detect whether the abnormal gear position during the gear shifting process is related to the multi-way valve. If the multi-way valve is abnormal, re-judge and replace the target gear position and the unexpected gear position; The implementation of a corresponding fault handling strategy according to the type of the stuck fault specifically includes: When the shifting solenoid valve fails, the current gear shift is decided based on the gear status on the current shift shaft to determine whether to change the current gear to the faulty gear. For some hydraulic systems that only affect single-axis shifting, the non-faulty axis is used when a single shift execution solenoid valve fails; If both axles are changed to the faulty gear and cannot be shifted again, always drive in the gear on the axle.

6. A dual clutch transmission shift solenoid valve stuck diagnosis system, characterized in that: Specifically include: A shift solenoid valve stuck fault detection condition preset module, used to detect whether the shift solenoid valve meets the preset conditions for performing stuck fault detection; A shift solenoid valve stuck fault diagnosis module is used to diagnose the stuck fault of different shift solenoid valves, detect abnormal fork movement and / or gear position abnormality during the shift process, and determine different stuck fault detection states; A shift solenoid valve stuck fault identification and analysis module is used to identify and analyze stuck faults according to different stuck fault detection states; The shift solenoid valve stuck fault solution strategy module is used to output the stuck fault detection results in real time and implement the corresponding fault solution strategy; The preset conditions for the stuck fault detection are specifically: Detect the current gearbox shifting status and type, and eliminate other faults other than the shift solenoid valve stuck fault; During the gear shifting process, the gear shifting type of the target gear shift fork is detected, and the stabilization time of the gear shift fork in neutral and in gear is determined; The shift types include neutral to gear, or gear to disengage gear; Eliminate other fault conditions other than the solenoid valve stuck fault and determine the actual shift time of the current shift execution solenoid valve; Wherein, according to determining the actual shifting time of the current shifting execution solenoid valve, it is ensured that the shifting pressure generated by the solenoid valve actually acts on the shift fork; the shifting solenoid valve specifically includes: a multi-way valve, a shifting action execution valve and a non-target gear shifting flow valve; wherein, determining whether the preset conditions for the stuck fault detection are met; If, it is satisfied, then the diagnosis of multi-way valve sticking is performed according to the current shifting state; If, it is not satisfied, the diagnosis of multi-way valve sticking will not be performed; wherein, detecting whether a non-target gear shift flow valve fault detection state satisfies a preset condition, and when the preset condition is met, detecting the type of the non-target gear shift flow valve fault detection state; The detection state of the non-target gear shift flow valve failure specifically includes: First fault detection state: the current action is to engage a gear, the unexpected shift fork is initially in neutral, the expected shift fork is moving from neutral to the target gear, the unexpected shift fork is moving from neutral to the unexpected gear, and the shift fork displacement meets the fault detection requirements; Second fault detection state: the current action is to engage a gear, the unexpected gear is in the engaged state at the beginning of the unexpected shift fork shift, the expected shift fork is moving from the neutral gear to the expected gear, the unexpected shift fork is moving from the unexpected gear to the neutral gear, and the shift fork displacement meets the fault detection requirements; The third fault detection state: the current action is shifting, the unexpected shift fork is in neutral when the shift is initially shifted, the expected shift fork is moving from the expected gear to neutral, the unexpected shift fork is moving from neutral to the unexpected gear, and the shift fork displacement meets the fault detection requirements; Fourth fault detection state: the current action is to disengage the gear, the unexpected gear position is in the engaged state at the beginning of the unexpected shift fork shift, the expected shift fork is moving from the expected gear position to the neutral gear, the unexpected shift fork is moving from the unexpected gear position to the neutral gear, and the shift fork displacement meets the fault detection requirements; According to the detection state of the non-target gear shift flow valve fault, it is determined whether the non-target gear shift flow valve has a stuck fault; When the four conditions in the first, second, third and fourth fault detection states are met at the same time, it is determined that the non-target gear shift flow valve is stuck, resulting in an unexpected gear being in neutral or having a tendency to slip out of gear; Decision output non-target gear shift flow valve stuck fault type; When a shift flow valve jam fault occurs when a gear shift is executed in a non-target gear, a corresponding fault handling strategy is executed; Wherein, the shift action execution valve includes a shift pressure valve and a shift flow valve; It also includes detecting whether the shift pressure valve and the shift flow valve have a stuck fault; Detecting whether the shift pressure valve and the shift flow valve have a stuck fault specifically includes: For the shift pressure valve, the sticking fault is specifically that the shift pressure valve outputs an unexpectedly high pressure when it is closed or slightly opened.

7. An electronic device, characterized in that: include: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the method described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: It stores a computer program executable by an electronic device, and when the computer program runs on the electronic device, the electronic device executes the steps of the method described in any one of claims 1 to 5.

9. A vehicle, characterized in that: Specifically include: An electronic device for implementing the dual clutch transmission shift solenoid valve stuck diagnosis method as claimed in any one of claims 1 to 5; a processor, the processor running a program, and when the program is running, executing the steps of the dual clutch transmission shift solenoid valve stuck diagnosis method according to any one of claims 1 to 5 for data output from the electronic device; A storage medium for storing a program, wherein when the program is run, the program executes the steps of the dual clutch transmission shift solenoid valve sticking diagnosis method according to any one of claims 1 to 5 for data output from an electronic device.

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