CN109296747B - Failure solution method and system for electronic gear shifter - Google Patents
Failure solution method and system for electronic gear shifter Download PDFInfo
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- CN109296747B CN109296747B CN201811309276.2A CN201811309276A CN109296747B CN 109296747 B CN109296747 B CN 109296747B CN 201811309276 A CN201811309276 A CN 201811309276A CN 109296747 B CN109296747 B CN 109296747B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
- F16H2061/326—Actuators for range selection, i.e. actuators for controlling the range selector or the manual range valve in the transmission
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to a method and a system for solving the failure of an electronic gear shifter, wherein the system is a software system installed on an electronic gear shifter MCU and comprises a whole vehicle driving information input module, a key input module, a gear position sensing input module, a vehicle current gear signal receiving module, a whole vehicle signal receiving module, a gear shifting request logic module, a fault diagnosis module, a control signal output module, a gear shifting request signal output module, a fault diagnosis information output module, a fault mode identification module, a fault mode gear shifting request module, a fault mode exit module and a gear shifting request signal output module. According to the invention, the switching-in and the switching-off of the failure mode can be set under the condition that the electronic gear shifter fails, so that the transmission of a gear shifting position signal under the failure mode of the electronic gear shifter is realized, and a failed vehicle can still shift gears and run without anchoring or towing.
Description
Technical Field
The invention belongs to the technical field of electronic gear shifting, relates to electronic gear shifting of vehicles, and particularly relates to a method and a system for solving failure of an electronic gear shifter.
Background
Along with the development of new energy automobiles and intelligent driving automobiles and the electronic development of a traditional power vehicle gear shifting and speed changing control system, more and more vehicles use electronic gear shifters. The electronic gear shifter generally has a plurality of forms such as a gear lever type, a knob type, a key type, a toggle type, a hand-held type and the like, and has the main functions of receiving the gear shifting requirement of a driver, converting the gear shifting action of the driver into electric signals through a position sensor/switch (hereinafter, collectively referred to as a position sensor) and the like, receiving the electric signals by a main control single chip Microcomputer (MCU) of the electronic gear shifter, identifying the electric signals into different gear shifting position signals according to set logic, coding the different gear shifting position signals, and outputting the different gear shifting position signals to a vehicle control unit, an electric appliance control gearbox TCU and a motor controller (hereinafter, referred to as a variable speed TCU) through a CAN network or a hard wire for processing and execution to realize the gear shifting operation.
The electronic gear shifter is an electromechanical integrated product, and the possible faults of the electronic gear shifter mainly have two aspects: mechanical faults and electrical faults. The mechanical failure mainly refers to a mechanical structure with gear shifting operation in the electronic gear shifter, and in the operation process of a driver, the mechanical structure, materials and the like of the electronic gear shifter are subjected to factors such as falling, breaking, damage, clamping stagnation, failure, extreme temperature failure, durability deterioration and the like in the use process of a real vehicle, so that part or all gears cannot be subjected to gear shifting operation, part or all gear positions are subjected to induction failure, and keys are subjected to failure; the electrical appliance faults mainly come from the fact that functions of partial or all gear position sensors or keys of the electronic gear shifter fail to work, and gear shifting positions required by a driver cannot be sensed, so that the electronic gear shifter fails in gear shifting function, cannot send gear shifting request signals, fails in gear shifting function, and cannot normally run.
The mechanical faults are not completely avoided by a good method at present, and the electrical faults are generally designed in a redundancy mode according to the requirements of ISO26262 road vehicle function safety and the like. According to the function definition of the electronic gear shifter, the electrical redundancy design of the electronic gear shifter generally selects one position to adopt a plurality of position sensors and the like to improve the reliability of the electronic gear shifting function. This undoubtedly leads to a direct increase in the cost of the product and complicates the hardware and software architecture of the electronic gear shifter. At the same time, these redundancies only reduce the associated risks to a certain extent and cannot completely circumvent the shift failure of the electronic gear shifter. For example, in an existing electronic gear shifter, hall-magnet steel is mostly used as a position sensing scheme, and a plurality of position sensors (such as hall sensors) are used in one position to realize redundancy, so that the risk of failure of individual sensors in the position can be reduced, but if a trigger element (such as magnet steel) of each sensor fails, the number of hall sensors arranged in one gear is more, and if the magnet steel fails, is separated, is stuck in gear shifting, and the like, the position sensing fails, so that the gear shifting fails.
When the electronic gear shifter works, a driver operates a mechanical structure of the gear shifter, the mechanical structure drives the sensing/triggering device to sense the position sensor at the corresponding position, and transmits a position sensing signal or a key signal at the position to the electronic gear shifter MCU, and the electronic gear shifter MCU combines information such as a current running signal and gear shifting logic of the whole vehicle and outputs a gear shifting request signal to the whole vehicle/speed change TCU according to a set format. Once the electronic gear shifter has a mechanical fault or an electrical fault or a key fault of the position sensor, the electronic gear shifter MCU cannot normally receive a corresponding gear shifting position signal or a key signal, and thus cannot send a required gear shifting request signal, resulting in a fault of the electronic gear shifter.
Disclosure of Invention
In order to solve the problems that once the existing electronic gear shifter fails, a gear shifting request signal cannot be sent, partial or all gear shifting functions fail, and a vehicle cannot normally run and the like, the invention provides a failure solution method and a system for the electronic gear shifter, which can set the switching-in and the switching-off of a failure mode under the condition that the electronic gear shifter fails, realize the transmission of a gear shifting position signal under the failure mode of the electronic gear shifter, and ensure that the failed vehicle can still run in a gear shifting mode without being anchored and pulled.
The invention is realized by the following technical scheme:
the failure solving method of the electronic gear shifter is characterized in that an additional failure mode cut-in function is defined for existing functional keys or a gear shifter position sensor on the electronic gear shifter, a driver operation instruction is written in, the driver is informed, failure mode triggering conditions are set, once the conditions are met, the electronic gear shifter can be triggered to enter a failure mode, if the gear shifter position sensor fails, the electronic gear shifter MCU enters the failure mode through the keys, the electronic gear shifter MCU is set to operate in the failure mode, the electronic gear shifter MCU does not need to process gear shifter position sensor signals any more, gear shifting requests are directly simulated and output by the electronic gear shifter MCU, once the failure mode is triggered, the electronic gear shifter MCU neglects signal input except the failure mode keys, directly starts built-in gear shifting logic, circularly outputs gear shifting request signals built in the electronic gear shifter MCU and displays the gear shifting request signals on a vehicle instrument or a gear display panel, and releasing the fault mode cut-in key until the gear shifting required by the driver is switched, and sending a gear shifting request signal of the current gear by the electronic gear shifter MCU to realize the gear shifting function in the fault mode.
The electronic shifter failure solution, wherein: the setting of the mode cut-in function comprises a fault mode key/gear setting, a fault mode cut-in setting and a fault mode removing setting; the failure mode key/gear setting is to set a key/gear with low failure probability in the electronic gear shifter as a failure mode key/gear, and comprises a single failure mode cut-in key/gear or two or more failure mode cut-in keys/gears; the failure mode cut-in setting means that the entering condition of the failure mode is to avoid the normal operation of the failure mode key/gear and the misoperation operation in driving; the failure mode release setting means that the pressing of the failure mode cut-in key/gear or the combination of the failure mode cut-in key/gear is released, i.e. the failure mode is released.
The electronic shifter failure solution, wherein: the failure mode key/gear setting is to set the P key as a failure mode cut-in key or to select a front and rear non-steady state position of the monostable electronic gear shifter as a failure mode cut-in gear of the electronic gear shifter.
The electronic shifter failure solution, wherein: the fault mode key/gear setting simultaneously sets the P key and the R unlocking key as fault mode cut-in keys, or simultaneously sets the P key, the R unlocking key and other functional keys of the electronic gear shifter as fault mode cut-in keys, or simultaneously sets the P key, the R unlocking key and the non-stop gear as fault mode cut-in keys/gears, so that fault mode cut-in and function redundancy removal are realized.
The electronic shifter failure solution, wherein: the fault mode key/gear setting is to set the combination of the P key and the R unlocking key as a fault mode cut-in key, or set the combination of the P key, the R unlocking key and other functional keys of the electronic gear shifter as a fault mode cut-in key, or set the combination of the P key, the R unlocking key and the non-stop gear as a fault mode cut-in key/gear.
A failure solving system of an electronic gear shifter is a software system installed on an electronic gear shifter MCU, is based on the failure solving method of the electronic gear shifter and comprises a whole vehicle driving information input module, a key input module, a gear position sensing input module, a vehicle current gear signal receiving module, a whole vehicle signal receiving module, a gear shifting request logic module, a fault diagnosis module, a control signal output module, a gear shifting request signal output module and a fault diagnosis information output module; the system also comprises a fault mode identification module, a fault mode gear shifting request module, a fault mode exit module and a gear shifting request signal output module;
the fault mode identification module is used for monitoring the behavior of a relevant fault mode cut-in key/gear according to a preset fault mode cut-in condition and judging whether the operation is normal or a fault cut-in mode;
the fault mode gear shifting request module is used for continuously and circularly outputting a gear shifting request signal and displaying the gear shifting request signal in a flashing mode;
the fault mode exit module is used for continuously monitoring the pressing and loosening or triggering and separating of a fault mode cut-in key/gear, and exiting/removing the fault cut-in mode;
the gear shifting request signal output module is used for outputting a currently displayed gear shifting request signal, namely outputting a gear shift request signal when the fault mode exits and taking the gear shift request signal as a gear shifting request to finish the gear shifting request operation.
The electronic shifter failure resolution system, wherein: and after the gear shifting request module enters a fault mode, the fault mode gear shifting request module directly outputs gear shifting request signals continuously and circularly according to preset gears, transmits the gear shifting request signals to a gear display panel of a vehicle instrument or a gear shifter, and flickers to display gear shifting request characters.
The electronic shifter failure resolution system, wherein: the whole vehicle driving information input module is used for reading real-time gear signals, brake signals, vehicle speed signals and wheel steering signals of the current speed change TCU of the whole vehicle in whole vehicle hard wire and CAN wire communication signals received by the electronic gear shifter MCU; the gear position sensing input module is used for monitoring sensing electric signals of each gear position sensor of the gear shifter; the vehicle current gear signal receiving module is used for reading a real-time gear signal of a current speed change TCU of the whole vehicle from the received whole vehicle signal; the vehicle signal receiving module is used for receiving vehicle signals and reading information related to gear shifting conditions from the received vehicle signals; the gear shifting request logic module is used for outputting a gear shifting request after comprehensive judgment according to information preset by a client; the fault diagnosis module is a position sensor and key fault diagnosis module and is used for monitoring the health states of the position sensor and the key, and generating a fault code if a fault exists; the control signal output module is used for displaying a locking control signal and a reversing control signal, so that the electronic gear shifter MCU can control related output according to real-time gear information of the variable speed TCU; the gear shifting request signal output module is used for outputting the output of the gear shifting request logic module to a whole vehicle or a variable speed TCU according to a specified format; and the fault diagnosis information output module is used for outputting fault diagnosis information of the position sensor and the keys and reporting the diagnosis result of the fault diagnosis module to the whole vehicle or warning a driver. The key input module is a P key and R unlocking key input module and is used for monitoring whether the P key and the R unlocking key are pressed or not. The key input module is other functional key input modules on the electronic gear shifter and is used for monitoring whether other functional keys on the electronic gear shifter are pressed or not.
Has the advantages that:
the electronic gear shifter failure solving method provided by the invention is reasonable and simple in concept, can realize a mechanical gear shifting structure independent of the electronic gear shifter and does not increase a gear shifting position sensor, can set the switching-in and the switching-off of a failure mode under the condition that the electronic gear shifter has failure prompt/alarm, realizes that a gear shifting position signal is sent under the failure mode of the electronic gear shifter, and can still shift gears for running of a failed vehicle, thereby realizing no anchoring and no towing.
The electronic gear shifter failure solving system is reasonable and simple in structural design, is a system formed by newly adding a fault mode switching-in and removing identification function (namely, a fault mode identification module, a fault mode gear shifting request module, a fault mode exit module and a gear shifting request signal output module) in an electronic gear shifter MCU system of an original electronic gear shifter, does not need to add extra investment of mechanical structures and electrical elements, and can solve the problem that gear shifting cannot be carried out or gear shifting fails under the condition that gear shifting induction failure or key failure (the gear shifting induction failure and the key failure both fail at the same time) of the gear shifter; compared with the electrical appliance redundancy design, the method reduces a large amount of electrical appliance element investment and complicated software redundancy design, and the switching-in and switching-off operation of the fault mode is simple, convenient and easy to use.
Drawings
Fig. 1 is a flowchart illustrating the operation of setting the P-key as the failure mode cut-in key in the electronic shifter failure solution of the present invention;
fig. 2 is a flowchart illustrating the operation of setting the R unlock key to the failure mode cut-in key in the electronic shifter failure solution of the present invention;
fig. 3 is a flowchart illustrating the operation of setting the combination of the P key and the R unlock key as the failure mode cut-in key in the electronic shifter failure solution of the present invention;
FIG. 4 is a block diagram of the electronic shifter failure resolution system of the present invention;
FIG. 5 is a diagram illustrating an example of a shift operation of the electronic shifter under normal conditions;
FIG. 6 is a block diagram of the electrical connections of a prior art electronic shifter;
fig. 7 is a block diagram of a system configuration of an electronic shifter MCU of the conventional electronic shifter.
Detailed Description
The invention relates to a failure solving method of an electronic gear shifter, which defines an additional failure mode cut-in function for an existing function key or a gear shifter position sensor on the electronic gear shifter, writes a driver operation instruction into the driver, informs the driver, sets a failure mode triggering condition, can trigger the electronic gear shifter to enter a failure mode once the condition is met, sets that an electronic gear shifter MCU does not need to process a gear shifter position sensor signal when the electronic gear shifter operates in the failure mode, directly simulates and outputs a gear shifting request by the electronic gear shifter MCU, directly starts built-in gear shifting logic to circularly output a gear shifting request signal built in and displayed by the electronic gear shifter MCU no matter whether the electronic gear shifter has a failure or not, neglects the position sensing input of the gear shifter until the gear shifting required by the driver is switched, and releasing the fault mode cut-in key, and sending a gear shifting request signal of the current gear by the MCU of the electronic gear shifter to realize the gear shifting function in the fault mode.
The setting of the fault mode cut-in function includes a fault mode key/gear setting, a fault mode cut-in setting and a fault mode release setting.
The failure mode key setting is to set a key/gear with low failure probability in the electronic gear shifter as a failure mode key, and comprises a single failure mode cut-in key/gear or two or more failure mode cut-in keys/gears.
The single fault mode cut-in key/gear can be used for setting a P key as a fault mode cut-in key or selecting front and back unstable positions of a monostable electronic gear shifter as a fault mode cut-in gear of the electronic gear shifter; the monostable state is that the mechanical gear position of the gear shifter has only one stable state under the condition of no external force operation, and even if a plurality of gears exist, after a driver finishes gear shifting and removes gear shifting force, the gear shifter returns to the original external force-free stop position, which is generally an N gear position or a Home gear position; the manual mode M, M + and M-gear of the existing automatic gear shifter are also monostable, and the gear lever is generally stopped at the middle M position when no external force exists; existing electronic shifters, especially those with a lever, are essentially monostable; therefore, the front and rear non-steady-state positions of the monostable electronic shifter can be selected as the failure mode cut-in gear of the electronic shifter;
when two or more than two fault mode cut-in keys/gears are set, the P key and the R unlocking key can be simultaneously set as the fault mode cut-in keys/gears, or the P key, the R unlocking key and one or more than one other keys can be simultaneously set as the fault mode cut-in keys/gears, so that the fault mode cut-in and function redundancy removal are realized, once the P key fails, the R unlocking key or other keys can also enter a set fault mode in the fault mode of the gear shifter, and the gear shifting function in the fault state is realized.
The failure mode cut-in setting means that the entry condition of the failure mode is to avoid the normal operation of the failure mode key/gear and the false operation during driving.
The failure mode release setting means that the pressing of the failure mode cut-in key/gear or a combination thereof is released, i.e. represents the release of the failure mode.
The failure solving method of the electronic gear shifter is further explained by combining different setting conditions of the fault mode cut-in key and the triggering conditions thereof as follows:
(1) setting a P key as a fault mode cut-in key, detecting that the P key has a normal function and does not report an error by an electronic gear shifter MCU, judging that the original function definition of the P key is normally executed if the trigger condition of the P key is that the long press time exceeds 10 seconds and the normal press time of the P key does not exceed 2 seconds; if the P key is loosened within 2-10 seconds, the failure mode cannot be entered; if the P key is pressed for more than 10 seconds and is not released all the time, the long-time pressing signal is detected by the electronic gear shifter MCU, and the long-time pressing signal is compared with a preset trigger condition to meet the preset fault mode trigger condition for long-time pressing of the P key, so that the electronic gear shifter enters a preset fault mode; under the fault mode, the electronic gear shifter MCU does not process signals of other position sensors and keys except for a P key any more, at the moment, the signals of other position sensors and keys except for the P key are normal or abnormal or have no relation with fault, the electronic gear shifter MCU only detects the P key signal, starts to continuously and circularly output preset gear request signals such as P-R-N-D and the like, outputs the preset gear request signals to an automobile instrument and a gear panel for flicker display, and when a gear character required by a certain driver is displayed, if the fact that the driver releases and presses the P key is detected, the electronic gear shifter MCU outputs a gear shifting request signal represented by the display character to realize a gear shifting request, and simultaneously, the fact that the current fault mode is switched in is solved by releasing the P key; if the gear is shifted again, the fault mode needs to be entered again, and the long press of the P key can be completed for more than 10 seconds.
Similarly, when the R unlocking key or other functional keys of the electronic gear shifter are set as the failure mode cut-in keys, the R unlocking key or other functional keys of the electronic gear shifter can be processed by referring to the manner of setting the P key as the failure mode cut-in key, and a single key is set as the failure mode cut-in key.
(2) Setting an unsteady state gear or an unsteady state gear of the monostable electronic gear shifter as a fault mode cut-in gear; the monostable state is that the mechanical gear position of the gear shifter has only one stable state or stop position under the condition of no external force operation, other gear states belong to unstable states or non-stop positions, and even if a plurality of gears exist, after a driver finishes shifting and removes shifting force, the electronic gear shifter returns to the original non-external force stop position, which is generally an N gear position or a Home gear position or a monostable stop position; for example, the M, M +, M-gear of the manual/movement mode of the automatic gear shifter is monostable, the lever is generally stopped at the middle M position without external force, i.e., the steady position or the rest position, and the M +, M-gear belongs to the unsteady position or the non-rest position; existing electronic shifters, especially those with a lever, are essentially monostable; the forward/rear non-steady state position of the monostable electronic shifter can thus be selected as the failure mode cut-in gear of the electronic shifter; nowadays more and more electronic gear shifters are in monostable form, which is a developing need for intelligent driving and even unmanned driving.
The conventional monostable electronic gear shifter is generally provided with three gears R/N/D, wherein the gear N is a steady-state gear, the monostable electronic gear shifter stays at the gear N when no external force exists, and the gear R and the gear D are unstable gear positions; the R gear is set to be a fault mode cut-in gear, the R gear position sensor is normal, the electronic gear shifting unit MCU has no error information, the time length of 10 seconds can be set as a fault mode trigger condition for engaging the R gear, when the R gear is shifted at ordinary times, as long as the R gear is set to be not more than 10 seconds, the electronic gear shifting unit MCU is considered to be a normal function of the R gear, once the sensing signal of the R gear position sensor lasts for more than 10 seconds, the electronic gear shifting unit MCU enters a fault mode, at the moment, the electronic gear shifting unit MCU only receives the signal of the R gear position sensor, ignores other position sensor signals and key signals, directly presses built-in gear shifting logic whether the signals are faulty or not, continuously and circularly outputs P-R-N-D and other gear shifting request signals, and flickers corresponding gear characters on a vehicle instrument and a gear shifting panel until required gear shifting characters are displayed, releasing the R gear, returning the monostable electronic gear shifter to the steady state position of the monostable electronic gear shifter, enabling the R gear position sensor to be disengaged from sensing, outputting a gear shifting request of a currently displayed gear character by the monostable electronic gear shifter, realizing a gear shifting function, and simultaneously removing the switching-in function of the fault mode; when the gear needs to be shifted again, the fault mode can be entered again, and the long-time R gear is only needed to be shifted for more than 10 seconds and is not released.
(3) Simultaneously setting a plurality of keys/gears as fault mode cut-in keys to realize the redundancy of the function of entering the fault mode; for example, a P key and an R unlocking key or other functional keys are set as fault mode cut-in keys, and unsteady-state gears such as an R gear or a D gear are set as fault mode cut-in gears, so that the problem that when the gear shifting sensor is in fault, a key can enter a fault mode can be solved; or when a certain key fails and other keys are normal, other keys can enter a failure mode to realize the gear shifting function; or all keys are in fault, and the unsteady gear can enter a fault mode to realize the gear shifting function and the like.
(4) Setting a plurality of key combinations or key and gear combinations as fault mode cut-in keys/gears; for example, a combination of a P key and an R unlocking key is set as a fault mode cut-in key, or a combination of the P key and the R unlocking key and other functional keys or non-stop gears of the electronic gear shifter is set as a fault mode cut-in key/gear, only when the P key and the R unlocking key are pressed simultaneously, or only the P key and the R unlocking key and other functional keys or non-stop gears of the electronic gear shifter are pressed simultaneously, and the pressing duration meets the fault mode triggering condition, the fault mode can be entered, the fault mode can be released by loosening any one or two keys in the combination of the P key and the R unlocking key, or the fault mode can be released by loosening any one or more keys in the combination of the P key and the R unlocking key and other functional keys or non-stop gears of the electronic gear shifter, and the combination mode can further reduce the operation misoperation risk, the safety of the fault mode entry is improved.
Generally, even if the electronic gear shifter does not have a gear shifting function failure, a failure function key/gear can be triggered to enter a failure mode to realize gear shifting operation, but the gear shifting operation is not recommended. The method provided by the invention is preferably applied to the use when the electronic gear shifter fails, and can realize no anchoring and no trailer and ensure that the vehicle can safely drive to a service station for maintenance. The failure solving method of the electronic gear shifter is not suitable for the scenes that the MCU of the electronic gear shifter is damaged and all the preset failure mode keys are damaged; the problem of similar faults can be solved, and when the faults occur, such as whether the gear sensor is normally arranged in the MCU, gear shifting time detection, key function detection, key time detection and the like, the fault mode is set to realize key/gear setting.
The electronic gear shifter failure solving method is further explained by combining the gear shifting working example of the electronic gear shifter:
as shown in fig. 1, the P key is set as a failure mode cut-in key, and the P key function defined by the P key is defined as the P key function defined by the P key when the P key is pressed for less than 2 seconds; if the P key is pressed for 10 seconds, the fault mode is not entered, and the fault mode is written into the operation instruction of the driver; when the fault occurs, a driver can enable the electronic gear shifter to enter a fault mode by pressing the P key for 10 seconds for a long time without loosening, under the fault mode, the electronic gear shifter MCU automatically and circularly simulates and outputs R-N-D gear signals, and each gear lasts for 2 seconds and is continuously output; because the automobile instrument or the gear panel is provided with the gear display, when the gear needing to be switched is displayed, the P button is released, the fault mode is removed, the electronic gear shifter MCU outputs the gear shifting request signal of the gear, the gear shifting function is realized, and the problem that the electronic gear shifter cannot be shifted when the electronic gear shifter is in fault is solved.
As shown in fig. 3, a combination of the P key and the R unlock key is set as an example of the failure mode cut-in key; when the fault mode needs to be entered, the two keys are pressed simultaneously and kept not to be placed until the key is triggered to enter the fault mode, and the gear shifting operation under the fault mode is realized. Similarly, if the electronic gear shifter MCU detects a failure of a P key or an R unlock key, and the gear sensor is normal, and the electronic gear shifter MCU does not detect a failure of the R or D gear position sensor, the R or D gear may be used as a fault mode cut-in gear to enter a fault mode, as shown in fig. 2, so as to implement a gear shifting function in the fault mode.
The failure solving method of the electronic gear shifter can solve most similar failure problems, whether a gear sensor is normal or not, gear shifting time detection, whether key functions are normal or not, key pressing time detection and the like can be built in an MCU of the electronic gear shifter, when the gear shifting failure and key failure failures occur, the problem can be solved by setting a failure mode key/gear, and the gear shifting under the failure mode can be realized as long as all preset failure mode cut-in keys/gears are not damaged.
As shown in fig. 4, the electronic shifter failure solving system of the present invention is a software system installed on an electronic shifter MCU, and is based on the electronic shifter failure solving method and includes a vehicle driving information input module 1, a key input module 2, a gear position sensing input module 3, a vehicle current gear signal receiving module 4, a vehicle signal receiving module 5, a shift request logic module 6, a fault diagnosis module 7, a control signal output module 8, a shift request signal output module 9, a fault diagnosis information output module 10, a fault mode identification module 11, a fault mode shift request module 12, a fault mode exit module 13, and a shift request signal output module 14.
The whole vehicle driving information input module 1 is used for reading relevant information such as real-time gear signals, brake signals, vehicle speed signals, wheel steering signals and the like of a current speed change TCU of the whole vehicle in whole vehicle hard wire and CAN wire communication signals received by the electronic gear shifter MCU.
The key input module 2 is a P key and an R unlock key or other functional key input modules on the electronic gear shifter, and is used for monitoring whether the P key and the R unlock key or other functional keys on the electronic gear shifter are pressed or not.
The gear position sensing input module 3 is a gear position sensing input module of R, N, d.
The vehicle current gear signal receiving module 4 is used for reading a real-time gear signal of a vehicle current speed change TCU from the received vehicle signal.
The vehicle signal receiving module 5 is used for receiving vehicle signals such as a brake signal, a vehicle speed, a wheel direction and the like, and reading relevant information of gear shifting conditions such as the brake signal, the vehicle speed signal, the wheel steering signal and the like from the received vehicle signals.
The gear shifting request logic module 6 is used for outputting a gear shifting request after comprehensive judgment according to safety, vehicle running information, gear position sensor sensing combination and other information preset by a client.
The fault diagnosis module 7 is a position sensor and key fault diagnosis module, and is used for monitoring the health state of the position sensor and the key, and generating a fault code if a fault exists
The control signal output module 8 is used for displaying locking control signals such as an output module and an electromagnetic valve and backing control signals, and is convenient for the electronic gear shifter MCU to control related output according to real-time gear information of the variable speed TCU.
The shift request signal output module 9 is an P, R, N, d.
The fault diagnosis information output module 10 is used for outputting fault diagnosis information of the position sensor and the key, and reporting the diagnosis result of the fault diagnosis module 7 to the whole vehicle or warning a driver.
The fault mode identification module 11 is configured to monitor a behavior of a relevant fault mode cut-in key/gear according to a preset fault mode cut-in condition, and make a judgment on whether the operation is normal or the fault cut-in mode.
The failure mode shift request module 12 is configured to output a shift request signal in a continuous cycle and to flash; when the gear shifting request module 12 enters the failure mode, the gear shifting request module directly outputs gear shifting request signals continuously and circularly according to preset gears such as R-N-D and the like, transmits the gear shifting request signals to a vehicle instrument and/or a gear shifting display panel of a gear shifter, and flickers and displays gear shifting request gear characters.
The fault mode exit module 13 is configured to release the fault cut-in mode, continuously monitor the pressing and releasing or triggering and disengaging of the fault mode cut-in key/gear, exit/release the fault cut-in mode, and stop flashing the flashing gear character.
The shift request signal output module 14 is configured to output a currently displayed shift request signal, that is, a shift request signal when the failure mode exits is output and the shift request signal is used as a shift request to complete a shift request operation.
The electronic shifter failure resolution system of the present invention is further described below in conjunction with specific embodiments:
the electronic gear shifter is generally provided with an R, N, D gear or R, N, D gear shifting position signal, a P key and an R unlocking key; under normal conditions, the work of shifting shows for example as shown in fig. 5, when the electronic gear shifter trouble of shifting gears, can't realize R, N, D and shift gears, the vehicle can not go, or mechanical failure such as drop, fracture, damage, jamming etc. inefficacy leads to unable trouble of shifting gears, the driver can directly perceivedly discover the fault cause, electrical apparatus reason can be detected by electronic gear shifter MCU like keeping off the position inductor and losing efficacy, and send out wrong information and remind for the vehicle instrument, the P button or R unblock button are normal, electron gear shifter MCU does not report the mistake promptly.
The electronic gear shifter has reasonable and simple conception, can realize that the electronic gear shifter sends gear shifting position signals and realizes the switching-in and the switching-off of a failure mode under the conditions of not depending on a mechanical gear shifting structure of the electronic gear shifter and not increasing a gear shifting position sensor, is simple to operate, convenient and easy to use, can solve the problem that the gear shifter cannot shift gears or fails in gear shifting, meets the condition that a failed vehicle can still shift gears to run under the condition that the electronic gear shifter fails, and realizes no anchoring and no towing.
Claims (10)
1. A failure solving method of an electronic gear shifter comprises the steps of defining an additional failure mode cut-in function for existing function keys or a gear shifter position sensor on the electronic gear shifter, writing a driver operation instruction into the additional failure mode cut-in function, informing a driver, setting a failure mode triggering condition, triggering the electronic gear shifter to enter a failure mode once the condition is met, entering the failure mode by the keys if the gear shifter position sensor fails, setting the electronic gear shifter to operate in the failure mode, enabling an electronic gear shifter MCU to simulate and output a gear shifting request directly by the electronic gear shifter MCU without processing a gear shifter position sensor signal, once the failure mode is triggered, neglecting signal input except the failure mode keys by the electronic gear shifter MCU, directly enabling a built-in gear shifting logic, circularly outputting the gear shifting request signal built in the electronic gear shifter MCU and displaying the gear shifting request signal on a vehicle instrument or a gear display panel, and releasing the fault mode cut-in key until the gear shifting required by the driver is switched, and sending a gear shifting request signal of the current gear by the electronic gear shifter MCU to realize the gear shifting function in the fault mode.
2. The electronic shifter failure resolution method of claim 1, wherein: the setting of the mode cut-in function comprises a fault mode key/gear setting, a fault mode cut-in setting and a fault mode removing setting;
the failure mode key/gear setting is to set a key/gear with low failure probability in the electronic gear shifter as a failure mode key/gear, and comprises a single failure mode cut-in key/gear or two or more failure mode cut-in keys/gears;
the failure mode cut-in setting means that the entering condition of the failure mode is to avoid the normal operation of the failure mode key/gear and the misoperation operation in driving;
the failure mode release setting means that the pressing of the failure mode cut-in key/gear or the combination of the failure mode cut-in key/gear is released, i.e. the failure mode is released.
3. The electronic shifter failure resolution method of claim 2, wherein: the failure mode key/gear setting is to set the P key as a failure mode cut-in key or to select a front and rear non-steady state position of the monostable electronic gear shifter as a failure mode cut-in gear of the electronic gear shifter.
4. The electronic shifter failure resolution method of claim 2, wherein: the fault mode key/gear setting simultaneously sets the P key and the R unlocking key as fault mode cut-in keys, or simultaneously sets the P key, the R unlocking key and other functional keys of the electronic gear shifter as fault mode cut-in keys, or simultaneously sets the P key, the R unlocking key and the non-stop gear as fault mode cut-in keys/gears, so that fault mode cut-in and function redundancy removal are realized.
5. The electronic shifter failure resolution method of claim 2, wherein: the fault mode key/gear setting is to set the combination of the P key and the R unlocking key as a fault mode cut-in key, or set the combination of the P key, the R unlocking key and other functional keys of the electronic gear shifter as a fault mode cut-in key, or set the combination of the P key, the R unlocking key and the non-stop gear as a fault mode cut-in key/gear.
6. An electronic shifter failure solving system is a software system installed on an electronic shifter MCU, is based on the electronic shifter failure solving method of any one of the claims 1 to 5 and comprises a vehicle driving information input module, a key input module, a gear position sensing input module, a vehicle current gear signal receiving module, a vehicle signal receiving module, a gear shifting request logic module, a fault diagnosis module, a control signal output module, a gear shifting request signal output module and a fault diagnosis information output module; the method is characterized in that: the system also comprises a fault mode identification module, a fault mode gear shifting request module, a fault mode exit module and a gear shifting request signal output module;
the fault mode identification module is used for monitoring the behavior of a relevant fault mode cut-in key/gear according to a preset fault mode cut-in condition and judging whether the operation is normal or a fault cut-in mode;
the fault mode gear shifting request module is used for continuously and circularly outputting a gear shifting request signal and displaying the gear shifting request signal in a flashing mode;
the fault mode exit module is used for continuously monitoring the pressing and loosening or triggering and separating of a fault mode cut-in key/gear, and exiting/removing the fault cut-in mode;
the gear shifting request signal output module is used for outputting a currently displayed gear shifting request signal, namely outputting a gear shift request signal when the fault mode exits and taking the gear shift request signal as a gear shifting request to finish the gear shifting request operation.
7. An electronic shifter failure resolution system as set forth in claim 6 wherein: and after the gear shifting request module enters a fault mode, the fault mode gear shifting request module directly outputs gear shifting request signals continuously and circularly according to preset gears, transmits the gear shifting request signals to a gear display panel of a vehicle instrument or a gear shifter, and flickers to display gear shifting request characters.
8. An electronic shifter failure resolution system as set forth in claim 6 wherein: the whole vehicle driving information input module is used for reading real-time gear signals, brake signals, vehicle speed signals and wheel steering signals of the current speed change TCU of the whole vehicle in whole vehicle hard wire and CAN wire communication signals received by the electronic gear shifter MCU;
the gear position sensing input module is used for monitoring sensing electric signals of each gear position sensor of the gear shifter;
the vehicle current gear signal receiving module is used for reading a real-time gear signal of a current speed change TCU of the whole vehicle from the received whole vehicle signal;
the vehicle signal receiving module is used for receiving vehicle signals and reading information related to gear shifting conditions from the received vehicle signals;
the gear shifting request logic module is used for outputting a gear shifting request after comprehensive judgment according to information preset by a client;
the fault diagnosis module is a position sensor and key fault diagnosis module and is used for monitoring the health states of the position sensor and the key, and generating a fault code if a fault exists;
the control signal output module is used for displaying a locking control signal and a reversing control signal, so that the electronic gear shifter MCU can control related output according to real-time gear information of the variable speed TCU;
the gear shifting request signal output module is used for outputting the output of the gear shifting request logic module to a whole vehicle or a variable speed TCU according to a specified format;
and the fault diagnosis information output module is used for outputting fault diagnosis information of the position sensor and the keys and reporting the diagnosis result of the fault diagnosis module to the whole vehicle or warning a driver.
9. An electronic shifter failure resolution system as set forth in claim 8 wherein: the key input module is a P key and R unlocking key input module and is used for monitoring whether the P key and the R unlocking key are pressed or not.
10. An electronic shifter failure resolution system as set forth in claim 8 wherein: the key input module is other functional key input modules on the electronic gear shifter and is used for monitoring whether other functional keys on the electronic gear shifter are pressed or not.
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| CN111379852B (en) * | 2019-06-17 | 2021-07-13 | 长城汽车股份有限公司 | Gear determining method and system and vehicle |
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| CN105065661A (en) * | 2015-07-20 | 2015-11-18 | 中国重汽集团济南动力有限公司 | Gear recommending method for automated mechanical transmission (AMT) vehicle in manual mode |
| DE102015217648A1 (en) * | 2015-09-15 | 2017-03-16 | Zf Friedrichshafen Ag | Device for controlling an automatically shifting transmission |
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