CN108204453B - The control method of transmission reverse gear lock position learning functionality - Google Patents
The control method of transmission reverse gear lock position learning functionality Download PDFInfo
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- CN108204453B CN108204453B CN201810010165.5A CN201810010165A CN108204453B CN 108204453 B CN108204453 B CN 108204453B CN 201810010165 A CN201810010165 A CN 201810010165A CN 108204453 B CN108204453 B CN 108204453B
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- Prior art keywords
- speed changer
- reverse gear
- shift
- selecting
- transmission reverse
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Classifications
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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
- F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
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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
- F16H61/18—Preventing unintentional or unsafe shift, e.g. preventing manual shift from highest gear to reverse gear
- F16H2061/185—Means, e.g. catches or interlocks, for preventing unintended shift into reverse gear
Abstract
The present invention discloses a kind of control method of transmission reverse gear lock position learning functionality, start transmission reverse gear lock position learning functionality first, judge whether to meet transmission reverse gear lock position condition for study, if meeting condition, clutch separation, shift-selecting and changing actuating mechanism is moved to speed changer 1, 2 neutral gears, shift-selecting and changing actuating mechanism is moved to speed changer 5R bit selecting track, shift-selecting and changing actuating mechanism is linked into the gear of speed changer 5, it keeps off from speed changer 5 to direction of reversing gear and slowly moving, record current gearshift position sensor value, obtain transmission reverse gear lock position original value Px, it updates transmission reverse gear and locks physical location P, transmission reverse gear lock physical location P is saved in nonvolatile memory.The reversing gear for speed changer that invention obtains current vehicle locks physical location, guarantees to reserve safe clearance, reduces the shock locked to transmission reverse gear, prolong the service life.
Description
Technical field
The present invention relates to field of automobile electronic control, and in particular to a kind of control of transmission reverse gear lock position learning functionality
Method.
Background technique
AMT is to have installed shift-selecting and changing actuating mechanism additional on the basis of original manual transmission with clutch actuating mechanism to replace
Clutch pedal, the shifting handle of manual operation.When high vehicle speeds, since 5 gears are hung in driver's maloperation
To reversing gear, it will lead to transmission failure and jeopardize the safety of driver and passenger, in order to prevent this situation, being filled on manual transmission
Reverse gear lock.Although AMT is TCU(Transmission Control Unit, i.e. automatic gear-box control unit, commonly use
In automatic transmission such as AMT, AT, DCT, CVT, it is simpler to realize that automatic shift control makes to drive) it automatically controls, prevent from software
Only high vehicle speeds are mistakenly linked to and reverse gear from the gear of speed changer 5, but software is not to be perfectly safe and reliably, therefore, in AMT
With the lock that reverses gear is equipped on manual transmission, reverse gear from machinery to prevent 5 gears to be mistakenly linked to.
Due to being influenced by factors such as vehicle-state, road environments, keeping off from speed changer 5, which may also occur, in AMT falls back on neutral gear
System overshoot is caused to strike transmission reverse gear lock, and transmission reverse gear lock has projected life, if hitting number can excessively damage
Bad transmission reverse gear lock, therefore fall back on neutral gear from the gear of speed changer 5 in order to prevent and do not strike against to transmission reverse gear and lock, extend the lock that reverses gear
Service life, AMT system needs to know transmission reverse gear lock position, and reserves safe clearance.But because of AMT mechanical automatic speed-changing
The machine-building of device has error with electrical, and there are errors for transmission assembly assembly, and the transmission reverse gear of every trolley is caused to be locked
Position is variant, so needing to reaffirm the AMT system transmission reverse gear lock physical location of every trolley, to guarantee vehicle
Safety and transmission reliability.
Summary of the invention
The purpose of the invention is to overcome the deficiencies of the prior art and provide a kind of transmission reverse gear lock position learning functionality
Control method, obtain the transmission reverse gear lock physical location of current vehicle, reserve safe clearance, reduce and transmission reverse gear is locked
Shock, extend transmission reverse gear lock service life, be suitable for the electric-controlled mechanical automatic gear-box AMT and automatically controlled DCT of dry type.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of control method of transmission reverse gear lock position learning functionality, it is characterised in that: the following steps are included:
Step 1), starting transmission reverse gear lock position learning functionality；
Step 2 judges whether to meet transmission reverse gear lock position condition for study, enters step 3 if met, otherwise move back
Study failure out；
Step 3), shift-selecting and changing actuating mechanism are moved to 12 neutral gears of speed changer, judge whether shift-selecting and changing actuating mechanism succeeds
12 neutral gears of speed changer are reached, if it is successful, entering step 4), otherwise exit study failure；
Step 4), shift-selecting and changing actuating mechanism are moved to 5R neutral gears of speed changer, whether judge shift-selecting and changing actuating mechanism movement
5R neutral gears of speed changer are successfully arrived at, if it is successful, entering step 5), otherwise exit study failure；
Step 5), shift-selecting and changing actuating mechanism are linked into the gear of speed changer 5, judge whether shift-selecting and changing actuating mechanism is successfully linked into speed change
Device 5 is kept off, if it is successful, entering step 6), otherwise exits study failure；
Step 6) is kept off from speed changer 5 to direction movement of reversing gear, and judges that speed changer 5 is kept off to whether direction movement of reversing gear succeeds,
If it is successful, entering step 7), study failure is otherwise exited；
Step 7) records current gearshift position sensor value, obtains transmission reverse gear lock position original value Px, and sentence
Whether within the set range transmission reverse gear lock position original value Px break, if entering step 8), otherwise exiting in setting range
Study failure；
Step 8) repeats step 3) to step 7) at least twice, and it is former to obtain at least three transmission reverse gear lock positions
Initial value P1, P2, P3, average Pavg；
Transmission reverse gear lock position average value P avg is compared by step 9) with setting range, judges whether setting
In range, if within the set range, transmission reverse gear lock position average value, that is, transmission reverse gear locks physical location P, updates and become
Fast device, which reverses gear, locks physical location P, and transmission reverse gear lock physical location P is saved in nonvolatile memory, otherwise exits
Practise failure.
Transmission reverse gear lock position condition for study includes: that key powers on, parking brake pull-up or service brake are stepped in the step 2
Under, engine stop, clutch actuating motor there is no failure, clutch position sensor there is no failure, block selecting actuating motor not to have
Faulty, block selecting position sensor does not have failure, shift motor not to have failure, gearshift position sensor not to have failure, vehicle quiet
Only；If meeting all condition for study of transmission reverse gear lock position to enter step 3), study failure is otherwise exited.
Need for handle to be placed in the position neutral gear N before the step 1) starting transmission reverse gear lock position study.
The step 3) shift-selecting and changing actuating mechanism is moved to before 12 neutral gears of speed changer, separate clutch, and judge from
Whether clutch separates success, if clutch separation success, shift-selecting and changing actuating mechanism are moved to 12 neutral gears of speed changer, otherwise move back
Study failure out.
It is described judge clutch whether separate successfully be according to clutch whether at the appointed time clutch position sense
Device value reaches in the separating ranges of setting and is kept for a period of time, if clutch position sensor value reaches before the deadline
It in the separating ranges of setting and is kept for a period of time, then clutch separation success.
Judging whether shift-selecting and changing actuating mechanism successfully arrives at 12 neutral gears of speed changer in the step 4) is according to shifting
Before the deadline whether gearshift position sensor value and bit selecting position sensor value reach 12 neutral gear positions for executing agency
In range and kept for a period of time, if before the deadline, gearshift position sensor value and bit selecting position sensor value reach
It within the scope of to 12 neutral gear positions and is kept for a period of time, is then moved to 12 neutral gear successes of speed changer.
Judging whether shift-selecting and changing actuating mechanism movement successfully arrives at 5R neutral gears of speed changer in the step 4) is according to choosing
Before the deadline whether gearshift position sensor value and bit selecting position sensor value reach 5R neutral gears to gear shifting actuating mechanism
In position range and kept for a period of time, if before the deadline, gearshift position sensor value and bit selecting position sensor
Value reaches within the scope of 5R neutral gear positions and is kept for a period of time, then is moved to 5R neutral gear successes of speed changer.
Step 5) judgement be linked into the gear of speed changer 5 whether be successfully according to shift-selecting and changing actuating mechanism whether when defined
Interior gearshift position sensor value reaches in 5 gear position ranges and is kept for a period of time, if before the deadline, position of shifting gears
It sets sensor values to reach in 5 gear position ranges and kept for a period of time, be kept off successfully then being linked into speed changer 5.
Judge in the step 6) speed changer 5 keep off to direction of reversing gear it is mobile whether be successfully according to before the deadline,
Whether shift actuating motor stall, shift actuating motor locked rotor current are greater than setting value and until gearshift position sensor in program
Value does not change, and is kept for a period of time, if shift actuating motor locked rotor current is greater than in program before the deadline
Setting value and gearshift position sensor value does not change, and kept for a period of time, then speed changer 5 keep off it is mobile to direction of reversing gear
Success.
The step 6) is used to keep off from speed changer 5 to direction of reversing gear and slowly be moved, and the speed changer 5 keeps off slow to direction of reversing gear
Slow movement is to control shift motor movement speed according to shift motor duty ratio size to realize.
Beneficial effects of the present invention: control method of the present invention passes sequentially through starting transmission reverse gear lock position learning functionality,
And judge whether to meet transmission reverse gear lock position condition for study, if meeting condition for study, shift-selecting and changing actuating mechanism is moved to change
12 neutral gears of fast device, shift-selecting and changing actuating mechanism are moved to 5R neutral gears of speed changer, are linked into the gear of speed changer 5, shift-selecting and changing actuating mechanism
It keeps off from speed changer 5 to direction movement of reversing gear, records current gearshift position sensor value, it is former to obtain transmission reverse gear lock position
Initial value Px(x=1,2 or 3) repeat step 4) to step 7) at least twice, obtain at least three transmission reverse gear lock positions
Original value P1, P2, P3, average, and transmission reverse gear lock position average value P avg is compared with setting range, judgement
Whether within the set range, if within the set range, transmission reverse gear lock position average value, that is, transmission reverse gear locks actual bit
P is set, the method increase the accuracy of transmission reverse gear lock physical location, transmission reverse gear is updated and locks physical location P, and will become
Fast device, which reverses gear, to be locked physical location P and is saved in nonvolatile memory.The present invention is examined by the offline equipment of operation vehicle or failure
Disconnected instrument sends starting transmission reverse gear lock position to transmission control unit and learns, and using TCU control clutch actuating mechanism, becomes
Fast device shift-selecting and changing actuating mechanism movement, TCU power on rear shift-selecting and changing actuating mechanism and are located at 12 bit selecting tracks, and shift-selecting and changing actuating mechanism is wanted
5R bit selecting track is moved to from 12 bit selecting tracks, then need guarantee shift-selecting and changing actuating mechanism in 12 neutral gears, shifting is executed
Mechanism is moved to 5R neutral gears and can just go to hang the gear of speed changer 5.And since speed changer keeps off, Zhi Nengyi mobile to direction of reversing gear from 5
It moves lock position of reversing gear just not moving, this is critically important for determining lock position of reversing gear, therefore study first has to stop the beginning from 5.
Physical location is locked using the reversing gear for speed changer for obtaining current vehicle during online lower or after-sale service using the method for the present invention,
To guarantee to reserve safe clearance, reduces the shock to transmission reverse gear lock, extend service life.
The step 3) shift-selecting and changing actuating mechanism is moved to before 12 neutral gears of speed changer, clutch is separated, by clutch
It is separated to the clutch separation range of setting, because separation clutch ensure that engine connect disconnection with speed changer, to reduce
It puts into gear resistance.
The transmission reverse gear lock position condition for study includes: that key powers on, parking brake pull-up or service brake are stepped on, engine
Stop, clutch actuating motor does not have failure, clutch position sensor not to have failure, block selecting actuating motor not to have failure, choosing
Gear position sensor does not have failure, shift motor not to have failure, gearshift position sensor not to have failure, stationary vehicle, and (speed is
0), if meeting all condition for study of transmission reverse gear lock position enters step 3) clutch separation, study failure is otherwise exited.
If first separation clutch judges all conditions for meeting study again, after will having separation clutch, if discontented podolite
The all conditions of habit, then study is terminated, it will increase clutch actuation number in this way, reduce the service life of clutch.
Need for handle to be placed in the position neutral gear N before the starting transmission reverse gear lock position study.The present invention is by handle
Positioned at the position N, gear is in neutral gear, pulls on parking brake, and under inoperative engine conditions, speed changer is not transmit power, is compared
Safety.
Whether judge that speed changer 5 is kept off slowly mobile to direction of reversing gear in the step 6) is successfully according in the defined time
Interior, shift motor stall, shift motor locked rotor current whether is greater than setting value in program and gearshift position sensor value does not occur
Change, and kept for a period of time, if shift motor electric current is greater than setting value and drive range in program before the deadline
Sensor values does not change, and is kept for a period of time, slowly moves successfully then speed changer 5 is kept off to direction of reversing gear.According to changing
The electric current and clutch position for keeping off motor change to identify transmission reverse gear lock position, it is ensured that the study of transmission reverse gear lock position
Accuracy and reliability.
It keeps off from speed changer 5 into the direction moving process that reverses gear using slowly movement, movement cannot be too fast, will affect fastly very much
The accuracy of transmission reverse gear lock position study；Movement can not be too slow, will affect very much offline beat slowly and leads to shift motor
It works long hours and overheats and burn out.
Detailed description of the invention
Fig. 1 is the flow chart of 1 control method of the specific embodiment of the invention；
Fig. 2 is the circuit diagram of transmission control unit of the present invention；
Fig. 3 is the position view of AMT vehicle Five block transmission of the present invention；
Fig. 4 is the structural schematic diagram of transmission control unit TCU of the present invention；
Fig. 5 is the flow chart of 2 control method of the specific embodiment of the invention.
Specific embodiment
Invention is further described with reference to the accompanying drawing.
Specific embodiment 1:
Referring to FIG. 1 to FIG. 4, a kind of control method of transmission reverse gear lock position learning functionality, comprising the following steps:
Step 1), starting transmission reverse gear lock position learning functionality, using the offline equipment of vehicle or failure diagnostic apparatus to change
Fast device control unit TCU sends the study instruction of transmission reverse gear lock position, transmission control unit TCU receive offline equipment or
Start transmission reverse gear lock position learning program after the starting transmission reverse gear lock position study instruction that failure diagnostic apparatus is sent, into
One step, car key powers on before the starting transmission reverse gear lock position study, pulls on parking brake, and inoperative engine needs
Handle is placed in the position neutral gear N, it is ensured that speed changer is not transmit power, relatively safer in this way.
Step 2 judges whether to meet transmission reverse gear lock position condition for study, and the condition for study includes: on the key
Electricity, parking brake pull-up or service brake is stepped on, engine stop, clutch actuating motor do not have failure, clutch position sensor not to have
Faulty, block selecting actuating motor does not have failure, block selecting position sensor not to have failure, shift motor not to have failure, drive range
Sensor does not have failure, stationary vehicle (speed 0)；If meeting all condition for study of transmission reverse gear lock position to enter step
3, otherwise exit study failure.
Step 3), shift-selecting and changing actuating mechanism are moved to 12 neutral gears of speed changer, judge whether shift-selecting and changing actuating mechanism succeeds
12 neutral gears of speed changer are reached, if it is successful, entering step 4), otherwise exit study failure；Judging shift-selecting and changing actuating mechanism is
Whether before the deadline no 12 neutral gears of speed changer that successfully arrive at are according to shift-selecting and changing actuating mechanism gearshift position sensor
Value and bit selecting position sensor value reach within the scope of 12 neutral gear positions and are kept for a period of time, which is according to speed changer
And matching vehicle feature is determined by experiment, if before the deadline, gearshift position sensor value and bit selecting position pass
Sensor value reaches within the scope of 12 neutral gear positions and is kept for a period of time, then is moved to 12 neutral gear successes of speed changer；This implementation
Example in: according to shift-selecting and changing actuating mechanism whether in 2 seconds gearshift position sensor value and bit selecting position sensor value reach 12
Within the scope of neutral gear position and kept for 100 milliseconds of times judge whether success.
Step 4), shift-selecting and changing actuating mechanism are moved to 5R neutral gears of speed changer, whether judge shift-selecting and changing actuating mechanism movement
5R neutral gears of speed changer are successfully arrived at, if it is successful, entering step 5), otherwise exit study failure；Judge that shifting executes machine
It is position of whether being shifted gears before the deadline according to shift-selecting and changing actuating mechanism that whether structure movement, which successfully arrives at 5R neutral gears of speed changer,
It sets sensor values and bit selecting position sensor value reaches within the scope of 5R neutral gear positions and kept for a period of time, if defined
In time, when gearshift position sensor value and bit selecting position sensor value reach within the scope of 5R neutral gear positions and are kept for one section
Between, then it is moved to 5R neutral gear successes of speed changer.The stipulated time is 2~5 seconds, is because when shift-selecting and changing actuating mechanism executes
Between too long will lead to bit selecting motor overheating and damage.Described holding a period of time is more than or equal to 100 milliseconds, is according to speed changer
And matching vehicle feature is determined by experiment.In the present embodiment: according to shift-selecting and changing actuating mechanism whether in 2 seconds drive range
Sensor values and bit selecting position sensor value reach in 5R position ranges and are kept for 100 milliseconds of times judge whether success.
Step 5), shift-selecting and changing actuating mechanism are linked into the gear of speed changer 5, judge whether shift-selecting and changing actuating mechanism is successfully linked into speed change
Device 5 is kept off, if it is successful, entering step 6), otherwise exits study failure；Judgement is linked into whether the gear of speed changer 5 is successfully according to choosing
Gear shifting actuating mechanism is when before the deadline whether gearshift position sensor value reaches in 5 gear position ranges and kept for one section
Between, if before the deadline, gearshift position sensor value reaches in 5 gear position ranges and is kept for a period of time, then hanging
Enter speed changer 5 to keep off successfully.The stipulated time is 2~5 seconds, is because shift-selecting and changing actuating mechanism executes time too long will lead to and changes
It keeps off motor overheating and damages.Described holding a period of time is more than or equal to 100 milliseconds, is according to speed changer and matching vehicle feature
It is determined by experiment.In the present embodiment: according to shift-selecting and changing actuating mechanism whether in 2 seconds gearshift position sensor value reaches 5
In gear position range and kept for 100 milliseconds of times judge whether success.
Step 6) is kept off from speed changer 5 to direction movement of reversing gear, and judges that speed changer 5 is kept off to whether direction movement of reversing gear succeeds,
If it is successful, entering step 7), study failure is otherwise exited；Judge to keep off from speed changer 5 to direction of reversing gear it is mobile whether be successfully
According to actuating motor stall of before the deadline, shifting gears, whether shift actuating motor locked rotor current is greater than setting value in program
And until gearshift position sensor value do not change, and keep a period of time, if before the deadline shift execute electricity
Machine locked rotor current be greater than program in setting value and until gearshift position sensor value do not change, and keep a period of time, that
Speed changer 5 keeps off to direction of reversing gear and moving successfully.The stipulated time is 5~10 seconds, is because shift-selecting and changing actuating mechanism executes
The too long shift actuating motor that will lead to was overheated and was damaged time.Described holding a period of time is more than or equal to 100 milliseconds, is basis
Speed changer and matching vehicle feature are determined by experiment.In the present embodiment: transmission control unit TCU opened loop control shifting
Executing agency keeps off from 5 to direction movement of reversing gear, and according to actuating motor stall of in defined 5 seconds, shifting gears, shift actuating motor is stifled
Turn whether electric current is greater than 10 amperes of programmed values and gearshift position sensor value does not change, and keeps 100 milliseconds of judgements
Whether succeed.The present invention keeps off to direction of reversing gear from speed changer 5 and slowly moving, and described keep off from speed changer 5 to direction of reversing gear slowly is moved
Dynamic is to control shift actuating motor movement speed according to shift actuating motor duty ratio size to realize that shift actuating motor accounts for
Sky is determined by experiment than size, because keeping off from speed changer 5 into the slow moving process in direction of reversing gear, movement cannot be too
Fastly, it will affect very much the accuracy of transmission reverse gear lock position study fastly；Movement can not be too slow, will affect slowly very much offline beat and
Cause shift actuating motor to work long hours to overheat and burn out, reducing can shift motor service life.Transmission control of the present invention
The voltage at unit TCU opened loop control shift-selecting and changing actuating mechanism motor both ends is 30%* battery voltage, is most preferred embodiment.
Step 7) records current gearshift position sensor value, obtain transmission reverse gear lock position original value Px (x=1,
2 or 3), and whether within the set range to judge transmission reverse gear lock position original value Px, if entered step in setting range
8) study failure, is otherwise exited；The setting range is 2850mV-2950mV, is according to the existing more changes with vehicle models
Fast device reverses gear what lock position range determined.If transmission reverse gear lock position original value Px is not in setting range in the step 7
Interior, i.e. the lock position original value that reverses gear of position sensor acquisition is wrong, it is therefore desirable to exit study.
Step 8) repeats step 3) to step 7) at least twice, and it is former to obtain at least three transmission reverse gear lock positions
Initial value P1, P2, P3, average Pavg, which uses present mean value calculation formula；
Step 9), transmission reverse gear lock position average value P avg are compared with setting range, and the setting range is root
Lock position of mechanically reversing gear according to speed changer and the lock position of reversing gear of Duo Tai same type speed changer sample are determined by experiment.Judgement
Transmission reverse gear lock position average value P avg whether within the set range, if within the set range, transmission reverse gear lock position
Average value, that is, transmission reverse gear locks physical location P, updates transmission reverse gear and locks physical location P, closes electricity under key, speed changer is fallen
Gear lock physical location P is saved in transmission control unit TCU nonvolatile memory；Otherwise study failure is exited.This step
It 9) is identical with the setting range in step 7).In the present embodiment: repeating step 3) and arrive step 7) twice, obtain three
Transmission reverse gear lock position original value P1, P2, P3, average Pavg, and by transmission reverse gear lock position average value P avg with
Setting range 2850mV-2950mV is compared, and is judged whether in setting range 2850mV-2950mV.
The control method of the transmission reverse gear lock position learning functionality of AMT vehicle of the present invention, using transmission control unit
TCU, engine electric-controlled unit ECU, offline equipment or failure diagnostic apparatus, the offline equipment or failure diagnostic apparatus and vehicle CAN
Interface connection is diagnosed, the study of transmission reverse gear lock position is inputted by the operation interface of offline equipment or failure diagnostic apparatus system and is referred to
It enables, the study of transmission reverse gear lock position is instructed in real time by CAN line and sends speed changer control to by offline equipment or failure diagnostic apparatus
Unit TCU processed, transmission control unit TCU are in the transmission reverse gear lock position for receiving offline equipment or failure diagnostic apparatus transmission
Start transmission reverse gear lock position learning program after study instruction, transmission control unit TCU is in real time by transmission reverse gear lock-bit
It sets study situation and feeds back to offline equipment or failure diagnostic apparatus, transmission reverse gear lock position learning success or failure.Starting or
Person, which exits transmission reverse gear lock position learning functionality, to be realized by the offline equipment of manual operation or failure diagnostic apparatus, under
Be provided in the operation panel of line equipment or failure diagnostic apparatus starting or exit transmission reverse gear lock position learning functionality by
Button.
Under it is shown in Figure 2, the engine electric-controlled unit ECU respectively with engine speed sensor, parking brake signal and
The output end of service brake signal is electrically connected, and engine electric-controlled unit ECU acquires engine speed sensor, parking brake, service brake letter in real time
Breath, and transmission control unit TCU is transferred to by CAN line.
The input terminal of the transmission control unit TCU is sensed with key, handle position sensor, gearbox oil temperature respectively
Device, bit selecting position sensor, bit selecting current of electric, shift actuating motor electric current, gearshift position sensor and clutch position pass
The output end of sensor is electrically connected, the output end of transmission control unit TCU respectively with bit selecting motor, shift actuating motor, clutch
The input terminal of device actuating motor is electrically connected, and the bit selecting motor and shift actuating motor drive shift-selecting and changing actuating mechanism to control speed change
Device, the clutch actuating motor drive clutch actuating mechanism to control clutch.
The transmission control unit TCU acquires key and handle position sensor signal in real time, is mounted on clutch holds
Clutch position sensor signal in row mechanism, the gearshift position sensor and bit selecting position sensing being mounted on speed changer
Device, vehicle speed sensor and transmission oil temperature sensor signal, bit selecting current of electric and shift actuating motor current signal.When offline
After equipment or the study instruction of failure diagnostic apparatus transmission reverse gear lock position, the TCU is according to present engine revolving speed, parking brake, foot
Brake, accelerator pedal position, key, handle position sensor, clutch position, input shaft rotating speed, speed and gearbox oil temperature etc.
Signal judges whether to meet transmission reverse gear lock position learning functionality condition, if meeting condition for study, the control of TCU closed loop location
Clutch separation, whether TCU separates completion according to clutch position sensor value real-time judge clutch, complete in clutch separation
Cheng Hou, TCU closed loop location control shift-selecting and changing actuating mechanism are linked into 5R neutral gears and 5 gears, and TCU is according to bit selecting position sensor and changes
Whether gear position sensor value real-time judge system is linked into 5R neutral gears of speed changer and 5 gears, is being linked into 5R neutral gears of speed changer
After 5 gears, TCU open loop duty ratio (i.e. duty ratio is fixed, and duty ratio will not change with change in location) controls speed changer
It keeps off from 5 to direction of reversing gear and acting, when stall occurs in shift actuating motor, shift actuating motor locked rotor current is greater than setting in program
Value and gearshift position sensor value does not change, current gearshift position sensor value, that is, transmission reverse gear lock position.The present invention
It is to be located at the position N in handle, gear pulls on parking brake in neutral gear, under inoperative engine conditions, is held using TCU control clutch
Row mechanism, the movement of gear selecting gear shifting actuating mechanism obtain transmission reverse gear lock physical location.
Specific embodiment 2:
Shown in Figure 5, the present embodiment is characterized in: shift-selecting and changing actuating mechanism be moved to 12 neutral gears of speed changer it
Before, clutch separation is carried out, and judge whether clutch separates success, if clutch separation success, executes shifting and execute
Mechanism is moved to 12 neutral gears of speed changer, otherwise exits study failure；It is described judge clutch whether separate successfully be according to from
At the appointed time whether clutch position sensor value reaches in the separating ranges of setting and is kept for a period of time clutch, if
Clutch position sensor value reaches in the separating ranges of setting and is kept for a period of time before the deadline, then clutch
It separates successfully.The stipulated time is 2~5 seconds, is from clutch from the point of view of protection clutch and clutch actuating motor
Separation executes the time, if clutch separation executes the time and too long clutch motor can be allowed to overheat, it is also possible to burn out clutch electricity
Machine.Described holding a period of time is more than or equal to 100 milliseconds, is to be determined according to speed changer and matching vehicle feature by test
's.The separating ranges of the setting are to be kept completely separate what range determined according to the more clutches with vehicle models, because every
Vehicle can all learn clutch separation limit point when dispatching from the factory, and be kept completely separate model according to clutch separation limit point come setpoint clutch
It encloses；And one trolley can only react single situation, it is therefore desirable to the clutch for counting more trolleys, which is kept completely separate range, can just determine
One general clutch for being suitble to all same types of vehicles is kept completely separate range.In the present embodiment: according to clutch whether 2
Clutch position sensor value reaches in 3700~4200mV of separating ranges of setting in second and 100 milliseconds of times judgements of holding are
No success, to reduce resistance of putting into gear.Other features are identical as specific embodiment 1.
Claims (6)
1. a kind of control method of transmission reverse gear lock position learning functionality, it is characterised in that: the following steps are included:
Step 1), starting transmission reverse gear lock position learning functionality；
Step 2 judges whether to meet transmission reverse gear lock position condition for study, enters step 3 if met, otherwise exit
Practise failure；
Step 3), shift-selecting and changing actuating mechanism are moved to 12 neutral gears of speed changer, judge whether shift-selecting and changing actuating mechanism successfully arrives at
12 neutral gears of speed changer otherwise exit study failure if it is successful, entering step 4)；Judge shift-selecting and changing actuating mechanism whether at
Function reach 12 neutral gears of speed changer be according to shift-selecting and changing actuating mechanism whether before the deadline gearshift position sensor value and
Bit selecting position sensor value reaches within the scope of 12 neutral gear positions and is kept for a period of time, if before the deadline, shift
Position sensor value and bit selecting position sensor value reach within the scope of 12 neutral gear positions and are kept for a period of time, then are moved to change
The 12 neutral gear successes of fast device；
Step 4), shift-selecting and changing actuating mechanism are moved to 5R neutral gears of speed changer, judge whether shift-selecting and changing actuating mechanism movement succeeds
Speed changer 5R neutral gear is reached, if it is successful, entering step 5), otherwise exits study failure；Judge that shift-selecting and changing actuating mechanism moves
It is dynamic whether to successfully arrive at 5R neutral gears of speed changer are that whether before the deadline drive range passes according to shift-selecting and changing actuating mechanism
Sensor value and bit selecting position sensor value reach within the scope of 5R neutral gear positions and are kept for a period of time, if in the defined time
Interior, gearshift position sensor value and bit selecting position sensor value reach within the scope of 5R neutral gear positions and are kept for a period of time, then
It is moved to 5R neutral gear successes of speed changer；
Step 5), shift-selecting and changing actuating mechanism are linked into the gear of speed changer 5, judge whether shift-selecting and changing actuating mechanism is successfully linked into speed changer 5
Gear otherwise exits study failure if it is successful, entering step 6)；Judgement is linked into whether the gear of speed changer 5 is successfully according to shifting
Before the deadline whether gearshift position sensor value reaches in 5 gear position ranges and is kept for a period of time for executing agency, such as
Before the deadline, gearshift position sensor value reaches in 5 gear position ranges and is kept for a period of time fruit, then being linked into speed change
Device 5 is kept off successfully；
Step 6) is kept off from speed changer 5 to direction movement of reversing gear, and judges that speed changer 5 is kept off to whether direction movement of reversing gear succeeds, if
7) success, enters step, otherwise exit study failure；Whether judge that speed changer 5 is kept off mobile to direction of reversing gear is successfully that basis exists
In the defined time, actuating motor stall of shifting gears, shift actuating motor locked rotor current whether be greater than in program setting value and until
Gearshift position sensor value does not change, and is kept for a period of time, if shifting gears actuating motor stall before the deadline
Electric current is greater than setting value in program and gearshift position sensor value does not change, and is kept for a period of time, then speed changer 5 is kept off
To reversing gear, direction is moved successfully；Step 7) records current gearshift position sensor value, and it is former to obtain transmission reverse gear lock position
Initial value Px, and whether within the set range to judge transmission reverse gear lock position original value Px, if entered step in setting range
8) study failure, is otherwise exited；
Step 8) repeats step 3) to step 7) at least twice, obtains at least three transmission reverse gear lock position original values
P1, P2, P3, average Pavg；
Transmission reverse gear lock position average value P avg is compared by step 9) with setting range, is judged whether in setting range
It is interior, if within the set range, transmission reverse gear lock position average value, that is, transmission reverse gear locks physical location P, update speed changer
It reverses gear and locks physical location P, transmission reverse gear lock physical location P is saved in nonvolatile memory, study is otherwise exited and loses
It loses.
2. the control method of transmission reverse gear lock position learning functionality according to claim 1, it is characterised in that: the step
It is rapid 2) in transmission reverse gear lock position condition for study include: key powers on, parking brake pull-up or service brake are stepped on, engine stop,
Clutch actuating motor does not have failure, clutch position sensor not to have failure, block selecting actuating motor not to have failure, block selecting position
Sensor does not have failure, shift actuating motor not to have failure, gearshift position sensor not to have failure, stationary vehicle；If met
3) all condition for study of transmission reverse gear lock position enter step, otherwise exit study failure.
3. the control method of transmission reverse gear lock position learning functionality according to claim 1, it is characterised in that: the step
Need for handle to be placed in the position neutral gear N before rapid 1) starting transmission reverse gear lock position study.
4. the control method of transmission reverse gear lock position learning functionality according to claim 1, it is characterised in that: the step
Rapid 3) shift-selecting and changing actuating mechanism is moved to before 12 neutral gears of speed changer, separates clutch, and judge whether clutch is separated into
Otherwise function exits study failure if clutch separation success, shift-selecting and changing actuating mechanism are moved to 12 neutral gears of speed changer.
5. the control method of transmission reverse gear lock position learning functionality according to claim 4, it is characterised in that: described to sentence
It is that at the appointed time whether clutch position sensor value reaches setting according to clutch that whether dialysis clutch, which separates successfully,
In separating ranges and kept for a period of time, if clutch position sensor value reaches the separation model of setting before the deadline
It in enclosing and is kept for a period of time, then clutch separation success.
6. the control method of transmission reverse gear lock position learning functionality according to claim 1, it is characterised in that: the step
Rapid 6) slowly to be moved using keeping off from speed changer 5 to direction of reversing gear, the speed changer 5 keeps off that slowly movement is that basis is changed to direction of reversing gear
Gear actuating motor duty ratio size is realized to control shift actuating motor movement speed.
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| CN109004871B (en) * | 2018-07-19 | 2019-11-26 | 温州长江汽车电子有限公司 | A kind of time progress control method of on-board air conditioner controller direct current generator |
| CN110792765B (en) * | 2018-08-02 | 2020-12-08 | 郑州宇通客车股份有限公司 | Self-learning control method and system for gear position of gearbox |
| CN110425275B (en) * | 2019-07-26 | 2021-11-30 | 中国第一汽车股份有限公司 | Transmission gear shifting control method |
| CN113085831B (en) * | 2020-01-07 | 2022-11-01 | 上海汽车集团股份有限公司 | Self-learning control method for sensor control unit of transmission |
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| JPS58180327A (en) * | 1982-04-17 | 1983-10-21 | Diesel Kiki Co Ltd | Position controller for automatic speed changer |
| US8812199B2 (en) * | 2008-10-29 | 2014-08-19 | Honda Motor Co., Ltd. | Method for learning reference position for transmission and vehicle |
| CN106594262B (en) * | 2015-10-15 | 2018-07-17 | 联合汽车电子有限公司 | The neutral gear decision threshold self study device and method of neutral position sensor signal |
| CN106678362B (en) * | 2016-12-27 | 2019-02-12 | 上海海积信息科技股份有限公司 | A kind of automobile gears judgment of learning method and apparatus |
| CN107061721B (en) * | 2017-05-31 | 2019-07-16 | 中国第一汽车股份有限公司 | The AMT transmission gear self-learning method of Double Motor Control |
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