CN111350813A - Self-learning method for whole-vehicle off-line clutch of automatic transmission - Google Patents
Self-learning method for whole-vehicle off-line clutch of automatic transmission Download PDFInfo
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- CN111350813A CN111350813A CN202010221427.XA CN202010221427A CN111350813A CN 111350813 A CN111350813 A CN 111350813A CN 202010221427 A CN202010221427 A CN 202010221427A CN 111350813 A CN111350813 A CN 111350813A
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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
- F16H61/04—Smoothing ratio shift
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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
- F16H2061/0075—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 a particular control method
- F16H2061/0087—Adaptive control, e.g. the control parameters adapted by learning
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
The invention discloses a self-learning method for an automatic transmission whole vehicle off-line clutch, which comprises the following steps: the method comprises the following steps: electrifying the key of the whole vehicle, reading the fault code by the automatic transmission control unit, judging whether the rotating speed is in a reasonable range and has no other faults when the fault lamp of the transmission flashes slowly, if so, prompting that offline self-learning is needed and executing the step two, and otherwise, executing the step one again; step two: entering a D/R gear, performing self-learning of a D gear clutch and a R gear clutch, judging whether a fault lamp is turned off or not after the self-learning of the D gear clutch and the self-learning of the R gear clutch are finished, if so, executing the step III, otherwise, executing the step II again; step three: and completing the self-learning of the clutch, and simultaneously writing the D gear learning value and the R gear learning value into an EEPROM. The method is simple in operation and compact in time control, so that the mass production takt of the automatic transmission of the automobile is met, and the consistency of gear shifting impact of an off-line vehicle can be ensured.
Description
Technical Field
The invention belongs to the technical field of control of automatic transmissions of automobiles, and particularly relates to a self-learning method for an off-line clutch of an entire automobile of an automatic transmission.
Background
At present, the installation rate of an automatic transmission of an automobile is higher and higher, meanwhile, the requirement of a driver on the quality of the automobile is gradually improved, particularly, under the static working condition of the automobile, the driver is sensitive to the shifting comfort of a shifting handle, the method is a great challenge for the shifting impact of a clutch of the automatic transmission, mainly, the automatic transmission has multiple types of automatic transmission parts, large size difference and complex related size chains, if the size error of the parts is strictly controlled, index labor cost and equipment cost must be invested, the method is not advisable, but the method starts from a TCU software control strategy layer, the shifting impact of the clutch is improved, and the same effect can be achieved with lower cost.
Based on the above, a self-learning method of the off-line clutch of the whole automobile of the automatic transmission needs to be designed urgently to meet the requirement of mass production takt of the automatic transmission of the automobile and guarantee the consistency of gear shifting impact of the off-line automobile.
Disclosure of Invention
Technical problem to be solved
Based on the self-learning method, the self-adaptive learning control method is simple to operate and compact in time control, can solve the problem of gear shifting impact consistency of the existing matched automatic transmission clutch, ensures the gear shifting quality of the whole automobile on-line on a large scale, and can realize large-scale safe production of the automatic transmission of the automobile through software.
(II) technical scheme
The invention discloses a self-learning method for an automatic transmission off-line clutch of a whole vehicle, which comprises the following steps:
the method comprises the following steps: electrifying the key of the whole vehicle, reading the fault code by the automatic transmission control unit, judging whether the rotating speed is in a reasonable range and has no other faults when the fault lamp of the transmission flashes slowly, if so, prompting that offline self-learning is needed and executing the step two, and otherwise, executing the step one again;
step two: entering a D/R gear, performing self-learning of a D gear clutch and a R gear clutch, judging whether a fault lamp is turned off or not after the self-learning of the D gear clutch and the self-learning of the R gear clutch are finished, if so, executing the step III, otherwise, executing the step II again;
the self-learning of the D-gear clutch comprises the steps that a whole vehicle is in a key power-on state, an engine is not started, a left foot steps on a brake pedal, a right foot steps on an accelerator pedal to the bottom, then the accelerator pedal is released immediately, the left foot brake pedal is kept to be stepped down in the whole process, the engine is started within 10s, a gear shifting handle is operated to shift from a P gear to a D gear, a fault lamp of a transmission is normally lightened, the self-learning function of the clutch is prompted to start, about 20-30 s are waited, the self-learning is finished, clutch current △ I is obtained to serve as a learning value of the D gear, the fault lamp of the transmission is extinguished, the P gear is withdrawn, the engine;
the R gear clutch self-learning comprises the steps that the whole vehicle is in a key power-on state, the engine is not started, the left foot steps on the brake pedal, the right foot steps on the accelerator pedal to the bottom, then the accelerator pedal is released immediately, the left foot brake pedal is kept to be stepped down in the whole process, the engine is started within 10s, the gear shifting handle is operated to shift the R gear from the P gear, the fault lamp of the transmission is normally lightened, the clutch self-learning function is prompted to start, about 20-30 s are waited, the self-learning is completed, the clutch current △ I is obtained to serve as the learning value of the R gear, the fault lamp of the transmission is turned off, the P gear is withdrawn, the engine is turned off.
Step three: and completing the self-learning of the clutch, and simultaneously writing the D gear learning value and the R gear learning value into an EEPROM.
Further, reading the fault code in the first step through an OBD diagnostic instrument.
Further, when the whole vehicle is in a key power-on state, if the engine is not started within 10s, the self-learning condition of the clutch at this time is not met, and the subsequent steps cannot be carried out.
Further, before the prompt of the clutch self-learning function in the step two is started, the following conditions need to be satisfied: the water temperature of the engine is 50-110 ℃, the oil temperature of the transmission is 30-110 ℃, the target idle speed of the engine is below 950rpm, the signal of an accelerator pedal is normal, the signal of a brake is normal, and the transmission has no other faults.
Further, when the engine water temperature, the transmission oil temperature, the engine target idle speed, the accelerator pedal signal is normal, the brake signal is normal and the transmission has no other faults and does not meet the conditions, the transmission fault lamp can flicker all the time, the transmission fault lamp cannot be changed from slow flashing to constant brightness, and at the moment, the clutch self-learning cannot be carried out.
Further, when the clutch self-learning function is started, the rotation speed difference between the target engine and the turbine is set to be 60rpm, and the clutch current △ I is controlled by adopting a PID control algorithm so that the rotation speed difference is within 60 rpm.
Further, an integral term I of the output PID is used as a self-learning condition, the clutch current △ I is self-accumulated by 1mA if the value of the I term is smaller than-0.5, the clutch current △ I is self-accumulated by 1mA if the value of the I term is larger than 0.5, the clutch self-learning is completed when the value of the I term is larger than-0.5 and smaller than 0.5, and the accumulated clutch current △ I is a learning value.
Further, the third step further comprises: and writing the D gear learning value and the R gear learning value into a storage unit EEPROM of the TCU, and simultaneously clearing fault codes indicating that the clutch is not offline. .
In another aspect, the present invention also discloses a transmission controller comprising: at least one processor; and at least one memory communicatively coupled to the processor, wherein: the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the automatic transmission whole vehicle off-line clutch self-learning method.
In another aspect, the present invention also discloses a non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the automatic transmission off-board clutch self-learning method as described in any one of the above aspects.
(III) advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
(1) the self-learning method of the invention has low cost, can solve the problem of shifting impact of the automatic transmission through offline self-learning, can meet the mass production takt of the automatic transmission of the automobile, and can ensure the consistency of shifting impact of the offline vehicle.
(2) The self-learning method is simple and convenient to operate and compact in time control;
(3) the self-learning entering condition and the completing condition of the D/R gear clutch of the invention take the actual driving situation into consideration, thereby ensuring the reliability and the effectiveness of the learning value of the D/R gear.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
FIG. 1 is a flow chart of steps of a self-learning method of an automatic transmission off-line clutch of a whole vehicle in an embodiment of the invention.
Detailed Description
The present invention will be described more fully hereinafter with reference to the accompanying drawings and examples, in which the technical problems and advantages of the present invention are solved, wherein the described examples are only intended to facilitate the understanding of the present invention, and are not to be construed as limiting in any way.
As shown in fig. 1, the self-learning method of the off-line clutch of the automatic transmission comprises the following steps:
the method comprises the following steps: the key of the whole vehicle is electrified, the control unit of the automatic transmission reads the fault code, and the clutch is offline and self-learning is not completed; when the fault lamp of the transmission flashes slowly, whether the rotating speed is in a reasonable range or not and other faults do not exist is judged, if yes, offline self-learning is prompted, and the step two is executed, otherwise, the step one is executed again;
step two: entering a D/R gear, performing self-learning of a D gear clutch and a R gear clutch, judging whether a fault lamp is turned off or not after the self-learning of the D gear clutch and the self-learning of the R gear clutch are finished, if so, executing a third step, otherwise, executing a second step again;
the self-learning of the D-gear clutch is that a whole vehicle is in a key power-on state, an engine is not started, a left foot steps on a brake pedal, a right foot steps on an accelerator pedal to the bottom, then the accelerator pedal is released immediately, the left foot brake pedal is kept to be stepped down in the whole process, the engine is started within 10s, a gear shifting handle is operated to shift from a P gear to a D gear, a fault lamp of a transmission is normally lightened, the self-learning function of the clutch is prompted to start, about 20-30 s is waited, the self-learning is finished, clutch current △ I is obtained to serve as a learning value of the D gear, the fault lamp of the transmission is extinguished, the P gear is withdrawn, the engine is extinguished;
similarly, the R gear clutch self-learning adopts the same steps as those in the D gear clutch self-learning, the R gear is engaged, and the whole clutch offline learning function is completed.
The R gear clutch self-learning method comprises the steps that a whole vehicle is in a key power-on state, an engine is not started, a left foot treads a brake pedal, a right foot treads an accelerator pedal to the bottom, then the accelerator pedal is released immediately, the left foot brake pedal is kept to be stepped down in the whole process, the engine is started within 10s, a gear shifting handle is operated to shift from a P gear to an R gear, a fault lamp of a transmission is normally lightened, the self-learning function of the clutch is prompted to start, about 20-30 s is waited, the self-learning is finished, clutch current △ I is obtained to serve as a learning value of the R gear, the fault lamp of the transmission is turned off, the P gear is removed, the engine is turned off, and;
step three: and completing the self-learning of the clutch, and simultaneously writing the D gear learning value and the R gear learning value into the EEPROM.
Further, in the second step, the R-range clutch may be self-learned first and then the D-range clutch may be self-learned later, or the D-range clutch may be self-learned first and then the R-range clutch may be self-learned later).
Further, reading the fault code in the first step through an OBD diagnostic instrument to perform redundant transmission of fault information.
Further, when the whole vehicle is in a key power-on state, if the engine is not started within 10s, the self-learning condition of the clutch at this time is not met, and the subsequent steps cannot be carried out.
Further, before prompting the start of the clutch self-learning function in the step two, the following conditions need to be met: the water temperature of the engine is 50-110 ℃, the oil temperature of the transmission is 30-110 ℃, the target idle speed of the engine is below 950rpm, the signal of an accelerator pedal is normal, the signal of a brake is normal, and the transmission has no other faults.
Further, when the engine water temperature, the transmission oil temperature, the engine target idle speed, the accelerator pedal signal is normal, the brake signal is normal and the transmission has no other faults and does not meet the conditions, the transmission fault lamp can flicker all the time, the transmission fault lamp cannot be changed from slow flashing to constant brightness, and at the moment, the clutch self-learning cannot be carried out.
Further, when the clutch self-learning function is started, the rotating speed difference between the target engine and the turbine is set to be 60rpm, and the clutch current △ I is controlled by adopting a PID control algorithm, so that the rotating speed difference between the engine and the turbine is 60 rpm.
Further, an integral term I of the output PID is used as a self-learning condition, if the value of the I term is smaller than-0.5, the clutch current is self-accumulated to 1mA, if the value of the I term is larger than 0.5, the clutch current is self-accumulated to 1mA, and when the value of the I term is larger than-0.5 and smaller than 0.5, the self-learning of the clutch is finished, and the accumulated △ I current of the clutch is the learning value.
Further, in the third step, after △ I current learning of the D gear and the R gear is finished, the learning value of the D gear and the learning value of the R gear are written into the storage unit EEPROM of the TCU, and fault codes indicating that the clutch is not completely off are cleared.
In summary, the automatic transmission whole vehicle off-line clutch self-learning method can be used for engaging the D gear or the R gear through manual operation, automatically sending information through the TCU to complete D gear clutch self-learning and R gear clutch self-learning, and finding the optimal clutch current as a self-learning value to complete clutch gear shifting impact optimization and improve the whole vehicle comfort.
In the embodiments provided in the present invention, it should be understood that the disclosed control method and system can be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit. The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, the description is as follows: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A self-learning method for an offline clutch of an automatic transmission on a whole vehicle is characterized by comprising the following steps:
the method comprises the following steps: electrifying the key of the whole vehicle, reading the fault code by the automatic transmission control unit, judging whether the rotating speed is in a reasonable range and has no other faults when the fault lamp of the transmission flashes slowly, if so, prompting that offline self-learning is needed and executing the step two, and otherwise, executing the step one again;
step two: entering a D/R gear, performing self-learning of a D gear clutch and a R gear clutch, judging whether a fault lamp is turned off or not after the self-learning of the D gear clutch and the self-learning of the R gear clutch are finished, if so, executing the step III, otherwise, executing the step II again;
the self-learning of the D-gear clutch comprises the steps that a whole vehicle is in a key power-on state, an engine is not started, a left foot steps on a brake pedal, a right foot steps on an accelerator pedal to the bottom, then the accelerator pedal is released immediately, the left foot brake pedal is kept to be stepped down in the whole process, the engine is started within 10s, a gear shifting handle is operated to shift from a P gear to a D gear, a fault lamp of a transmission is normally lightened, the self-learning function of the clutch is prompted to start, about 20-30 s are waited, the self-learning is finished, clutch current △ I is obtained to serve as a learning value of the D gear, the fault lamp of the transmission is extinguished, the P gear is withdrawn, the engine;
the R gear clutch self-learning comprises the steps that the whole vehicle is in a key power-on state, the engine is not started, the left foot steps on the brake pedal, the right foot steps on the accelerator pedal to the bottom, then the accelerator pedal is released immediately, the left foot brake pedal is kept to be stepped down in the whole process, the engine is started within 10s, the gear shifting handle is operated to shift the R gear from the P gear, the fault lamp of the transmission is normally lightened, the clutch self-learning function is prompted to start, about 20-30 s are waited, the self-learning is completed, the clutch current △ I is obtained to serve as the learning value of the R gear, the fault lamp of the transmission is turned off, the P gear is withdrawn, the engine is turned off.
Step three: and completing the self-learning of the clutch, and simultaneously writing the D gear learning value and the R gear learning value into an EEPROM.
2. The automatic transmission vehicle off-line clutch self-learning method according to claim 1, wherein the fault code in the first step is read by an OBD (on-Board diagnostics) instrument.
3. The self-learning method of the automatic transmission off-line clutch for the whole vehicle as claimed in claim 1, wherein when the whole vehicle is in a key power-on state, if the engine is not started within 10s, the self-learning condition of the clutch at this time is not satisfied, and the subsequent steps cannot be performed.
4. The automatic transmission vehicle off-line clutch self-learning method as claimed in claim 1, wherein in step two, before the prompt clutch self-learning function starts, the following conditions are required to be satisfied: the water temperature of the engine is 50-110 ℃, the oil temperature of the transmission is 30-110 ℃, the target idle speed of the engine is below 950rpm, the signal of an accelerator pedal is normal, the signal of a brake is normal, and the transmission has no other faults.
5. The self-learning method of the automatic transmission off-board clutch on-board vehicle according to claim 4, characterized in that when the conditions that the engine water temperature, the transmission oil temperature, the engine target idle speed, the accelerator pedal signal is normal, the brake signal is normal and the transmission has no other faults are not met, the transmission fault lamp is flickering all the time, the transmission fault lamp is not changed from slow flickering to constant brightening, and the clutch self-learning can not be carried out at the moment.
6. The automatic transmission off-board clutch self-learning method for the whole vehicle as claimed in claim 1, wherein the clutch self-learning function is started by setting a rotation speed difference between a target engine and a turbine to be 60rpm, and controlling a clutch current △ I by adopting a PID control algorithm so that the rotation speed difference is within 60 rpm.
7. The automatic transmission vehicle off-board clutch self-learning method as claimed in claim 6, wherein an integral term I of the output PID is used as a self-learning condition, the clutch current △ I self-accumulates 1mA if the value of the term I is less than-0.5, the clutch current △ I self-accumulates to reduce 1mA if the value of the term I is greater than 0.5, the clutch self-learning is completed when the value of the term I is greater than-0.5 and less than 0.5, and the accumulated clutch current △ I is the learning value.
8. The self-learning method of the automatic transmission vehicle off-line clutch according to claim 1, wherein the third step further comprises: and writing the D gear learning value and the R gear learning value into a storage unit EEPROM of the TCU, and simultaneously clearing fault codes indicating that the clutch is not offline.
9. A transmission controller, comprising:
at least one processor; and at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the method for self-learning of the off-board clutch of the automatic transmission according to any one of claims 1 to 8.
10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the automatic transmission off-board clutch self-learning method according to any one of claims 1 to 8.
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