CN111022628B - Electronic accelerator pedal characteristic self-learning method and automatic gearbox control unit - Google Patents
Electronic accelerator pedal characteristic self-learning method and automatic gearbox control unit Download PDFInfo
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- CN111022628B CN111022628B CN201911266947.6A CN201911266947A CN111022628B CN 111022628 B CN111022628 B CN 111022628B CN 201911266947 A CN201911266947 A CN 201911266947A CN 111022628 B CN111022628 B CN 111022628B
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- accelerator pedal
- electronic accelerator
- tcu
- self
- voltage value
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
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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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
- F16H2059/183—Rate of change of accelerator position, i.e. pedal or throttle change gradient
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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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- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1208—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures with diagnostic check cycles; Monitoring of failures
- F16H2061/1216—Display or indication of detected failures
-
- 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
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1224—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to a self-learning method for characteristics of an electronic accelerator pedal and an automatic gearbox control unit, and solves the problems that the conventional electronic accelerator pedal needs to be calibrated and the traveling danger is caused by overlarge idle stroke of the calibrated electronic accelerator pedal. The method comprises the following steps: 1) the TCU reads a voltage signal of the electronic accelerator pedal for at least ns, and when the voltage value acquired by the TCU is greater than a 0-opening voltage value, learning is started; 2) powering off the key, finishing self-learning if the TCU does not detect power-off information after ns, and executing the step 3 if the TCU detects the power-off information in ns; 3) the key is turned to an ON gear, the pedal is stepped down, the pedal is released, and a voltage value is recorded; 4) judging whether the maximum voltage value or the 2-time relation of the minimum voltage value of the two paths of analog voltage signals is established or not; 5) the TCU stores the maximum voltage value and the minimum voltage value of the larger one of the two paths of analog voltage signals; 6) the pedal opening is calculated using the voltage value stored in step 5.
Description
Technical Field
The invention relates to the field of pure electric vehicles (AMT), in particular to a self-learning method for characteristics of an electronic accelerator pedal and an automatic transmission control unit.
Background
For a fixed electronic accelerator pedal, the minimum value and the maximum value of the voltage (actual value) corresponding to the angle from 0% to 100% are fixed, if a self-learning function is not provided, the minimum value and the maximum value of the voltage corresponding to the internal calibrated opening degree from 0% to 100% of the TCU are also fixed, and if the two voltage values (actual value and calibrated value) do not match, the driving problem can be caused.
The electronic accelerator pedal is used to reflect the driver's driving demand, and directly influences the output torque of the motor as one of the main input signals of the TCU. However, the types and the performances of the pedals of various host manufacturers are different at present, and the labor intensity of a calibration engineer is increased by matching the pedals with different characteristics one by one; secondly, due to other uncertain factors such as temperature drift, the calibrated electronic accelerator pedal may output a voltage value under the condition that the driver does not step on the electronic accelerator pedal, and the voltage value exceeds the calibration range, so that the TCU outputs an acceleration signal to the motor, and driving danger is caused.
Disclosure of Invention
The invention aims to solve the problems that the conventional electronic accelerator pedal needs to be calibrated, and the electronic accelerator pedal after being calibrated has overlarge idle stroke and driving danger due to characteristic transformation caused by uncertain factors such as temperature drift and the like, and provides a characteristic self-learning method of the electronic accelerator pedal and an automatic gearbox control unit.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a self-learning method for characteristics of an electronic accelerator pedal comprises the following steps:
the method comprises the steps that firstly, a key is located in an ON gear, an instrument displays ready, a handle is arranged in a neutral gear, a hand brake is pulled, the vehicle speed is set to be zero, a TCU reads a voltage signal of an electronic accelerator pedal for at least ns, and when the voltage value acquired by the TCU is larger than the voltage value of 0 opening degree, electronic accelerator pedal preparation self-learning early warning information is sent to the instrument;
powering off the key, if the TCU does not detect power-off information after ns, finishing the self-learning, and simultaneously sending information for giving up the self-learning of the electronic accelerator pedal to the instrument, and if the TCU detects the power-off information in ns, executing a third step;
thirdly, the key is turned to the ON gear again, the electronic accelerator pedal is completely stepped, then the electronic accelerator pedal is completely released, and at the moment, the TCU synchronously acquires the maximum value and the minimum value of two paths of analog voltage signals of the electronic accelerator pedal;
step four, the TCU judges whether the 2-time relation between the larger path of voltage signal and the smaller path of voltage signal is established in the two paths of analog voltage signals, if the relation is not established, the TCU sends the fault information of the electronic accelerator pedal to the instrument, and the self-learning is finished; if yes, executing the step five;
step five, the TCU stores the maximum voltage value and the minimum voltage value of the larger one of the two paths of analog voltage signals in the EEPROM;
and step six, calculating the opening degree of the electronic accelerator pedal by using the voltage value stored in the step five after the TCU is electrified next time.
Further, in the first step, when the voltage value acquired by the TCU is greater than the voltage value of 0 opening degree, the buzzer is controlled to emit dripping sound, and the electronic accelerator pedal is sent to the instrument to prepare self-learning early warning information.
Further, in the first step, the electronic accelerator pedal is sent to the instrument through the can message to prepare self-learning early warning information.
Further, in the second step, the information for abandoning the self-learning of the electronic accelerator pedal is sent to the instrument through the can message.
Further, in the fourth step, the electronic accelerator pedal fault information is sent to the instrument through the can message.
Further, in the first step and the second step, n is 5.
At the same time, the invention also provides an automatic gearbox control unit, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method for self-learning the characteristics of an electronic accelerator pedal.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the self-learning method for the characteristics of the electronic accelerator pedal is arranged in the TCU, so that the electronic accelerator pedals with different characteristics are matched under the condition of no need of calibration, and the characteristic transformation of the electronic accelerator pedal caused by uncertain factors such as temperature drift and the like is realized, the problems of overlarge idle stroke of the electronic accelerator pedal, driving danger and the like are prevented, and the working intensity of a calibration engineer is reduced.
2. The self-learning method provided by the invention is simple and easy to use, has short operation time, and can finish learning within 20s under normal conditions.
3. The self-learning method provided by the invention is simple to operate, and learning can be completed only by twisting a key and stepping on the electronic accelerator pedal.
4. The self-learning method provided by the invention can automatically detect the characteristic change of the electronic accelerator pedal and give an alarm, thereby avoiding driving danger.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The invention sets a self-learning method for the characteristics of the electronic accelerator pedal in the TCU, and the TCU detects that the input signal meets certain conditions and spontaneously activates the self-learning method for the matching of the electronic accelerator pedal. The method does not need calibration, the TCU can be matched with electronic accelerator pedals of different manufacturers, and the electronic accelerator pedals with changed characteristics caused by uncertain factors such as temperature drift are re-matched, so that the working intensity of calibration engineers is greatly reduced. Meanwhile, the method can automatically detect the characteristic change of the electronic accelerator pedal and give an alarm to avoid driving danger.
The invention provides a self-learning method of electronic accelerator pedal characteristics, which specifically comprises the following steps:
the method comprises the steps that firstly, a key is located at an ON gear, an instrument displays ready, a handle is arranged at a neutral gear, a hand brake is pulled, the rotating speed of an output shaft of a gearbox is zero (the vehicle speed is zero), a TCU reads a voltage signal of an electronic accelerator pedal for at least 5s (the voltage signal CAN be maintained for 5s when a driver steps ON the electronic accelerator pedal, or the driver does not step ON the electronic accelerator pedal but the actual value is greater than a calibrated value due to the change of the characteristic of the electronic accelerator pedal), when the voltage value acquired by the TCU is greater than the voltage value of 0 opening (the voltage value exceeds the calibrated 0 opening), the TCU controls a buzzer to emit a dripping sound, and meanwhile, the electronic accelerator pedal is sent to the instrument through a CAN message to prepare self-learning early warning information; at this time, if the driver steps on the electronic accelerator pedal, the electronic accelerator pedal is completely released;
step two, powering OFF the key, namely, turning the key to an OFF gear, if the TCU does not detect power-OFF information after 5s, finishing the self-learning, stopping sounding the buzzer, and simultaneously sending the self-learning information of the abandoned electronic accelerator pedal to the instrument through the CAN message; if the TCU detects the power-off information within 5s, executing a step three;
thirdly, the key is turned to the ON gear again, the electronic accelerator pedal is completely stepped ON, then the electronic accelerator pedal is completely released (the electronic accelerator pedal can be stepped ON in the driving process or the static process), the process can be repeated for several times, at the moment, the TCU synchronously acquires the maximum value and the minimum value of two paths of analog voltage signals of the electronic accelerator pedal, namely the TCU records the voltage range of the electronic accelerator pedal in the whole electrifying process;
step four, the TCU judges whether a 2-time relation between a larger one-way voltage signal and a smaller one-way voltage signal is established in the two analog voltage signals, namely whether the maximum voltage value of the larger one-way voltage signal is 2 times of the maximum voltage value of the other one-way voltage signal or whether the minimum voltage value of the larger one-way voltage signal is 2 times of the minimum voltage value of the other one-way voltage signal, if the maximum voltage value of the larger one-way voltage signal is not established, the TCU sends electronic accelerator pedal fault information to the instrument through a can message, and self-learning is finished; if yes, executing the step five;
step five, the TCU stores the maximum voltage value and the minimum voltage value of the larger one of the two paths of analog voltage signals in the EEPROM;
and step six, after the TCU is electrified next time, calculating the opening degree of the electronic accelerator pedal by using the voltage value stored in the step five, wherein the minimum value is a 0-opening-degree voltage value, and the maximum value is a 100-percent opening-degree voltage value.
Furthermore, the invention provides an automatic gearbox control unit having a computer program stored thereon, which computer program, when being executed by a processor, carries out the steps of the method for self-learning characteristics of an electronic accelerator pedal.
Claims (7)
1. A self-learning method for characteristics of an electronic accelerator pedal is characterized by comprising the following steps:
the method comprises the steps that firstly, a key is located in an ON gear, an instrument displays ready, a handle is arranged in a neutral gear, a hand brake is pulled, the vehicle speed is set to be zero, a TCU reads a voltage signal of an electronic accelerator pedal for at least ns, and when the voltage value acquired by the TCU is larger than the voltage value of 0 opening degree, electronic accelerator pedal preparation self-learning early warning information is sent to the instrument;
powering off the key, if the TCU does not detect power-off information after ns, finishing the self-learning, and simultaneously sending information for giving up the self-learning of the electronic accelerator pedal to the instrument, and if the TCU detects the power-off information in ns, executing a third step;
thirdly, the key is turned to the ON gear again, the electronic accelerator pedal is completely stepped, then the electronic accelerator pedal is completely released, and at the moment, the TCU synchronously acquires the maximum value and the minimum value of two paths of analog voltage signals of the electronic accelerator pedal;
step four, the TCU judges whether the 2-time relation between the larger path of voltage signal and the smaller path of voltage signal is established in the two paths of analog voltage signals, if the relation is not established, the TCU sends the fault information of the electronic accelerator pedal to the instrument, and the self-learning is finished; if yes, executing the step five;
step five, the TCU stores the maximum voltage value and the minimum voltage value of the larger one of the two paths of analog voltage signals in the EEPROM;
and step six, calculating the opening degree of the electronic accelerator pedal by using the voltage value stored in the step five after the TCU is electrified next time.
2. The electronic accelerator pedal characteristic self-learning method according to claim 1, wherein: in the first step, when the voltage value acquired by the TCU is larger than the voltage value of 0 opening degree, the buzzer is controlled to emit dripping sound, and the electronic accelerator pedal is sent to the instrument to prepare self-learning early warning information.
3. The electronic accelerator pedal characteristic self-learning method according to claim 1 or 2, wherein: in the first step, the electronic accelerator pedal is sent to the instrument through the can message to prepare self-learning early warning information.
4. The electronic accelerator pedal characteristic self-learning method according to claim 3, wherein: and step two, sending information for abandoning self-learning of the electronic accelerator pedal to the instrument through the can message.
5. The electronic accelerator pedal characteristic self-learning method according to claim 4, wherein: and in the fourth step, sending the fault information of the electronic accelerator pedal to the instrument through the can message.
6. The electronic accelerator pedal characteristic self-learning method according to claim 5, wherein: in the first step and the second step, n is 5.
7. An automatic transmission control unit having a computer program stored thereon, characterized in that: the computer program when executed by a processor implements the steps of the method of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911266947.6A CN111022628B (en) | 2019-12-11 | 2019-12-11 | Electronic accelerator pedal characteristic self-learning method and automatic gearbox control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911266947.6A CN111022628B (en) | 2019-12-11 | 2019-12-11 | Electronic accelerator pedal characteristic self-learning method and automatic gearbox control unit |
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| Publication Number | Publication Date |
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| CN111022628A CN111022628A (en) | 2020-04-17 |
| CN111022628B true CN111022628B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911266947.6A Active CN111022628B (en) | 2019-12-11 | 2019-12-11 | Electronic accelerator pedal characteristic self-learning method and automatic gearbox control unit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901355B (en) * | 2021-02-05 | 2023-05-23 | 潍柴动力股份有限公司 | Method, device and system for self-adaptive correction of engine accelerator pedal |
| CN114263546B (en) * | 2021-12-30 | 2023-03-31 | 易通共享技术(广州)有限公司 | Self-learning correction method and system for automobile pedal travel signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4165301B2 (en) * | 2003-05-30 | 2008-10-15 | 日産自動車株式会社 | Vehicle throttle control method |
| DE102008021385B3 (en) * | 2008-04-29 | 2009-11-19 | Continental Automotive Gmbh | Method and apparatus for learning the rest position of the accelerator pedal of a motor vehicle |
| CN106089459B (en) * | 2016-07-25 | 2019-01-15 | 潍柴动力股份有限公司 | A kind of method of electric-control motor gas pedal characteristic self study |
| CN106218553B (en) * | 2016-08-03 | 2018-09-11 | 北京新能源汽车股份有限公司 | Method and device for learning minimum voltage of accelerator pedal sensor and vehicle control unit |
| CN109291934B (en) * | 2017-07-24 | 2020-07-03 | 长城汽车股份有限公司 | Self-learning method and system for minimum position of accelerator pedal and vehicle |
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