CN117006241B - PID control method for clutch pressure in automatic transmission power downshifting process - Google Patents
PID control method for clutch pressure in automatic transmission power downshifting process Download PDFInfo
- Publication number
- CN117006241B CN117006241B CN202311209352.3A CN202311209352A CN117006241B CN 117006241 B CN117006241 B CN 117006241B CN 202311209352 A CN202311209352 A CN 202311209352A CN 117006241 B CN117006241 B CN 117006241B
- Authority
- CN
- China
- Prior art keywords
- clutch
- pressure
- torque
- pid control
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title abstract description 13
- 230000003993 interaction Effects 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims abstract description 8
- 238000011217 control strategy Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
- F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
-
- 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
-
- 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
- F16H2061/0046—Details of fluid supply channels, e.g. within shafts, for supplying friction devices or transmission actuators with control fluid
-
- 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
- F16H2061/0078—Linear control, e.g. PID, state feedback or Kalman
-
- 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
- F16H2061/0474—Smoothing ratio shift by smoothing engagement or release of positive clutches; Methods or means for shock free engagement of dog clutches
-
- 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
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
- F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
- F16H2061/062—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means for controlling filling of clutches or brake servos, e.g. fill time, fill level or pressure during filling
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a PID control method of clutch pressure in the power down shift process of an automatic transmission, which comprises the following steps: controlling the hydraulic system to maintain pressure for a certain time; when the change of the target gear signal is identified, the pressure of a main oil way of the hydraulic system is rapidly increased; the first stage of power downshifting controls the prefill time and the holding kisspoint point of the combined side in stages, and the separated side is separated according to the two-stage slope; the combination side of the second stage of gear shifting still keeps kisspoint points, the separation side enters PID control, and closed-loop PID adjustment is carried out on the basis of feedforward until the change of the turbine speed of the transmission is completed; the disengaging side descends to a clutch disengaging point in the torque interaction time, the combining side is lifted to a clutch in the torque interaction time to completely transmit torque, and clutch pressure is rapidly lifted and gear shifting is completed after the torque interaction is finished. The invention can ensure that the pressure is always at a proper level in the power down shift process of different torques of the engine.
Description
Technical Field
The invention relates to a control method for a power down shift process of an automatic transmission, in particular to a PID control method for clutch pressure in the power down shift process of the automatic transmission.
Background
AT present, the technology of automatic transmission in China is developed very rapidly, but the technology of AT automatic transmission is basically known abroad. The power downshift pressure control in an AT transmission basically adopts a combination of open loop slope control and closed loop PID control, but this control method may cause a pressure shortage or an excessive pressure during the power downshift when dealing with different torque downshifts of the engine.
Disclosure of Invention
The invention aims to provide a PID control method for clutch pressure in the power downshifting process of an automatic transmission, so as to ensure that the pressure in the power downshifting process of different torques of an engine is always at a proper level.
The invention aims at realizing the following technical scheme:
a PID control method of clutch pressure during a power downshift of an automatic transmission, comprising the steps of:
(1) Controlling the hydraulic system to maintain pressure for a certain time;
(2) When the change of the target gear signal is identified, the pressure of a main oil way of the hydraulic system is rapidly increased to the maximum;
(3) The first stage of power downshifting controls the oil pre-filling time of the combining side and keeps a semi-separating point in a staged way, and the separating side separates according to two-stage slopes;
(4) The combination side still keeps a half-clutch point in the second stage of gear shifting, the separation side enters PID control, a target electromagnetic valve current viscosity point under the current transmission input torque is found out according to the basic characteristic search value of the clutch, a reserved value is added as a feedforward value of PID, and closed-loop PID adjustment is carried out on the basis of feedforward until the change of the turbine speed of the transmission is completed;
(5) The third phase of gear shifting is a torque interaction phase, the separation side descends to a clutch separation point in the torque interaction time, the combination side is lifted to a clutch in the torque interaction time to completely transmit torque, and after the torque interaction is finished, the pressure of the clutch at the combination side is rapidly lifted and gear shifting is completed.
Compared with the prior art, the invention has the following advantages:
aiming at power downshift gear shifting, the invention designs a PID control strategy of clutch pressure in the power downshift process of an automatic transmission through analysis of characteristics of a hydraulic system to ensure gear shifting smoothness and responsiveness, so that the pressure in the power downshift gear shifting process is controlled more accurately, and the gear shifting quality is improved.
Drawings
FIG. 1 is a control diagram of a power downshift process, wherein: ① A power downshift phase1 phase, a ② power downshift phase2 phase, a ③ power downshift phase3 phase, a ④ power downshift shift beginning, a turbine speed of the ⑤ power transmission, a split-side control current during ⑥ power downshift, a first point (a sticking point+a reserved amount) at which the split-side control current decreases during ⑦ power downshift, a start point of the split-side PID control during ⑧ power downshift, that is, a PID control feedforward value, a split-side control current of a torque interaction phase during ⑨ power downshift, a split-side control current during ⑩ power downshift, a split-side prefill oil control current during ⑪ power downshift, a split-side control current during ⑫ power downshift maintaining a torque transfer point, and a split-side control current during ⑬ power downshift rising to dm (a sticking point+a protection value), the split-side control current during ⑭ power downshift being combined with a large slope.
Detailed Description
The following description of the present invention is provided with reference to the accompanying drawings, but is not limited to the following description, and any modifications or equivalent substitutions of the present invention should be included in the scope of the present invention without departing from the spirit and scope of the present invention.
The invention provides a PID control method of clutch pressure in the power down shift process of an automatic transmission, as shown in figure 1, the control steps of the power down shift process are as follows:
(1) The hydraulic system is required to have a dwell time of at least 0.2s;
(2) When the change of the target gear signal is identified, the pressure of a main oil way of the hydraulic system is rapidly increased to the maximum;
(3) The first stage of power down shift controls the prefill oil time and the half-separation point of the combining side in stages, and the separating side separates according to two-stage slopes, wherein: the pre-filling time and the size of the half clutch point are determined by clutch characteristics, and the slope size is calibrated according to the drivability of the whole vehicle;
(4) The combination side still keeps a half-clutch point in the second stage of gear shifting, the separation side enters PID control, a target electromagnetic valve current viscosity point under the current transmission input torque is found out according to the basic characteristic search value of the clutch, a reserved value is added as a feedforward value of PID, and closed-loop PID adjustment is carried out on the basis of feedforward until the change of the turbine speed of the transmission is completed;
(5) The third phase of shifting is a torque interaction phase, the separation side descends to a clutch separation point in the torque interaction time, the combination side is lifted to a clutch in the torque interaction time to completely transmit torque, and after the torque interaction is finished, the pressure of the clutch at the combination side is rapidly lifted and the gear shifting is completed, wherein: the torque interaction time is calibrated according to the drivability of the whole vehicle.
Claims (2)
1. A PID control method of clutch pressure during a power downshift of an automatic transmission, characterized in that the method comprises the steps of:
(1) Controlling the hydraulic system to maintain pressure for a certain time;
(2) When the change of the target gear signal is identified, the pressure of a main oil way of the hydraulic system is rapidly increased to the maximum;
(3) The first stage of power downshifting controls the oil pre-filling time of the combining side and keeps a semi-separating point in a staged way, and the separating side separates according to two-stage slopes;
(4) The combination side still keeps a half-clutch point in the second stage of gear shifting, the separation side enters PID control, a target electromagnetic valve current viscosity point under the current transmission input torque is found out according to the basic characteristic search value of the clutch, a reserved value is added as a feedforward value of PID, and closed-loop PID adjustment is carried out on the basis of feedforward until the change of the turbine speed of the transmission is completed;
(5) The third phase of gear shifting is a torque interaction phase, the separation side descends to a clutch separation point in the torque interaction time, the combination side is lifted to a clutch in the torque interaction time to completely transmit torque, and after the torque interaction is finished, the pressure of the clutch at the combination side is rapidly lifted and gear shifting is completed.
2. The PID control method of clutch pressure during a power downshift of an automatic transmission according to claim 1, wherein the dwell time is at least 0.2s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311209352.3A CN117006241B (en) | 2023-09-19 | 2023-09-19 | PID control method for clutch pressure in automatic transmission power downshifting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311209352.3A CN117006241B (en) | 2023-09-19 | 2023-09-19 | PID control method for clutch pressure in automatic transmission power downshifting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117006241A CN117006241A (en) | 2023-11-07 |
| CN117006241B true CN117006241B (en) | 2024-08-23 |
Family
ID=88569263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311209352.3A Active CN117006241B (en) | 2023-09-19 | 2023-09-19 | PID control method for clutch pressure in automatic transmission power downshifting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117006241B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307269A (en) * | 2012-03-15 | 2013-09-18 | 通用汽车环球科技运作有限责任公司 | System and method for determining clutch gains in a transmission during a power downshift |
| CN108116400A (en) * | 2016-11-29 | 2018-06-05 | 丰田自动车株式会社 | The control device of vehicle driving apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790418A (en) * | 1987-04-30 | 1988-12-13 | Ford Motor Company | Transmission clutch loop transfer control |
| JP6396956B2 (en) * | 2016-07-29 | 2018-09-26 | 株式会社Ｓｕｂａｒｕ | Shift control system and shift control device |
| CN110925416A (en) * | 2020-02-19 | 2020-03-27 | 盛瑞传动股份有限公司 | Torque-increasing auxiliary control method for power downshift process of P2 hybrid power transmission |
| CN114763838B (en) * | 2021-01-11 | 2023-08-15 | 广州汽车集团股份有限公司 | Automobile gear shifting control method |
| CN114776801B (en) * | 2022-04-18 | 2024-03-22 | 哈尔滨东安汽车发动机制造有限公司 | Feedforward control method for clutch pressure in automatic transmission garage shifting |
-
2023
- 2023-09-19 CN CN202311209352.3A patent/CN117006241B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307269A (en) * | 2012-03-15 | 2013-09-18 | 通用汽车环球科技运作有限责任公司 | System and method for determining clutch gains in a transmission during a power downshift |
| CN108116400A (en) * | 2016-11-29 | 2018-06-05 | 丰田自动车株式会社 | The control device of vehicle driving apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117006241A (en) | 2023-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9227629B2 (en) | Method for operating a hybrid drive train of a vehicle | |
| CN110925417A (en) | Auxiliary control method for torque reduction in unpowered upshift process of P2 hybrid power transmission | |
| CN111536229B (en) | Gear-up control method for AT automatic transmission | |
| DE102006000380B4 (en) | A shift control apparatus and method for controlling an automatic transmission | |
| CN110040144B (en) | Gear shifting control method for hybrid power vehicle | |
| US8394000B2 (en) | Method for operating a vehicle drivetrain | |
| CN110949142A (en) | AMT gear shifting process control method | |
| US8364359B2 (en) | Control apparatus and method for automatic transmission | |
| US20140335996A1 (en) | Method for operating a drive train | |
| CN101832387A (en) | Gear switching control method of AMT (Automatic Mechanical Transmission) | |
| US11292472B2 (en) | Method and control device for operating a drivetrain | |
| CN114763838A (en) | Automobile gear shifting control method | |
| CN110925416A (en) | Torque-increasing auxiliary control method for power downshift process of P2 hybrid power transmission | |
| CN114776801B (en) | Feedforward control method for clutch pressure in automatic transmission garage shifting | |
| KR102059316B1 (en) | Method and apparatus for learning kiss point of transmission having dual clutch | |
| CN117006241B (en) | PID control method for clutch pressure in automatic transmission power downshifting process | |
| CN111706671B (en) | Vehicle gear shifting driving control method under no speed signal | |
| CN102203470B (en) | Method for controlling lock-up clutch of hydrodynamic torque converter | |
| CN105840807A (en) | Gear-shifting control method based on acceleration compensation | |
| CN109058451A (en) | A kind of automobile automatic shifting control method | |
| CN103946601B (en) | The control gear of automatic transmission | |
| CN112984099B (en) | Gear shifting control method for changing intention in unpowered gear-up process | |
| CN114439926B (en) | Synchronizer-free AMT downshift control method | |
| CN113074247B (en) | Gear shifting control method for changing intention in power gear shifting process | |
| CN114194177B (en) | Gear shifting torque control method for hybrid electric vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |