CN105221731A - A kind of backwash control strategy of automatic transmission VFS valve - Google Patents
A kind of backwash control strategy of automatic transmission VFS valve Download PDFInfo
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- CN105221731A CN105221731A CN201510676766.6A CN201510676766A CN105221731A CN 105221731 A CN105221731 A CN 105221731A CN 201510676766 A CN201510676766 A CN 201510676766A CN 105221731 A CN105221731 A CN 105221731A
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- vfs valve
- vfs
- steady state
- current
- valve
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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
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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
- F16H57/00—General details of gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
A backwash control strategy for automatic transmission VFS valve, it relates to a kind of automatic transmission control strategy field.The object of the invention is the problem that the VFS valve in order to solve existing automatic transmission cannot be shifted gears because contamination precipitation causes clamping stagnation.The present invention includes following steps: step one, control to obtain the steady state pressure of VFS valve to VFS valve, obtained the bound current of VFS valve by steady state pressure; Step 2, VFS valve is kept 5s in steady state pressure situation; The electric current of step 3, control VFS valve, the electric current of VFS valve is fluctuated between 0A and bound current, and wave time is at 1s; Step 4, control VFS valve periodically to be switched between step 2 and step 3 two states.Operating process of the present invention is simple, is applicable to the VFS valve of any automatic transmission.
Description
Technical field
The present invention relates to a kind of automatic transmission control strategy to have a taste of, specifically relate to a kind of backwash control strategy of automatic transmission VFS valve, belong to automatic transmission and control technical field.
Background technique
In the working procedure of automatic transmission, need combined by VFS valve controlled variator or be separated corresponding clutch or break to complete gear shift.When automatic transmission keeps a certain gear to work, the VFS valve work only having this gear corresponding is to regulate supply oil pressure, and other VFS valve is all in off working state.When the VFS valve being in off working state for a long time enters working state, namely become operating state from state of rest, VFS valve may cannot realize gear shift because the deposition of impurity causes clamping stagnation.If existing automatic transmission case VFS valve does not have self-cleaning function, when there is Block failure, VFS valve can only be pulled down from gearbox, carry out manual cleaning, extremely inconvenience.
Summary of the invention
The object of the invention is the problem that the VFS valve in order to solve existing automatic transmission cannot be shifted gears because contamination precipitation causes clamping stagnation.
Technological scheme of the present invention is: a kind of backwash control strategy of automatic transmission VFS valve, comprises the following steps:
Step one, the steady state pressure obtaining VFS valve is controlled to VFS valve, obtained the bound current of VFS valve by steady state pressure;
Step 2, VFS valve is kept 5s in steady state pressure situation;
The electric current of step 3, control VFS valve, makes its electric current fluctuate between 0A and described bound current or between bound current and 1A, and wave time is 1s;
Step 4, control VFS valve periodically to be switched between step 2 and step 3 two states.
Electric current and pressure do not have too large deviation, and small deviation is on control and performance not impact.Pressure performance be Current Control out.
The defining method of described steady state pressure comprises: make clutch transmission torque that this VFS valve is corresponding between 0Nm to 1Nm at the oil pressure on automatic transmission case control VFS valve oil road, choose 50% of oil circuit pressure value now as boundary Control steady state pressure.
The method being obtained the bound current of VFS valve by steady state pressure is comprised: according to " current-to-pressure " characteristic of VFS valve, under determining steady state, the bound current that steady state pressure value is corresponding.
When described steady state is for remaining unchanged by pwm signal control VFS valve electric current, VFS valve oil pressure pressure keeps state when stablizing.
The perturbation waveform of described electric current is the square wave of 10Hz, and the maximum current of square wave and minimum current are respectively bound current and 0A or 1A and bound current.When circuit current is with the cyclically-varying of 5s → 1s → 5s → 1s, cause pressure also along with cyclically-varying, with this periodically variable pressure, VFS valve is rinsed.
The present invention compared with prior art has following effect: the VFS valve of inoperative in automatic transmission is passed to periodically variable control electric current by control strategy of the present invention, VFSVFS valve can control on the border of operation interval to maintain lower oil pressure by this electric current, periodic oil charging-discharging is to rinse spool simultaneously, the VFS valve clamping stagnation preventing the deposition of impurity from causing, the inoperative VFS valve of control strategy method of the present invention to speed changer rinses, operating process is simple, is applicable to the VFS valve of any automatic transmission.
Accompanying drawing explanation
Fig. 1, normal low VFS valve policy control and oil pressure response schematic diagram, a is for controlling current waveform schematic diagram, and b is oil circuit pressure change schematic diagram;
Fig. 2, normal high VFS valve policy control and oil pressure response schematic diagram, a is for controlling current waveform schematic diagram, and b is oil circuit pressure change schematic diagram.
Embodiment
Embodiment one: 1 the specific embodiment of the present invention is described, the normal low valve of VFS of automatic transmission by reference to the accompanying drawings, its control procedure comprises:
1, the oil pressure of oil circuit control is carried out by the pwm signal VFS valve controlled in automatic transmission, gearbox is placed on stand, gantry motor provides the running of power maintenance certain stabilization of speed for transmission input shaft, control VFS valve slowly promotes controlled oil circuit oil pressure, corresponding clutch is changed to closed state gradually by open mode, detect the pressure of corresponding clutch when Motor torque is undergone mutation, when clutch transmission torque is in 0-1Nm, now oil pressure just compresses VFS clutch retraction springs that valve is controlled, measure the pressure of now return spring, the difference that the force value of described return spring designs because of automatic speed changing and different, need to obtain by experiment, the pressure of the return spring of present embodiment is 1bar, choose 50% of this force value for steady state pressure value.
2, according to " current-to-pressure " characteristic of VFS valve, existing electromagnetic valve current-method for testing pressure is utilized, under determining stable condition, the bound current that steady state pressure value is corresponding, the current value of this bound current, generally at about 0.1-0.3A, the bound current value of present embodiment is 0.2A.
3, the steady state pressure retention time keeps 5s, to ensure that the oil near VFS valve flows out whole oil circuit, controls electric current and stirs
4, the electric current of control VFS valve, makes its electric current fluctuate between 0A and described bound current, and the vibration frequency of this square wave is 10Hz, and the high/low currents of square wave is respectively bound current, 0A, and wave time is at 1s;
5, control VFS valve periodically switches between step 3 and step 4 two states.
Embodiment two: composition graphs 2 illustrates present embodiment, the difference of the present embodiment and embodiment one is: the bound current of VFS valve is between 0.9A to 1A, the electric current of control VFS valve fluctuates between bound current and 1A, vibration frequency is 10Hz, wave time is 1s, the bound current of present embodiment is 0.9A.
From Fig. 1 and Fig. 2, keep steady state pressure 5s, fluctuation 1s, periodically control, in the wave time of 1s, solenoid valve switches repeatedly at switch two states, produce vibration, impurity in solenoid valve passage is shaken off, carries out oil-filled in the steady state time of 5s, with oil, the oil with impurity near solenoid valve is washed from solenoid valve.
Claims (5)
1. a backwash control strategy for automatic transmission VFS valve, is characterized in that: comprise the following steps:
Step one, the steady state pressure obtaining VFS valve is controlled to VFS valve, obtained the bound current of VFS valve by steady state pressure;
Step 2, VFS valve is kept 5s in steady state pressure situation;
The electric current of step 3, control VFS valve, makes its electric current fluctuate between 0A and described bound current or between bound current and 1A, and wave time is 1s;
Step 4, control VFS valve periodically to be switched between step 2 and step 3 two states.
2. the backwash control strategy of a kind of automatic transmission VFS valve according to claim 1, it is characterized in that: the defining method of described steady state pressure comprises: make clutch transmission torque that this VFS valve is corresponding between 0Nm to 1Nm at the oil pressure on automatic transmission case control VFS valve oil road, choose 50% of oil circuit pressure value now as boundary Control steady state pressure.
3. the backwash control strategy of a kind of automatic transmission VFS valve according to claim 1, it is characterized in that: the described method being obtained the bound current of VFS valve by steady state pressure is comprised: according to " current-to-pressure " characteristic of VFS valve, under determining steady state, the bound current that steady state pressure value is corresponding.
4. the backwash control strategy of a kind of automatic transmission VFS valve according to claim 3, is characterized in that: when described steady state is for remaining unchanged by pwm signal controls VFS valve electric current, the state when maintenance of VFS valve oil pressure pressure is stablized.
5. the backwash control strategy of a kind of automatic transmission VFS valve according to claim 1, is characterized in that: the waveform of described VFS valve electric current is the square wave of 10Hz, and the maximum current of square wave and minimum current are respectively bound current and 0A or 1A and bound current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676766.6A CN105221731A (en) | 2015-10-13 | 2015-10-13 | A kind of backwash control strategy of automatic transmission VFS valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676766.6A CN105221731A (en) | 2015-10-13 | 2015-10-13 | A kind of backwash control strategy of automatic transmission VFS valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105221731A true CN105221731A (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510676766.6A Pending CN105221731A (en) | 2015-10-13 | 2015-10-13 | A kind of backwash control strategy of automatic transmission VFS valve |
Country Status (1)
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| CN (1) | CN105221731A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701720A (en) * | 2017-09-25 | 2018-02-16 | 上海汽车变速器有限公司 | The flush control method and system of wet dual clutch transmission clutch solenoid valve |
| CN109990016A (en) * | 2017-12-29 | 2019-07-09 | 长城汽车股份有限公司 | Wet dual clutch transmission rushes valve control method |
| CN111043304A (en) * | 2019-12-30 | 2020-04-21 | 盛瑞传动股份有限公司 | Automatic flushing control method for electromagnetic valve of clutch under P-gear mode of automatic transmission |
| CN112283341A (en) * | 2020-12-23 | 2021-01-29 | 北京航空航天大学 | Method for preventing electromagnetic valve of clutch of transmission in fixed gear from being blocked |
| CN114321483A (en) * | 2021-12-15 | 2022-04-12 | 浙江吉利控股集团有限公司 | Automatic control method for electromagnetic valve of clutch |
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| US5222417A (en) * | 1991-01-22 | 1993-06-29 | Fuji Jukogyo Kabushiki Kaisha | Hydraulic control system of an automatic transmission for a motor vehicle |
| CN1210215A (en) * | 1997-09-02 | 1999-03-10 | 本田技研工业株式会社 | Control system for automatic vehicle transmission |
| US6315692B1 (en) * | 1999-07-07 | 2001-11-13 | Honda Giken Kogyo Kabushiki Kaisha | Control apparatus for automatic transmission of vehicle |
| CN101096972A (en) * | 2006-06-27 | 2008-01-02 | 通用汽车公司 | Self cleaning logic valve assembly |
| CN102841550A (en) * | 2012-09-06 | 2012-12-26 | 安徽江淮汽车股份有限公司 | Washing control system for double-clutch automatic gearbox |
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2015
- 2015-10-13 CN CN201510676766.6A patent/CN105221731A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| US5222417A (en) * | 1991-01-22 | 1993-06-29 | Fuji Jukogyo Kabushiki Kaisha | Hydraulic control system of an automatic transmission for a motor vehicle |
| CN1210215A (en) * | 1997-09-02 | 1999-03-10 | 本田技研工业株式会社 | Control system for automatic vehicle transmission |
| US6315692B1 (en) * | 1999-07-07 | 2001-11-13 | Honda Giken Kogyo Kabushiki Kaisha | Control apparatus for automatic transmission of vehicle |
| CN101096972A (en) * | 2006-06-27 | 2008-01-02 | 通用汽车公司 | Self cleaning logic valve assembly |
| CN102841550A (en) * | 2012-09-06 | 2012-12-26 | 安徽江淮汽车股份有限公司 | Washing control system for double-clutch automatic gearbox |
Non-Patent Citations (1)
| Title |
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| 王迎: "重型车辆自动变速器液压操纵系统换挡过程研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701720A (en) * | 2017-09-25 | 2018-02-16 | 上海汽车变速器有限公司 | The flush control method and system of wet dual clutch transmission clutch solenoid valve |
| CN109990016A (en) * | 2017-12-29 | 2019-07-09 | 长城汽车股份有限公司 | Wet dual clutch transmission rushes valve control method |
| CN111043304A (en) * | 2019-12-30 | 2020-04-21 | 盛瑞传动股份有限公司 | Automatic flushing control method for electromagnetic valve of clutch under P-gear mode of automatic transmission |
| CN111043304B (en) * | 2019-12-30 | 2021-11-05 | 盛瑞传动股份有限公司 | Automatic flushing control method for electromagnetic valve of clutch under P-gear mode of automatic transmission |
| CN112283341A (en) * | 2020-12-23 | 2021-01-29 | 北京航空航天大学 | Method for preventing electromagnetic valve of clutch of transmission in fixed gear from being blocked |
| CN112283341B (en) * | 2020-12-23 | 2021-03-16 | 北京航空航天大学 | Method for preventing electromagnetic valve of clutch of transmission in fixed gear from being blocked |
| CN114321483A (en) * | 2021-12-15 | 2022-04-12 | 浙江吉利控股集团有限公司 | Automatic control method for electromagnetic valve of clutch |
| CN114321483B (en) * | 2021-12-15 | 2024-03-12 | 浙江吉利控股集团有限公司 | Automatic control method for clutch electromagnetic valve |
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Application publication date: 20160106 |