CN106812934A - A kind of CVT wet clutches hydraulic control system - Google Patents
A kind of CVT wet clutches hydraulic control system Download PDFInfo
- Publication number
- CN106812934A CN106812934A CN201510865212.0A CN201510865212A CN106812934A CN 106812934 A CN106812934 A CN 106812934A CN 201510865212 A CN201510865212 A CN 201510865212A CN 106812934 A CN106812934 A CN 106812934A
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- CN
- China
- Prior art keywords
- valve
- speed switch
- clutch
- pressure
- control system
- 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.)
- Pending
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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
- F16H61/02—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
- F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
-
- 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
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
-
- 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
- F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
- F16H2061/026—On-off solenoid valve
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
A kind of CVT wet clutches hydraulic control system, it advances and is controlled by clutch fluid pressure control system with the pressure of hydraulic oil in the piston cylinder of reverse clutch.The hydraulic control system can realize that the pressure of hydraulic system is automatically controlled, and can make the interior regulation of pressure certain limit of hydraulic system.Propose the multichannel hybrid driving method of high-speed switch valve in the design simultaneously, improve the switching characteristic of high-speed switch valve, can further improve the service behaviour of CVT wet clutches.
Description
Technical field
The present invention relates to a kind of CVT wet clutches hydraulic control system, it is adaptable to mechanical field.
Background technology
One of difficult point of buncher (CVT) control is clutch control in starting-up process, and its control targe not only needs to improve the ride comfort of starting-up process clutch engagement, reduces impact；And clutch slipping is reduced, extend clutch service life, while to ensure that engine stabilizer is operated, waste gas and noise pollution and the sensitivity of starting during reduction vehicle starting.If clutch engagement is too quickly, the stationarity of starting is not only destroyed, and cause the larger fluctuation of engine speed, or even cause engine to shake.Conversely, too reducing the engaging speed of clutch in order to improve starting, unit friction work will be greatly increased, so as to shorten its service life.Therefore, CVT wet clutches hydraulic control system needs to have two conditions：Can realize that the pressure of hydraulic system is automatically controlled；The pressure of hydraulic system can be adjusted within the specific limits.
The content of the invention
The present invention proposes a kind of CVT wet clutches hydraulic control system, can realize that the pressure of hydraulic system is automatically controlled, and can make the interior regulation of pressure certain limit of hydraulic system.Propose the multichannel hybrid driving method of high-speed switch valve in the design simultaneously, improve the switching characteristic of high-speed switch valve, can further improve the service behaviour of CVT wet clutches.
The technical solution adopted in the present invention is：
The pressure of hydraulic oil is controlled by clutch fluid pressure control system in the piston cylinder of the advance and reverse clutch.Servo valve and proportioning valve complex structure, high cost, and speed-sensitive switch valve regulation control pressure is selected in high-speed switch valve simple structure, cheap, antipollution and strong antijamming capability, therefore this example.When forward clutch or reverse clutch combination is needed, ECU sends control signal and gives speed-sensitive switch valve regulation control pressure, realizes clutch according to driver requested combination.
High-speed switch valve is although pressure adjustable, but larger flow cannot be exported, cannot be directly used to the control of clutch hydraulic cylinder, its outlet oil pressure is used to control the pressure of clutch control valve, and that the valve element of clutch control valve can do is larger, so as to export larger flow, the requirement that clutch control hydraulic cylinder quickly combines and be separate is met.
The high-speed switch valve uses pulse flow control mode, and most common of which adjusting method is pulse-width modulation type (PWM), is a kind of very effective method.But high-speed switching type valve is under common pulse-width signal (PWM) driving, and the unlatching of high-speed switch valve, shut-in time are long, and reaction is slow, have impact on the control performance of high-speed switch valve.Therefore multichannel combination drive technology has been used on the basis of common pulse-width signal (PWM), in a cycle for pulse-width signal, a larger accelerating potential was applied with before this, the operating voltage of slightly below rated value is switched to afterwards, the vibrating signal of certain amplitude it has been superimposed on the basis of the voltage simultaneously, the amplitude of accelerating potential and duration and operating voltage amplitude are preferred as the case may be.
When needing high-speed switch valve to open, apply about 1.5~2 times of accelerating potentials of rated operational voltage, high-speed switch electromagnetic valve is opened rapidly；High-speed switch electromagnetic valve breakdown action switches to 0.7~0.9 times of voltage of rated value after being basically completed, the opening of high-speed switch electromagnetic valve is maintained with less power consumption.
It is the 5%~15% of high-speed switch electromagnetic valve rated operational voltage to be superimposed amplitude on the basis of the maintenance voltage of stabilization simultaneously, and frequency is 1.2~2 times of electromagnetic core undamped natural frequency, and waveform can be the vibrating signal of sine wave, triangular wave etc..Vibrating signal is superimposed on the basis of the stabilization signal of high-speed switch electromagnetic valve can make valve element produce zitterbewegung, make between valve element and valve pocket stiction change into kinetic force of friction, further improve the sensitivity of high-speed switch electromagnetic valve opening and closing；And valve element often makees flutter by a small margin, the impurity that heap in its gap between valve pocket comes can be removed, reduce the probability that high-speed switch electromagnetic valve occurs bite.
The beneficial effects of the invention are as follows：Can realize that the pressure of hydraulic system is automatically controlled, and the interior regulation of pressure certain limit of hydraulic system can be made.Propose the multichannel hybrid driving method of high-speed switch valve in the design simultaneously, improve the switching characteristic of high-speed switch valve, can further improve the service behaviour of CVT wet clutches.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is clutch hydraulic pressure control system figure of the invention.
Fig. 2 is high-speed switch valve driving method of the invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, advance and controlled by clutch fluid pressure control system with the pressure of hydraulic oil in the piston cylinder of reverse clutch.Servo valve and proportioning valve complex structure, high cost, and speed-sensitive switch valve regulation control pressure is selected in high-speed switch valve simple structure, cheap, antipollution and strong antijamming capability, therefore this example.When forward clutch or reverse clutch combination is needed, ECU sends control signal and gives speed-sensitive switch valve regulation control pressure, realizes clutch according to driver requested combination.
High-speed switch valve is although pressure adjustable, but larger flow cannot be exported, cannot be directly used to the control of clutch hydraulic cylinder, its outlet oil pressure is used to control the pressure of clutch control valve, and that the valve element of clutch control valve can do is larger, so as to export larger flow, the requirement that clutch control hydraulic cylinder quickly combines and be separate is met.
Metal strips type stepless speed changer hydraulic actuator, it is made up of hydraulic pump l, proportional pressure control valve 2, direct acting pressure valve 3, proportional pressure-reducing valve 4, lubrication valve 5, hand-operated valve 6, reverse gear service valve 7, electromagnetic switch valve 8, clutch control valve 9, high-speed switch valve l0 etc., wherein direct acting pressure valve, hand-operated valve, reverse gear service valve, electromagnetic switch valve, clutch control valve, high-speed switch valve etc. constitute clutch fluid pressure control system.
When forward clutch combination is needed, manually valve hangs people's drive shift, it is intended to according to the operation of driver simultaneously, ECU sends control signal to high-speed switch valve, by the control strategy for setting in advance, pulse-width modulation PWM is carried out to high-speed switch valve, obtain a range of outlet oil pressure, its outlet oil pressure is used to control the pressure of clutch valve, and then controls the pressure of forward clutch hydraulic cylinder, realizes the starting of automobile balance.
When reverse clutch combination is needed, manually valve is hung people and is reversed gear, it is intended to according to the operation of driver simultaneously, ECU sends control signal to high-speed switch valve, by the control strategy for setting in advance, pulse-width modulation PWM is carried out to high-speed switch valve, obtain a range of outlet oil pressure, its outlet oil pressure is used to control the pressure of clutch valve, and then controls the pressure of reverse clutch hydraulic cylinder, realizes the starting of automobile balance.
As Fig. 2, high-speed switch valve use pulse flow control mode, most common of which adjusting method is pulse-width modulation type (PWM), is a kind of very effective method.But high-speed switching type valve is under common pulse-width signal (PWM) driving, and the unlatching of high-speed switch valve, shut-in time are long, and reaction is slow, have impact on the control performance of high-speed switch valve.Therefore multichannel combination drive technology has been used on the basis of common pulse-width signal (PWM), in a cycle for pulse-width signal, a larger accelerating potential was applied with before this, the operating voltage of slightly below rated value is switched to afterwards, the vibrating signal of certain amplitude it has been superimposed on the basis of the voltage simultaneously, the amplitude of accelerating potential and duration and operating voltage amplitude are preferred as the case may be.
When needing high-speed switch valve to open, apply about 1.5~2 times of accelerating potentials of rated operational voltage, high-speed switch electromagnetic valve is opened rapidly；High-speed switch electromagnetic valve breakdown action switches to 0.7~0.9 times of voltage of rated value after being basically completed, the opening of high-speed switch electromagnetic valve is maintained with less power consumption.
It is the 5%~15% of high-speed switch electromagnetic valve rated operational voltage to be superimposed amplitude on the basis of the maintenance voltage of stabilization simultaneously, and frequency is 1.2~2 times of electromagnetic core undamped natural frequency, and waveform can be the vibrating signal of sine wave, triangular wave etc..Vibrating signal is superimposed on the basis of the stabilization signal of high-speed switch electromagnetic valve can make valve element produce zitterbewegung, make between valve element and valve pocket stiction change into kinetic force of friction, further improve the sensitivity of high-speed switch electromagnetic valve opening and closing；And valve element often makees flutter by a small margin, the impurity that heap in its gap between valve pocket comes can be removed, reduce the probability that high-speed switch electromagnetic valve occurs bite.
Claims (5)
1. a kind of CVT wet clutches hydraulic control system, it is characterized in that：The pressure of hydraulic oil is controlled by clutch fluid pressure control system in the piston cylinder of the advance and reverse clutch, when forward clutch or reverse clutch combination is needed, ECU sends control signal and gives speed-sensitive switch valve regulation control pressure, realizes clutch according to driver requested combination.
2. a kind of CVT wet clutches hydraulic control system according to claim 1, it is characterized in that：The high-speed switch valve is although pressure adjustable, but larger flow cannot be exported, cannot be directly used to the control of clutch hydraulic cylinder, its outlet oil pressure is used to control the pressure of clutch control valve, and that the valve element of clutch control valve can do is larger, so as to export larger flow, the requirement that clutch control hydraulic cylinder quickly combines and be separate is met.
3. a kind of CVT wet clutches hydraulic control system according to claim 1, it is characterized in that：The high-speed switch valve uses pulse flow control mode, most common of which adjusting method is pulse-width modulation type (PWM), it is a kind of very effective method, but high-speed switching type valve is under common pulse-width signal (PWM) driving, the unlatching of high-speed switch valve, shut-in time are long, reaction is slow, have impact on the control performance of high-speed switch valve.
4. a kind of CVT wet clutches hydraulic control system according to claim 1, it is characterized in that：When needing high-speed switch valve to open, apply about 1.5~2 times of accelerating potentials of rated operational voltage, high-speed switch electromagnetic valve is opened rapidly；High-speed switch electromagnetic valve breakdown action switches to 0.7~0.9 times of voltage of rated value after being basically completed, the opening of high-speed switch electromagnetic valve is maintained with less power consumption.
5. a kind of CVT wet clutches hydraulic control system according to claim 1, it is characterized in that：Vibrating signal is superimposed on the basis of the stabilization signal of high-speed switch electromagnetic valve can make valve element produce zitterbewegung, make between valve element and valve pocket stiction change into kinetic force of friction, further improve the sensitivity of high-speed switch electromagnetic valve opening and closing；And valve element often makees flutter by a small margin, the impurity that heap in its gap between valve pocket comes can be removed, reduce the probability that high-speed switch electromagnetic valve occurs bite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865212.0A CN106812934A (en) | 2015-12-01 | 2015-12-01 | A kind of CVT wet clutches hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865212.0A CN106812934A (en) | 2015-12-01 | 2015-12-01 | A kind of CVT wet clutches hydraulic control system |
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| Publication Number | Publication Date |
|---|---|
| CN106812934A true CN106812934A (en) | 2017-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510865212.0A Pending CN106812934A (en) | 2015-12-01 | 2015-12-01 | A kind of CVT wet clutches hydraulic control system |
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| Country | Link |
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| CN (1) | CN106812934A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040083A (en) * | 2018-01-16 | 2019-07-23 | 宝沃汽车（中国）有限公司 | Condition detection method, device, cloud server and the vehicle of clutch oil |
| CN111902645A (en) * | 2018-03-19 | 2020-11-06 | 五十铃自动车株式会社 | Clutch control device |
-
2015
- 2015-12-01 CN CN201510865212.0A patent/CN106812934A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040083A (en) * | 2018-01-16 | 2019-07-23 | 宝沃汽车（中国）有限公司 | Condition detection method, device, cloud server and the vehicle of clutch oil |
| CN111902645A (en) * | 2018-03-19 | 2020-11-06 | 五十铃自动车株式会社 | Clutch control device |
| US11199230B2 (en) | 2018-03-19 | 2021-12-14 | Isuzu Motors Limited | Clutch control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |
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| WD01 | Invention patent application deemed withdrawn after publication |