CN106812937A - A kind of planetary gear power dividing type stepless speed variator hydraulic control system - Google Patents
A kind of planetary gear power dividing type stepless speed variator hydraulic control system Download PDFInfo
- Publication number
- CN106812937A CN106812937A CN201510865275.6A CN201510865275A CN106812937A CN 106812937 A CN106812937 A CN 106812937A CN 201510865275 A CN201510865275 A CN 201510865275A CN 106812937 A CN106812937 A CN 106812937A
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- China
- Prior art keywords
- valve
- planetary gear
- control system
- type stepless
- stepless speed
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
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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
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
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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
- F16H2718/00—Mechanisms for speed-change of planetary gearing, the speed change control being dependent on function parameters of the gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Transmission Device (AREA)
Abstract
A kind of planetary gear power dividing type stepless speed variator hydraulic control system, by quantitative oil pump fuel feeding, there are 5 clutch cylinders and 1 brake cylinder in executing agency, and controlling to adjust device has 1 hand control valve, 3 shift valves, 1 ratio electromagnetic relief valve, 2 digital valves and 2 solenoid directional control valves.The system architecture is simple, can automatically adapt to the size that speed changer transmits torque, and starting and gearshift are steady, is that solid foundation has been established in the practical exploitation without V belt translation planetary gear power dividing type stepless speed variator.
Description
Technical field
The present invention relates to a kind of planetary gear power dividing type stepless speed variator hydraulic control system, it is adaptable to mechanical field.
Background technology
Buncher (CVT) is a kind of automatic transmission for vehicles that can automatically continuously change gearratio, it can realize the best match of engine, speed changer and road load, effectively improve dynamic property, the fuel consumption and emission performance of vehicle, improve the property easy to operate of driver and the riding comfort of passenger, have the advantages that common step speed change transmission cannot be compared with other automatic transmission.But the torque that general metal band type stepless speed variator can be transmitted is smaller, and transmission efficiency is not also high, and particularly V belt translation efficiency is influenceed larger by the change of vehicle working condition, therefore, its application be subject to certain restrictions mouth-.At present, at home and abroad many well-known universities have all carried out a kind of new work transmission --- the theoretical research work of power dividing type stepless speed variator, it plays respective advantage as much as possible by application power dividing principle and gear drive and the combination of belt-type stepless speed control apparatus, realizes good vehicle performance and the ratio of performance to price higher.
The content of the invention
The present invention proposes a kind of planetary gear power dividing type stepless speed variator hydraulic control system, the system architecture is simple, the size that speed changer transmits torque can automatically be adapted to, starting and gearshift are steady, are that solid foundation has been established in the practical exploitation without V belt translation planetary gear power dividing type stepless speed variator.
The technical solution adopted in the present invention is：
The planetary gear power dividing type stepless speed variator hydraulic control system is by quantitative oil pump fuel feeding, there are 5 clutch cylinders and 1 brake cylinder in executing agency, and controlling to adjust device has 1 hand control valve, 3 shift valves, 1 ratio electromagnetic relief valve, 2 digital valves and 2 solenoid directional control valves.
The gearshift of speed changer is controlled by hand control valve and control unit ECU, and ECU sends instruction makes magnetic valve A, B obtain power failure state in different, you can realize the gearshift of basic gear.Hand control valve when P gears and N keep off, all clutch cylinders and brake cylinder fluid oil return box, each clutch is without action of hydraulic force, power interruption transmission.Hand control valve when D keeps off, connect low speed off speed, high speed A and connect gear and variable speed gear by magnetic valve A, B combination control, now, respective clutch cylinder, brake cylinder work, other clutch cylinders and the equal oil return box of brake cylinder fluid, it is ensured that motion is not in relating to.When R keeps off, clutch C, cylinder and brake cylinder work hand control valve, other equal oil return boxes of clutch cylinder fluid.
The start clutch cylinder is by digital valve control, by a digital valve, (two-position three way high-speed switch valve is arranged on the in-line of start clutch cylinder, transmission control unit ECU output duty cycles signal is to digital valve during starting, controlled average discharge and pressure into people's start clutch cylinder, dutyfactor value gradually increases, the oil pressure of start clutch cylinder is also gradually increased, the engaging force of start clutch is changed from small to big, it is ensured that the gentle start of automobile.Clutch C：Cylinder is also by digital valve control, when entering variable speed gear after vehicle starting or being kept off into variable speed by high speed direct gear, the transmission control unit ECU duty cycle signals that change from small to big of output are to digital valve, make clutch c, the oil pressure of cylinder gradually increases, the engaging force of clutch changes from small to big, it is ensured that the smooth transition of gearshift.And when automobile changes to high speed direct gear by variable speed gear, transmission control unit ECU outputs duty cycle signals from large to small make clutch C to digital valve：The oil pressure of cylinder is gradually reduced, and the engaging force of clutch from large to small, also ensure that the smooth transition of gearshift.
The control system working connection pressure is set up by ratio electromagnetic relief valve, and the guide Yan of the valve is the electro-hydraulic proportional valve of PWM controls.Transmission control unit ECU is according to the parameter determination such as engine speed, speed, throttle position gear and the torque of required transmission, output duty cycle signal is to electro-hydraulic proportional valve, make working connection pressure adjusted, associated clutch, the thrust of brake also change therewith, the need for meeting the different torques of transmission.
The beneficial effects of the invention are as follows：The system architecture is simple, can automatically adapt to the size that speed changer transmits torque, and starting and gearshift are steady, is that solid foundation has been established in the practical exploitation without V belt translation planetary gear power dividing type stepless speed variator.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is planetary gear power dividing type stepless speed variator hydraulic control system schematic diagram of the invention.
In figure：1. start clutch；2. digital valve 1；3. hand control valve；4. ratio electromagnetic relief valve；5. clutch C4；6. clutch C3；7. clutch C2；8. clutch C1；9. brake B；10. digital valve 2；11. shift valves 1；12. magnetic valve B；13. magnetic valve A；14. shift valves 2；15. shift valves 3.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, planetary gear power dividing type stepless speed variator hydraulic control system is by quantitative oil pump fuel feeding, there are 5 clutch cylinders and 1 brake cylinder in executing agency, and controlling to adjust device has 1 hand control valve, 3 shift valves, 1 ratio electromagnetic relief valve, 2 digital valves and 2 solenoid directional control valves.
The gearshift of speed changer is controlled by hand control valve and control unit ECU, and ECU sends instruction makes magnetic valve A, B obtain power failure state in different, you can realize the gearshift of basic gear.Hand control valve when P gears and N keep off, all clutch cylinders and brake cylinder fluid oil return box, each clutch is without action of hydraulic force, power interruption transmission.Hand control valve when D keeps off, connect low speed off speed, high speed A and connect gear and variable speed gear by magnetic valve A, B combination control, now, respective clutch cylinder, brake cylinder work, other clutch cylinders and the equal oil return box of brake cylinder fluid, it is ensured that motion is not in relating to.When R keeps off, clutch C, cylinder and brake cylinder work hand control valve, other equal oil return boxes of clutch cylinder fluid.
Start clutch cylinder is by digital valve control, by a digital valve, (two-position three way high-speed switch valve is arranged on the in-line of start clutch cylinder, transmission control unit ECU output duty cycles signal is to digital valve during starting, controlled average discharge and pressure into people's start clutch cylinder, dutyfactor value gradually increases, the oil pressure of start clutch cylinder is also gradually increased, the engaging force of start clutch is changed from small to big, it is ensured that the gentle start of automobile.Clutch C：Cylinder is also by digital valve control, when entering variable speed gear after vehicle starting or being kept off into variable speed by high speed direct gear, the transmission control unit ECU duty cycle signals that change from small to big of output are to digital valve, make clutch c, the oil pressure of cylinder gradually increases, the engaging force of clutch changes from small to big, it is ensured that the smooth transition of gearshift.And when automobile changes to high speed direct gear by variable speed gear, transmission control unit ECU outputs duty cycle signals from large to small make clutch C to digital valve：The oil pressure of cylinder is gradually reduced, and the engaging force of clutch from large to small, also ensure that the smooth transition of gearshift.
Control system working connection pressure is set up by ratio electromagnetic relief valve, and the guide Yan of the valve is the electro-hydraulic proportional valve of PWM controls.Transmission control unit ECU is according to the parameter determination such as engine speed, speed, throttle position gear and the torque of required transmission, output duty cycle signal is to electro-hydraulic proportional valve, make working connection pressure adjusted, associated clutch, the thrust of brake also change therewith, the need for meeting the different torques of transmission.
Claims (6)
1. a kind of planetary gear power dividing type stepless speed variator hydraulic control system, it is characterized in that：The planetary gear power dividing type stepless speed variator hydraulic control system is by quantitative oil pump fuel feeding, there are 5 clutch cylinders and 1 brake cylinder in executing agency, and controlling to adjust device has 1 hand control valve, 3 shift valves, 1 ratio electromagnetic relief valve, 2 digital valves and 2 solenoid directional control valves.
2. a kind of planetary gear power dividing type stepless speed variator hydraulic control system according to claim 1, it is characterized in that：The gearshift of speed changer is controlled by hand control valve and control unit ECU, and ECU sends instruction makes magnetic valve A, B obtain power failure state in different, you can realize the gearshift of basic gear.
3. a kind of planetary gear power dividing type stepless speed variator hydraulic control system according to claim 1, it is characterized in that：The hand control valve when P gears and N keep off, all clutch cylinders and brake cylinder fluid oil return box, each clutch is without action of hydraulic force, power interruption transmission.
4. a kind of planetary gear power dividing type stepless speed variator hydraulic control system according to claim 1, it is characterized in that：The start clutch cylinder is by digital valve control, by a digital valve, (two-position three way high-speed switch valve is arranged on the in-line of start clutch cylinder, transmission control unit ECU output duty cycles signal is to digital valve during starting, controlled average discharge and pressure into people's start clutch cylinder, dutyfactor value gradually increases, the oil pressure of start clutch cylinder is also gradually increased, the engaging force of start clutch is changed from small to big, it is ensured that the gentle start of automobile.
5. a kind of planetary gear power dividing type stepless speed variator hydraulic control system according to claim 1, it is characterized in that：The control system working connection pressure is set up by ratio electromagnetic relief valve, and the guide Yan of the valve is the electro-hydraulic proportional valve of PWM controls.
6. a kind of planetary gear power dividing type stepless speed variator hydraulic control system according to claim 1, it is characterized in that：The transmission control unit ECU is according to the parameter determination such as engine speed, speed, throttle position gear and the torque of required transmission, output duty cycle signal is to electro-hydraulic proportional valve, make working connection pressure adjusted, associated clutch, the thrust of brake also change therewith, the need for meeting the different torques of transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865275.6A CN106812937A (en) | 2015-12-01 | 2015-12-01 | A kind of planetary gear power dividing type stepless speed variator hydraulic control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510865275.6A CN106812937A (en) | 2015-12-01 | 2015-12-01 | A kind of planetary gear power dividing type stepless speed variator hydraulic control system |
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| CN106812937A true CN106812937A (en) | 2017-06-09 |
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| CN201510865275.6A Pending CN106812937A (en) | 2015-12-01 | 2015-12-01 | A kind of planetary gear power dividing type stepless speed variator hydraulic control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583273A (en) * | 2018-03-27 | 2018-09-28 | 郑州智驱科技有限公司 | A kind of gear speed change electricity drive bridge of integrated form two of having electronic parking |
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2015
- 2015-12-01 CN CN201510865275.6A patent/CN106812937A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583273A (en) * | 2018-03-27 | 2018-09-28 | 郑州智驱科技有限公司 | A kind of gear speed change electricity drive bridge of integrated form two of having electronic parking |
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Application publication date: 20170609 |