CN201081011Y - Metal strips type stepless speed changer hydraulic system - Google Patents
Metal strips type stepless speed changer hydraulic system Download PDFInfo
- Publication number
- CN201081011Y CN201081011Y CNU2007200461304U CN200720046130U CN201081011Y CN 201081011 Y CN201081011 Y CN 201081011Y CN U2007200461304 U CNU2007200461304 U CN U2007200461304U CN 200720046130 U CN200720046130 U CN 200720046130U CN 201081011 Y CN201081011 Y CN 201081011Y
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- hydraulic system
- servopump
- oil cylinder
- clamping force
- control
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Abstract
The utility model relates to an automobile continuously variable transmission hydraulic system, in particular to a metal pushing belt type continuously variable transmission hydraulic system which comprises a driving gear movable part and an oil cylinder thereof, a driven gear movable part and an oil cylinder thereof and an oil tank; the utility model also comprises a speed ratio control servopump and a clamping force control servopump. One end of the speed ratio control servopump is connected with the oil cylinder of the driving gear, and the other end is connected with the oil tank; one end of the clamping force control servopump is connected with the oil cylinder of the driven gear, and the other end is connected with the oil tank. The utility model has the advantages of simple structure, high efficiency of the hydraulic system and good control quality, can accurately control the clamping force and the speed ratio of the metal pushing belt type continuously variable transmission, and improve fuel economy and power performance of an automobile.
Description
Technical field
The utility model relates to a kind of auto continuously variable transmission hydraulic system, a kind of specifically metal band type stepless speed variator hydraulic system.
Background technique
Metal band type stepless speed variator is a kind of high-tech product, hydraulic system is the important component part of metal band type stepless speed variator, the early stage mechanical-hydraulic control mechanism that adopts, can not independently control the pressure of driven wheel oil cylinder owing to exist, control strategy is simple, the requirement of different driving cycles be can not satisfy, any, the accurately control of clamping force and speed ratio are difficult to realize.In the metal current variable v-belt drive hydraulic actuator, the pressure of driven wheel oil cylinder is waited by high-speed switch valve and controls, and the meeting flow is less, controlling performance is relatively poor; By high-speed switch valve by pressure valve wait control can make complex structure, reflection is slow and be more vulnerable to other factors disturbs; Wait to control by electromagnetic proportional valve and can realize the continuously accurately pressure of the driving and driven belt wheel oil cylinder of control metal band type stepless speed variator.But above-mentioned several controlling schemes all exists the inefficient problem of hydraulic system.Because existing metal band type stepless speed variator hydraulic system is used by engine-driven metering pump, a large amount of hydraulic oil are directly got back to fuel tank again from the fuel tank to the system, make hydraulic system produce very big power loss; Simultaneously, when engine speed is low, can cause that again the effective coverage that pressure valve can be regulated reduces, influence the service behaviour of metal band type stepless speed variator.
Summary of the invention
The purpose of this utility model is to propose a kind of simple in structure, hydraulic system efficient height, controlling performance is better, clamping force, the speed ratio of metal band type stepless speed variator be can accurately control, the fuel economy of automobile, the metal band type stepless speed variator hydraulic system of power character improved.
The purpose of this utility model can be achieved through the following technical solutions:
The metal band type stepless speed variator hydraulic system, comprise driving wheel moving element and oil cylinder thereof, follower moving element and oil cylinder thereof, fuel tank, also comprise Transmission Ratio Control servopump and clamping force control servopump, Transmission Ratio Control servopump one end and driving wheel oil cylinder join, the other end and fuel tank join, clamping force control servopump one end and follower oil cylinder join, and the other end and fuel tank join.
The purpose of this utility model can also further realize by following technical measures:
Aforesaid metal band type stepless speed variator hydraulic system, wherein said Transmission Ratio Control servopump are the metering pumps of the driven by servomotor of band feedback control.
Aforesaid metal band type stepless speed variator hydraulic system, the metering pump of the driven by servomotor of wherein said clamping force control servopump band feedback control.
Advantage of the present utility model is: because the utility model has adopted clamping force control servopump, Transmission Ratio Control servopump, servopump can satisfy the requirement of stepless speed variator hydraulic system pressure and flow fully, reduced requirement, reduced requirement high precision components to high-precision valve and hole.Servopump control continuously variable transmission device hydraulic system significantly reduces manufacture cost, reduces loop and valve, has simplified transmission device.Finish target by essential pressure and the flow of servopump control running stepless speed variator hydraulic system, improved hydraulic system efficient.The clamping force of servopump hydraulic control system and Transmission Ratio Control have improved the control performance to clamping force and speed ratio owing to solved in other controlling schemes by what of engine speed decision hydraulic system fuel delivery the negative effect of control system and the narrow limitation of various pressure valve.Good effect of the present utility model is that structure is simpler, hydraulic system efficient height, controlling performance are better, can accurately control clamping force, the speed ratio of metal band type stepless speed variator, improves fuel economy, the power character of automobile.
Description of drawings
Fig. 1 is the utility model embodiment one a structural representation.
Embodiment
Embodiment one
The structure of present embodiment as shown in Figure 1, a kind of metal band type stepless speed variator hydraulic system, comprise driving wheel moving element 1, follower moving element 2, driving wheel oil cylinder 3, follower oil cylinder 4, fuel tank 7, also comprise Transmission Ratio Control servopump 6 and clamping force control servopump 5, they all are the metering pumps of the driven by servomotor of band feedback control, Transmission Ratio Control servopump 6 one ends join by oil pipe and driving wheel oil cylinder 3, and the other end joins by oil pipe and fuel tank 7.Clamping force control servopump 5 one ends join by oil pipe and follower oil cylinder 4, and the other end joins by oil pipe and fuel tank 7.
At the various operation conditionss of automobile, the control unit of metal band type stepless speed variator is gathered relevant signal in real time, calculate the target clamping force, with the target clamping force is target, by the clamping force of clamping force control servopump 5 being controlled the pulsewidth modulation of driven by servomotor signal, driving clamping force control servopump 5 speed changes by clamping force control actuating motor rotates, realization is charged pressure oil or head pressure oil in metal band type stepless speed variator driven pulley oil cylinder 4, can accurately control the pressure of metal band type stepless speed variator driven pulley oil cylinder 4 continuously, reach the requirement of metal band type stepless speed variator follower clamping force fast, guaranteeing has enough frictional force between metal tape and belt wheel, reliably transmitting torque.
At the various operation conditionss of automobile, the control unit of metal band type stepless speed variator is gathered relevant signal in real time, coupling requirement according to motor and transmission system, calculate goals ratio, to realize the master of goals ratio, follower clamping force ratio is target, by pulsewidth modulation to the Transmission Ratio Control driven by servomotor signal of Transmission Ratio Control servopump 6, driving Transmission Ratio Control servopump 6 speed changes by the Transmission Ratio Control actuating motor rotates, realization is charged pressure oil or head pressure oil in metal band type stepless speed variator driving pulley oil cylinder 3, can accurately control the pressure of metal band type stepless speed variator driving pulley oil cylinder 3 continuously, change main, the clamping force ratio of follower, make the master, the operating radius of follower changes on demand continuously, realizes the accurate continuous control to the velocity ratio of metal band type stepless speed variator.
The utility model can also have other mode of execution, and the technological scheme that equal replacement of all employings or equivalent transformation form all drops within the claimed scope of the utility model.
Claims (3)
1. metal band type stepless speed variator hydraulic system, comprise driving wheel moving element and oil cylinder thereof, follower moving element and oil cylinder thereof, fuel tank, it is characterized in that: also comprise Transmission Ratio Control servopump and clamping force control servopump, described Transmission Ratio Control servopump one end and driving wheel oil cylinder join, the other end and fuel tank join, described clamping force control servopump one end and follower oil cylinder join, and the other end and fuel tank join.
2. metal band type stepless speed variator hydraulic system as claimed in claim 1 is characterized in that: described Transmission Ratio Control servopump is the metering pump of the driven by servomotor of band feedback control.
3. metal band type stepless speed variator hydraulic system as claimed in claim 1 is characterized in that: the metering pump of the driven by servomotor of described clamping force control servopump band feedback control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200461304U CN201081011Y (en) | 2007-09-26 | 2007-09-26 | Metal strips type stepless speed changer hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200461304U CN201081011Y (en) | 2007-09-26 | 2007-09-26 | Metal strips type stepless speed changer hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201081011Y true CN201081011Y (en) | 2008-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200461304U Expired - Lifetime CN201081011Y (en) | 2007-09-26 | 2007-09-26 | Metal strips type stepless speed changer hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201081011Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201537A (en) * | 2010-11-08 | 2013-07-10 | 洋马株式会社 | Belt type stepless transmission |
| CN106286745A (en) * | 2016-08-16 | 2017-01-04 | 江苏三能动力总成有限公司 | A kind of variable gear ratio mechanical supercharger |
| CN108443492A (en) * | 2018-04-03 | 2018-08-24 | 湘潭大学 | A kind of hydraulic mechanical stepless gearbox speed-ratio regulation device |
| CN108506482A (en) * | 2018-04-03 | 2018-09-07 | 湘潭大学 | A kind of hydraulic mechanical stepless gearbox speed-ratio regulation automatic control device |
| CN108533707A (en) * | 2018-07-09 | 2018-09-14 | 湖南科技大学 | A kind of continuously variable transmission device and electric vehicle for electric vehicle |
| CN110578796A (en) * | 2018-06-08 | 2019-12-17 | 舍弗勒技术股份两合公司 | Hydraulic system |
| CN111636993A (en) * | 2020-06-05 | 2020-09-08 | 合肥工业大学 | Speed-increasing and speed-stabilizing system for ocean current power generation system and speed-increasing and speed-stabilizing method thereof |
| CN114087356A (en) * | 2021-11-25 | 2022-02-25 | 柳州赛克科技发展有限公司 | Oil pressure closed-loop control method and system for continuously variable transmission system |
-
2007
- 2007-09-26 CN CNU2007200461304U patent/CN201081011Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201537A (en) * | 2010-11-08 | 2013-07-10 | 洋马株式会社 | Belt type stepless transmission |
| CN103201537B (en) * | 2010-11-08 | 2016-01-13 | 洋马株式会社 | Belt-type Adjustable-speed machine |
| CN106286745A (en) * | 2016-08-16 | 2017-01-04 | 江苏三能动力总成有限公司 | A kind of variable gear ratio mechanical supercharger |
| CN108443492A (en) * | 2018-04-03 | 2018-08-24 | 湘潭大学 | A kind of hydraulic mechanical stepless gearbox speed-ratio regulation device |
| CN108506482A (en) * | 2018-04-03 | 2018-09-07 | 湘潭大学 | A kind of hydraulic mechanical stepless gearbox speed-ratio regulation automatic control device |
| CN110578796A (en) * | 2018-06-08 | 2019-12-17 | 舍弗勒技术股份两合公司 | Hydraulic system |
| CN108533707A (en) * | 2018-07-09 | 2018-09-14 | 湖南科技大学 | A kind of continuously variable transmission device and electric vehicle for electric vehicle |
| CN111636993A (en) * | 2020-06-05 | 2020-09-08 | 合肥工业大学 | Speed-increasing and speed-stabilizing system for ocean current power generation system and speed-increasing and speed-stabilizing method thereof |
| CN111636993B (en) * | 2020-06-05 | 2021-08-24 | 合肥工业大学 | Speed-increasing and speed-stabilizing system for ocean current power generation system and speed-increasing and speed-stabilizing method thereof |
| CN114087356A (en) * | 2021-11-25 | 2022-02-25 | 柳州赛克科技发展有限公司 | Oil pressure closed-loop control method and system for continuously variable transmission system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080702 |
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| CX01 | Expiry of patent term |