CN202612588U - Hydraulic gear-shifting control system for double clutch transmission - Google Patents
Hydraulic gear-shifting control system for double clutch transmission Download PDFInfo
- Publication number
- CN202612588U CN202612588U CN2011205629897U CN201120562989U CN202612588U CN 202612588 U CN202612588 U CN 202612588U CN 2011205629897 U CN2011205629897 U CN 2011205629897U CN 201120562989 U CN201120562989 U CN 201120562989U CN 202612588 U CN202612588 U CN 202612588U
- Authority
- CN
- China
- Prior art keywords
- valve
- mechanical commutation
- shift fork
- gear
- mechanical
- 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.)
- Expired - Fee Related
Links
Images
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
- F16H61/68—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 specially adapted for stepped gearings
- F16H61/684—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 specially adapted for stepped gearings without interruption of drive
- F16H61/688—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 specially adapted for stepped gearings without interruption of drive with two inputs, e.g. selection of one of two torque-flow paths by 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/2807—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted using electric control signals for shift actuators, e.g. electro-hydraulic control therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
A hydraulic gear-shifting control system for a double clutch transmission is used for achieving the control for a transmission gear-shifting mechanism. The hydraulic gear-shifting control system includes an oil tank, a filter, an oil pump, an overflow valve, a hydraulic gear-shifting control oil circuit and other control oil circuits. The system is characterized in that: a hydraulic module of the hydraulic gear-shifting control oil circuit includes a proportional pressure control electromagnetic valve, an electromagnetic switch valve, electromagnetic reversing valves (A and B), mechanical reversing valves (A, B, C, and D), and four fork piston cylinders, wherein the electromagnetic switch valve and the proportional pressure control electromagnetic valve are connected in the hydraulic gear-shifting control oil circuit, the proportional pressure control electromagnetic valve is connected with the electromagnetic reversing valve A and the electromagnetic reversing valve B, the electromagnetic reversing valve A is connected with the mechanical reversing valve A and the mechanical reversing valve B, the electromagnetic reversing valve B is connected with the mechanical reversing valve C and the mechanical reversing valve D, and the mechanical reversing valve A, B, C and D are respectively connected with the corresponding fork piston cylinders. According to the hydraulic gear-shifting control system, the number of the electromagnetic valves is reduced, and the control precision is improved on the basis of reducing the production cost of the hydraulic module.
Description
Technical field
The utility model relates to a kind of hydraulic control system, is particularly useful for the hydraulic pressure shifting control system of automobile double clutch speed changer, belongs to the mechanical engineering technical field of hydraulic elements.
Background technique
Automotive transmission is divided into manual transmission and two kinds of forms of automatic transmission, and the advantage of manual transmission is that response is fast, oil consumption is low, but the not enough Energy and comfort of driver's operation; Though the automatic transmission of traditional form has satisfied people to making things convenient for the pursuit of comfort property, kinaestheic is undesirable, and Economy is relatively poor.The double-clutch speed changer that both advantages combine can be accomplished gear shift in the short time at the utmost point; Make transmission of power uninterrupted; For the driver provides Energy and comfort, has had dynamic driving experience; Can inherit simultaneously existing manual transmission production and the resource that technology drops into, receive both at home and abroad the attention of each big car load producer gradually, become the target of automotive transmission industry new-product development.The hydraulic control system of double-clutch speed changer has adopted the break-make of a large amount of switch electromagnetic valve control oil channel at present, accomplishes commutation function by multi-way valve, and it is indeterminate to exist the gearshift strategy, defectives such as control accuracy difference and manufacture cost height.
The model utility content
The purpose of the utility model is the drawback to existing technology, provides a kind of gearshift strategy clear and definite, gear precise control, safe and reliable, and cost drops into low double-clutch speed changer hydraulic pressure shifting control system.
The said problem of the utility model realizes with following technical proposals:
A kind of double-clutch speed changer hydraulic pressure shifting control system; Comprise fuel tank, filter cleaner, oil pump, relief valve, hydraulic pressure gear shift control oil circuit and other control oil channel in the formation; It is characterized in that; Hydraulic module comprises ratio pressure adjusting solenoid valve, electromagnetic switch valve, solenoid directional control valve A, solenoid directional control valve B, mechanical commutation valve A, mechanical commutation valve B, mechanical commutation valve C, mechanical commutation valve D and four shift fork piston cylinders in the said hydraulic pressure gear shift control oil circuit; Said electromagnetic switch valve and ratio pressure are regulated solenoid valve and are connected in the hydraulic pressure gear shift control working connection; Said ratio pressure is regulated solenoid valve and is connected solenoid directional control valve A, solenoid directional control valve B; Said solenoid directional control valve A connects mechanical selector valve A, mechanical commutation valve B, and said solenoid directional control valve B connects mechanical selector valve C, mechanical commutation valve D, and said mechanical commutation valve A, mechanical commutation valve B, mechanical commutation valve C, mechanical commutation valve D are connected with pairing shift fork piston cylinder respectively.
Above-mentioned double-clutch speed changer hydraulic pressure shifting control system, said solenoid directional control valve A, solenoid directional control valve B are the 3-position-3-way selector valve.
Above-mentioned double-clutch speed changer hydraulic pressure shifting control system,, said mechanical commutation valve A, mechanical commutation valve B, mechanical commutation valve C, mechanical commutation valve D are two-position four way change valve.
Above-mentioned double-clutch speed changer hydraulic pressure shifting control system; Said four shift fork piston cylinders are respectively one/third gear shift fork piston cylinder, five grades of shift fork piston cylinders of N/, six/R shelves shift fork piston cylinder and four/second gear shift fork piston cylinder; When piston is in position, a left side; Shift fork respectively with one grade of speed changer, N when, six grades is connected with the fourth gear gearshift, when piston was in right, shift fork was connected with the second gear gearshift with the third gear of speed changer, five grades, R shelves respectively.
The utility model adopts simple two-position four-way mechanical commutation valve, and the multi-way valve comparison with in the original structure has reduced cost of production; Adopted the 3-position-3-way solenoid directional control valve, made shift of transmission control more accurate; Regulate electromagnetic valve gearshift pressure by a ratio pressure, make the gear shift control strategy clearer and more definite.The utility model has reduced the quantity of solenoid valve, substitutes two 17 high logical multi-way valve of difficulty of processing by the two-position four-way mechanical valve, on the basis that reduces the hydraulic module cost of production, control accuracy is further improved.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is the hydraulic circuit figure of the utility model;
Fig. 2 is double-clutch speed changer hydraulic circuit figure when being in a gear;
Fig. 3 is double-clutch speed changer hydraulic circuit figure when being in two gears;
Fig. 4 is double-clutch speed changer hydraulic circuit figure when being in three gears;
Fig. 5 is double-clutch speed changer hydraulic circuit figure when being in the fourth gear position;
Fig. 6 is double-clutch speed changer hydraulic circuit figure when being in five gears;
Fig. 7 is double-clutch speed changer hydraulic circuit figure when being in six gears;
Fig. 8 is double-clutch speed changer hydraulic circuit figure when being in the R gear;
Fig. 9 is double-clutch speed changer hydraulic circuit figure when being in the N gear.
Each label is among the figure: 1, fuel tank, 2, filter cleaner, 3, oil pump, 4, relief valve, 5, other control oil channel; 6, ratio pressure is regulated solenoid valve, and 7, solenoid directional control valve A, 8, solenoid directional control valve B, 9, electromagnetic switch valve; 10, mechanical commutation valve A, 11, mechanical commutation valve B, 12, mechanical commutation valve C, 13, mechanical commutation valve D; 14, one/third gear shift fork piston cylinder, 15, five grades of shift fork piston cylinders of N/, 16, six/R shelves shift fork piston cylinder, 17, four/second gear shift fork piston cylinder.
Embodiment
Referring to Fig. 1; The utility model comprises fuel tank 1, filter cleaner 2, oil pump 3, relief valve 4, hydraulic pressure gear shift control oil circuit and other control oil channel 5 in constituting; Its specialization is: hydraulic module comprises ratio pressure adjusting solenoid valve 6, electromagnetic switch valve 9, solenoid directional control valve A 7, solenoid directional control valve B 8, mechanical commutation valve A 10, mechanical commutation valve B 11, mechanical commutation valve C 12, mechanical commutation valve D 13 and four shift fork piston cylinders in the said hydraulic pressure gear shift control oil circuit; Said electromagnetic switch valve 9 is regulated solenoid valve 6 with ratio pressure and is connected in the hydraulic pressure gear shift control working connection; Said ratio pressure is regulated solenoid valve 6 and is connected solenoid directional control valve A 7, solenoid directional control valve B 8; Said solenoid directional control valve A 7 connects mechanical selector valve A 10, mechanical commutation valve B 11; Said solenoid directional control valve B 8 connects mechanical selector valve C 12, mechanical commutation valve D 13, and said mechanical commutation valve A 10, mechanical commutation valve B 11, mechanical commutation valve C 12, mechanical commutation valve D 13 are connected with pairing shift fork piston cylinder 14,15,16,17 respectively.
Referring to Fig. 1, solenoid directional control valve A 7, solenoid directional control valve B 8 during the utility model constitutes are the 3-position-3-way selector valve.
Referring to Fig. 1, mechanical commutation valve A 10, tool selector valve B 11, tool selector valve C 12, tool selector valve D 13 during the utility model constitutes are two-position four way change valve.
Referring to Fig. 1; Four shift fork piston cylinders during the utility model constitutes are respectively one/third gear shift fork piston cylinder 14, five grades of shift fork piston cylinders 15 of N/, six/R shelves shift fork piston cylinder 16 and four/second gear shift fork piston cylinder 17; When piston is in position, a left side; Shift fork respectively with one grade of speed changer, N when, six grades is connected with the fourth gear gearshift, when piston was in right, shift fork was connected with the second gear gearshift with the third gear of speed changer, five grades, R shelves respectively.
Referring to Fig. 2; The circulation route of hydraulic oil is during the utility model one gear shift: hydraulic oil is regulated solenoid valve 6 through ratio pressure and is regulated oil pressure; Again through the right position of 3-position-3-way solenoid directional control valve B 8 and left the position, a left side that arrives one/third gear shift fork piston cylinder 14 of two-position four-way mechanical commutation valve A 10; The promotion shifting fork bar moves right, and a gear shift is accomplished.
Referring to Fig. 3; The circulation route of hydraulic oil is during the utility model two gear shifts: hydraulic oil is regulated solenoid valve 6 through ratio pressure and is regulated oil pressure; Again through the position, a left side of 3-position-3-way solenoid directional control valve A 7 and right the right position that arrives four/second gear shift fork piston cylinder 17 of two-position four-way mechanical commutation valve D 13; The promotion shifting fork bar is moved to the left, and two gear shifts are accomplished.
Referring to 4; The circulation route of hydraulic oil is during the utility model three gear shifts: hydraulic oil is regulated solenoid valve 6 through ratio pressure and is regulated oil pressure; Again through the right position of 3-position-3-way solenoid directional control valve B 8 and right the right position that arrives one/third gear shift fork piston cylinder 14 of two-position four-way mechanical commutation valve A 10; The promotion shifting fork bar is moved to the left, and three gear shifts are accomplished.
Referring to 5; The circulation route of hydraulic oil is during the gear shift of the utility model fourth gear: hydraulic oil is regulated solenoid valve 6 through ratio pressure and is regulated oil pressure; Again through the position, a left side of 3-position-3-way solenoid directional control valve A 7 and left the position, a left side that arrives four/second gear shift fork piston cylinder 17 of two-position four-way mechanical commutation valve D 13; The promotion shifting fork bar moves right, and the fourth gear gear shift is accomplished.
Referring to 6; The circulation route of hydraulic oil is during the utility model five gear shifts: hydraulic oil is regulated solenoid valve 6 through ratio pressure and is regulated oil pressure; Again through the position, a left side of 3-position-3-way solenoid directional control valve B 8 and right the right position that arrives five grades of shift fork piston cylinders 15 of N/ of two-position four-way mechanical commutation valve B 11; The promotion shifting fork bar is moved to the left, and five gear shifts are accomplished.
Referring to 7; The circulation route of hydraulic oil is during the utility model six gear shifts: hydraulic oil is regulated solenoid valve 6 through ratio pressure and is regulated oil pressure; Again through the right position of 3-position-3-way solenoid directional control valve A 7 and left the position, a left side that arrives six/R shelves shift fork piston cylinder 16 of two-position four-way mechanical commutation valve C 12; The promotion shifting fork bar moves right, and six gear shifts are accomplished.
Referring to 8; The circulation route of hydraulic oil is during the utility model R gear shift: hydraulic oil is regulated solenoid valve 6 through ratio pressure and is regulated oil pressure; Again through the right position of 3-position-3-way solenoid directional control valve A 7 and right the right position that arrives six/R shelves shift fork piston cylinder 16 of two-position four-way mechanical commutation valve C 12; The promotion shifting fork bar is moved to the left, and the R gear shift is accomplished.
Referring to 9, the utility model ratio pressure when the N shelves is regulated solenoid valve 6 and is closed, and hydraulic oil can not pass through ratio pressure and regulate solenoid valve 6.
Claims (4)
1. double-clutch speed changer hydraulic pressure shifting control system; Comprise fuel tank (1), filter cleaner (2), oil pump (3), relief valve (4), hydraulic pressure gear shift control oil circuit and other control oil channel (5) in the formation; It is characterized in that; Hydraulic module comprises ratio pressure adjusting solenoid valve (6), electromagnetic switch valve (9), solenoid directional control valve A (7), solenoid directional control valve B (8), mechanical commutation valve A (10), mechanical commutation valve B (11), mechanical commutation valve C (12), mechanical commutation valve D (13) and four shift fork piston cylinders in the said hydraulic pressure gear shift control oil circuit; Said electromagnetic switch valve (9) and ratio pressure are regulated solenoid valve (6) and are connected in the hydraulic pressure gear shift control working connection; Said ratio pressure is regulated solenoid valve (6) and is connected solenoid directional control valve A (7), solenoid directional control valve B (8); Said solenoid directional control valve A (7) connects mechanical selector valve A (10), mechanical commutation valve B (11); Said solenoid directional control valve B (8) connects mechanical selector valve C (12), mechanical commutation valve D (13), and said mechanical commutation valve A (10), mechanical commutation valve B (11), mechanical commutation valve C (12), mechanical commutation valve D (13) are connected with pairing shift fork piston cylinder (14,15,16,17) respectively.
2. a kind of double-clutch speed changer hydraulic pressure shifting control system according to claim 1 is characterized in that said solenoid directional control valve A (7), solenoid directional control valve B (8) are the 3-position-3-way selector valve.
3. a kind of double-clutch speed changer hydraulic pressure shifting control system according to claim 2; It is characterized in that said mechanical commutation valve A (10), mechanical commutation valve B (11), mechanical commutation valve C (12), mechanical commutation valve D (13) are two-position four way change valve.
4. a kind of double-clutch speed changer hydraulic pressure shifting control system according to claim 3; It is characterized in that; Said four shift fork piston cylinders are respectively one/third gear shift fork piston cylinder (14), five grades of shift fork piston cylinders of N/ (15), six/R shelves shift fork piston cylinder (16) and four/second gear shift fork piston cylinder (17); When piston is in position, a left side; Shift fork respectively with one grade of speed changer, N when, six grades is connected with the fourth gear gearshift, when piston was in right, shift fork was connected with the second gear gearshift with the third gear of speed changer, five grades, R shelves respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205629897U CN202612588U (en) | 2011-12-29 | 2011-12-29 | Hydraulic gear-shifting control system for double clutch transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205629897U CN202612588U (en) | 2011-12-29 | 2011-12-29 | Hydraulic gear-shifting control system for double clutch transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202612588U true CN202612588U (en) | 2012-12-19 |
Family
ID=47346290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205629897U Expired - Fee Related CN202612588U (en) | 2011-12-29 | 2011-12-29 | Hydraulic gear-shifting control system for double clutch transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202612588U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363101A (en) * | 2013-07-30 | 2013-10-23 | 长城汽车股份有限公司 | Dual clutch automatic transmission and hydraulic pressure gear-shifting control system thereof |
| CN103398171A (en) * | 2013-07-31 | 2013-11-20 | 长城汽车股份有限公司 | Automatic double-clutch transmission and hydraulic shifting control system thereof |
| CN103470751A (en) * | 2013-09-29 | 2013-12-25 | 长城汽车股份有限公司 | Hybrid electric vehicle and double clutch automatic transmission used for hybrid electric vehicle |
| CN106687720A (en) * | 2014-09-12 | 2017-05-17 | 格特拉格传动机构和齿轮工厂赫尔曼·哈根迈尔有限公司&两合公司 | Transmission for a motor vehicle |
| CN106763715A (en) * | 2017-02-07 | 2017-05-31 | 上海上汽马瑞利动力总成有限公司 | Shelves system is hung in a kind of 8 gear hydraulic pressure choosing |
| CN107435733A (en) * | 2017-05-24 | 2017-12-05 | 捷孚传动科技有限公司 | Gear shifting hydraulic control system and gearbox |
| CN107588188A (en) * | 2016-07-08 | 2018-01-16 | 广州汽车集团股份有限公司 | The hydraulic gear-shifting control system of double-clutch automatic gearbox |
| CN108317244A (en) * | 2017-01-18 | 2018-07-24 | 上海汽车集团股份有限公司 | Double-clutch automatic gearbox and its fork controls method, apparatus |
| CN111720536A (en) * | 2020-07-16 | 2020-09-29 | 江苏沃得农业机械股份有限公司 | Tractor electrohydraulic control gearshift |
-
2011
- 2011-12-29 CN CN2011205629897U patent/CN202612588U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363101A (en) * | 2013-07-30 | 2013-10-23 | 长城汽车股份有限公司 | Dual clutch automatic transmission and hydraulic pressure gear-shifting control system thereof |
| CN103363101B (en) * | 2013-07-30 | 2015-11-18 | 长城汽车股份有限公司 | Double-clutch automatic gearbox and hydraulic gear-shifting control system thereof |
| CN103398171A (en) * | 2013-07-31 | 2013-11-20 | 长城汽车股份有限公司 | Automatic double-clutch transmission and hydraulic shifting control system thereof |
| CN103398171B (en) * | 2013-07-31 | 2015-11-18 | 长城汽车股份有限公司 | Double-clutch automatic gearbox and hydraulic gear-shifting control system thereof |
| CN103470751A (en) * | 2013-09-29 | 2013-12-25 | 长城汽车股份有限公司 | Hybrid electric vehicle and double clutch automatic transmission used for hybrid electric vehicle |
| CN106687720A (en) * | 2014-09-12 | 2017-05-17 | 格特拉格传动机构和齿轮工厂赫尔曼·哈根迈尔有限公司&两合公司 | Transmission for a motor vehicle |
| CN106687720B (en) * | 2014-09-12 | 2019-06-18 | 格特拉格传动机构和齿轮工厂赫尔曼·哈根迈尔有限公司&两合公司 | Speed changer for motor vehicle |
| CN107588188B (en) * | 2016-07-08 | 2023-03-10 | 广州汽车集团股份有限公司 | Hydraulic gear-shifting control system of double-clutch automatic transmission |
| CN107588188A (en) * | 2016-07-08 | 2018-01-16 | 广州汽车集团股份有限公司 | The hydraulic gear-shifting control system of double-clutch automatic gearbox |
| CN108317244A (en) * | 2017-01-18 | 2018-07-24 | 上海汽车集团股份有限公司 | Double-clutch automatic gearbox and its fork controls method, apparatus |
| CN108317244B (en) * | 2017-01-18 | 2020-01-31 | 上海汽车集团股份有限公司 | Double-clutch automatic transmission and shifting fork control method and device thereof |
| CN106763715A (en) * | 2017-02-07 | 2017-05-31 | 上海上汽马瑞利动力总成有限公司 | Shelves system is hung in a kind of 8 gear hydraulic pressure choosing |
| CN107435733A (en) * | 2017-05-24 | 2017-12-05 | 捷孚传动科技有限公司 | Gear shifting hydraulic control system and gearbox |
| CN111720536A (en) * | 2020-07-16 | 2020-09-29 | 江苏沃得农业机械股份有限公司 | Tractor electrohydraulic control gearshift |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202612588U (en) | Hydraulic gear-shifting control system for double clutch transmission | |
| CN109027221B (en) | Double clutch hydraulic control system for small vehicle | |
| CN105864424A (en) | Double-clutch transmission hydraulic control system | |
| CN203743410U (en) | Double-clutch automatic transmission hydraulic control system and corresponding transmission and automobile | |
| CN201992052U (en) | Double-clutch control device for double-clutch automatic gearbox | |
| CN105909785A (en) | Electromagnetic direct-drive mechanical automatic speed changing device | |
| CN107255158B (en) | A kind of two-speed automatic transmission for pure electric vehicles hydraulic valve plate | |
| CN201258967Y (en) | Shifting device for opposition two stage cylinder | |
| CN203670743U (en) | Dual-clutch automatic transmission hydraulic control system and corresponding transmission and automobile | |
| CN204628445U (en) | The wheeled six gear gearboxes of a kind of duplex-gear | |
| CN101307829A (en) | Automatic mechanical type manual speed-changer gearshift | |
| CN203477295U (en) | Oil way systems capable of achieving limp home and used on hydraulic-control automatic mechanical transmission and double-clutch transmission | |
| CN203585228U (en) | Four-gear gearbox for electric automobile | |
| CN204083197U (en) | Fork truck hydraulic transmission gearbox proportional hydraulic control system | |
| CN204114099U (en) | A kind of hydraulic transmission gearbox proportional hydraulic control system for fork truck | |
| CN204099575U (en) | The proportional hydraulic control system of fork truck hydraulic transmission gearbox | |
| CN101936387B (en) | Hydraulic control system of automatic dual-clutch transmission | |
| CN202812167U (en) | Hydraulic control system capable of buffering L-gear shifting impact in automatic transmission | |
| CN2700646Y (en) | Shifting actuating mechanism of gear box | |
| CN205001500U (en) | Automatically controlled gearbox hydraulic control device of loader | |
| CN106763722A (en) | Double-clutch automatic gearbox hydraulic system | |
| CN201554846U (en) | Automatic gear-shifting device based on automobile with manual transmission | |
| CN204083196U (en) | A kind of fork truck hydraulic transmission gearbox proportional hydraulic control system | |
| CN101943261B (en) | Hydraulic control system of dual-clutch automatic transmission | |
| CN107117161A (en) | A kind of positive torque upshift method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20191229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |