CN102518796A - Automatic hydraulic dual-clutch gear-shifting system - Google Patents
Automatic hydraulic dual-clutch gear-shifting system Download PDFInfo
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- CN102518796A CN102518796A CN2012100039962A CN201210003996A CN102518796A CN 102518796 A CN102518796 A CN 102518796A CN 2012100039962 A CN2012100039962 A CN 2012100039962A CN 201210003996 A CN201210003996 A CN 201210003996A CN 102518796 A CN102518796 A CN 102518796A
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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
- F16H61/0204—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 for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
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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
- F16H61/68—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
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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
- F16H61/0204—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 for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
- F16H2061/0209—Layout of electro-hydraulic control circuits, e.g. arrangement of valves with independent solenoid valves modulating the pressure individually for each clutch or brake
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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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/006—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion power being selectively transmitted by either one of the parallel flow paths
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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
- F16H61/14—Control of torque converter lock-up clutches
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses an automatic hydraulic dual-clutch gear-shifting system. The automatic hydraulic dual-clutch gear-shifting system comprises a mechanical part and an automatic gear-shifting system, wherein the mechanical part comprises a hydraulic torque converter (2) with a lockup clutch (34) and a dual-clutch transmission (3); the hydraulic torque converter (2) adopts the hydraulic torque converter with the model of W305, W375 or W420; the dual-clutch transmission (3) adopts a wet-type dual-clutch transmission with the model of DQ250; a pump wheel (31) in the hydraulic torque converter (2) is connected with a flywheel on an engine (1) and is collinear with a rotation axis of the flywheel of the engine (1); a worm wheel (33) in the hydraulic torque converter (2) and the lockup clutch (34) are riveted into a whole and the worm wheel (33) is collinear with a rotation axis of the lockup clutch (34); and the right end of a hydraulic torque converter output shaft (35) is connected with the left end of the shell of the dual-clutch transmission (3) through a spline.
Description
Technical field
The present invention relates to a kind of hydraulic machine actuating unit that is used on the automobile, more particularly, the present invention relates to a kind of fluid power double clutch automatic gear shifting system.
Background technique
The automatic adaptability of fluid torque converter makes it have stepless change and bending moment performance in the certain limit, and external load is had automatic adjusting and conformability, makes vehicle starting steady, quickens rapidly, even, soft, has fundamentally simplified manipulation.Simultaneously itself have certain damping performance, can reduce the spike load and the torsional vibration of power train effectively, prolonged the life-span of power train.But its maximum defective efficient is low, in order to improve the transmission efficiency of fluid torque converter, generally adopts lockup clutch now.It is meant between the pump impeller and turbine of fluid torque converter; A controllable clutch is installed; When the driving cycle of automobile reaches the target setting operating mode; Solenoidoperated cluthes are pressed the rotating speed of target difference transmission of setting (being slippage control) or be locked into one (being locking control) with pump impeller and turbine, and fluid torque converter becomes semi-rigid or positive drive thereupon.
Double-clutch automatic gearbox has adopted two clutches to be connected with two input shafts respectively.Its main feature is in shift process, and the power of motor constantly is passed to wheel all the time, and such shift process is a power gear shifting.Vehicle implementation power gear shifting, greatly improve shifting comfort, simultaneously guarantee that also vehicle has good and economic, aspects such as vehicle oil consumption and discharging are made moderate progress.
Summary of the invention
Technical problem to be solved by this invention is to have overcome the problem that existing technology exists, and a kind of fluid power double clutch automatic gear shifting system is provided.
For solving the problems of the technologies described above, the present invention adopts following technological scheme to realize: described fluid power double clutch automatic gear shifting system, be made up of mechanical part and automatic gear shifting system.Described mechanical part is made up of the fluid torque converter and the dual-clutch transmission of band lockup clutch.
It is that the fluid torque converter of W305, fluid torque converter or the model that model is W375 are the fluid torque converter of W420 that described fluid torque converter adopts model.
It is the wet-type dual-clutch transmission of DQ250 that described dual-clutch transmission adopts model.
Pump impeller in the fluid torque converter is connected the rotational axis conllinear of the rotational axis of pump impeller and the flywheel of motor with bolt of flywheel on the motor.Turbine and lockup clutch in the fluid torque converter are riveted into one, the rotational axis conllinear of the rotational axis of turbine and lockup clutch.The right-hand member of fluid torque converter output shaft is connected with the left end spline of dual-clutch transmission housing.
Automatic gear shifting system described in the technological scheme is a hydraulic control system, and described hydraulic control system is made up of dynamical element, executive component, control unit and auxiliary element.Described dynamical element is oil pump (30).Described executive component comprises lockup clutch oil cylinder, odd number retaining clutch oil cylinder, even number retaining clutch oil cylinder, No. 1 gearshift oil cylinder, No. 2 gearshift oil cylinders, No. 3 gearshift oil cylinders and No. 4 gearshift oil cylinders.Described control unit comprises that locking solenoid valve, 1 retaining solenoid valve, 3 retaining solenoid valves, 4 retaining solenoid valves, 2 keep off solenoid valves, 5 retaining solenoid valves, neutral solenoid valve, 6 retaining solenoid valves, the solenoid valve that reverses gear, odd number retaining clutch solenoid valve, even number retaining clutch solenoid valve, pressure adjusting solenoid valve, reduction valve, pressure regulator valve, throttle valve and one-way valve.Described auxiliary element comprises oil cooler, lubricating oil path, oil sump and filter cleaner.The filler opening of oil pump is connected with the oil sump pipeline through filter cleaner.The oil outlet of oil pump is connected with the inlet ductwork of one-way valve, and the outlet of one-way valve is connected with the filler opening pipeline of pressure regulator valve with the P mouth with pressure adjusting solenoid valve.The A mouth that pressure is regulated solenoid valve is connected with the control port pipeline of pressure regulator valve, and the P mouth of the P mouth of the P mouth of the oil outlet of pressure regulator valve and the filler opening of reduction valve, 1 retaining solenoid valve, the P mouth of 3 retaining solenoid valves, 4 retaining solenoid valves, the P mouth of 2 retaining solenoid valves, odd number retaining clutch solenoid valve, the P mouth of even number retaining clutch solenoid valve, the P mouth of 5 retaining solenoid valves, the P mouth of neutral solenoid valve, the P mouth of 6 retaining solenoid valves are connected with the P mouth pipeline of the solenoid valve that reverses gear.The reduction valve oil outlet is connected with the filler opening pipeline of throttle valve; The oil outlet of throttle valve is connected with the P mouth pipeline of locking solenoid valve; The A mouth of locking solenoid valve and B mouth successively with the inlet opening of lockup clutch oil cylinder and mechanical part in the filler opening pipeline of fluid torque converter be connected; The filler opening of fluid torque converter is connected with the delivery outlet pipeline of lockup clutch oil cylinder; The oil outlet of fluid torque converter is connected with the entrance pipe of oil cooler, and the outlet of oil cooler is connected with oil sump through the import of pipeline and lubricating oil path.1 retaining solenoid valve is connected with right oil inlet and outlet pipeline with the left oil inlet and outlet of No. 1 gearshift oil cylinder with the A mouth of 3 retaining solenoid valves successively, and 1 retaining solenoid valve is connected with the oil sump pipeline with the T mouth of 3 retaining solenoid valves.4 retaining solenoid valves are connected with right oil inlet and outlet pipeline with the left oil inlet and outlet of No. 2 gearshift oil cylinders with the A mouth of 2 retaining solenoid valves successively, and 4 retaining solenoid valves are connected with the oil sump pipeline with the T mouth of 2 retaining solenoid valves.The A mouth of odd number retaining clutch solenoid valve is connected with the interface pipeline of odd number retaining clutch oil cylinder, and the T mouth of odd number retaining clutch solenoid valve is connected with the oil sump pipeline.The A mouth of even number retaining clutch solenoid valve is connected with the interface pipeline of even number retaining clutch oil cylinder, and the T mouth of even number retaining clutch solenoid valve is connected with the oil sump pipeline.5 retaining solenoid valves are connected with right oil inlet and outlet pipeline with the left oil inlet and outlet of No. 4 gearshift oil cylinders with the A mouth of neutral solenoid valve successively, and 5 retaining solenoid valves are connected with the oil sump pipeline with the T mouth of neutral solenoid valve.6 retaining solenoid valves are connected with right oil inlet and outlet pipeline with the left oil inlet and outlet of No. 3 gearshift oil cylinders with the A mouth of the solenoid valve that reverses gear successively, and 6 retaining solenoid valves are connected with the oil sump pipeline with the T mouth of the solenoid valve that reverses gear; Described No. 1 gearshift oil cylinder, No. 2 gearshift oil cylinders, No. 3 gearshift oil cylinders and the oil cylinder of shifting gears for No. 4 are fixed on the top of dual-clutch transmission housing through support; 1 grade of dual-clutch transmission in piston rod external part and the mechanical part of No. 1 gearshift oil cylinder is fixedly connected with 3 grades of shift forks; 4 grades of dual-clutch transmission in piston rod external part and the mechanical part of No. 2 gearshift oil cylinders are fixedly connected with 2 grades of shift forks; 6 grades of dual-clutch transmission in piston rod external part and the mechanical part of No. 3 gearshift oil cylinders are fixedly connected with reverse speed fork, and 5 grades of the dual-clutch transmission in the piston rod external part of No. 4 oil cylinders of shifting gears and the mechanical part are fixedly connected with the neutral shift fork.One-way valve, pressure are regulated solenoid valve, pressure regulator valve, reduction valve, throttle valve, locking solenoid valve, odd number retaining clutch solenoid valve, even number retaining clutch solenoid valve, 1 retaining solenoid valve, 3 retaining solenoid valves, 4 retaining solenoid valves, 2 retaining solenoid valves, 5 retaining solenoid valves, neutral solenoid valve, 6 retaining solenoid valves and are fixedly mounted on the valve plate in the oil sump with the solenoid valve that reverses gear.Filter cleaner is fixedly mounted in the oil sump.Oil cooler and oil pump are fixedly mounted on the housing of dual-clutch transmission.
Compared with prior art the invention has the beneficial effects as follows:
1. fluid power double clutch automatic gear shifting system of the present invention has improved starting performance owing to adopted the fluid torque converter with flexible transmission and moment of torsion enlarging function;
2. fluid power double clutch automatic gear shifting of the present invention system uses the method for converter lockout when road conditions and top gear preferably, overcome the low shortcoming with the fuel economy difference of torque-converters efficient well;
3. fluid power double clutch automatic gear shifting system of the present invention has realized the shift process power failure-free owing to adopted dual-clutch transmission, has improved shift quality.Fluid power double clutch automatic gear shifting of the present invention system is more suitable for the automobile of types such as large-scale go-anywhere vehicle.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 is that fluid power double clutch automatic gear shifting system of the present invention and gearbox drive concern schematic block diagram;
Fig. 2 is the hydraulic transmission principle figure of the hydraulic control system in the fluid power double clutch automatic gear shifting of the present invention system;
Fig. 3 is the structure and the schematic block diagram of the electricity-liquid transmission in the fluid power double clutch automatic gear shifting of the present invention system;
Among the figure: 1. motor, 2. fluid torque converter, 3. dual-clutch transmission, No. 4.1 jack shaft output gears, the output gear that 5. reverses gear, No. 6.1 reverse idler gears; 7.6 the retaining output gear, the output shaft that 8. reverses gear, No. 9.1 jack shafts, 10.3 retaining input gears, No. 11.2 reverse idler gears, No. 12.3 reverse idler gears; 13. shift fork, 14.5 keep off output gears, 15.5 retaining input gears, 16. odd numbers retaining input shaft, 17.1 retainings and the input gear that reverses gear, 18.1 retaining output gears; 19.2 number jack shaft, 20.3 retaining output gears, 21.4 retainings and 6 retaining input gears, 22.4 retaining output gears, 23.2 retaining input gears, 24.2 retaining output gears; 25.2 number jack shaft output gear, 26. final gears, 27. even numbers retaining input shaft, 28. even numbers retaining clutch, 29. odd numbers retaining clutch, 30. oil pumps; 31. pump impeller, 32. guide wheels, 33. turbines, 34. lockup clutches, 35. fluid torque converter output shafts, LB. lockup clutch oil cylinder; GH1.1 number gearshift oil cylinder, GH2.2 number gearshift oil cylinder, GH3.3 number gearshift oil cylinder, GH4.4 number gearshift oil cylinder, LZ1. odd number retaining clutch oil cylinder, LZ2. even number retaining clutch oil cylinder; A1. locking solenoid valve, B1.1 keeps off solenoid valve, and B2.3 keeps off solenoid valve, and B3.4 keeps off solenoid valve, and B4.2 keeps off solenoid valve, and C1.5 keeps off solenoid valve; C2. neutral solenoid valve, C 3.6 retaining solenoid valves, the C4. solenoid valve that reverses gear, D1. odd number retaining clutch solenoid valve, D2. even number retaining clutch solenoid valve, E. pressure is regulated solenoid valve; F. oil cooler, G. reduction valve, H. pressure regulator valve, J. lubricating oil path, K. throttle valve, X. one-way valve.
Embodiment
Below in conjunction with accompanying drawing the present invention is explained in detail:
Consult Fig. 1, fluid power double clutch automatic gear shifting system is made up of mechanical part and automatic gear shifting system, and mechanical part is made up of with dual-clutch transmission 3 fluid torque converter 2 of band lockup clutch 34.
Fluid torque converter 2 can adopt model be W305, W375 or W420 etc. multiple fluid torque converter, dual-clutch transmission 3 is the two jack shaft structural types of 6 gears.
Fluid torque converter 2 comprises turbine 33, guide wheel 32, pump impeller 31; Pump impeller 31 in the fluid torque converter 2 is connected with bolt of flywheel on the motor 1; The rotational axis conllinear of the flywheel of the rotational axis of pump impeller 31 and motor 1; Turbine 33 in the fluid torque converter 2 is riveted into one the rotational axis conllinear of the rotational axis of turbine 33 and lockup clutch 34 with lockup clutch 34.Turbine 33 in the fluid torque converter, guide wheel 32, pump impeller 31 are sleeved on the fluid torque converter output shaft 35 through internal spline successively; Fluid torque converter output shaft 35 also is the input shaft of dual-clutch transmission 3, and promptly fluid torque converter output shaft 35 right-hand members are connected with the left end spline of dual-clutch transmission 3 housings.It is the wet-type dual-clutch transmission of DQ250 that described dual-clutch transmission 3 adopts model, and the wet-type dual-clutch moment of torsion transmits scope 200-1000Nm.Dual-clutch transmission 3 comprises odd number retaining clutch 29, odd number retaining input shaft 16, even number retaining clutch 28,9, No. 2 jack shafts 19 of even number retaining 27, No. 1 jack shaft of input shaft, output shaft 8 and final gear 26 reverse gear.The left end of odd number retaining input shaft 16 and even number retaining input shaft 27 links to each other with even number retaining clutch 28 with odd number retaining clutch 29 through spline respectively.Odd number retaining input shaft 16 from left to right is equipped with 3 retaining input gears, 10,1 retaining and input gear 17, the 5 retaining input gears 15 that reverse gear successively.Even number retaining input shaft 27 is separately installed with final gear 26,2 retaining input gears 23,4 retainings and 6 retaining input gears 21 for being sleeved on the hollow shaft on the odd number retaining input shaft 16 on the even number retaining input shaft 27.No. 1 jack shaft 9 from left to right is equipped with No. 1 jack shaft output gear 4, output gear 5,6 retaining 7, No. 3 reverse idler gears 12 of output gear and 5 that reverse gear successively and keeps off output gears 14.No. 2 jack shaft 19 from left to right is equipped with jack shaft output gear 25,2 retaining output gear 24,4 retaining output gears, 22,3 retaining output gears 20 and 1 retaining output gears 18 successively No. 2; And No. 1 jack shaft output gear 4 and No. 2 jack shaft output gears 25 often mesh with final gear 26, and power is exported behind final gear 26.
Consult Fig. 2, the automatic gear shifting system in the described fluid power double clutch automatic gear shifting system is a hydraulic control system, and it comprises dynamical element, executive component, control unit and auxiliary element.
Described dynamical element is an oil pump 30.
Described executive component comprises lockup clutch oil cylinder LB, odd number retaining clutch oil cylinder LZ1, even number retaining clutch oil cylinder LZ2, No. 1 gearshift oil cylinder GH1, No. 2 gearshift oil cylinder GH2, No. 3 gearshift oil cylinder GH3, No. 4 gearshift oil cylinder GH4.
Described control unit comprises that locking solenoid valve A1,1 retaining solenoid valve B1,3 retaining solenoid valve B2,4 retaining solenoid valve B3,2 keep off solenoid valve B4,5 retaining solenoid valve C1, neutral solenoid valve C2,6 retaining solenoid valve C3, the solenoid valve C4 that reverses gear, odd number retaining clutch solenoid valve D1, even number retaining clutch solenoid valve D2, pressure adjusting solenoid valve E, reduction valve G, pressure regulator valve H, throttle valve K and one-way valve X.
Described auxiliary element comprises oil cooler F, lubricating oil path J, oil sump (fuel tank) and filter cleaner.
Automatic gear shifting system in the fluid power double clutch automatic gear shifting of the present invention system is a hydraulic control system, and hydraulic control system has seven control loops and forms:
Article one, the starting point of control loop is the oil pump 30 that pressure oil is provided for whole hydraulic control system, and the terminal is fluid torque converter 2 and lockup clutch oil cylinder LB.
The filler opening of oil pump 30 is connected with the oil sump pipeline through filter cleaner; The oil outlet of oil pump 30 is connected with the inlet ductwork of one-way valve X; The outlet of one-way valve X is connected with the filler opening pipeline of pressure regulator valve H with the P mouth with pressure adjusting solenoid valve E; The A mouth that pressure is regulated solenoid valve E is connected with the control port pipeline of pressure regulator valve H; The filler opening pipeline of the oil outlet of pressure regulator valve H and reduction valve G joins, and reduction valve G oil outlet is connected with the filler opening pipeline of throttle valve K, and the oil outlet of throttle valve K is connected with the P mouth pipeline of locking solenoid valve A1; The A mouth of locking solenoid valve A1 is connected with the filler opening pipeline of fluid torque converter 2 with the inlet opening of lockup clutch oil cylinder LB with the B mouth successively, and the filler opening of the fluid torque converter 2 in the mechanical part is connected with the B mouth of locking solenoid valve A1 and the delivery outlet pipeline of lockup clutch oil cylinder LB.The oil outlet of fluid torque converter 2 is connected with the entrance pipe of oil cooler F, and the outlet of oil cooler F is connected with oil sump through the import of pipeline and lubricating oil path J.
The starting point of second control loop is the oil pump 30 that pressure oil is provided for whole hydraulic control system, and the terminal is odd number retaining clutch oil cylinder LZ1.
The filler opening of oil pump 30 is connected with the oil sump pipeline through filter cleaner; The oil outlet of oil pump 30 is connected with the inlet ductwork of one-way valve X; The outlet of one-way valve X is connected with the filler opening pipeline of pressure regulator valve H with the P mouth with pressure adjusting solenoid valve E; The A mouth that pressure is regulated solenoid valve E is connected with the control port pipeline of pressure regulator valve H; The filler opening of the oil outlet of pressure regulator valve H and reduction valve G is connected with the P mouth pipeline of odd number retaining clutch solenoid valve D1, and the A mouth of odd number retaining clutch solenoid valve D1 is connected with the interface pipeline of odd number retaining clutch oil cylinder LZ1, and the T mouth of odd number retaining clutch solenoid valve D1 is connected with the oil sump pipeline.
Article three, the starting point of control loop is the oil pump 30 that pressure oil is provided for whole hydraulic control system, and the terminal is even number retaining clutch oil cylinder LZ2.
The filler opening of oil pump 30 is connected with the oil sump pipeline through filter cleaner; The oil outlet of oil pump 30 is connected with the inlet ductwork of one-way valve X; The outlet of one-way valve X is connected with the filler opening pipeline of pressure regulator valve H with the P mouth with pressure adjusting solenoid valve E; The A mouth that pressure is regulated solenoid valve E is connected with the control port pipeline of pressure regulator valve H; The P mouth of the filler opening of the oil outlet of pressure regulator valve H and reduction valve G, odd number retaining clutch solenoid valve D1 is connected with the P mouth pipeline of even number retaining clutch solenoid valve D2; The A mouth of even number retaining clutch solenoid valve D2 is connected with the interface pipeline of even number retaining clutch oil cylinder LZ2, and the T mouth of even number retaining clutch solenoid valve D2 is connected with the oil sump pipeline.
Article four, the starting point of control loop is the oil pump 30 that pressure oil is provided for whole hydraulic control system, and the terminal is No. 1 gearshift oil cylinder GH1.
The filler opening of oil pump 30 is connected with the oil sump pipeline through filter cleaner; The oil outlet of oil pump 30 is connected with the inlet ductwork of one-way valve X; The outlet of one-way valve X is connected with the filler opening pipeline of pressure regulator valve H with the P mouth with pressure adjusting solenoid valve E; The A mouth that pressure is regulated solenoid valve E is connected with the control port pipeline of pressure regulator valve H; The P mouth of the P mouth of the filler opening of the oil outlet of pressure regulator valve H and reduction valve G, odd number retaining clutch solenoid valve D1, even number retaining clutch solenoid valve D2, the P mouth of 1 retaining solenoid valve B1 are connected with the P mouth pipeline of 3 retaining solenoid valve B2; 1 retaining solenoid valve B1 is connected with right oil inlet and outlet pipeline with the left side turnover oil of No. 1 gearshift oil cylinder GH1 with the A mouth of 3 retaining solenoid valve B2 successively, and 1 retaining solenoid valve B1 is connected with the oil sump pipeline with the T mouth of 3 retaining solenoid valve B2.1 grade of dual-clutch transmission 3 in the piston rod external part of No. 1 gearshift oil cylinder GH1 and the mechanical part is fixedly connected with 3 grades of shift forks.
Article five, the starting point of control loop is the oil pump 30 that pressure oil is provided for whole hydraulic control system, and the terminal is No. 2 gearshift oil cylinder GH2.
The filler opening of oil pump 30 is connected with the oil sump pipeline through filter cleaner; The oil outlet of oil pump 30 is connected with the inlet ductwork of one-way valve X; The outlet of one-way valve X is connected with the filler opening pipeline of pressure regulator valve H with the P mouth with pressure adjusting solenoid valve E; The A mouth that pressure is regulated solenoid valve E is connected with the control port pipeline of pressure regulator valve H; The P mouth of the P mouth of the P mouth of the filler opening of the oil outlet of pressure regulator valve H and reduction valve G, odd number retaining clutch solenoid valve D1, even number retaining clutch solenoid valve D2, the P mouth of 1 retaining solenoid valve B1,3 retaining solenoid valve B2, the P mouth of 4 retaining solenoid valve B 3 are connected with the P mouth pipeline of 2 retaining solenoid valve B4; 4 retaining solenoid valve B3 are connected with right oil inlet and outlet pipeline with the left side turnover oil of No. 2 gearshift oil cylinder GH2 with the A mouth of 2 retaining solenoid valve B4 successively, and 4 retaining solenoid valve B3 are connected with the oil sump pipeline with the T mouth of 2 retaining solenoid valve B4.4 grades of dual-clutch transmission 3 in the piston rod external part of No. 2 gearshift oil cylinder GH2 and the mechanical part are fixedly connected with 2 grades of shift forks.
Article six, the starting point of control loop is the oil pump 30 that pressure oil is provided for whole hydraulic control system, and the terminal is No. 3 gearshift oil cylinder GH3.
The filler opening of oil pump 30 is connected with the oil sump pipeline through filter cleaner; The oil outlet of oil pump 30 is connected with the inlet ductwork of one-way valve X; The outlet of one-way valve X is connected with the filler opening pipeline of pressure regulator valve H with the P mouth with pressure adjusting solenoid valve E; The A mouth that pressure is regulated solenoid valve E is connected with the control port pipeline of pressure regulator valve H; The P mouth of the P mouth of the P mouth of the filler opening of the oil outlet of pressure regulator valve H and reduction valve G, odd number retaining clutch solenoid valve D1, even number retaining clutch solenoid valve D2, the P mouth of 1 retaining solenoid valve B1,3 retaining solenoid valve B2, the P mouth of 4 retaining solenoid valve B3, the P mouth of 2 retaining solenoid valve B4, the P mouth of 6 retaining solenoid valve C3 are connected with the P mouth pipeline of the solenoid valve C4 that reverses gear; 6 retaining solenoid valve C3 are connected with right oil inlet and outlet pipeline with the left side turnover oil of No. 3 gearshift oil cylinder GH3 with the A mouth of the solenoid valve C4 that reverses gear successively, and 6 retaining solenoid valve C3 are connected with the oil sump pipeline with the T mouth of the solenoid valve C4 that reverses gear.6 grades of dual-clutch transmission 3 in the piston rod external part of No. 3 gearshift oil cylinder GH3 and the mechanical part are fixedly connected with reverse speed fork.
Article seven, the starting point of control loop is the oil pump 30 that pressure oil is provided for whole hydraulic control system, and the terminal is No. 4 gearshift oil cylinder GH4.
The filler opening of oil pump 30 is connected with the oil sump pipeline through filter cleaner; The oil outlet of oil pump 30 is connected with the inlet ductwork of one-way valve X; The outlet of one-way valve X is connected with the filler opening pipeline of pressure regulator valve H with the P mouth with pressure adjusting solenoid valve E; The A mouth that pressure is regulated solenoid valve E is connected with the control port pipeline of pressure regulator valve H; The P mouth of the P mouth of the P mouth of the filler opening of the oil outlet of pressure regulator valve H and reduction valve G, odd number retaining clutch solenoid valve D1, even number retaining clutch solenoid valve D2, the P mouth of 1 retaining solenoid valve B1,3 retaining solenoid valve B2, the P mouth of 4 retaining solenoid valve B3, the P mouth of 2 retaining solenoid valve B4, the P mouth of 6 retaining solenoid valve C3, the P mouth of the solenoid valve C4 that reverses gear, the P mouth of 5 retaining solenoid valve C1 are connected with the P mouth pipeline of neutral solenoid valve C2; 5 retaining solenoid valve C1 are connected with right oil inlet and outlet pipeline with the left side turnover oil of No. 4 gearshift oil cylinder GH4 with the A mouth of neutral solenoid valve C2 successively, and 5 retaining solenoid valve C1 are connected with the oil sump pipeline with the T mouth of neutral solenoid valve C2.5 grades of dual-clutch transmission 3 in the piston rod external part of No. 4 gearshift oil cylinder GH4 and the mechanical part are fixedly connected with the neutral shift fork.
No. 1 gearshift oil cylinder GH1, No. 2 gearshift oil cylinder GH2, No. 3 gearshift oil cylinder GH3 and the oil cylinder GH4 that shifts gears for No. 4 are fixed on the top of dual-clutch transmission 3 housings through support; One-way valve X, pressure regulate solenoid valve E, pressure regulator valve H, reduction valve G, throttle valve K, locking solenoid valve A1, odd number retaining clutch solenoid valve D1, even number retaining clutch solenoid valve D2,1 retaining solenoid valve B1,3 retaining solenoid valve B2,4 retaining solenoid valve B3,2 retaining solenoid valve B4,5 retaining solenoid valve C1, neutral solenoid valve C2,6 retaining solenoid valve C3 and are fixedly mounted on the valve plate in the oil sump with the solenoid valve C4 that reverses gear; Filter cleaner is fixedly mounted in the oil sump, and oil cooler F and oil pump 30 are fixedly mounted on the housing of dual-clutch transmission 3.
Consult Fig. 3; Be the structure and the schematic block diagram of the electricity-liquid transmission in the fluid power double clutch automatic gear shifting system shown in the figure: initial gear is 1 retaining during vehicle starting; ECU TCU according to information such as gear position sensor, velocity transducer, pedal position sensor judge to hang into gear; ECU TCU passes through CAN bus and motor swap data, and to sending speed governing, transferring and turn round request, sends the gear shift control instruction simultaneously; The action of control corresponding solenoid valve, oil-filled, the completion gearshift of draining the oil of corresponding oil hydraulic cylinder.
The working principle of fluid power double clutch automatic gear shifting system:
Be full of the pressure oil that oil pump 30 provides in the fluid torque converter 2 in the course of the work; The power that it accepts motor 1 output engages odd number retaining clutch 29 or even number retaining clutch 28 through automatic gear shifting system; Transmission of power No. 1 jack shaft 9 and No. 2 jack shafts 19 to gearbox; According to hanging the gear of going into, output behind final gear 26 in advance.
In shift process, data such as the speed of a motor vehicle that automatic gear shifting system extracts according to vehicle speed sensor and throttle sensor and accelerator open degree, judgement target gear; ECU TCU gear is as required controlled corresponding gear solenoid valve action, impels corresponding gearshift cylinder action; Hang gear in advance; After treating that shift sensor shows the completion of putting into gear, control odd number retaining clutch solenoid valve D1 and even number retaining clutch solenoid valve D2 control odd number retaining clutch oil cylinder LZ1 and even number respectively and keep off clutch oil cylinder LZ2 action; Make that odd number retaining clutch separates with one on clutch of even number retaining, a combination, thereby the completion power failure-free is shifted gears.When automobile was run at high speed more than 3 retainings, ECU sent control command control locking solenoid valve A1 action, impels lockup clutch oil cylinder LB action, accomplishes locking.
Fluid power double clutch automatic gear shifting system shift process is elaborated at present:
Neutral rises 1 retaining process
Fluid torque converter 2 releases; The P mouth and the A mouth that are locking solenoid valve A1 are connected, and pressure oil gets into oil pump 30 from oil sump behind filter cleaner, behind pressure regulator valve H, get into reduction valve G; P mouth and A mouth through locking solenoid valve A1; Get into lockup clutch oil cylinder LB, make lockup clutch 34 actions for fluid torque converter 2 pressure oil is provided, the pressure oil after the work flows back to oil sump from the unloading port of fluid torque converter behind oil cooler F.
1 retaining solenoid valve B1 action, P mouth and A mouth are connected, and No. 1 gearshift oil cylinder GH1 left end is oil-filled, and piston rod moves right and makes double-clutch automatic gearbox 3 hang 1 grade; Odd number retaining clutch solenoid valve D1 action, P mouth and the A mouth of odd number retaining clutch solenoid valve D1 are connected, and LZ1 is oil-filled for odd number retaining clutch oil cylinder, and odd number retaining clutch 29 engages.
1 retaining rises 2 retaining processes
Fluid torque converter 2 releases, 2 retaining solenoid valve B4 move, and P mouth and A mouth are connected, and No. 2 gearshift oil cylinder GH2 right-hand member is oil-filled, and piston rod is hung into 2 grades to left movement, and No. 2 gearshift oil cylinder GH2 left end is drained the oil through A mouth and the connection of T mouth of 4 retaining solenoid valve B3; Odd number retaining clutch solenoid valve D1 action, A mouth and the T mouth of odd number retaining clutch solenoid valve D1 are connected, odd number retaining clutch oil cylinder LZ1 emptying, odd number retaining clutch 29 separates; Even number retaining clutch solenoid valve D2 action, P mouth and A mouth are connected, and LZ2 is oil-filled for even number retaining clutch oil cylinder, and even number retaining clutch 28 engages.
2 retainings rise 3 retaining processes
Fluid torque converter 2 lockings; The P mouth and the B mouth that are locking solenoid valve A1 are connected, and pressure oil gets into oil pump 30 from oil sump behind filter cleaner, behind pressure regulator valve H, get into reduction valve G; P mouth and B mouth through locking solenoid valve A1 are that fluid torque converter 2 provides pressure oil; At this moment, pressure oil makes lockup clutch 34 lockings, and the pressure oil after the work flows back to oil sump from the unloading port of fluid torque converter 2 behind oil cooler F.
3 retaining solenoid valve B2 actions, P mouth and A mouth are connected, and No. 1 gearshift oil cylinder GH1 right-hand member is oil-filled, and piston rod is hung into 3 grades to left movement; Odd number retaining clutch solenoid valve D1 action, P mouth and the A mouth of odd number retaining clutch solenoid valve D1 are connected, and LZ1 is oil-filled for odd number retaining clutch oil cylinder, and odd number retaining clutch 29 engages; Even number retaining clutch solenoid valve D2 action, A mouth and the T mouth of even number retaining clutch solenoid valve D2 are connected, even number retaining clutch oil cylinder LZ2 emptying, even number retaining clutch 28 separates.
3 retainings rise 4 retaining processes
Fluid torque converter 2 lockings, 4 retaining solenoid valve B3 actions, P mouth and the A mouth of 4 retaining solenoid valve B3 are connected, and No. 2 gearshift oil cylinder GH2 left end is oil-filled, and piston rod moves right hangs 4 grades; Odd number retaining clutch solenoid valve D1 action, A mouth and the T mouth of odd number retaining clutch solenoid valve D1 are connected, odd number retaining clutch oil cylinder LZ1 emptying, odd number retaining clutch 29 separates; Even number retaining clutch solenoid valve D2 action, P mouth and the A mouth of even number retaining clutch solenoid valve D2 are connected, and LZ2 is oil-filled for even number retaining clutch oil cylinder, and even number retaining clutch 28 engages.
4 retainings rise 5 retaining processes
Fluid torque converter 2 lockings, 5 retaining solenoid valve C1 actions, P mouth and the A mouth of 5 retaining solenoid valve C1 are connected, and No. 4 gearshift oil cylinder GH4 left end is oil-filled, and piston rod moves right hangs 5 grades; Odd number retaining clutch solenoid valve D1 action, P mouth and the A mouth of odd number retaining clutch solenoid valve D1 are connected, and LZ1 is oil-filled for odd number retaining clutch oil cylinder, and odd number retaining clutch 29 engages; Even number retaining clutch solenoid valve D2 action, A mouth and the T mouth of even number retaining clutch solenoid valve D2 are connected, even number retaining clutch oil cylinder LZ2 emptying, even number retaining clutch 28 separates.
5 retainings rise 6 retaining processes
Fluid torque converter 2 lockings, 6 retaining solenoid valve C3 actions, P mouth and the A mouth of 6 retaining solenoid valve C3 are connected, and No. 3 gearshift oil cylinder GH3 left end is oil-filled, and piston rod moves right hangs 6 grades; Odd number retaining clutch solenoid valve D1 action, A mouth and the T mouth of odd number retaining clutch solenoid valve D1 are connected, odd number retaining clutch oil cylinder LZ1 emptying, odd number retaining clutch 29 separates; Even number retaining clutch solenoid valve D2 action, P mouth and the A mouth of even number retaining clutch solenoid valve D2 are connected, and LZ2 is oil-filled for even number retaining clutch oil cylinder, and even number retaining clutch 28 engages.
Neutral is hung the process of reversing gear
Fluid torque converter 2 releases, fluid torque converter 2 lockings, the solenoid valve C4 that reverses gear action, the P mouth of the solenoid valve C4 that reverses gear and A mouth are connected, and No. 3 gearshift oil cylinder GH3 right-hand member is oil-filled, and piston rod is hung into reverse gear to left movement; Odd number retaining clutch solenoid valve D1 action, P mouth and the A mouth of odd number retaining clutch solenoid valve D1 are connected, and LZ1 is oil-filled for odd number retaining clutch oil cylinder, and odd number retaining clutch 29 engages.
Claims (3)
1. a fluid power double clutch automatic gear shifting system is made up of mechanical part and automatic gear shifting system, it is characterized in that, described mechanical part is made up of with dual-clutch transmission (3) the fluid torque converter (2) of band lockup clutch (34);
It is that the fluid torque converter of W305, fluid torque converter or the model that model is W375 are the fluid torque converter of W420 that described fluid torque converter (2) adopts model;
It is the wet-type dual-clutch transmission of DQ250 that described dual-clutch transmission (3) adopts model;
Pump impeller (31) in the fluid torque converter (2) is connected with bolt of flywheel on the motor (1); The rotational axis conllinear of the flywheel of the rotational axis of pump impeller (31) and motor (1); Turbine (33) in the fluid torque converter (2) is riveted into one with lockup clutch (34); The rotational axis conllinear of the rotational axis of turbine (33) and lockup clutch (34), the right-hand member of fluid torque converter output shaft (35) is connected with the left end spline of dual-clutch transmission (3) housing.
2. according to the described fluid power double-clutch type of claim 1 automatic gear shifting system, it is characterized in that described automatic gear shifting system is a hydraulic control system, described hydraulic control system is made up of dynamical element, executive component, control unit and auxiliary element;
Described dynamical element is oil pump (30);
Described executive component comprises lockup clutch oil cylinder (LB), odd number retaining clutch oil cylinder (LZ1), even number retaining clutch oil cylinder (LZ2), the oil cylinder (GH1) of shifting gears for No. 1, the oil cylinder (GH2) of shifting gears for No. 2, No. 3 gearshift oil cylinders (GH3) and No. 4 gearshift oil cylinders (GH4);
Described control unit comprises that locking solenoid valve (A1), 1 retaining solenoid valve (B1), 3 retaining solenoid valves (B2), 4 retaining solenoid valves (B3), 2 keep off solenoid valves (B4), 5 retaining solenoid valves (C1), neutral solenoid valve (C2), 6 retaining solenoid valves (C3), the solenoid valve that reverses gear (C4), odd number retaining clutch solenoid valve (D1), even number retaining clutch solenoid valve (D2), pressure adjusting solenoid valve (E), reduction valve (G), pressure regulator valve (H), throttle valve (K) and one-way valve (X);
Described auxiliary element comprises oil cooler (F), lubricating oil path (J), oil sump and filter cleaner;
The filler opening of oil pump (30) is connected with the oil sump pipeline through filter cleaner; The oil outlet of oil pump (30) is connected with the inlet ductwork of one-way valve (X); The outlet of one-way valve (X) is connected with the filler opening pipeline of pressure regulator valve (H) with the P mouth with pressure adjusting solenoid valve (E); The A mouth that pressure is regulated solenoid valve (E) is connected with the control port pipeline of pressure regulator valve (H), and the P mouth of the P mouth of the P mouth of the oil outlet of pressure regulator valve (H) and the filler opening of reduction valve (G), 1 retaining solenoid valve (B1), the P mouth of 3 retaining solenoid valves (B2), 4 retaining solenoid valves (B3), the P mouth of 2 retaining solenoid valves (B4), odd number retaining clutch solenoid valve (D1), the P mouth of even number retaining clutch solenoid valve (D2), the P mouth of 5 retaining solenoid valves (C1), the P mouth of neutral solenoid valve (C2), the P mouth of 6 retaining solenoid valves (C3) are connected with the P mouth pipeline of the solenoid valve that reverses gear (C4); Reduction valve (G) oil outlet is connected with the filler opening pipeline of throttle valve (K); The oil outlet of throttle valve (K) is connected with the P mouth pipeline of locking solenoid valve (A1); The A mouth of locking solenoid valve (A1) and B mouth successively with the inlet opening of lockup clutch oil cylinder (LB) and mechanical part in the filler opening pipeline of fluid torque converter (2) be connected; The filler opening of fluid torque converter (2) is connected with the delivery outlet pipeline of lockup clutch oil cylinder (LB); The oil outlet of fluid torque converter (2) is connected with the entrance pipe of oil cooler (F), and the outlet of oil cooler (F) is connected with oil sump through the import of pipeline and lubricating oil path (J); 1 retaining solenoid valve (B1) is connected with right oil inlet and outlet pipeline with the left oil inlet and outlet of No. 1 gearshift oil cylinder (GH1) with the A mouth of 3 retaining solenoid valves (B2) successively, and 1 retaining solenoid valve (B1) is connected with the oil sump pipeline with the T mouth of 3 retaining solenoid valves (B2); 4 retaining solenoid valves (B3) are connected with right oil inlet and outlet pipeline with the left oil inlet and outlet of No. 2 gearshift oil cylinders (GH2) with the A mouth of 2 retaining solenoid valves (B4) successively, and 4 retaining solenoid valves (B 3) are connected with the oil sump pipeline with the T mouth of 2 retaining solenoid valves (B4); The A mouth of odd number retaining clutch solenoid valve (D1) is connected with the interface pipeline of odd number retaining clutch oil cylinder (LZ1), and the T mouth of odd number retaining clutch solenoid valve (D1) is connected with the oil sump pipeline; The A mouth of even number retaining clutch solenoid valve (D2) is connected with the interface pipeline of even number retaining clutch oil cylinder (LZ2), and the T mouth of even number retaining clutch solenoid valve (D2) is connected with the oil sump pipeline; 5 retaining solenoid valves (C1) are connected with right oil inlet and outlet pipeline with the left oil inlet and outlet of No. 4 gearshift oil cylinders (GH4) with the A mouth of neutral solenoid valve (C2) successively, and 5 retaining solenoid valves (C1) are connected with the oil sump pipeline with the T mouth of neutral solenoid valve (C2); 6 retaining solenoid valves (C3) are connected with right oil inlet and outlet pipeline with the left oil inlet and outlet of No. 3 gearshift oil cylinders (GH3) with the A mouth of the solenoid valve that reverses gear (C4) successively, and 6 retaining solenoid valves (C3) are connected with the oil sump pipeline with the T mouth of the solenoid valve that reverses gear (C4).
3. according to the described fluid power double-clutch type of claim 2 automatic gear shifting system; It is characterized in that; Described No. 1 gearshift oil cylinder (GH1), No. 2 gearshift oil cylinders (GH2), No. 3 gearshift oil cylinders (GH3) and No. 4 gearshift oil cylinders (GH4) are fixed on the top of dual-clutch transmission (3) housing through support; 1 grade of dual-clutch transmission (3) in piston rod external part and the mechanical part of No. 1 gearshift oil cylinder (GH1) is fixedly connected with 3 grades of shift forks; 4 grades of dual-clutch transmission (3) in piston rod external part and the mechanical part of No. 2 gearshift oil cylinders (GH2) are fixedly connected with 2 grades of shift forks; 6 grades of dual-clutch transmission (3) in piston rod external part and the mechanical part of No. 3 gearshift oil cylinders (GH3) are fixedly connected with reverse speed fork; 5 grades of dual-clutch transmission (3) in piston rod external part and the mechanical part of No. 4 gearshift oil cylinders (GH4) are fixedly connected with the neutral shift fork, and one-way valve (X), pressure are regulated solenoid valve (E), pressure regulator valve (H), reduction valve (G), throttle valve (K), locking solenoid valve (A1), odd number retaining clutch solenoid valve (D1), even number retaining clutch solenoid valve (D2), 1 retaining solenoid valve (B1), 3 retaining solenoid valves (B2), 4 retaining solenoid valves (B3), 2 retaining solenoid valves (B4), 5 retaining solenoid valves (C1), neutral solenoid valve (C2), 6 keeps off solenoid valves (C3) and the solenoid valve (C4) that reverses gear is fixedly mounted on the interior valve plate of oil sump; Filter cleaner is fixedly mounted in the oil sump; Oil cooler (F) is fixedly mounted on the housing of dual-clutch transmission (3) with oil pump (30).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100039962A CN102518796A (en) | 2012-01-09 | 2012-01-09 | Automatic hydraulic dual-clutch gear-shifting system |
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| CN103542017A (en) * | 2013-10-25 | 2014-01-29 | 天津同步动力科技有限公司 | Wet-starting dry-running clutch |
| CN106051142A (en) * | 2015-04-09 | 2016-10-26 | 本田技研工业株式会社 | Control device of vehicle automatic transmission |
| CN107061723A (en) * | 2017-05-11 | 2017-08-18 | 陕西法士特齿轮有限责任公司 | A kind of hydraulic control system of automatic speed changer |
| CN108105342A (en) * | 2016-11-24 | 2018-06-01 | 格特拉克·福特传动系统有限公司 | Manual transmission with oil pump |
| CN108458105A (en) * | 2018-04-19 | 2018-08-28 | 湖北文理学院 | A kind of auto-manual transmission |
| CN110360311A (en) * | 2019-08-23 | 2019-10-22 | 河南科技大学 | Tractor hydraulic mechanical type double-clutch automatic gearbox and control method |
| CN110360311B (en) * | 2019-08-23 | 2024-07-09 | 河南科技大学 | Hydraulic mechanical double clutch automatic transmission of tractor and control method |
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Application publication date: 20120627 |