Method and apparatus for actuating vehicle transmissions

Details Method and apparatus for actuating vehicle transmissions Method and apparatus for actuating vehicle transmissions

F - Mech Eng,Light,Heat,Weapons

15

B

142/27, 138/78

F15B 13/02 (2006.01) F16H 61/28 (2006.01) F16H 61/682 (2006.01)

Patent

CA 1215895

ABSTRACT OF THE DISCLOSURE A vehicle transmission system has an internal lever for changing transmission gears, a select actuator for moving the internal gear to neutral positions Nl, N2 N3 in first direction, a shift actuator for moving the internal lever to 1st - 5th gear positions and a reverse position in second direction substantially normal to the first direction, and a clutch actuator for actuating a clutch. While any one of the actuators is in operation, the pressure of a fluid discharged from the operating actuator is prevented from acting on the select actuator and/or the shift actuator which is not in operation by applying a fluid pressure to the inoperative select actuator and/or the shift actuator to fix the actuator or actuators in a current position agaisnt operation, thereby allowing the transmission gears to be changed accurately and smoothly.

438501

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