Control device for motor road vehicle automatic change-speed...

F - Mech Eng,Light,Heat,Weapons – 16 – H

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F16H 59/12 (2006.01) F16H 59/10 (2006.01)

Patent

CA 1109696

S P E C I F I C A T I O N CONTROL DEVICE FOR MOTOR ROAD VEHICLE AUTOMATIC CHANGE-SPEED TRANSMISSION MECHANISM ABSTRACT OF THE DISCLOSURE This control device for automatic change-speed transmission mechanism of motor road vehicles has a control keyboard of which the keys control the energization of switches coope- rating with cam faces formed on an axially movable detector shaft the translation of which is controlled by means of a rotary cam rigid with the selector shaft of the change- speed mechanism, this cam comprising an integral radial arm responsive to a double-acting pneumatic cylinder responsive in turn to a pair of solenoid valves adapted to be energized for moving the piston of the pneumatic cylinder in one or the other direction as a function of the specific key de- pressed by the driver in order to provide the desired range of speed ratios, or the neutral position, or the reverse gear.

342691

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