System for controlling the transmission ratio of an...

Details System for controlling the transmission ratio of an... System for controlling the transmission ratio of an...

F - Mech Eng,Light,Heat,Weapons

16

H

74/224

F16H 9/12 (2006.01) F16D 48/06 (2006.01) F16H 61/662 (2006.01)

Patent

CA 1233045

SYSTEM FOR CONTROLLING THE TRANSMISSION RATIO OF AN INFINITELY VARIABLY TRANSMISSION Abstract of the Disclosure An infinitely variable transmission has a primary pulley having a hydraulically shiftable disc and a hydraulic cylinder for operating the disc, a secondary pulley having a hydraulically shiftable disc and a hydraulic cylinder for operating the disc, and a belt engaged with both pulleys. A hydraulic circuit having a transmission ratio control valve is provided for shifting the disc of the primary pulley in the downshift direction and upshift direction. The transmission ratio control valve is operated to shift the disc of the primary pulley in the downshift direction, when a throttle valve of an engine is rapidly opened for accelerating the engine.

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