F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/109, 74/94
F16H 61/662 (2006.01)
Patent
CA 1222888
SYSTEM FOR CONTROLLING THE TRANSMISSION RATIO OF AN INFINITELY VARIABLE TRANSMISSION Abstract of the Disclosure A system for an infinitely variable transmission having a primary pulley having a hydraulically shiftable disc and a hydraulic cylinder for shifting the disc, A secondary pulley having a hydraulically shiftable disc and a hydraulic cylinder for operating the disc, a belt engaged with both pulleys. A hydraulic circuit has a transmission ratio control valve comprising a spool for selectively shifting the disc of the primary pulley in the downshift direction and upshift direction, and a pressure regulator valve operatively connected to the hydraulically shiftable disc to detect transmission ratio during operation. A shift cam is provided for operating the transmission ratio control valve in dependence on throttle position. A throttle switch is provided to be closed when a throttle valve of the vehicle is widely opened for producing a signal, and a solenoid operated valve responds to the signal and a downshift valve operated in dependence on the operation of the solenoid operated valve so as to shift the spool of the transmission ratio control valve in the downshift direction. - 17 -
468819
Fuji Jukogyo Kabushiki Kaisha
Ridout & Maybee Llp
Van Doorne's Transmissie B.v.
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