F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/168, 180/47,
F16H 61/02 (2006.01) F16H 59/08 (2006.01) F16H 61/70 (2006.01)
Patent
CA 1298758
ABSTRACT OF THE DISCLOSURE A hydraulic control system for a transmission including a speed transmission assembly, a range transmission assembly, and a hydraulically actuated master clutch for selectively coupling said transmission assemblies. The speed transmission assembly includes a plurality of hydraulically actuated clutch assemblies for effecting different forward output speeds and at least one reverse output speed. The range transmission assembly also includes a plurality of hydraulically actuated clutch assemblies. The control system includes a valve body connected to a hydraulic source of fluid pressure. A plurality of control valves are positioned in the valve body by an operator controlled shift lever. The control valves direct fluid pressure to various clutch assemblies in the speed and range transmission assemblies to condition the transmission into a forward, reverse, or neutral mode of operation as a function of shift lever position. The control system further includes hydraulic logic for modulating master clutch operation as a function of various transmission operating conditions.
590285
Cnh America Llc
Gowling Lafleur Henderson Llp
LandOfFree
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