Hydromechanical transmission employing lockup clutch

Details Hydromechanical transmission employing lockup clutch Hydromechanical transmission employing lockup clutch

1981-03-03

1983-06-21

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With additional drive or clutch

192 331, 192 358, 192 8712, F16D 2510

Patent

active

043889875

ABSTRACT:
A transmission system particularly usable for transmitting power from an internal combustion engine to the driving wheels of a vehicle such as a tractor includes a multiple ratio mechanical range transmission coupled to an infinitely variable ratio hydromechanical transmission via a manually operable master clutch. A high slip fluid coupling is used to couple the hydromechanical transmission to the engine, and an electronically controlled lockup clutch locks the impeller of the fluid coupling to the output turbine when the speed of the engine exceeds a first predetermined speed, and maintains the coupling locked until the speed of the engine drops below a second substantially lower predetermined speed.

REFERENCES:
patent: 3390594 (1968-07-01), Gillespie
patent: 3949847 (1976-04-01), Hoehn
patent: 4056177 (1977-11-01), Ahlen et al.
patent: 4131184 (1978-12-01), Rumyantsev et al.
patent: 4208929 (1980-06-01), Heino et al.

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