Vehicles

Details Vehicles Vehicles

1978-05-01

1980-12-02

Herrmann, Allan D.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 357, F16D 3300, F16D 6700, B60K 4122

Patent

active

042366178

ABSTRACT:
A vehicle includes variable-ratio gearing driven via a hydrodynamic torque converter. The converter has a hydraulically-engaged lock-up clutch which is temporarily disengaged whenever a ratio is disengaged. The vehicle has a system of hydraulically-engaged clutches and brakes for changing ratio, and a system of hydraulically-engaged brakes for bringing the vehicle to rest. The respective operating pressures in the clutch-and-brake system and the braking system are independently modulated, in order more smoothly to change ratio or bring the vehicle to rest, by enabling a relief valve in each system to open against a determined spring force when pilot pressure exerted on each valve in the closing direction and derived from the operating cylinder of the lock-up clutch is temporarily cut off.

REFERENCES:
patent: 2736412 (1956-02-01), Livezey
patent: 2965202 (1960-12-01), Christenson
patent: 3262523 (1966-07-01), Gordon
patent: 3505907 (1970-04-01), Fox et al.
patent: 3897698 (1975-08-01), Ohsaka

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