Automatic transmission for automobiles

Details Automatic transmission for automobiles Automatic transmission for automobiles

1977-05-06

1979-01-30

Wyche, Benjamin W.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

B60K 4106

Patent

active

041365844

ABSTRACT:
Automatic transmission for automobiles including a hydraulic torque converter and a transmission gear mechanism which has a plurality of friction devices such as clutch and brakes whereby a plurality of different driving stages can be provided through selective actuation of the friction devices. Trimmer valve is provided for each actuator of the friction device to provide a supply of gradually increasing hydraulic pressure. The trimmer valve is applied at its return port with a pressure corresponding to the engine throttle valve position so that the initial pressure to be applied to the actuator is determined in accordance with the engine throttle valve position.

REFERENCES:
patent: 3691872 (1972-09-01), Schaefer et al.
patent: 4046162 (1977-09-01), Rodeghiero

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