Automatic transmission for automobiles

Details Automatic transmission for automobiles Automatic transmission for automobiles

1977-05-06

1979-01-16

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

041343131

ABSTRACT:
Automatic transmissions for automobiles include a hydraulic torque converter and a transmission gear mechanism which has a plurality of friction devices such as a clutch and brakes whereby a plurality of different driving stages can be provided through selective actuation of the friction devices. The automatic transmissions further include an over-drive system comprising at least an OD shift valve and a Low-High shift valve. The OD shift valve is applied through the L-H shift valve with a pressure sufficient to shift gear devices to a high speed position or a low speed position. A kick-down valve is disposed between the engine throttle position valve and the L-H shift valve to enable the pressure in the throttle line to increase when the kick down operation takes place.

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

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