Shift hydraulic apparatus for vehicular automatic transmission

Details Shift hydraulic apparatus for vehicular automatic transmission Shift hydraulic apparatus for vehicular automatic transmission

2006-04-11

2006-04-11

Lewis, Tisha (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

C477S050000, C475S127000

Reexamination Certificate

active

07025706

ABSTRACT:
A shift hydraulic apparatus and method are provided for a vehicular automatic transmission constituted by a torque converter and a continuously variable transmission. A bypass circuit enables an upstream side hydraulic circuit of the hydraulic circuit to communicate with a downstream side hydraulic circuit. A switching valve enables a switching between a communication state of the bypass circuit and a non-communication state thereof. Through the switching valve, both communication state and the non-communication state of the bypass circuit are controlled.

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A. Fujikawa et al., “Hydraulic and Electronic Control System of CVT for Hybrid Vehicle”, Society of Automotive Engineers of Japan, Inc., pre-publication No. 20005220, May 24, 2000, pp. 1-4.

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