Hydraulic control system of automatic transmission

Details Hydraulic control system of automatic transmission Hydraulic control system of automatic transmission

1994-03-25

1997-07-15

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477156, 477160, F16H 6104

Patent

active

056478208

ABSTRACT:
A hydraulic control system of an automatic transmission during a shift operation wherein a control pressure is controlled to selectively engage and release a plurality of frictional elements to establish a desirable shift stage comprising inertia phase detecting device for detecting a starting point of an inertia phase of the shift operation from one shift stage to another, and control pressure reducing device for gradually reducing the control pressure introduced to a frictional element to be engaged after the inertia phase is detected. The torque shock in the shift operation can be effectively reduced.

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patent: 5007308 (1991-04-01), Narita
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patent: 5168776 (1992-12-01), Otsubo et al.
patent: 5188005 (1993-02-01), Sankpal et al.
patent: 5282401 (1994-02-01), Hebbale et al.
patent: 5289741 (1994-03-01), Debs et al.
patent: 5429561 (1995-07-01), Wakahara et al.

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