Shift shock system of automatic transmission

Details Shift shock system of automatic transmission Shift shock system of automatic transmission

2006-10-17

2006-10-17

Pang, Roger (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

Reexamination Certificate

active

07121978

ABSTRACT:
A shift shock reduction system comprises a first section that causes an engine to produce a normal engine torque in accordance with an existing operation condition of a vehicle; a second section that changes an output rotation of the engine to an output rotation of an automatic transmission in accordance with an existing gear ratio derived from a rate between a rotation speed of an input member of the transmission and that of an output member of the same; a third section that corrects the engine torque upon sensing start of a shift shock reduction operation; a fourth section that detects completion of the correction of the engine torque; and a fifth section that returns the corrected engine torque to the normal engine torque upon sensing the completion of the engine torque correction. The fourth section detects the completion of the engine torque correction by making reference to a change rate per time of the existing gear ratio.

REFERENCES:
patent: 5562567 (1996-10-01), Koenig et al.
patent: 5790968 (1998-08-01), Kashiwabara et al.
patent: 6023647 (2000-02-01), Saito et al.
patent: 6991584 (2006-01-01), Cowan
patent: 7048671 (2006-05-01), Morisawa et al.
patent: 2003/0100401 (2003-05-01), Kim
patent: 61-135831 (1986-06-01), None

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