Control apparatus and method for automatic transmission

Details Control apparatus and method for automatic transmission Control apparatus and method for automatic transmission

1998-10-15

2000-08-01

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 60, 701 61, 701 62, B60K 4108

Patent

active

060980036

ABSTRACT:
A control apparatus and method for an automatic transmission that prevents incorrect determination of the start of a gear change inertia phase caused by bounding of an input shaft speed, and that prevents delay of the detection of the start of the inertia phase. A working fluid pressure of the frictional element is feedback-controlled in an inertia phase of a gear change transition of a speed-changing gear mechanism, wherein the input shaft speed of the mechanism changes along with an engaging operation of a frictional element of the mechanism. When it is determined that a starting point for the inertia phase control has been reached, inertia phase control is initiated. After a predetermined determination interval subsequently elapses, it is determined whether the inertia phase control should continue.

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patent: 5790967 (1998-08-01), Kull et al.
patent: 5848370 (1998-12-01), Kozaki et al.

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