Automatic transmission control system for automobiles

Details Automatic transmission control system for automobiles Automatic transmission control system for automobiles

1994-05-31

1996-12-03

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477150, 477162, F16H 6104, F16H 6106, F16H 6108

Patent

active

055803334

ABSTRACT:
An automatic transmission control system for selectively locking and unlocking a plurality of frictional coupling elements is provided within an automatic transmission so as to place the automatic transmission into one of various possible gears. The control locks a specific one of the frictional coupling elements with locking pressure when the automatic transmission performs a specific gear shift and unlocks it by reducing the locking pressure when causing it to perform, an opposite gear shift reverse to the specific gear shift. The locking pressure is increased by way of a relatively high level of shelf pressure during the specific gear shift and reduced by way of a relatively low level of shelf pressure during the opposite gear shift.

REFERENCES:
patent: 4033203 (1977-07-01), Hirosawa et al.
patent: 4539870 (1985-09-01), Sugano
patent: 4949597 (1990-08-01), Ueki et al.
patent: 5033330 (1991-07-01), Okahara
patent: 5038637 (1991-08-01), Sugano
patent: 5113724 (1992-05-01), Hayasaki
patent: 5224399 (1993-07-01), Baba et al.
patent: 5291804 (1994-03-01), Kashihara et al.

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