Automatic transmission control apparatus

Interrelated power delivery controls – including engine control – Transmission control – Control by sensed ambient condition – pattern indicia,...

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F16H 6106

Patent

active

056929919

ABSTRACT:
An automatic transmission control apparatus has an input clutch, a hydraulic servo for the clutch, a fluid temperature detector, an engine start detector, a range shift detector, and a control device for controlling the fluid pressure supply to the hydraulic servo. The control device raises the fluid pressure supply to the hydraulic servo on the basis of predetermined rising characteristics in normal operation. When it is determined that the shift has been performed for the first time since the start of the engine and it is determined that the fluid temperature is lower than a predetermined temperature, the control device rapidly raises the fluid pressure supply to the hydraulic servo up to the required engaging pressure.

REFERENCES:
patent: 4718525 (1988-01-01), Yamaguchi
patent: 4982622 (1991-01-01), Yamamoto et al.
patent: 5024125 (1991-06-01), Baba
patent: 5115694 (1992-05-01), Sasaki et al.
patent: 5182970 (1993-02-01), Goto et al.
patent: 5301572 (1994-04-01), Tanaka et al.
patent: 5303613 (1994-04-01), Kitagawa et al.
patent: 5385511 (1995-01-01), Iizuka

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