Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1993-01-28
1995-03-21
Wright, Dirk
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477164, 477152, F16H 6104
Patent
active
053991311
ABSTRACT:
An automatic transmission control system includes a hydraulic circuit for controlling coupling pressure supplied to frictional coupling elements of the automatic transmission, which are selectively coupled and uncoupled so as to shift the automatic transmission into desired gears. The hydraulic circuit has a solenoid valve, for regulating a principal hydraulic pressure to provide a control pressure in accordance with vehicle driving conditions. The coupling pressure, supplied to a frictional coupling element, is regulated by a regulating valve in accordance with a control pressure level, and during shifting of the automatic transmission, is supplied through an accumulator whose back pressure is controlled in accordance with the control pressure by a control valve.
REFERENCES:
patent: 4722250 (1988-02-01), Sumiya et al.
patent: 4838126 (1989-06-01), Wilfinger et al.
patent: 5012699 (1991-05-01), Aoki et al.
patent: 5020393 (1991-06-01), Kuwayama et al.
patent: 5078028 (1992-01-01), Ishikawa et al.
Kamada Shinya
Kuriyama Minoru
Mori Kyosuke
Sumimoto Takayuki
Mazda Motor Corporation
Ta Khoi Q.
Wright Dirk
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