Control system for automotive vehicle equipped with automatic tr

Details Control system for automotive vehicle equipped with automatic tr Control system for automotive vehicle equipped with automatic tr

1995-02-06

1996-05-28

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Clutch control

With brake control

477166, 477181, B60K 4102

Patent

active

055205941

ABSTRACT:
In order to prevent occurrence of engine stall even when a quick braking is made in a state where a torque converter of an automatic transmission is locked up, the torque converter is locked up in accordance with a throttle opening degree and a vehicle speed, and the lock-up is released at least when the braking operation is carried out. The opening degree B of an idle speed control valve (ISCV) for bypassing a throttle valve simultaneously with the lock-up is set, and the opening degree B is set as an actual control opening degree IV of ISCV when the opening degree B is larger than the opening degree IAV of ISCV which is set in accordance with the load of an engine. When the release of the lock-up is started, the actual control opening degree IV is gradually reduced to the opening degree IAV by a prescribed attenuation amount K. As a result, the engine stall due to a response delay to the release of the lock-up clutch can be prevented.

REFERENCES:
patent: 4484497 (1984-11-01), Hibino
patent: 4503956 (1985-03-01), Suzuki et al.
patent: 4711333 (1987-12-01), Okamura
patent: 4716999 (1988-01-01), Tezuka et al.
patent: 5010863 (1991-04-01), Ishida et al.
patent: 5385517 (1995-01-01), Hara et al.

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