Control system for vehicle provided with automatic transmission

Details Control system for vehicle provided with automatic transmission Control system for vehicle provided with automatic transmission

1991-02-27

1992-05-26

Braun, Leslie A.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0033, 192 0076, 192 331, F16D 4322

Patent

active

051158965

ABSTRACT:
A vehicle is provided with an engine and an automatic transmission having a lockup mechanism which engages and disengages to directly connect and disconnect input and output shafts of a torque converter of the automatic transmission to and from each other. A control system for such a vehicle has a deceleration detecting circuit which detects that the engine is decelerating based on the engine speed and a throttle opening, and a lockup mechanism control circuit which causes the lockup mechanism to engage when the engine is decelerating and permits the same to disengage when the deceleration of the engine finishes. The control system inhibits the lockup mechanism control circuit from causing the lockup mechanism to disengage in a period in which the engine speed can temporarily fall because of the automatic transmission's shifting into neutral in the process of a downshift.

REFERENCES:
patent: 4373619 (1983-02-01), Schritt et al.
patent: 4618041 (1986-10-01), Sotoyama et al.
patent: 4640394 (1987-02-01), Higashi et al.
patent: 4730708 (1988-03-01), Hamano et al.
patent: 4783743 (1988-11-01), Yashiki et al.
patent: 4940122 (1990-07-01), Fujieda
patent: 4953679 (1990-09-01), Okino
patent: 4957194 (1990-09-01), Sawa et al.

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