Engine overrun preventing system for a vehicle

Details Engine overrun preventing system for a vehicle Engine overrun preventing system for a vehicle

1994-10-19

1997-03-11

Friedman, Carl D.

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

477107, B60K 4104

Patent

active

056095473

ABSTRACT:
An engine overrun preventing system for a vehicle, in which the overrun of an engine is prevented when the overrun of the engine is detected, by (i) switching a lock-up system provided in a torque convertor OFF to cause a slip, if it is detected that the lock-up system is in its ON state; (ii) shifting a transmission into a speed range which is one grade lower than a presently selected speed range and reducing vehicle speed by engine brake, if it is detected that the lock-up system is in its OFF state and that the transmission is placed in another speed range than a first speed; and (iii) actuating a brake to reduce vehicle speed, if it is detected that the lock-up system is in its OFF state and that the transmission is placed in the first speed and if a detected vehicle speed is equal to a predetermined vehicle speed or more.

REFERENCES:
patent: 4133326 (1979-01-01), Cops et al.
patent: 5287773 (1994-02-01), Nakawaki et al.

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