Engine idle rotation speed controller

Details Engine idle rotation speed controller Engine idle rotation speed controller

1997-10-10

1999-04-13

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

F02D 2902, F02D 4108

Patent

active

058938168

ABSTRACT:
A rotation speed is feedback controlled to a target rotation speed during idle running of an engine. When an automatic transmission is in a travel range, a brake is being operated and a vehicle speed is less than a predetermined value, the target rotation speed is decreased. A required vehicle creep force is different according to whether the vehicle has substantially stopped such as when it is waiting on a crossing, or whether it is moving in the idle running state as when it is being garaged or is following a vehicle in front of it in a traffic jam. By decreasing the target rotation speed according to the vehicle speed, an optimum creep force is obtained in both cases.

REFERENCES:
patent: 4563989 (1986-01-01), Peter
patent: 4580535 (1986-04-01), Danno et al.
patent: 4653622 (1987-03-01), Miyake
patent: 4966111 (1990-10-01), Fujimoto et al.
patent: 5460580 (1995-10-01), Streib
patent: 5549525 (1996-08-01), Wendel

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