System and method for controlling engine idle speed of...

Details System and method for controlling engine idle speed of... System and method for controlling engine idle speed of...

2006-02-07

2006-02-07

Pang, Roger (Department: 3681)

Interrelated power delivery controls, including engine control

Clutch control

Engine controlled by clutch control

C477S110000

Reexamination Certificate

active

06994654

ABSTRACT:
System and method for controlling idle speed for a vehicle including an internal combustion engine coupled to an automatic transmission which has a torque converter. The system includes a sensor operative to detect a parameter based on a torque converter speed ratio and generate a signal indicative of the parameter detected, and a controller programmed to determine basic idle speed, determine a target idle speed by correcting the basic idle speed based on the signal when the automatic transmission is in a drive range in engine idling condition. The method includes determining basic idle speed when the automatic transmission is in a drive range in engine idling condition, detecting a parameter based on a torque converter speed ratio, and determining a target idle speed by correcting the basic idle speed based on the parameter.

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patent: 2000-45834 (2000-02-01), None

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