Idle rotation control of an internal combustion engine

Details Idle rotation control of an internal combustion engine Idle rotation control of an internal combustion engine

2006-01-31

2006-01-31

Solis, Erick (Department: 3747)

Internal-combustion engines

Engine speed regulator

Idle speed control

C123S339160

Reexamination Certificate

active

06990953

ABSTRACT:
A controller21controls an intake air flow rate via an electronic throttle14based on a feedback correction amount set so that a rotation speed (NE) of an internal combustion engine (11) during idle running gradually approaches a target value (tNE). When the deviation (ΔNE) between the rotation speed (NE) and the target value (tNE) becomes equal to or greater than a predetermined value (XNE), increase correction of the intake air flow rate is performed according to the deviation (ΔNE). When the deviation (ΔNE) falls below the predetermined value (XNE), a value corresponding to the increase correction amount at that time is added to the feedback correction amount, and subsequent increase correction amounts are set to zero, so the decreased engine rotation speed (NE) can be returned to the target value (tNE) with a rapid response, and future drops of the returned engine rotation speed (NE) are prevented.

REFERENCES:
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patent: 2004/0221833 (2004-11-01), Shepperson
patent: 09-068084 (1997-03-01), None

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