Idle speed control apparatus for internal combustion engine

Details Idle speed control apparatus for internal combustion engine Idle speed control apparatus for internal combustion engine

2006-04-05

2010-10-05

Vo, Hieu T (Department: 3747)

Internal-combustion engines

Engine speed regulator

By changing valve lift

C123S339100

Reexamination Certificate

active

07806105

ABSTRACT:
When it is determined that an engine speed NE rapidly decreases (positive outcome at S210), a throttle increase amount TAu and a valve lift increase amount VLu are computed based on a decrease rate NEd of the engine speed NE (S220). Then, a target throttle opening degree TAt of a throttle valve and a target maximum valve lift VLt of an intake valve are increased by using the throttle increase amount TAu and the valve lift increase amount VLu (S230). As a result, a drop in the engine speed during idling is reliably suppressed.

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