Air-fuel ratio control system for multi-cylinder engine
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United States of America Patent
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-
Oct 19, 2004
Grant Date -
Jul 3, 2003
app pub date -
Dec 18, 2002
filing date -
Dec 27, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An engine control system has a controller and intake control devices for controlling air amount introduced into each of the cylinders. The controller has a lean burn control block and a warm up control block. Both blocks operate two cylinders under a lean air-fuel ratio, and operate remaining two cylinders under a rich air-fuel ratio. Both blocks control at least the intake control devices to adjust air-fuel ratio.
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