In-cylinder injection type spark-ignition internal combustion engine and method
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United States of America Patent
Stats
-
Oct 21, 2003
Grant Date -
Jan 10, 2002
app pub date -
Jun 25, 2001
filing date -
Jun 28, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an in-cylinder injection spark-ignition internal combustion engine including a plurality of cylinders and a catalyst device disposed in an exhaust system of the engine, a fuel is injected to at least one selected cylinder selected from the plurality of cylinders to be operated, and subsequently the fuel is injected to all cylinders to be operated. At this time, a warm-up controlled variable for the at least one selected cylinder is smaller than the warm-up controlled variable used when all cylinders are operated. In the in-cylinder injection spark-ignition internal combustion engine, the all cylinder operation is started and the warm-up control is started for all cylinders to warm up the catalyst device disposed in the exhaust system of the engine preferably when a fuel injection pressure exceeds a target value.
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