Methods of Operating Low Emission High Performance Compression Ignition Engines
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United States of America Patent
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Issued Date -
Oct 30, 2008
app pub date -
Apr 29, 2008
filing date -
Apr 30, 2007
priority date (Note) -
Abandoned
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Abstract
Methods of operating low emission high performance compression ignition engines. After an expansion stroke during which combustion occurred, a predetermined amount of exhaust gas is trapped in the combustion chamber during the next compression stroke, typically by closure of an exhaust valve. Then fuel is injected into the combustion chamber, the amount of exhaust gas trapped being limited so that that compression stroke does not cause compression ignition. Then typically near the end of the following expansion stoke, air is injected so that compression ignition occurs at or near the end of the next compression stoke.
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