Method of affecting mixture formation and charge motion in an engine cylinder
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United States of America Patent
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Issued Date -
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app pub date -
Jan 25, 2001
filing date -
Jul 31, 1997
priority date (Note) -
Abandoned
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Abstract
A method of affecting the mixture formation and motion of a charge in an engine cylinder during a suction cycle of a gas intake valve of the cylinder. The suction cycle has a first cycle portion and a subsequent, second cycle portion. The method includes the following steps: introducing air and fuel into the cylinder during the suction cycle; maintaining, during the first cycle portion, the gas intake valve in a first open position at full valve stroke in which the gas intake valve has a fully open cross-sectional flow passage area; and maintaining, during the second cycle portion, the intake valve in a second open position at a partial stroke of the gas intake valve. The partial stroke is less than one half of the full stroke; and in the second open position the gas intake valve has a partially open cross-sectional flow passage area.
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