Internal combustion engine having at least two inlet valves per combustion chamber
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United States of America Patent
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May 30, 1989
Grant Date -
N/A
app pub date -
May 20, 1988
filing date -
May 20, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the embodiment of the invention described in the specification, two inlet valves associated with a cylinder of an internal combustion engine are supplied through two separate inlet lines. One of the inlet valves is supplied with air and fuel at all engine speeds, and the other inlet valve is supplied with supplementary air at higher engine speeds only. The valve opening curves are so chosen that gas return flows are avoided in the case of the gas and air inlet valve, and a scavenging effect is achieved by maintaining the supplementary air inlet valve open for a longer time.
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