Valve control of internal combustion engines by means of a rotary piston pump with unequal pumping output
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United States of America Patent
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Jan 30, 1990
Grant Date -
N/A
app pub date -
Aug 26, 1988
filing date -
Aug 26, 1987
priority date (Note) -
Expired
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Abstract
A rotary piston pump assembly includes a rotary piston pump having first, second and third sectors. Pistons successively pass through the first, the second and the third sectors during one rotation. The pump has a pump output equal to zero during passage of the pistons through the first sector.
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