Gas flow rate control system for internal combustion engine
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United States of America Patent
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-
Aug 15, 1989
Grant Date -
N/A
app pub date -
Dec 23, 1986
filing date -
Dec 24, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A gas flow rate control system for controlling the flow rate of blow-by gas to be recirculated back to the combustion chamber in an internal combustion engine. The gas flow rate control system comprises a PCV valve disposed in a gas flow passage through which blow-by gas flows in the direction of the engine combustion chamber. A bypass passage is formed in such a manner as to connect the upstream side and the downstream side of the flow control section of the control valve in the gas flow passage. A bypass control valve is disposed in the bypass passage to control the flow of blow-by gas through the bypass passage in response to an engine operating parameter such as intake manifold vacuum, thereby compensating the control characteristics of the PCV valve in order to achieve precise control of the amount of recirculated blow-by gas in accordance with engine operating conditions.
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