VENTILATION SYSTEM AND METHOD FOR SUPERCHARGE ENGINE
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United States of America Patent
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Issued Date -
Dec 22, 2011
app pub date -
Jun 13, 2011
filing date -
Jun 17, 2010
priority date (Note) -
Abandoned
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Abstract
In ventilation system and method for a supercharge engine, in a middle load driving region of the engine in which the boost pressure of position of an intake air passage located at the downstream side with respect to a throttle valve is positive and is lower than a set pressure (P1), with importance placed on the ventilation of a crank chamber, a relatively large quantity of fresh air is introduced into the crank chamber and, on the other hand, in a high load driving region in which the boost pressure is equal to or higher than the set pressure (P1), with importance placed on the engine output, the large quantity of fresh air is supplied to the engine so that, while the deterioration of engine oil within the crank chamber suppressed, the output reduction of the engine in the high load driving region can be suppressed.
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