Engine lubricating oil supply device
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United States of America Patent
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Nov 17, 2015
Grant Date -
Sep 27, 2012
app pub date -
Dec 7, 2009
filing date -
Dec 7, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
An engine lubricating oil supply device (1) according to the present invention is configured such that a connection hole (45) is opened and closed by a ball valve element (53) based on a balance between a biasing force of a shape memory spring (51) which changes in accordance with the temperature of the lubricating oil and a hydraulic pressure of the lubricating oil flowing into a piston chamber (31) such that the lubricating oil flowing into an accommodating space (44) from the connection hole (45) is drained via a second drain oil passage (46), thereby adjusting the degree of opening of a first drain oil passage (34) by causing a piston (35) to slide on the basis of a balance between a biasing force of a valve spring (39) and a pressure differential between an upstream chamber (32) and a downstream chamber (33) which is generated in accordance with a flow of the lubricating oil passing through an orifice (38).
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