Oil control valve and variable valve lift system provided with the same
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United States of America Patent
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Aug 25, 2015
Grant Date -
Nov 22, 2012
app pub date -
Dec 6, 2011
filing date -
May 16, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An oil control valve includes a housing having a control port and a drain port, a first seat with a first penetration hole forming a first chamber, a second seat with a second penetration hole forming a second chamber communicated with the control port, the second seat with the housing forming a third chamber communicating with the drain port, a first check valve within the first chamber selectively closing the first penetration hole, a second check valve within the third chamber selectively closing the second penetration hole, and a third penetration hole, a control portion selectively opening the first check valve and simultaneously closing the second check valve or selectively closing the first check valve and simultaneously opening the second check valve and an orifice connecting the first chamber with the second chamber.
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