| 摘要 |
PROBLEM TO BE SOLVED: To make open and close of an oil circulation channel of lubricating oil separated by a filter appropriate and easy. SOLUTION: An oil circulation pipe 26A is connected to a channel 232 in a downstream of a blow-by gas filter 24, an open close valve 27 is connected to the oil circulation pipe 26A, and an oil circulation pipe 26B is connected to the open close valve 27. Oil pressure in an oil channel 20 between an oil pump 18 and an oil filter 21 acts on a valve element 29 of the open close valve via an oil pressure pipe 34. Oil pressure in an oil pressure channel 33 energizes the valve element 29 from a close position toward an open position. The open close valve 27 under a close condition moves to make valve opening smaller as oil pressure increase, and shifts to an open condition when oil pressure gets to predetermined standard pressure or higher. COPYRIGHT: (C)2008,JPO&INPIT
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