| 摘要 |
PROBLEM TO BE SOLVED: To provide a piston cooling jet securing a pressure adjust passage, having fewer components, and allowing downsizing.SOLUTION: A piston cooling jet 1 includes: a housing 2; a nozzle 3 projecting outwardly from the housing 2 and capable of injecting oil O to a piston 91; a valve 4 capable of reciprocating inside the housing 2, and including a valve body 40 to which a load Fu is applied from a surface side by an oil pressure in an engine side oil passage 900 and a shaft 41 projecting from the valve body 40 to a rear side; a partition wall 5 arranged in the rear side of the valve body 40 and having a partition wall side hole 50 into which the shaft 41 is inserted; a pressure chamber 21 defined inside the housing 2 between the valve body 40 and the partition wall 5; a valve side oil passage 400 through which a surface side of the valve body 40 communicates with the pressure chamber 21; and a pressure adjust passage B defined between an inner circumferential face of the partition wall side hole 50 and an outer circumferential face of the shaft 41. |
