Patent ID: 9010282
Filing Date: 2015-04-21
Classification: F01M,F01P

Abstract:
1. A piston cooling jet comprising: a housing; a nozzle provided to project outward from the housing and capable of spraying oil toward a piston; a valve capable of moving reciprocally inside the housing and configured to receive a load due to a hydraulic pressure in an engine-side oil passage applied from a front side of the valve, the valve including a valve-side oil passage that communicates with the engine-side oil passage; a pressure chamber defined inside the housing on a back side of the valve, the pressure chamber communicating with the valve-side oil passage; a pressure adjusting passage disposed between the pressure chamber and a space outside the housing; and a filter disposed in the valve and configured to remove foreign matter that cannot pass through the pressure adjusting passage from oil passing through the valve-side oil passage, wherein the piston cooling jet is switchable between a valve closed state in which communication between the engine-side oil passage and the nozzle is prohibited, and a valve open state in which communication between the engine-side oil passage and the nozzle is allowed with the valve moved toward the back side to reduce a volume of the pressure chamber compared to that in the valve closed state.