Patent ID: 7322318
Filing Date: 2008-01-29
Classification: F01M,F01P,F02F

Abstract:
1. A piston cooling system in an internal combustion engine, the engine comprising: a crankshaft; a crankcase comprising at least one journal wall that journals the crankshaft; a cylinder block comprising at least one cylinder bore; and a piston reciprocally disposed in the at least one cylinder bore, the piston cooling system comprising: an oil jet disposed in a wall portion of said crankcase; an oil supply passage formed in the crankcase in fluid communication with said oil jet, for routing oil from a hydraulic supply source oil to the oil jet; and an oil reservoir formed in the at least one journal wall, the oil reservoir communicating with the oil supply passage, wherein said piston cooling system is configured to jet oil from the oil supply passage to the piston via the oil jet during operation of said engine.