Patent ID: 6378483
Filing Date: 2002-04-30
Classification: F01L,F01M,F02B,F02F

Abstract:
A four-cycle engine having a lubrication system, the engine comprising a cylinder block, the cylinder block having at least one cylinder, a piston arranged for reciprocation within the cylinder and connected to an output shaft, a head assembly connected to the cylinder block, at least one combustion chamber defined between the head assembly and the piston, at least one intake port and at least one exhaust port communicating with the combustion chamber, an intake valve capable of closing and opening the intake port, an exhaust valve capable of closing and opening the exhaust port, a valve actuating mechanism that includes an intake cam shaft capable of moving the intake valves and an exhaust cam shaft capable of moving the exhaust valves, a head cover positioned over the valve actuating mechanism and defining, in part, a cam chamber, the lubrication system comprising a baffle plate unit located within the cam chamber above the valve actuating mechanism, the baffle plate unit includes a baffle plate that at least partially defines a path leading towards a discharge port for blow-by vapors from the combustion chamber, the baffle plate unit including a lubricant passageway that receives lubricant from the lubrication system of the engine, the lubricant passageway configured for supplying lubricant to the valve actuating mechanism.