LUBRICATING DEVICE FOR CAM OF HIGH-PRESSURE FUEL PUMP

摘要

PROBLEM TO BE SOLVED: To enhance lubrication efficiency of surface of pump driving cam in 2-cycle engine of in-cylinder fuel injection system made to drive high-pressure pump directly by crank shaft. SOLUTION: Fuel is injected from injector 21 into 2-cycle-engine cylinder and high-pressure fuel pump 24 supplying fuel to injector 21 is so made to be driven directly by crank shaft 3. Crank shaft 3 is provided with cam surface 63 contacting plunger 25 of high-pressure fuel pump 24, and lubricating oil from oil pump is supplied to cam surface 63. Oil bath 68 is formed in crank case 2 for storing lubricating oil supplied, surface of which comes in contact with cam surface 63.