PLUNGER DRIVE STRUCTURE FOR FUEL PUMP AND NEEDLE ROLLER BEARING FOR SUPPORTING PLUNGER FOR FUEL PUMP

摘要

PPROBLEM TO BE SOLVED: To provide a plunger drive structure for a fuel pump which reduces torque loss during rotation and has high lubricity. PSOLUTION: A fuel pump 11 is equipped with a rotary shaft 12 having an eccentric part 12a, a needle roller bearing 13 for supporting the eccentric part 12a of the rotary shaft 12, a tappet 14 radially arranged by being abutted to an outer race of the needle roller bearing 13 and a plunger 15 arranged on the tappet 14 and reciprocating through rotation of the rotary shaft 12. PCOPYRIGHT: (C)2007,JPO&INPIT