HIGH-PRESSURE FUEL PUMP UNIT FOR IN-CYLINDER INJECTING TYPE ENGINE

摘要

The high-pressure fuel pump unit for an in-cylinder injecting type engine of the invention comprises high-pressure fuel pump 3 which has a casing 40 having a sucking path and a discharge path, a cylinder 41 provided in the casing 40 and having a sliding hole 41 a, a fuel pressurizing chamber 45 formed on a part of the sliding hole 41 a, and a plunger 43 arranged reciprocally movably in the sliding hole 41 a, sucks the fuel from the sucking path into the fuel pressurizing chamber 45 through reciprocation of the plunger 43, and discharges the pressurized fuel from the discharge path, and pressure-feeds the same to a fuel injector 1 of an in-cylinder injecting type engine; a damper 30 which is provided integrally with the high-pressure fuel pump 3 and absorbs pulsation of the fuel pressure caused by the high-pressure fuel pump 3 in the low-pressure fuel path; and an accumulator 70 which is provided integrally with the high-pressure fuel pump 3 and absorbs pulsation of pressure of the fuel discharged by the high-pressure fuel pump 3.