VARIABLE OIL PUMP OF VEHICLES, CAPABLE OF IMPROVING NVH(Noise, Vibration, Harshness) PERFORMANCE BY REDUCING SUDDEN PRESSURE CHANGES OF OIL IN A HIGH-PRESSURE DISCHARGE PART

摘要

PURPOSE: A variable oil pump of vehicles is provided to improve NVH performance of the vehicles and the variable oil pump by decreasing rapid pressure changes of oil in a high-pressure discharge part through an edge groove and an extended part.;CONSTITUTION: A variable oil pump of vehicles comprises a pump housing(110), an outer ring(120), an elastic body(140), a rotor(150), a plurality of vanes(160) and a cover. The pump housing comprises a pivot(111). The outer ring is connected to pivot and rotated around the pivot. The elastic body offers returning forces to the outer ring. A plurality of the vanes is installed on an outer surface of the rotor radially. The cover shuts down the pump housing. Engine oil suctioned from a low-pressure portion(L) of one inner side of the outer ring is discharged to a high-pressure portion(H) of the other inner side of the outer ring through a compression section(C) of the center inside. A groove is formed on an inner surface of the outer ring. An involute hole corresponding to the high pressure portion is formed in the cover. An extended part is formed in one side of the groove of the outer ring and extended to the low-pressure suction part.;COPYRIGHT KIPO 2012