Patent ID: 7913817
Filing Date: 2011-03-29
Classification: F01M,F02B

Abstract:
1. An oil pump unit for an internal combustion engine, comprising: a case cover on an outside of a crankcase via a spacer, an oil tank chamber being formed by an inside surface of the case cover and the spacer, wherein the spacer is formed inside an outer circumferential wall thereof with a division wall that partitions the oil tank chamber from a crank chamber and with a pump case half-body portion, which is a portion of a pump case for an oil pump, a pump case half-body is joined to the pump case half-body portion to form the pump case, and the pump case half-body portion is formed in a lower portion thereof with an oil suction port in communication with a bottom portion of the oil tank chamber, wherein the pump case half body is used as a partition plate, the pump case half-body portion of the spacer is joined to one lateral surface of the partition plate to form the pump case of the oil pump, a second pump case half-body is joined to the other lateral surface of the partition plate to form a second pump case of a second oil pump, and wherein a portion of the pump case half-body which forms the second pump case together with the second pump case half-body and which protrudes from the pump case half-body portion is bored with a second oil pump discharge port of the second oil pump, and the division wall of the spacer is formed with a tank supply port in communication with the second oil pump discharge port.