Patent ID: 7588011
Filing Date: 2009-09-15
Classification: F04C

Abstract:
1. An oil supplying apparatus for an engine, comprising: a pump body including an inlet port sucking working oil in response to a rotation of a rotor driven synchronously with a crankshaft and an outlet port discharging the working oil in response to the rotation of the rotor; a first oil path connected to the outlet port and supplying the working oil from the outlet port to a portion to be supplied with the working oil; an oil pressure control valve connected to the first oil path via an intermediate oil path and operating in response to an oil pressure of the working oil in the first oil path; a second oil path connected to the outlet port at an upstream side relative to a connecting portion between the outlet port and the first oil path and supplying the working oil from the outlet port to the oil pressure control valve; a relief oil path connecting a first connecting path and a second connecting path to the oil pressure control valve and returning the working oil of the oil pressure control valve to at least one of the inlet port and an oil pan; and a valve body oil path provided at a valve body of the oil pressure control valve; wherein the second oil path and the relief oil path are closed by the valve body of the oil pressure control valve when oil pressure of the working oil in the first oil path is within a first pressure range so that the working oil from the outlet port is supplied to the first oil path; the working oil from the outlet port is supplied to the first oil path and is supplied to the relief oil path via the second oil path, the valve body oil path of the oil pressure control valve, and the first connecting path when the oil pressure of the working oil in the first oil path is within a second pressure range which is greater than the first pressure range; the second oil path and the relief oil path are closed by the valve body of the oil pressure control valve and the working oil from the outlet port is supplied to the first oil path when the oil pressure of the working oil in the first oil path is within a third pressure range which is greater than the second pressure range; and the working oil from the outlet port is supplied to the first oil path and is supplied to the relief oil path via the second connecting path by closing the second oil path and the first connecting path by the valve body of the oil pressure control valve and by establishing the communication between the intermediate oil path and the relief oil path at the oil pressure control valve when the oil pressure of the working oil in the first oil path is within a fourth pressure range which is greater than the third pressure range.