Patent ID: 9556765
Date: 2017-01-31
CPC Classifications: F01L,F01M,F16K

Claim:
1. A hydraulic oil supply apparatus comprising: an oil pump configured to be driven by a rotation of an engine to discharge a hydraulic oil; a common oil passage through which the hydraulic oil discharged from the oil pump flows; a branch point at which an end portion of the common oil passage is branched into two oil passages; a first oil passage extending from the branch point, the first oil passage through which a portion of the hydraulic oil flowing through the common oil passage flows to be supplied to a first portion; a second oil passage extending from the branch point, the second oil passage through which the rest of the hydraulic oil flowing through the common oil passage flows to be supplied to a second portion different from the first portion; a first flow control valve provided at a portion of the first oil passage and including a first valve body changing a volume of the hydraulic oil flowing through the first oil passage and a first biasing member applying a biasing force to the first valve body, the first flow control valve being operated to decrease a flow area of the hydraulic oil flowing through the first oil passage and to increase a flow area of the hydraulic oil flowing through the second oil passage as a hydraulic pressure of the hydraulic oil discharged from the oil pump increases; and a housing including an inner void within which the first valve body and the first biasing member are inserted, wherein the volume of the hydraulic oil flowing through the first oil passage is reduced by an application of a hydraulic pressure generated from the hydraulic oil passing through the first valve body as a force to move the first valve body against the biasing force of the first biasing member, the first flow control valve comprises a first valve communicating with the first oil passage, and a second valve communicating with the second oil passage, the first valve includes a first inflow bore and a first outflow bore, which are formed in the housing, and a first recess portion formed in the first valve body, the second valve includes a second inflow bore and a second outflow bore, which are formed in the housing, and a second recess portion formed in the first valve body, and an area at which the second inflow bore, the second outflow bore, and the second recess portion face one another increases when hydraulic pressure of hydraulic oil discharged from the oil pump increases to move the first valve body.