Apparatus Having Control Valve and Variable Capacitance Pump and Hydraulic Pressure Circuit of Internal Combustion Engine in which the Same Apparatus is Used

A control valve apparatus comprising:

• a hydraulic pressure circuit including:
• an introduction passage (15a) into which oil is introduced from an oil pump;
• a main passage (15b) installed at a downstream side of the introduction section and communicated with a supply passage (20) through which oil is supplied to each lubricating section of an internal combustion engine;
• a branch passage branched from the main passage and through which oil is supplied to a hydraulic pressure actuator:
• and a control valve (22) having a valve body (29) which is moved to control an oil flow quantity to the supply section, wherein the control valve comprises:
• a biasing member (30) configured to bias the valve body in a direction for the flow quantity to the supply section to be decreased;
• a pressure receiving section (29c) configured to receive a pressure at an upstream side of the valve body to move the valve body against a biasing force of the biasing member;
• a bypass passage (70) communicating between the upstream side of the valve body and a downstream side of the valve body;
• and a relief valve (75) installed on the bypass passage to increase a flow quantity of oil passing through the bypass passage when a pressure of an upstream side of the valve body is equal to or higher than a pressure under which the valve is moved against the biasing force of the biasing member.