Apparatus having control valve and variable capacitance pump and hydraulic pressure circuit of internal combustion engine in which the same apparatus is used

摘要

In a hydraulic pressure circuit including an introduction section through which oil is introduced, a main passage section installed at a downstream side of the introduction section to be communicated with a supply section through which oil is supplied to each of slide sections of an internal combustion engine, a branch passage branched from the main passage section to supply oil to a hydraulic pressure actuator, and a control valve having a valve body which is moved in accordance with a pressure of an upstream side thereof, and a variable capacitance pump configured to drain oil to the introduction section, the variable capacitance pump is configured to vary a drained flow quantity in accordance with the drained pressure of oil and a pressure under which the oil drained flow quantity is started to be varied is higher than a pressure under which the valve body is started to move.

主权项

1. A control valve apparatus comprising:
a variable capacitance pump configured to vary a drained flow quantity in accordance with a drained pressure of oil; a hydraulic pressure circuit including an introduction section through which oil is introduced from the variable capacitance pump, a main passage section communicated with a supply section supplying oil to each slide section of an internal combustion engine, and a branch passage section branched from the main passage section to supply oil to a hydraulic pressure actuator; and a control valve installed in the hydraulic pressure circuit to control an oil flow quantity from the introduction section to the supply section by moving a valve body of the control valve in accordance with a hydraulic pressure of the introduction section, wherein the hydraulic pressure circuit includes the variable capacitance pump and the control valve sets the hydraulic pressure (Pv) of the introduction section under which the valve body of the control valve begins to move to start a communication between the main passage section at the control valve side and the supply section to be lower than a first stage of the hydraulic pressure (P3) of the variable capacitance pump under which the drained flow quantity of the variable capacitance pump begins to be varied.