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 hydraulic pressure circuit including: an introduction section (15a) into which oil is introduced; a main passage section installed at a downstream side of the introduction section to communicate with a supply section (20) supplying oil to each lubricating section of an internal combustion engine; and a control valve (22) having a valve body (29) which is moved to control an oil flow quantity to the supply section, the control valve apparatus further comprises a flow passage cross sectional area enlargement section (72) configured to enlarge a cross sectional area of a flow passage through which oil is caused to flow into the supply section from the introduction section when the valve body becomes immovable.