Oil supplying apparatus for vehicle

An oil supplying apparatus for a vehicle, comprising:

• an engine driven mechanical oil pump;
• a hydraulic actuator activated while being in receipt of fluid under pressure supplied from the engine driven mechanical oil pump;
• an engine lubrication device causing the fluid supplied from the engine driven mechanical oil pump to lubricate engine parts;
• a priority flow valve giving a priority to the fluid pressure supply to the hydraulic actuator from the engine driven mechanical oil pump relative to the fluid supply to the engine lubrication device from the engine driven mechanical oil pump when the fluid pressure supplied to the hydraulic actuator drops below a predetermined value;
• and
• wherein the priority flow valve is positioned between the engine driven mechanical oil pump and the hydraulic actuator so that the fluid supplied from the engine driven mechanical oil pump flows through the priority flow valve before entering the hydraulic actuator, and the priority flow valve is configured to prevent residual fluid remaining between the hydraulic actuator and the priority flow valve from escaping after the engine driven mechanical oil pump is stopped.

An oil supplying apparatus for a vehicle possessing an engine, the oil supplying apparatus comprising:

• a mechanical oil pump powered by the engine and configured to generate pressurized oil, wherein a pressure of the pressurized oil generated by the mechanical oil pump varies according to engine speed;
• a hydraulic actuator;
• an engine lubrication device configured to lubricate the engine;
• a priority flow valve configured to receive the pressurized oil from the mechanical oil pump and selectively output the pressurized oil to the hydraulic actuator and the engine lubrication device based on the pressure of the pressurized oil generated by the mechanical oil pump;
• a first hydraulic conduit extending between the priority flow valve and the hydraulic actuator, and configured to convey the pressurized oil between the priority flow valve and the hydraulic actuator;
• a second hydraulic conduit extending between the priority flow valve and the engine lubrication device, and configured to convey the pressurized oil between the priority flow valve and the engine lubrication device;
• a third hydraulic conduit, separate from the first and second hydraulic conduits, extending between the mechanical oil pump and the priority flow valve, and configured to convey pressurized oil between the mechanical oil pump and the priority flow valve;
• wherein the priority flow valve permits flow of the pressurized oil along the first hydraulic conduit and the second hydraulic conduit when the mechanical oil pump generates pressurized oil having a first pressure;
• wherein the priority flow valve permits flow of the pressurized oil along the first hydraulic conduit and obstructs flow of the pressurized oil along the second hydraulic conduit when the mechanical oil pump generates pressurized oil having a second pressure, the second pressure being less than the first pressure;
• and
• wherein the priority flow valve obstructs the first hydraulic conduit after the engine ceases powering the mechanical oil pump so that at least a portion of residual oil remaining in the first hydraulic conduit after the mechanical oil pump stops operating is prevented from flowing back into the priority flow valve.