Patent ID: 7308882

Claim:
An oil feeding system of an engine equipped with a transmission configured to change a rotational speed of rotation of a crankshaft and to output the rotation, comprising: an oil pump configured to be driven in cooperation with the rotation of the crankshaft; an oil passage through which oil outflowing from the oil pump flows; a hydraulically-powered system including at least one of a hydraulically-powered variable valve timing system and a hydraulically-powered tensioner lifter, the variable valve timing system being configured to be driven by the pressure of the oil to change a rotational phase of a camshaft, the tensioner lifter being configured to be driven by the pressure of the oil to guide a cam chain installed around the camshaft and the crankshaft; wherein the oil passage includes a transmission oil passage through which the oil outflowing from the oil pump is guided to the transmission, an engine body oil passage through which the oil outflowing from the oil pump is guided to the hydraulically-powered system, and a distributing passage from which the oil outflowing from the oil pump is distributed to the transmission oil passage and the engine body oil passage which are configured to branch from the distributing passage; and an oil control portion configured to change a ratio between a pressure of the oil flowing through the transmission oil passage and a pressure of the oil flowing through the engine body oil passage, wherein the oil control portion is provided in the transmission oil passage, and is configured to restrict a flow rate of the oil flowing in the transmission oil passage to increase the pressure of the oil delivered to the hydraulically-powered system, when the pressure of the oil in a portion of the transmission oil passage in which the oil control portion is provided is a predetermined value or less.