Patent ID: 6820580
Filing Date: 2004-11-23
Classification: F01L,F01M

Abstract:
A valve driving device for an engine, comprising:a variable valve timing mechanism disposed at an end portion of a camshaft driving an intake valve and/or an exhaust valve synchronously with a crankshaft of the engine, the variable valve timing mechanism being a hydraulic-pressure operating type of variable valve timing mechanism that is capable of changing a rotational phase of the camshaft with respect to the crankshaft; a hydraulic pressure control valve operative to control a supply of an operating hydraulic pressure to said variable valve timing mechanism; a rotational angle sensor operative to detect a rotational angle of the camshaft, the rotational angle sensor being a solenoid-pickup type of sensor and including a detecting end surface that is disposed close to a rotational area of a sensor rotor attached to the camshaft, wherein said hydraulic pressure control valve includes a drain hole, return oil from said variable valve timing mechanism is discharged through the drain hole of said hydraulic pressure control valve, and said rotational angle sensor and said hydraulic pressure control valve are disposed such that the detecting end surface of said rotational angle sensor is located in a spray area of the return oil discharged through the drain hole.