| 摘要 |
PURPOSE:To enable to release a leaked hydraulic oil from an oil reservoir of a clearance eliminating unit directly to outside and assure the smooth pivoting of a rocker shaft in a device in which a valve head clearance is automatically eliminated by the utilization of a hydraulic loading and a valve moving mechanism is silently operated. CONSTITUTION:An eccentric shaft 8 is formed on a rocker shaft 2 on which a journal 7 is releasably supported by a bearing hole 10 of an engine block B in freely rotatable manner, a rocker arm 11 is releasably supported by the eccentric shaft 8 in freely swingable manner in the title device. A hydraulic clearance eliminating unit Z is adjacently provided with a notch 14 arranged on the outer surface of the jouranal 7, the eccentric shaft 8 is pivoted in the direction eliminating the valve head clearance at the valve closing time of intake and exhaust valves Vi, Ve, then the pivoting of the eccentric shaft 8 is obstructed during the valve opening period. In this case, an oil chamber 33 is formed to be faced to the end surface of the journal 7 in said bearing hole 10, the oil chamber 33 is made to be opened to the outside via an escape hole 34. Thereby, the leakage of the hydrauric oil from the oil reservoir in said unit Z is made directly releasable to the outside. |
