| 摘要 |
The present invention relates to a hydraulic driving valve device for the four-stroke engine, wherein eccentric wheels or cams are coaxially provided with larger timing gear, pistons of main cylinders of the hydraulic driving device are radially provided in the periphery of eccentric wheels or cams. A main cylinder has an unloading port. An auxiliary cylinder is provided with an overflowing port, and a compensating port is provided therein also. A timing adjusting disc is co-centrically provided with the eccentric wheels or cams. The disc can rotate by an angle relative to the eccentric wheels or cams. The main cylinder is provided in the timing adjusting disc. The valve device of the present invention is reliable, perfect, simple in construction, small in volume and weight, therefore it can be assembled in desire, and can improve the timing adjustability of the valve device. |
