| 摘要 |
PURPOSE:To control the valve opening time by providing a stopper for a piston in a hydraulic oil drive type discharge valve unit. CONSTITUTION:A screw 4 is provided as a stopper to limit the storoke of a piston 2a when it is pushed by the oil pressure of an actuator 1. When oil is filled in a hydraulic oil pipe 15 and the other hydraulic oil passage and the piston 8 of the actuator is moved upward by a cam 7, the piston 2a is pushed until its rear end hits a stopper screw 4. The delay of the exhaust valve opening time can be set at any optional value by changing the stroke of a sub-cylinder 2a with the stopper screw 4, thereby the opening time of the exhaust valve can be controlled with a simple constitution. |
