| 摘要 |
PURPOSE:To prevent the blowout of ignited flames, to improve the combustion efficiency, and also to improve inflammability by advancing the closing timing of a subvalve which opens or closes a reservoir chamber so as to reduce the spray energy of spray gas during an extremely low load operation including an idle operation. CONSTITUTION:During an extremely low load operation including an idle opration, the communication between an oil pump 33 and an oil hydraulic cylinder 31 is cut off by the transfer action of a pressure control valve 32, and at the same time the cylinder 31 is opened to the atmosphere, thus the oil pressure in the cylinder 31 is reduced, a plunger 31a is absorbed by the energizing force of a spring 34 so as to move a cam shaft 13 to the left, thereby the second cam 26b is brought into contact with a rocker arm 27, a valve 24 is operated to open or close earlier than during a normal operation shown by a broken line, thus decreasing the gas pressure in the reservoir chamber 21 and reducing the spray energy. |
