| 摘要 |
PURPOSE:To improve the state of combustion at the latter period of combustion, and realize the improvement of an engine efficiency and the reduction of a harmful discharge matter, by injecting in the direction of a main fuel being stirred a sub fuel which consumes the amount of air less than the main fuel and also has a faster combustion speed, after the main fuel such as heavy oil or the like having been injected. CONSTITUTION:A main fuel injecting valve 4 and also a sub fuel injecting valve 5 are respectively arranged at the center portion of a cylinder chamber 6 and at its side part, at a cylinder head 1. And a main fuel A is injected from the main fuel injecting valve 4, and then, after the lapse of a fixed time, a sub fuel B is injected from the sub fuel injecting valve 5. As a result, the main fuel A, air C and the sub fuel B are made to turn and stir, and the state of combustion at the latter period of combustion is improved. Also, fuel which consumes the amount of air less than the main fuel A and also has a faster combustion speed, is used as the sub fuel B, and such a defect as prolongs the whole period of combustion due to the injection of the sub fuel B, is dissolved. |
