| 摘要 |
PURPOSE: To reduce the generated quantity of NOx as flammability on the condition of lean burning is improved in a lean-burn engine. CONSTITUTION: An injector 40 for jetting fuel is severally provided in each cylinder, and set up to be an air mixture type injector, and an air supply passage 52 which supply air for atomizing the fuel and an air control valve 51 are provided in each injector 40, and at least, the air control valve 51 is opened in a lean operation zone for suppling the air to each injector 40. |
