抄録
Recently the heavy duty diesel engines have adopted the direct fuel injection combined with high injection pressure, the high boost turbo charger and the EGR, which is well known as a means to reduce the emissions effectively. The experiment has been done under the conditions of intake air quantity up to 4 times of naturally aspirated (NA) engine, 250MPa injection pressure and 70% EGR ratio. In these conditions the exhaust emissions such as NO_X and smoke are effectively decreased.
