Abstract
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.
