Abstract
For improving DI diesel engine performance, atomization of the fuel spray plays an important role. Increasing the flow velocity at the injection nozzle spray holes is regarded as an effective way for better fuel atomization without increasing the fuel injection pressure. Through experiments, enlarging the chamfer at the spray hole inlet has proved to be the most effective and suitable method for establishing high flow velocity injection nozzle.
The high flow velocity injection nozzle was compared with conventional one and was confirmed in better engine performance by its fine spray atomization.