Study on DI Diesel Engine with an Impinging Nozzle Head - Performance and Combustion Characteristics

A new impinging nozzle head attached on a normal injection nozzle was designed for improving the performance and combustion of DI diesel engine.

Since the fuel is directly injected to the nozzle head at a very short distance from a spray tip of nozzle in a DI diesel engine, the fuel particles will be improved in spray diffusion and distribution.

In the case of a prototype injection nozzle with four orifices, the spray angle from each orifice is narrow and similar to the shape of conifer's leaves. By using of the new designed impinging nozzle head, however, an improved spray angle and distribution of fuel and a better starting performance at very low temperature have been observed.