Multi-factor experimental study on decreasing diesel engine emission

The experimental factors are supercharger, injector, fuel injection pump and fuel supply advanced angle. The aim of experimentation is to reduce NOx and PM emissions; the way of experimentation is simplex method. It is shown that the simplex method can obtain the best experimentation result by multi-factor diesel engine experimentation method. The results of multi-factor experimentation method show that the big intake air pressure and excessive air ratio of supercharger, suitability of injector properly and the fuel injection pump with a reasonable advanced fuel supply angle properly can reduce the NOx by 19.8% and PM by 26.9%.