Experimental studies on the exhaust emissions of a n-butanol/diesel dual-fuel HCCI engine under different intake temperature

Abstract To improve the exhaust emissions of n-butanol/diesel blends fueled HCCI engines, the influence of intake temperature (T in ) on the HC, CO, and NO x emissions was studied by bench tests on λ of 2.5, engine speed of 1000 r/min under the conditions with the blending ratio of B50 and B90. Experimental results show that the HC and CO decline as T in rises. At the same T in , the CO and HC of B90 are lower than B50. When the intake temperature is lower than 150°C, the NO x emissions are almost zero.