HC and CO emissions reduction by early injection strategy in a bioethanol blended diesel-fueled engine with a narrow angle injection system

► Combustion and emissions features were investigated in diesel engine with narrow-angle injector. ► The premixed combustion duration in narrow angle injector increased with bioethanol. ► The investigations of variation in the peak combustion pressure in the narrow angle injector is low. ► At early injection, narrow angle injector reduced CO/HC emissions in bioethanol fueled engine.