A Study on Combustion and Performance in a Diesel Engine Employing Two Stage Injection

Abstract

Including early injection timings, the effects of pilot injection on combustion and exhaust emissions were investigated in a DI diesel engine. With adequate pilot injection quantity and short pilot-main interval, NOx and noise are reduced suppressing the increase in Smoke. But early-timing pilot and high-pressure injection cause the increase in THC. At a light load, pilot injection is useful for stabilizing combustion.