The Effect Of Advancing Injection Timing On Combustion Characteristics Using Stationary Diesel Engine With 30% Water In Diesel Emulsion Fuel

This study uses an emulsion fuel with a mixture of 30% water and 70% diesel on a Diamond DI 800 stationary diesel engine with an engine rotation of 1500 rpm. This research varied injection timing from 13 degrees CA ATDC to 19 degrees CA ATDC with intervals 2 degrees CA. At each injection timing variation, the engine load used is 1000W, 2500W, and 4000W. The results showed that advancing injection timing can shorten the ignition delay and the duration of combustion at all loads. The results of the variation in injection timing at cylinder pressure and the heat release rate rise along with advancing injection timing and optimally at 17 degrees CA ATDC and then decrease again. Increased in-cylinder pressure and heat release rate at high loads when compared to standard conditions of 4% and 16.7% (respectively). Hydrocarbons and Carbon monoxide emissions decrease with increasing engine load. Smoke emissions increase with increasing engine load. The optimal value of emissions is at an injection timing of 17 degrees CA ATDC.