Combustion Characteristics of Direct Injection (DI) Diesel Engine Fueled with 2-butyl Alcohol/ Diesel Blends at Different Speed

Abstract

Alcohol is one of the alternative fuels that can give significant different on engine combustion characteristic as well as exhausts emission. In this study, the influence of 2-butyl alcohol/ Diesel blends on the combustion characteristic of a DI diesel engine was investigated by using three different fuel blends (Diesel, DBu5, and DBu10). Both 2-butyl alcohol and diesel fuel were blended together before tested on 3 liter common-rail direct injection diesel engine by their percentage (volume) of 2-butyl alcohol 5% (DBu5) and 2-butyl alcohol 10% (DBu10). The test results were analysed and compared with a base diesel engine operate at same speed and load. The tests in a compression ignition engine including analysis of combustion characteristics. The experiments were handled at five different speeds in the same operating condition. The results shows that the use of 2-butyl alcohol fuels blends, ignition delay is increased, maximum in-cylinder pressures are marginally reduced and in-cylinder temperatures are reduced during the combustion. The addition of 2-butyl alcohol can considerably improve CO2 emissions and slightly increase on NOx and CO.