International Conference


TitleHyeonsook Yoon and Choongsik Bae, "The Comparative Study on DME and Diesel PCCI Engine Combustion with Two-Stage Fuel Injection Strategy," The 8th international colloquium fuels, Stuttgart, Germany, 19~20th Jan. 2011

Hyeonsook Yoon and Choongsik Bae, “The Comparative Study on DME and Diesel PCCI Engine Combustion with Two-Stage Fuel Injection Strategy,” The 8th international colloquium fuels, Stuttgart, Germany, 19~20th Jan. 2011

Abstract

Premixed charge compression ignition combustion with a two-stage fuel injection strategy using dimethyl-ether, a gaseous fuel and diesel, a liquid fuel, was investigated in a single cylinder direct-injection compression-ignition engine. The combustion performance and exhaust emissions were tested by varying the second injection timing for dimethylether and diesel respectively. The experiments were canied out under low load and low speed conditions. The first injection was injected at the early stage of the compression stroke to gain enough time for premixed mixture formation. The injected fuel quantity of the first injection was varied conesp~mding to the fixed load. A small quantity of second injection was applied to control the premixed charge combustion with various timings near the top dead center. With the second injection near the top dead center, the combustion efficiencies improved for both dimethyl-ether and diesel. By the late second injection, the combustion phase was retarded and lengthened, and hydrocarbon and carbon monoxide emissions were reduced.

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