Abstract

In the curiosity forever improving fuel efficiency and emissions reduction, a new and highly promising idea has found new life. HCCI (Homogeneous Charge Compression Ignition) technology has been around for a long time, but has recently received renewed attention and enthusiasm. An HCCI engine is a mix of both conventional spark-ignition and diesel compression ignition technology. The blending of these two designs offers diesel-like high efficiency without the difficulty and expensive to deal with NOx and particulate matter emissions. For the above purpose the chicken fat oil methyl ester – gasoline blend and chicken fat oil methyl ester - diesel blends are used in HCCI engine concept. The air and fuel mixture in various proportions are prepared externally by using a fuel vaporizer mounted in the intake pipe. Fuel injection is done by port fuel injector and the quantity is controlled by the electronic control unit (ECU). It can be observed from the above experimental work that the oil extracted from chicken fat can be a suitable alternative fuel to run diesel engine. Chicken fat oil methyl ester with the blend of 10% gasoline gives higher thermal efficiency than other fuel combinations with lower NOX and HC emissions.

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