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HCCI gasoline engine


Key steps in the process include air and fuel entering the cylinder during the intake stroke, the piston moving up to compress the air-fuel mixture, a spark to ignite the mixture as the piston reaches the top of its stroke driving the piston down in the combustion phase and, finally, the exhaust valve opening to permit exhaust and spent fuel to leave the cylinder. Impact of current lubricant technology on HCCI Assanis and his colleagues in the General Motors-University of Michigan Collaborative Laboratory on Engine Systems Research have characterized the effects of gasoline HCCI combustion on the formation of deposits and reported their results in a recent paper.2 In other ongoing efforts, they are exploring the effects of various grades of diesel fuels and biofuels on premixed compression ignition combustion using the single cylinder setup shown in Figure 3.

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