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An experimental study was carried out to acquire the data about the effects of radical ignition on lean burn using CVC(constant volume combustor) and a real engine. A CVC is divided into the sub-chamber and the main chamber and numerous narrow passage holes are arranged among the main chamber and the sub-chamber. The products including radicals generated by spark ignition in the sub-chamber derives the simultaneous multi-point ignition in the main chamber. We examined the effects of the ratio between the sub-chamber volume and the sectional area of passage holes. In a CVC, the overall burning time including the ignition delay became very short and the maximum burning pressure was slightly increased by the radical ignition(RI) method in comparison with those by the conventional spark ignition(SI) method. It was proved that the optimum Ah/Vs ratio exists with the equivalence ratio. Also, conventional diesel engine was remodeled to a spark ignition engine, and that is finally converted to a radical engine with sub-chamber. It was proved that the residual gas in the sub-chamber brings severe cycle variation in a real RI engine. Therefore a new system using CNG and solenoid type of fuel injector was adopted to solve scavenging problem and fundamental experiments were performed for CVC prior to engine operation. As a result, the effects of residual gas were very great and the more detailed analysis is required on residual gas.

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Abstract

1. 서 론

2. 실험 장치 및 방법

3. 실험결과 및 고찰

4. 결 론

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UCI(KEPA) : I410-ECN-0101-2009-556-017825649