Abstract
The sub-chamber type gasoline engine was suggested to be a type of clean engine, but the presence of residual gas in the sub-chamber was a serious fault. In this experimental study, the CNG direct injection method was applied to scavenge residual gas from the sub-chamber. The CVC (constant volume chamber) is divided into the sub-chamber and main-chamber and used as the main experimental apparatus. Because each combustion chamber of the CVC has an injector, the injector can be used freely, at the same time or individually. Therefore, the scavenging efficiency can be improved by changing injection times for the sub-chamber. The experimental results demonstrated that when all the fuel was injected into the sub-chamber, the combustion duration was shortened by 30% compared to that of injection into the main-chamber. Although residual gas was observed in the CVC, when the frequency of injections into the sub-chamber increased, good combustion characteristics were obtained.
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References
Chol, G. H., Han, S. B. and Dibble, R. W. (2004). Experimental study on homogeneous charge compression ignition engine operation with exhaust gas recirculation. Int. J. Automotive Technology 5,3, 195–200.
Ha, J. Y., Chung, S. S., Park, J. S. and Lee, T. Y. (2004). A study on the combustion characteristics of lean mixture by radicals induced injection in a constant volume combustor (1). Trans. Korean Society Automotive Engineers 12,2, 45–53.
Lee, J. T., Lee, S. H. and Kim, Y. Y. (2004). An investigation on the proper hydrogen mixing rate in heavy-duty hydrogen-CNG engine. Trans. Korean Hydrogen New Energy Society 15,2, 89–97.
Park, J. S., Ha, J. Y. and Chung, S. S. (2003). Combustion characteristics in a constant volume chamber and an engine using active radicals induced injection. Auto J. 25,3, Korean Society Automotive Engineers, 30–33.
Park, J. S., Yeom, J. K., Lee, T. W., Ha, J. Y. and Chung, S. S. (2006). Study on the pre-mixture combustion in a sub-chamber type CVC with multiple passage holes. Int. J. Automotive Technology 7,1, 77–82.
Pischinger, M., Salber, W., Staay, F. V. D., Baumgarten, H. and Kemper, H. (2000). Low fuel consumption and low emissions — Electro-mechanic valvetrain in vehicle operation. Int. J. Automotive Technology 1,1, 17–25.
Sim, H. S. and Chung, S. H. (2002). Comparison of hydrocarbon reduction in a SI engine between continuous and synchronized secondary air injections. Int. J. Automotive Technology 3,1, 41–46.
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Chung, S.S., Yeom, J.K. & Park, J.S. Scavenging a sub-chamber type CNG fueled engine. Int.J Automot. Technol. 9, 123–128 (2008). https://doi.org/10.1007/s12239-008-0016-7
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DOI: https://doi.org/10.1007/s12239-008-0016-7