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Performance and Emissions of an 11L LPG MPI Engine for City Buses
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
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An 11L heavy duty LPG MPI engine has been developed using the liquid phase LPG injection system, which is one of the next generation LPG fueling technologies, since the LPG MPI engine can achieve the higher power and efficiency, and lower exhaust emissions than the conventional mixer type system.
Two prototypes - a natural aspiration(NA) engine and a turbocharged inter-cooler(TCI) engine - were developed in this work and tested to measure the performance and emissions. For a NA type engine, in order to achieve the low emissions, the stoichiometric air/fuel ratio was adapted with a three-way catalytic converter. Whereas, for a TCI type, the lean burn technology was introduced to minimize the thermal loading due to an increase of the engine power.
The results in this work demonstrated that the LPG MPI engines have the higher engine performance and lower exhaust emissions than the base diesel engine. Especially, with the NA stoichiometric engine, EURO III regulation was successfully met up to 25% of its level.
- Nakchung Jung - LG-Caltex Gas Co. Ltd.
- Jihong Rhee - LG-Caltex Gas Co. Ltd.
- Kernyong Kang - Korea Institute of Machinery and Materials
- Changgi Kim - Korea Institute of Machinery and Materials
- Jinwook Lee - Korea Institute of Machinery and Materials
- Daeyup Lee - Korea Institute of Machinery and Materials
- Eunpyo Ko - SK Gas Ltd.
- Juwan Kang - SK Gas Ltd.
CitationKang, K., Kim, C., Lee, J., Lee, D. et al., "Performance and Emissions of an 11L LPG MPI Engine for City Buses," SAE Technical Paper 2002-01-0448, 2002, https://doi.org/10.4271/2002-01-0448.
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