A Study on the Performance of an LPG (Liquefied Petroleum Gas) Engine Converted from a Compression Ignition Engine

  • Choi, Gyeung-Ho (Department of Mechanical & Automotive Engineering, Keimyung University) ;
  • Kim, Tae-Kwon (Department of Mechanical & Automotive Engineering, Keimyung University) ;
  • Cho, Ung-Lae (Department of Automotive Engineering, Keimyung University) ;
  • Chung, Yon-Jong (Department of Automotive Engineering, Daegu Mirae College) ;
  • Caton, Jerald (Department of Mechanical Engineering, Texas A & M University) ;
  • Han, Sung-Bin (Department of Mechanical Engineering, Induk Institute of Technology)
  • Published : 2007.02.28


The purpose of this study was to investigate the reduction of exhaust gas temperature in a LPG engine that had been converted from a diesel engine. A conventional diesel engine was modified to a LPG (Liquefied Petroleum Gas) engine by replacing the diesel fuel injection pump with a LPG fuel system. The research was performed by measuring the exhaust gas temperature upon varying spark ignition timing, airfuel ratio, compression ratio, and different compositions of butane and propane. Engine power and exhaust temperature were not influenced by various butane/propane fuel compositions. Finally, among the parameters studied in this investigation, spark ignition timing is one of the most important in reducing exhaust gas temperature.


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