Effects of gas composition on the performance and hydrocarbon emissions for CNG engines

Byoung Hyouk Min, Ki Hon Bang, Ho Young Kim, Jin Taek Chung, Simsoo Park

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)


Natural gas is considered to be an alternative fuel for passenger cars, truck transportation and stationary engines that can provide both good environmental effect and energy security. However, as the composition of fuel natural gas varies with the location, climate and other factors, such changes in fuel properties affect emission characteristics and performance of CNG (Compressed Natural Gas) engines. The purpose of the present study is to investigate effects of difference in gas composition on engine performance and hydrocarbon emission characteristics. The results show that THC decreases with an increasing WI (Wobber Index) and MCP (Maximum Combustion Potential) of natural gas. The power is shown to be proportional to the total heat value of the actual amount of gas entering the cylinder. There is 20% power variation depending on the composition of gas when the A/F ratio and spark timing are adjusted and fixed for a specific gas.

Original languageEnglish
Title of host publicationSAE Technical Papers
Publication statusPublished - 1998 Dec 1
EventFuture Transportation Technology Conference and Exposition - Costa Mesa, CA, United States
Duration: 1998 Aug 111998 Aug 13


OtherFuture Transportation Technology Conference and Exposition
Country/TerritoryUnited States
CityCosta Mesa, CA

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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