Cold-start emissions of an SI engine using ethanol-gasoline blended fuel

Rong Horng Chen, Li Bin Chiang, Chung Nan Chen, Ta Hui Lin

Research output: Contribution to journalArticlepeer-review

126 Citations (Scopus)


The effects of ethanol-gasoline blended fuel on cold-start emissions of an SI engine were studied. During cold-start, the ECU controls fuel injection rate based on cooling water temperature and intake air temperature, which were carefully controlled during the experiment. More ethanol content in the blended fuel makes the air-fuel mixture leaner and also affects the RVP value. The engine could be started stably with E5, E10, E20, and E30. The HC and CO emissions decreased significantly with more ethanol than 20% added. However, for E40 the engine idling became unstable because the air-fuel mixture was too lean. Therefore, the ethanol content in gasoline for best cold-start emissions was determined to be at least 20 per cent but no greater than 30 per cent.

Original languageEnglish
Pages (from-to)1463-1467
Number of pages5
JournalApplied Thermal Engineering
Issue number8-9
Publication statusPublished - 2011 Jun

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering


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