Combustion and emission characteristics of a CI engine operating in diesel-1-butanol/CNG dual fuel mode with low and high CNG substitution rates in light load operation

Xiangyu Meng, Yuanxu Li, Karthik Nithyanandan, Wuqiang Long, Chia-Fon Lee

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

Abstract

Dual-fuel combustion mode with direct injection of diesel as the pilot fuel and port injection of compressed natural gas (CNG) in compression ignition (CI) engines has been widely investigated to comply with the latest emission regulations. The diesel-CNG dual-fuel combustion mode shows some potential to decrease NOx and soot emissions simultaneously, while it reveals a lower thermal efficiency compared to the pure diesel combustion mode under low load condition. The purpose of the current study is to investigate the possibility of using diesel blended with 1-butanol as the pilot fuel to enhance the engine performance and reduce emissions. Three pilot fuels-B0 (pure diesel), B10 (90% diesel and 10% 1-butanol by volume) and B20 (80% diesel and 20% 1-butanol) with the CNG substitution rates of 50% and 80% were compared at an engine speed of 1200 rpm. The experiments were conducted by sweeping the pilot fuel injection timing from -3 to -18 ° CA ATDC with an equivalent total energy (∼5 bar IMEP). The results illustrated that, for the 50% CNG substitution rate, the dual-fuel operation mode revealed a higher indicated thermal efficiency (ITE) under low load conditions, and B10 can significantly improve the ITE due to the shorter combustion duration. The emission results of B10 showed that it obtained lower THC and CO emissions, but a slightly higher NOx emission. For the 80% CNG substitution rate, the results presented lower ITE, higher THC and lower NOx emissions, comparatively.

Original languageEnglish (US)
Title of host publicationASME 2016 Internal Combustion Engine Fall Technical Conference, ICEF 2016
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791850503
DOIs
StatePublished - Jan 1 2016
EventASME 2016 Internal Combustion Engine Fall Technical Conference, ICEF 2016 - Greenville, United States
Duration: Oct 9 2016Oct 12 2016

Publication series

NameASME 2016 Internal Combustion Engine Fall Technical Conference, ICEF 2016

Other

OtherASME 2016 Internal Combustion Engine Fall Technical Conference, ICEF 2016
Country/TerritoryUnited States
CityGreenville
Period10/9/1610/12/16

ASJC Scopus subject areas

  • Automotive Engineering
  • Mechanical Engineering
  • Fuel Technology

Fingerprint

Dive into the research topics of 'Combustion and emission characteristics of a CI engine operating in diesel-1-butanol/CNG dual fuel mode with low and high CNG substitution rates in light load operation'. Together they form a unique fingerprint.

Cite this