An Experimental Investigation of a Multi-Cylinder Engine with Gasoline-Like Fuel towards a High Engine Efficiency

Lianhao Yin, Gabriel Ingesson, Per Tunestal, Rolf Johansson, Bengt Johansson

Research output: Contribution to journalConference articlepeer-review

18 Scopus citations

Abstract

Partially Premixed Combustion (PPC) is a promising combustion concept with high thermodynamic efficiency and low emission level, and also with minimal modification of standard engine hardware. To use PPC in a production oriented engine, the optimal intake charge conditions for PPC should be included in the analysis. The experiments in this paper investigated and confirmed that the optimal intake conditions of net indicated efficiency for PPC are EGR between 50% and 55% as possible and the lambda close to 1.4. Heat-transfer energy and exhaust gas waste-energy contribute to the majority of the energy loss in the engine. The low EGR region has high heat-transfer and low exhaust gas enthalpy-waste, while the high EGR region has low heat-transfer and high exhaust gas waste-enthalpy. The optimal EGR condition is around 50% where the smallest energy loss is found as a trade-off between heat transfer and exhaust-gas enthalpy-waste. Lambda close to 1.4 results from the trade-off of high gas-exchange efficiency with low lambda and high thermodynamic efficiency with high lambda. The optimal inlet charge condition was also applied to a multi-cylinder engine from low load to high load. The results indicate that the highest net indicated efficiency of the experimental engine was 49.7% at 13.5 bar IMEPn (Net Indicated Mean Effective Pressure), the highest brake efficiency was 44.2% observed at 17.2 bar IMEPn.

Original languageEnglish (US)
JournalSAE Technical Papers
Volume2016-April
Issue numberApril
DOIs
StatePublished - Apr 5 2016
EventSAE 2016 World Congress and Exhibition - Detroit, United States
Duration: Apr 12 2016Apr 14 2016

ASJC Scopus subject areas

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

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