A turbo charged dual fuel HCCI engine

Jan Ola Olsson*, Per Tunestål, Göran Haraldsson, Bengt Johansson

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

79 Scopus citations

Abstract

A 6-cylinder truck engine is modified for turbo charged dual fuel Homogeneous Charge Compression Ignition (HCCI) engine operation. Two different fuels, ethanol and n-heptane, are used to control the ignition timing. The objective of this study is to demonstrate high load operation of a full size HCCI engine and to discuss some of the typical constraints associated with HCCI operation. This study proves the possibility to achieve high loads, up to 16 bar Brake Mean Effective Pressure (BMEP), and ultra low NOx emissions, using turbo charging and dual fuel. Although the system shows great potential, it is obvious that the lack of inlet air pre heating is a drawback at low loads, where combustion efficiency suffers. At high loads, the low exhaust temperature provides little energy for turbo charging, thus causing pump losses higher than for a comparable diesel engine. Design of turbo charger therefore, is a key issue in order to achieve high loads in combination with high efficiency. In spite of these limitations, brake thermal efficiencies and power rating close to those of the original diesel engine are achieved with significant reduction in NOx emissions. The maximum efficiency is 41.2%, which is slightly lower than for the original diesel engine.

Original languageEnglish (US)
DOIs
StatePublished - Dec 1 2001
EventInternational Spring Fuels and Lubricants Meeting and Exhibition - Orlando, FL, United States
Duration: May 7 2001May 9 2001

Other

OtherInternational Spring Fuels and Lubricants Meeting and Exhibition
CountryUnited States
CityOrlando, FL
Period05/7/0105/9/01

ASJC Scopus subject areas

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

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