Investigation of knock prevention in high efficiency, zero emissions H2-O2-Ar internal combustion

Vi H. Rapp, Nick Killingsworth, Salvador Aceves, J. Y. Chen, Robert Dibble

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

We have been investigating the concept of running a spark ignited internal combustion engine on hydrogen (H2), oxygen (O2), and argon (Ar). Basic engine theory predicts such an engine will see a considerable improvement in engine efficiency (theoretically ≈75%, and in practice ≈50% including heat transfer and friction losses) over standard engines. These gains in thermal efficiency are due to argon's high specific heat ratio (γ= 1.67 compared toγ < 1.4 for air). Experimentally achieving such high efficiencies, however, has been difficult due to engine knock, which occurs at compression ratios as low as 4.5. The engine's spark timing must typically be retarded due to knock. This limitation reduces the maximum efficiency of the engine. In this paper, dual spark ignition is studied to delay the onset of knock in this novel hydrogen engine concept. In an effort to obtain the highest efficiency of this concept, experiments were conducted using a single cylinder CFR engine. Argon concentrations of 84%, 86%, and 88%, by volume, were studied using single and duel spark ignition at stoichiometric fuel-oxygen mixtures with compression ratios between 4.5 and 7.

Original languageEnglish (US)
Title of host publicationFall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009 Fall Meeting
PublisherWestern States Section/Combustion Institute
Pages49-54
Number of pages6
ISBN (Electronic)9781615676507
StatePublished - Jan 1 2009
EventFall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009 - Irvine, United States
Duration: Oct 26 2009Oct 27 2009

Publication series

NameFall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009 Fall Meeting
Volume1

Other

OtherFall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009
CountryUnited States
CityIrvine
Period10/26/0910/27/09

Keywords

  • Dual spark
  • Hydrogen
  • Internal combustion engine
  • Noble gas

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

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