The influence of EGR on auto-ignition quality of gasoline-like fuels in HCCI engines
2004 (English)In: SP-1896, 2004Conference paper (Refereed)
In previous studies it has been shown that the auto-ignition quality of a fuel at a given engine condition can be described by an octane index defined as, OI=(1-K) RON + K MON, where RON and MON characterize the fuel and the K-value depends only on the engine design and operating conditions. It has been shown that the K-value is highly dependent on the pressure and temperature history. Another important parameter is OI 0 , the OI of the fuel which gives heat release centred at top dead center; OI 0 can be considered to be the requirement of the engine. In previous work, empirical relations for both K and OI 0 in terms of in-cylinder pressure and temperature and engine speed and mixture strength were found but the influence of EGR was not considered. Therefore experiments have been done in a single cylinder engine, working in HCCI mode, at different operating conditions including various internal and external EGR rates, using fuels of different chemistries and different known RON and MON values.
Place, publisher, year, edition, pages
Other Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-5659DOI: 10.4271/2004-01-2952OAI: oai:DiVA.org:kth-5659DiVA: diva2:10098
Presented at SAE Powertrain & Fluid Systems Conference & Exhibition, heldOctober 2004, in Tampa, FL, USA. SAE 2004-01-2952, SAE Transactions
QC 201009172006-05-082006-05-082010-12-20Bibliographically approved