The Influence of Crevices on Hydrocarbon Emissions from a Diesel-Methane Dual Fuel Engine
2013 (English)In: SAE International Journal of Engines, ISSN 1946-3936, Vol. 6, no 2, 751-765 p.Article in journal (Refereed) Published
Emissions of unburned methane are the Achilles heel of premixed gas engines whether they are spark ignited or diesel pilot ignited. If the engine is operated lean, lower temperatures prevail in the combustion chamber and several of the mechanisms behind the hydrocarbon emissions are aggravated. This paper presents an experimental investigation of the contribution from combustion chamber crevices and quenching to the total hydrocarbon emissions from a diesel-methane dual fuel engine at different operating conditions and air excess ratios. It is shown that the sensitivity to a change in topland crevice volume is greater at lean conditions than at stoichiometry. More than 70% of hydrocarbon emissions at air excess ratios relevant to operation of lean burn engines can be attributed to crevices.
Place, publisher, year, edition, pages
2013. Vol. 6, no 2, 751-765 p.
Crevice volumes, Different operating conditions, Experimental investigations, Hydrocarbon emission, Lean condition, Lean-burn engines, Lower temperatures, Total hydrocarbons
Vehicle Engineering Energy Engineering
IdentifiersURN: urn:nbn:se:kth:diva-134248DOI: 10.4271/2013-01-0848ScopusID: 2-s2.0-84878793872OAI: oai:DiVA.org:kth-134248DiVA: diva2:665931
FunderSwedish Energy Agency
QC 201403042013-11-212013-11-202014-09-15Bibliographically approved