Performance and Emissions of DI Compression Ignition Engines Fueled with Dimethyl Ether. 1st Report. Performance and Emissions in Retrofitted Engines.
1998; Japan Society Mechanical Engineers; Volume: 64; Issue: 627 Linguagem: Inglês
10.1299/kikaib.64.3909
ISSN0387-5016
AutoresZhili CHEN, Mitsuru KONNO, Shuichi KAJITANI,
Tópico(s)Vehicle emissions and performance
ResumoEngine performance and exhaust gas characteristics of a direct injection CI engine were investigated with neat dimethyl-ether (DME), an alternative fuel being considered for attaining low emissions. The study was conducted by comparing with conventional gas oil. Results from the present work include : (1) It was necessary to add a small amount of lubricating additives to DME for achieving satisfactory engine operation, to minimize some excessive wear in the injection nozzle. (2) Engine performance for both fuels were comparable. (3) Although negligible amounts of soot ane very low THC emissions were measured, NOx emission was about the same as in gas-oil operation. (4) The reduction of NOx emission by retarding the injection timing was highly significant with DME. (5) The NOx emission from the retrofited engine could be further reduced by dissolving CO2 in DME.
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