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Combustion and emission characteristics of a gasoline-dimethyl ether dual-fuel engine

Title
Combustion and emission characteristics of a gasoline-dimethyl ether dual-fuel engine
Author
박성욱
Keywords
Gasoline-dimethyl ether dual fuel; nanoparticle; pollutant emissions
Issue Date
2012-07
Publisher
SAGE PUBLICATIONS LTD
Citation
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING, 2012, 226(12), P.1667~1677
Abstract
An experimental investigation was performed to investigate the effect of a split-injection strategy on the combustion and exhaust emission characteristics as well as on the particle number distribution for a single-cylinder compression ignition engine with gasoline-dimethyl ether dual fuelling. The gasoline-dimethyl ether dual-fuel injection system utilized port injection for gasoline and direct injection for dimethyl ether. In the present system, premixed fuel (i.e. gasoline) was injected into the premixing chamber at an injection pressure of 3 MPa using gasoline direct injection to mix the air-gasoline mixture sufficiently. However, dimethyl ether fuel was injected at an injection pressure of 50 MPa directly into a combustion chamber in order to control the combustion phase, resulting in a change in the direct-injection timing from -20 to +2 degrees crank angle. The experimental results show that the gasoline-dimethyl ether dual-fuel engine exhibited benefits in the indicated mean effective pressure for early-injection cases (i.e. near -10 degrees crank angle after top dead centre). However, the indicated mean effective pressure of the gasoline-dimethyl ether dual-fuel engine deteriorated for delayed-injection cases owing to incomplete combustion. In addition, a significant reduction in the nitrogen oxide emissions was observed using gasoline-dimethyl ether dual fuel compared with those obtained using conventional dimethyl ether combustion. In particular, soot emissions are almost at zero level for all the cases. On the other hand, hydrocarbon and carbon dioxide emissions increase with an increasing portion of premixed injection fuel (i.e. gasoline) in conventional injection timing, which is near top dead centre.
URI
http://journals.sagepub.com/doi/10.1177/0954407012450122http://hdl.handle.net/20.500.11754/66364
ISSN
0954-4070
DOI
10.1177/0954407012450122
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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