Feasibility and limitations of premixed diesel combustion in multi-cylinder engines.
dc.contributor.author | Lechner, Guntram Arnulf | |
dc.contributor.advisor | Assanis, Dionissios | |
dc.date.accessioned | 2016-08-30T15:21:44Z | |
dc.date.available | 2016-08-30T15:21:44Z | |
dc.date.issued | 2003 | |
dc.identifier.uri | http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqm&rft_dat=xri:pqdiss:3096135 | |
dc.identifier.uri | https://hdl.handle.net/2027.42/123632 | |
dc.description.abstract | This thesis identifies and assesses strategies for achieving Low Soot Combustion (LSC) in automotive diesel applications. The interaction of fundamental parameters such as fuel chemistry, mixture formation and temperature-control was investigated and the implications thereof on LSC were explored. For the purpose of this work, LSC is defined to have an emissions index for particulate matter (EI-PM) of equal or less than 0.4 g/kg of fuel and an emission index of oxides of nitrogen (EI-NOx) of equal or less than 1 g/kg of fuel. Several distinct strategies were investigated using a single-cylinder engine including retarded LSC, premixed LSC and fuel with different chemical properties to identify the most promising approach to achieve LSC for diesel engines. A premixed strategy with diesel fuel was identified as a promising approach to achieve LSC for passenger car applications. Subsequently, this concept was refined and implemented into a 1.7L, 4-cylinder, production type diesel engine. A combination of narrow spray cone angles along with injection of a substantial amount of fuel at very advanced injection timings and EGR rates of more than 50% created combustion patterns that no longer followed the traditional soot/NOx trade off, and NOx and PM emissions could be reduced simultaneously. Consequently, the developed combustion strategy established predominantly premixed diesel combustion and exhibited reductions in NOx emissions of 82% and in PM emissions of 39% with a 4.5% penalty in net thermal efficiency compared to the base engine configuration. | |
dc.format.extent | 168 p. | |
dc.language | English | |
dc.language.iso | EN | |
dc.subject | Advanced Injection | |
dc.subject | Cylinder | |
dc.subject | Diesel | |
dc.subject | Engines | |
dc.subject | Feasibility | |
dc.subject | Limitations | |
dc.subject | Multi | |
dc.subject | Premixed Combustion | |
dc.title | Feasibility and limitations of premixed diesel combustion in multi-cylinder engines. | |
dc.type | Thesis | |
dc.description.thesisdegreename | PhD | en_US |
dc.description.thesisdegreediscipline | Applied Sciences | |
dc.description.thesisdegreediscipline | Automotive engineering | |
dc.description.thesisdegreegrantor | University of Michigan, Horace H. Rackham School of Graduate Studies | |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/123632/2/3096135.pdf | |
dc.owningcollname | Dissertations and Theses (Ph.D. and Master's) |
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