dc.contributor.author	Slaughter, Raymond L. Jr.	en
dc.contributor.committeechair	Kornhauser, Alan A.	en
dc.contributor.committeemember	Nelson, Douglas J.	en
dc.contributor.committeemember	Vandsburger, Uri	en
dc.contributor.department	Mechanical Engineering	en
dc.date.accessioned	2014-03-14T20:52:28Z	en
dc.date.adate	1998-09-28	en
dc.date.available	2014-03-14T20:52:28Z	en
dc.date.issued	1998-09-10	en
dc.date.rdate	1998-09-28	en
dc.date.sdate	1998-09-10	en
dc.description.abstract	A study on the effects of increased ignition energy on cold start hydrocarbon emissions was conducted. The tests were conducted on a single cylinder ASTM-CFR engine. The engine was outfitted with EFI, exhaust analyzers, and temperature probes. The engine was also modified to produce cold start conditions rapidly after each run. For the experiment the engine was started from 18° C using three increasing ignition energy levels. The first level of ignition energy was the ignition energy produced by the stock CFR engine's ignition system. The second and third increased ignition energy levels were obtained by adding 0.387 joules and 1.187 joules to the stock output through a supplementary ignition system. Startup emissions and the number of cycles until the first successful fire were measured. The results of the tests show a 14% decrease in the average peak hydrocarbon (HC) concentration levels at the highest ignition energy. Overall reduction in HC was less. The variance in the peak HC levels was reduced at the highest ignition energy setting. CO production was increased in response to the increase in HC consumption. The spread in measured number of cycles until first fire was decreased at the highest ignition energy level. Although positive results were obtained, the test apparatus had some problem areas that may have reduced the effectiveness of the high energy ignition system. Based on what was learned recommendations on apparatus refinements and further tests were included.	en
dc.description.degree	Master of Science	en
dc.identifier.other	etd-82798-232857	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-82798-232857/	en
dc.identifier.uri	http://hdl.handle.net/10919/37005	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	CHAPTER1.PDF	en
dc.relation.haspart	CHAPTER2.PDF	en
dc.relation.haspart	CHAPTER3.PDF	en
dc.relation.haspart	CHAPTER4.PDF	en
dc.relation.haspart	CHAPTER5.PDF	en
dc.relation.haspart	REFER.PDF	en
dc.relation.haspart	APPEND.PDF	en
dc.relation.haspart	VITA.PDF	en
dc.relation.haspart	SLAUGHTERCONTENT.PDF	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	spark energy	en
dc.subject	start-up	en
dc.title	The Effects of Increased Ignition Energy on Cold Start Hydrocarbon Emissions	en
dc.type	Thesis	en
thesis.degree.discipline	Mechanical Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

The Effects of Increased Ignition Energy on Cold Start Hydrocarbon Emissions

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