Comparative study of turbocharged diesel engine emissions during three different transient cycles

Giakoumis, EG; Alafouzos, AI

dc.contributor.author	Giakoumis, EG	en
dc.contributor.author	Alafouzos, AI	en
dc.date.accessioned	2014-03-01T02:00:18Z
dc.date.available	2014-03-01T02:00:18Z
dc.date.issued	2010	en
dc.identifier.issn	0363-907X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29079
dc.subject	heavy-duty diesel engine	en
dc.subject	transient operation	en
dc.subject	nitric oxide	en
dc.subject	soot	en
dc.subject	fuel consumption	en
dc.subject	Transient Cycle	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Nuclear Science & Technology	en
dc.title	Comparative study of turbocharged diesel engine emissions during three different transient cycles	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Starting from the 1980s (diesel-engined) vehicles have been tested for exhaust emissions, prior to type approval, using sophisticated standardized transient tests (Transient Cycles). These are usually characterized by long duration consisting of both speed and load changes under varying operating schedules. In the present work, a fast and, relatively, easy to apply approach was developed in order to be able to make a first approximation of the engine performance and emissions during a speed/torque vs time Transient Cycle. The procedure is based on a previous steady-state experimental investigation of the engine for the formulation of polynomial expressions of all interesting engine properties with respect to engine speed and torque. Correction coefficients are then applied, based on experiments conducted on the engine under study, to account for transient discrepancies. Using the developed algorithm, a comparative study was conducted for the European, American and the Worldwide heavy-duty Transient Cycles. It was revealed for the current engine that the European ETC, being the most aggressive and having the shortest idling period, is also the most demanding in terms of absolute emissions (g), particularly soot. At the same time, the importance of abrupt transients (primarily experienced during urban driving) on engine emissions was highlighted. A comparative analysis was also performed that detailed the individual technical and transient characteristics of each cycle. Copyright (C) 2009 John Wiley & Sons, Ltd.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	INTERNATIONAL JOURNAL OF ENERGY RESEARCH	en
dc.identifier.isi	ISI:000282295800006	en
dc.identifier.volume	34	en
dc.identifier.issue	11	en
dc.identifier.spage	1002	en
dc.identifier.epage	1015	en