A simulation analysis of a DI diesel engine fuel injection system fitted with a constant pressure valve

Rakopoulos, CD; Hountalas, DT

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Hountalas, DT	en
dc.date.accessioned	2014-03-01T01:11:38Z
dc.date.available	2014-03-01T01:11:38Z
dc.date.issued	1996	en
dc.identifier.issn	0196-8904	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11750
dc.subject	Constant pressure valve	en
dc.subject	Diesel engine	en
dc.subject	Fuel injection system	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Mechanics	en
dc.subject.classification	Physics, Nuclear	en
dc.title	A simulation analysis of a DI diesel engine fuel injection system fitted with a constant pressure valve	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0196-8904(95)00176-E	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0196-8904(95)00176-E	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	In the present work, a theoretical and computational investigation is conducted to examine the performance of a fuel injection system fitted with a constant pressure valve, used to power a high speed direct injection (DI) diesel engine. The delivery valve (conventional layout) in the fuel injection system of diesel engines is used to provide a residual pressure in the fuel pipeline for the next injection. However, this layout often results in secondary injections which have a serious effect on engine performance. This problem is more severe in the cases of maintaining high residual pressure values. The use of a secondary valve placed inside the delivery valve, called the constant pressure valve, eliminates this problem by relieving the fuel pipe from the high pressure fluctuations caused by the pressure waves reflected at the injector end and the delivery valve chamber. A relevant experimental investigation is conducted with such a fuel injection system on a high speed direct injection diesel engine, examining the effect of load and speed on the performance of the fuel injection system. The experimental results compare well with the theoretical results obtained from a comprehensive simulation model developed by the present authors. Also, results are presented using the simulation model for the same fuel injection system without being fitted with the constant pressure valve, revealing the occurrence of secondary injections at a high engine speed. The simulation model offers very useful information concerning the design of such a fuel injection system and may be used during the development procedure providing economy in time and a better understanding of the entire injection process.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Energy Conversion and Management	en
dc.identifier.doi	10.1016/0196-8904(95)00176-E	en
dc.identifier.isi	ISI:A1996TJ13900002	en
dc.identifier.volume	37	en
dc.identifier.issue	2	en
dc.identifier.spage	135	en
dc.identifier.epage	150	en