Phasing cylinder pressure to crank angle in a direct injection diesel engine, by simulation of compression curve and elaboration of measured pressure data

Kouremenos, DA; Rakopoulos, CD; Kotsos, CG

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Kotsos, CG	en
dc.date.accessioned	2014-03-01T01:08:29Z
dc.date.available	2014-03-01T01:08:29Z
dc.date.issued	1991	en
dc.identifier.issn	0015-7899	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10520
dc.subject	Data Acquisition	en
dc.subject	Diesel Engine	en
dc.subject	Heat Transfer	en
dc.subject	Internal Combustion Engine	en
dc.subject	Thermodynamic Model	en
dc.subject	Thermodynamics	en
dc.subject	Direct Injection	en
dc.subject.classification	Engineering, Multidisciplinary	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Combustion	en
dc.subject.other	Fuel injection	en
dc.subject.other	Internal combustion engines	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Direct fuel injection	en
dc.subject.other	Pressure diagrams	en
dc.subject.other	Top dead center	en
dc.subject.other	Diesel engines	en
dc.title	Phasing cylinder pressure to crank angle in a direct injection diesel engine, by simulation of compression curve and elaboration of measured pressure data	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF02561172	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF02561172	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	When measurements of indicator diagrams are made in an internal combustion engine, the serious problem arises of accurate phasing of pressure data to crank position. This work presents a novel thermodynamic method for such a phasing. A measuring assembly consisting of a piezoelectric transducer, a charge amplifier and a fast data acquisition board installed on a compatible PC computer, is used to obtain the indicator diagrams (i.e. pairs of pressure-time), dispensing thus with the use of a signal from the flywheel TDC marker. An advanced simulation thermodynamic model for the corresponding compression curve (i.e. before fuel injection) is proposed, which includes a detailed zero dimensional energy cascade turbulence submodel for predicting the heat transfer rate between cylinder gas and walls, a blowby rate submodel containing flow calculations in the piston ring pack assembly passages under rings motion conditions, and properties-relations pertaining to real gas (air) behaviour. The measured pressure data are corrected for drift and their exact period (from cycle to cycle) is determined. The theoretical compression curve is shifted (in time) to ""coincide"" to the compression part (before fuel injection) of the first measured cycle, so that its TDC is determined. The coincidence of the two compression curves is continuously (iteratively) improved by using a double iteration procedure, i.e. by firstly shifting the curves in time and secondly by varying the model's parameters and calibration constants. After this step, the phasing of pressure data to crank angle of the following cycles can be easily determined, since the corresponding time periods are already accurately calculated. The method is applied with success, under various speed and load conditions, for a fully instrumented single cylinder, LISTER LV1, direct injection, naturally aspirated, Diesel engine installation at the authors' laboratory. © 1991 VDI Verlag GmbH.	en
heal.publisher	Springer-Verlag	en
heal.journalName	Forschung im Ingenieurwesen	en
dc.identifier.doi	10.1007/BF02561172	en
dc.identifier.isi	ISI:A1991FN44300004	en
dc.identifier.volume	57	en
dc.identifier.issue	3	en
dc.identifier.spage	87	en
dc.identifier.epage	95	en