This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Fundamentals of Pressure Trace Analysis for Gasoline Engines with Homogeneous Charge Compression Ignition
Technical Paper
2010-01-2182
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Regarding further development of gasoline engines several new technologies are investigated in order to diminish pollutant emissions and particularly fuel consumption. The Homogeneous Charge Compression Ignition (HCCI) seems to be a promising way to reach these targets. Therefore, in the past years there had been a lot of experimental efforts in this field of combustion system engineering. Negative valve overlap with pilot injection before pumping top dead center (PTDC) and an “intermediate” compression and combustion during PTDC, followed by the main injection after PTDC, is one way to realize and to proper control a HCCI operation.
For conventional CI and SI combustion the pressure trace analysis (PTA) is a powerful and widely used tool to analyse, understand and optimize the combustion process. With the first law of thermodynamics and some model assumptions regarding heat transfer and gas properties the burn rate is calculated by a pressure trace analysis from a given indicated cylinder pressure. For a HCCI engine with negative valve overlap, pilot injection and PTDC combustion a pressure trace analysis would be a very interesting tool to analyse the combustions during PTDC and FTDC, and to investigate the reaction of these two combustions on injection timings and other engine parameters. But, pressure trace analysis of such an engine is quite challenging.
A one-cylinder research engine was investigated with such a pressure trace analysis. The main focus was on the combustion during the PTDC. This intermediate combustion was clearly and reasonably indicated by the burn rate. The influence of varying pilot injection timings on the burn rate of the PTDC “intermediate” combustion will be presented.
The specifics of pressure trace analysis on HCCI engines will be discussed in detail. The authors recommend using different approaches for heat transfer during the high-pressure part of the cycle, the gas-exchange and during the negative valve overlap. To analyse the PTDC combustion the pressure trace analysis has to be combined with a gas exchange analysis. The fundamentals of gas exchange analysis will be described. It has to be stated that using small valve lifts the measured flow coefficients of the inlet and exhaust ports have to be often adjusted.
At last, the possibility to analyse the PTDC combustion is a mandatory step towards a burn rate simulation model for gasoline HCCI engines.
Recommended Content
Authors
Topic
Citation
Wenig, M., Grill, M., and Bargende, M., "Fundamentals of Pressure Trace Analysis for Gasoline Engines with Homogeneous Charge Compression Ignition," SAE Technical Paper 2010-01-2182, 2010, https://doi.org/10.4271/2010-01-2182.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 |
Also In
References
- VDA Handeln für den Klimaschutz 2 2009
- Golloch, Rainer Downsizing bei Verbrennungsmotoren Ein wirkungsvolles Konzept zur Kraftstoffverbrauchssenkung Berlin Springer 2005
- Heil, B. et al. Verbrauch und Emissionen - Reduzierungskonzepte beim Ottomotor MTZ 11 12 2001
- Merker, G. Schwarz, C. Stiesch, G. Otto, F. Verbrennungsmotoren - Simulation der Verbrennung und Schadstoffbildung 3 Teubner Verlag 2006
- Babic, G. FVV-Vorhaben Nr. 883, Untersuchung verschiedener Betriebsstrategien zur Benzinselbstzündung in Ottomotoren mit Direkteinspritzung und vollvariablem Ventiltrieb 2010
- Karl, G. Freisinger, N. Stelter, M. Hunger, M. Baur, B. (Daimler AG) Schüle, H. Beyer, T. Stutika, M. (Continental Automotive GmbH) Raumzündung - ein alternativer, motorischer Ansatz zur Verbrauchsreduzierung 12 Tagung “der Arbeitsprozess des Verbrennungsmotors” 2009
- Lang, O. Salber, W. Hahn, J. Pischinger, S. et al. “Thermodynamical and Mechanical Approach Towards a Variable Valve Train for the Controlled Auto Ignition Combustion Process,” SAE Technical Paper 2005-01-0762 2005 10.4271/2005-01-0762
- Milovanovic, N. Chen, R. Turner, J. “Influence of the Variable Valve Timing Strategy on the Control of a Homogeneous Charge Compression (HCCI) Engine,” SAE Technical Paper 2004-01-1899 2004 10.4271/2004-01-1899
- Grill, M. Chiodi, M. Berner, H.-J. Bargende, M. Berechnung der thermodynamischen Stoffwerte von Rauchgas und Kraftstoffdampf beliebiger Kraftstoffe 11 Tagung “der Arbeitsprozess des Verbrennungsmotors” 2007
- Grill, M. Schmid, A. Chiodi, M. Berner, H.-J. et al. “Calculating the Properties of User-Defined Working Fluids for Real Working-Process Simulations,” SAE Technical Paper 2007-01-0936 2007 10.4271/2007-01-0936
- EnginOS GmbH User Manual and Online-Help-Desk TIGER www.enginos.de
- Vogt, R. Beitrag zur rechnerischen Erfassung der Stickoxidbildung im Dieselmotor Stuttgart 1975
- Grill, M. Objektorientierte Prozessrechnung von Verbrennungsmotoren 2006
- Bargende, M. Burkhardt, C. Frommelt, A. Besonderheiten der thermodynamischen Analyse von DE-Ottomotoren MTZ 62 2001 1
- Karst, D. Schnepf, M. von Berg, J. Wolfer, P. Burkhardt, C. Gnielka, M. Gossweiler, C. Ladungswechseloptimierung durch die geeignete Kombination von Indiziermesstechnik, Analyse und Simulation 9 Tagung “der Arbeitsprozess des Verbrennungsmotors” 2003
- Frommelt, A. Bargende, M. Möglichkeiten und Grenzen der Niederdruckindzierung zur Ladungswechselanalyse an PKW-Motoren Haus der Technik Essen 1997
- Bargende, M. Ein Gleichungsansatz zur Berechnung der instationären Wandwärmeverluste im Hochdruckteil von Ottomotoren 1991