This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Loss Analysis of a Direct-Injection Hydrogen Combustion Engine
Technical Paper
2018-01-1686
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
In the discussion on the reduction or complete avoidance of CO2-emissions and other pollutants in the transport sector, hydrogen as a carbon-free fuel, is an alternative to conventional fuels. The use of hydrogen in modern internal combustion engines offers a fast and cost-effective opportunity of decarbonisation of the transport sector.
The utilisation of hydrogen as fuel in internal combustion engine systems is more challenging than using conventional fuels. Hydrogen is highly flammable, which affects the requirements of the ignition system and the design of the combustion chamber. In addition, due to the gaseous state of H2 the question, how the fuel should be delivered to the combustion chamber is of high importance by means of engine performance. There are two fundamentally different concepts for hydrogen injection. Hydrogen can be injected by a multi-point injection into intake manifold by external mixture-formation (MPI) or directly into the combustion chamber (DI). When external mixture-formation is used, backfiring due to pre-ignition caused by local hotspots, has to be avoided. Furthermore, fuel backflows can occur as a result of pressure fluctuations which lead to inhomogeneous fuel distribution in the combustion chambers. Due to its low density, hydrogen expands strongly when it is injected in the intake manifold, resulting in fresh air displacement by hydrogen. Hereby effective the delivery rate of the internal combustion engine is significantly lowered.
By using H2 direct injection, the effect on the filling losses above mentioned are avoided. Due to the specific properties of hydrogen, the fuel preparation is quite complex. According to [1], the performance advantage by using a direct injection of H2 compared to a gasoline engine with port injection is 15%. In order to exploit the entire efficiency potential, it is eminent that the H2 injection takes place directly into the combustion chamber. Injection timing could be identified “as dominating influence factor [for] the combustion process and the resulting emissions” [2]. So for an optimized engine performance of an H2-DI engine, injection timing and injection strategy are crucial. The main focus of this study is an analysis of thermodynamic and mechanic losses of the H2-DI engine process to compare the efficiencies of DI with H2-MPI and Diesel compression-ignition (CI)-operation. For this purpose, a one-dimensional H2-DI simulation model was developed. The model is based on measured data of a H2-MPI engine which was derived from a commercial Diesel engine.
Recommended Content
Authors
Topic
Citation
Klepatz, K., Rottengruber, H., Zeilinga, S., Koch, D. et al., "Loss Analysis of a Direct-Injection Hydrogen Combustion Engine," SAE Technical Paper 2018-01-1686, 2018, https://doi.org/10.4271/2018-01-1686.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 |
Also In
References
- Eichlseder , H. , Wallner , T. , Freymann , R. , and Ringler , J. The Potential of Hydrogen Internal Combustion Engines in a Future Mobility Scenario SAE Technical Paper 2003-01-2267 2003 10.4271/2003-01-2267
- Eichlseder , H. and Klell , M. Wasserstoff in der Fahrzeugtechnik Wiesbaden Vieweg+Teubner 2010 978-3-8348-1027-4
- van Basshuysen , R. Ottomotor mit Direkteinspritzung und Direkteinblasung Wiesbaden Springer Fachmedien Wiesbaden 2017 978-3-658-12214-0
- Rottengruber , H. 1999 3-89791-047-0
- Deutsches Institut für Normung e.V. 2008
- Rosen , P.A. Wasserstoff als Energieträger und seine Eigenschaften Rosen , P.A. Beitrag zur Optimierung von Wasserstoffdruckbehaeltern: Thermische und… geometrische optimierung fr die automobile anwendu Springer, [S.l.] 2018 5 9 978-3-658-21123-3
- Zeilinga , S.C. , Koch , D.T. , Rottengruber , H. , Prümm , F.W. et al. Sustainable Mobility with Hydrogen - The Combustion Engine Gets ‘Green’: Description of the Simulative Development of an Innovative Hydrogen Propulsion 12. Tagung Gasfahrzeuge: Eine nachhaltigr Alternative 2017
- Pischinger , R. , Klell , M. , and Sams , T. Thermodynamik der Verbrennungskraftmaschine Wien Springer 2009 978-3211-99276-0
- Stroppe , H. Physik für Studenten der Natur- und Technikwissenschaften: Ein Lehrbuch Zum Gebrauch Neben Vorlesungen Thirteenth München Fachbuchverlag Leipzig im Hanser Verlag 2005 3-446-40047-8
- Jany , P. , Thieleke , G. , and Langeheinecke , K. Thermodynamik für Ingenieure: Ein Lehr-und Arbeitsbuch für das Studium Seventh Edition Wiesbaden Vieweg+Teubner Verlag/GWV Fachverlage GmbH 2008 978-3-8348-0418-1
- Weberbauer , F. , Rauscher , M. , Kulzer , A. , Knopf , M. et al. Allgemein gültige Verlustteilung für neue Brennverfahren MTZ Motortech Z 66 2 120 124 2005 10.1007/BF03227253
- Spuller , C. 2011
- Witt , A. 1999
- Bargende , M. Schwerpunkt-Kriterium und Automatische Klingelerkennung: Bausteine zur automatischen Kennfeldoptimierung bei Ottomotoren MTZ Motortech Z 56 632 638 1995
- DIN 1940 2003
- Ivanovich , I. Brennverlauf und Kreisprozess von Verbrennungsmotoren Berlin VEB Verlag der Technik 1970