This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental Study into a Hybrid PCCI/CI Concept for Next-Generation Heavy-Duty Diesel Engines
Technical Paper
2012-01-1114
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This paper presents the first results of an experimental study into a hybrid combustion concept for next-generation heavy-duty diesel engines. In this hybrid concept, at low load operating conditions, the engine is run in Pre-mixed Charge Compression Ignition (PCCI) mode, whereas at high load conventional CI combustion is applied. This study was done with standard diesel fuel on a flexible multi-cylinder heavy-duty test platform. This platform is based on a 12.9-liter, 390 kW heavy-duty diesel engine that is equipped with a combination of a supercharger, a two-stage turbocharging system and low-pressure and high-pressure EGR circuitry. Furthermore, Variable Valve Actuation (VVA) hardware is installed to have sufficient control authority. Dedicated pistons, injector nozzles and VVA cam were selected to enable PCCI combustion for a late DI injection strategy, free of wall-wetting problems. The decision to use a multi-cylinder configuration instead of a single-cylinder research engine was taken because this allows to assess the impact of limitations in operating range of current turbocharger equipment and that of cylinder interaction. It also allowed to assess control issues relevant for future production engines. First results are shown for four low load ESC operating points. Injection timing, EGR rate and effective compression ratio are varied to find suitable PCCI operating conditions with this equipment. The effect of these control parameters on combustion phasing, heat release, emissions (NO
, HC, CO, smoke), and fuel consumption is presented. Similar trade-offs are determined for conventional CI combustion at higher loads. From the experimental results, it is concluded that PCCI combustion is successfully realized up to 25% load, corresponding to 5.6 bar BMEP. Further optimization of TC matching and combustion is needed to improve PCCI fuel efficiency and especially high load CI operation.
Recommended Content
Authors
Topic
Citation
Doosje, E., Willems, F., Baert, R., and Van Dijk, M., "Experimental Study into a Hybrid PCCI/CI Concept for Next-Generation Heavy-Duty Diesel Engines," SAE Technical Paper 2012-01-1114, 2012, https://doi.org/10.4271/2012-01-1114.Also In
References
- Lee, S. Reitz, R. “Spray Targeting to Minimize Soot and CO Formation in Premixed Charge Compression Ignition (PCCI) Combustion with a HSDI Diesel Engine,” SAE Technical Paper 2006-01-0918 2006 10.4271/2006-01-0918
- Lewander, M. Ekholm, K. Johansson, B. Tunestål, P. et al. “Investigation of the Combustion Characteristics with Focus on Partially Premixed Combustion in a Heavy Duty Engine,” SAE Int. J. Fuels Lubr. 1 1 1063 1074 2009 10.4271/2008- 01-1658
- Alriksson, M. Denbratt, I. “Low Temperature Combustion in a Heavy Duty Diesel Engine Using High Levels of EGR,” SAE Technical Paper 2006-01-0075 2006 10.4271/2006-01-0075
- Lewander, M. Johansson, B. Tunestål, P. Keeler, N. et al. “Evaluation of the Operating Range of Partially Premixed Combustion in a Multi Cylinder Heavy Duty Engine with Extensive EGR,” SAE Technical Paper 2009-01-1127 2009 10.4271/2009-01-1127
- Hardy, W. Reitz, R. “A Study of the Effects of High EGR, High Equivalence Ratio, and Mixing Time on Emissions Levels in a Heavy-Duty Diesel Engine for PCCI Combustion,” SAE Technical Paper 2006-01-0026 2006 10.4271/2006-01-0026
- Kitabatake, R. Shimazaki, N. Nishimura, T. “Expansion of Premixed Compression Ignition Combustion Region by Supercharging Operation and Lower Compression Ratio Piston,” SAE Technical Paper 2007-01-3614 2007 10.4271/2007-01-3614
- Leermakers, C. Luijten, C. Somers, L. Kalghatgi, G. et al. “Experimental Study of Fuel Composition Impact on PCCI Combustion in a Heavy-Duty Diesel Engine,” SAE Technical Paper 2011-01-1351 2011 10.4271/2011-01-1351
- Ryan, T. “Engine controls; future requirements and challenges” IEEE/ ASME/ SAE Workshop on Open Problems and Challenges in Automotive Control 2008
- Hanson, R. Splitter, D. Reitz, R. “Operating a Heavy-Duty Direct-Injection Compression-Ignition Engine with Gasoline for Low Emissions,” SAE Technical Paper 2009-01-1442 2009 10.4271/2009-01-1442
- Kalghatgi, G. Risberg, P. Ångström, H. “Advantages of Fuels with High Resistance to Auto-ignition in Late-injection, Low-temperature, Compression Ignition Combustion,” SAE Technical Paper 2006-01-3385 2006 10.4271/2006-01-3385
- Baert, R. Frijters, P. Somers, B. Luijten, C. et al. “Design and Operation of a High Pressure, High Temperature Cell for HD Diesel Spray Diagnostics: Guidelines and Results,” SAE Technical Paper 2009-01-0649 2009 10.4271/2009-01-0649
- Naber, J. Siebers, D. “Effects of Gas Density and Vaporization on Penetration and Dispersion of Diesel Sprays,” SAE Technical Paper 960034 1996 10.4271/960034
- Colliou, T. Tilagone, R. Martin, B. “Adapting the NADI Concept to Heavy Duty Engines” Oil&Gas Science and Technology - Rev. IFP 61 73 84 2006
- Higgins, B. Mueller, C. Siebers, D. “Measurements of Fuel Effects on Liquid-Phase Penetration in DI Sprays,” SAE Technical Paper 1999-01-0519 1999 10.4271/1999-01-0519