This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Gasoline Combustion with Future Fuels
Technical Paper
2007-26-021
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SIAT 2007
Language:
English
Abstract
This paper describes the demands and potentials of current and future gasoline combustion systems regarding the fuels gasoline, natural gas, and Hydrogen. At first, fuel specifications that are crucial for the spark ignition process are compared. These are compared with the requirements of the combustion system. Potentials for the compensation of power loss, efficiency improvement and emission reduction using alternative fuels are discussed taking into account fuel-specific properties. While full load drawbacks with natural gas compared with gasoline can be reduced to less than 5% by combustion system tuning, Hydrogen operation with port injection leads to reductions of about 25 to 30%. These drawbacks can be compensated with boosting where both methane and Hydrogen are qualified due to their burning characteristics. Compared with λ=1 operation especially Hydrogen offers efficiency benefits of up to 30% in a wide mapping range due to quality control. Here, the combustion at relative air-fuel ratios of 2 - 2.5 is nearly NOx-free. The combination of lean combustion and boosting permits to achieve indicated mean effective pressures of about 15 bar (peak pressure limited) combined with indicated specific fuel consumption close to 200 g/kWh and indicated NOx emissions lower than 0.5 g/kWh. Direct injection will lead to further improvements in full load performance. The results which are based upon engine tests show the possibility to realize combustion systems that can serve different fuels without or with only minor modifications. An optimum flex-fuel concept, however, can be achieved with Variable Compression Ratio (VCR).
Recommended Content
Authors
Topic
Citation
Lang, O., Habermann, K., Thiele, R., and Fricke, F., "Gasoline Combustion with Future Fuels," SAE Technical Paper 2007-26-021, 2007, https://doi.org/10.4271/2007-26-021.Also In
References
- European Commission White Paper on a Common Policy COM 370 Brussels 2001
- Menrad, H. König, A. “Alcohol Fuels” 3-211-81696-8 Springer 1982
- Berckmüller, M. et al. “The Hydrogen Combustion Engine with high Specific output - a Realistic Alternative to Gasoline and Diesel Engines” 2003
- Natkin, R. J. et al. “Hydrogen IC Engine Boosting Performance and NOx Study” SAE Paper No. 2003-01-0631
- Karonis, D. et al. “Impact of Ethanol Addition on Motor Gasoline Properties” TAE Convention on Fuels 2005 Ostfildern, Germany
- Kleinschmidt, W. “Research of the Working Cycle and the NO, NO 2 , and CO Formation in Gasoline Engines” RWTH Aachen 1974
- Rütten, O. et al. “Low Emission Concept for a Turbocharged Vehicle with Compressed Natural Gas Drive” Congress “2nd Emissions Control” Dresden 2004
- Federal Ministry of Research and Technology (BMFT) “Finding New Fuels - Alternative Fuels for Motor Vehicles” Gersbach & Sohn Verlag 1974
- Pischinger, S. et al. “The Path to Consequent Downsizing - Engine with Continuously Variable Compression Ratio in a Demonstration Vehicle” MTZ Engine Technology Magazine 64 2003
- Pischinger, S. et al. “Lean Burn High Boosted SI Engines for Gasoline, Gas and Reformulated Fuels” IFP Congress “Which Fuels For Low CO2 Engines?” Paris 2004
- Pischinger et al. “Natural Gas, Fuel of the Future - Efficient Combustion Systems and Applications” 20th Joint Association of German Engineers/VW “Future Fuels and Drives - Synergies for a Sustainable Future?” Wolfsburg 2003