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Opportunities for making LPG a clean and low greenhouse emission fuel
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 11, 2005 by SAE International in United States
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It is shown that LPG has the potential to be a main stream fuel because of its low particulate emissions and low greenhouse emission potential. The experimental study reported is directed at minimising the cost of LPG optimised engines through the use of gas phase, throttle body injection in an engine with 11.7 compression ratio up from 9.65 of the base gasoline engine. The advantages of throttle body injection, guided by CFD studies, are extension of the lean limit to lambda 1.6, where NOx is low enough to meet Euro4 emission standards without a reducing catalyst, as deduced from bench test results. Comparison is also made between throttle body and both liquid and gas phase multipoint port injection. Differences in the method of mixing significantly affect engine performance. Notable improvements in emissions and thermal efficiencies were achieved when compared with gasoline, eg. Best emissions reductions of 88% for HC, 98% for NOx, 92% for CO, 38% for CO2 and a rise of 28% in thermal efficiency.
CitationWatson, H., Khan, M., Liew, G., and Baker, P., "Opportunities for making LPG a clean and low greenhouse emission fuel," SAE Technical Paper 2005-01-2217, 2005, https://doi.org/10.4271/2005-01-2217.
- Abraham, J. U. o. Minnesota et al. 1995 “Effects of combustion on in-cylinder mixing of gaseous and liquid jets.” SAE Paper 950467
- Abraham J., M. V. Macinnes J. Bracco F.V. 1994 Gas Versus Spray Injection: Which Mixes Faster? SAE Paper. 940895
- Baker, P. A. 2004 LPG: A Comparison of Multipoint Liquid and Gaseous Phase Injection - Current PhD Thesis Dept of Mechanical and Manufacturing Engineering Melbourne University of Melbourne
- Baker, P Watson H 2005 MPI Air/Fuel Mixing for Gaseous and Liquid LPG SAE paper 2005-1-0246
- Das, A. 1995 Optimisation of a natural gas spark ignition engine - PhD Thesis Department of Mechanical and Manufacturing Engineering Melbourne University of Melbourne
- IMechE 1996 Lean Burn Combustion Engines London IMechE Seminar Publications Ltd
- Farook, Y. 1994 Limits of performance of an SI engine operating on LPG and petrol - M.Eng Science Thesis Dept of Mech & Manufacturing Engineering,, University of Melbourne
- Liew, G. C. S. 2004 LPG Mixing in an Engine Inlet Manifold with Throttle Body Injection - M.Eng Science Thesis Mechanical and Manufacturing Engineering Melbourne Vic. University of Melbourne
- Goto Shinichi 1999 Performance and Emissions of an LPG Lean-Burn Engine for Heavy Duty Vehicles SAE Paper no. 1999-01-1513
- Walsh, M. 2004 Global trends in motor vehicle pollution control - 2004 Update FISITA Paper No. F2004V023
- Watson, H. C. Milkins E.E. 1982 Comparison and optimization of emission efficiency and power of five automotive fuels in one engine Int. J. of Vehicle Design 3
- Watson, H. C. 1999 Engine and Environmental Impacts - Euro 2 Compared with US City FTP SAE - A Paper No. 99099
- Watson, H. C. Gowdie D.R.R. 2000 “The systematic evaluation of twelve LP gas fuels for emissions and fuel consumption.” SAE Paper number 2000-01-1867
- Watson, H.C. Kumar, K C Beer T Graham P Olaru D Van der Schoot M 2004 Vehicle particulates their costs and future trends SAE-A seminar on Health costs of particulates Sydney
- Watkiss, P 2002 Health costs of Air Pollution in Australia UK AEA Report for Senate Select Enquiry into Fuel Taxation