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Influence of Combustion Chamber Deposits on Vehicle Performance and Tailpipe Emissions
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Abstract
An experimental programme has been carried out to quantify the influence of Combustion Chamber Deposit (CCD) removal on vehicle acceleration performance, fuel consumption and tailpipe emissions in several modern European car models. Vehicles were performance and emissions tested dirty', following accumulation of 16,000 kilometres (10,000 miles) with a light duty cycle, then ‘clean’, following removal of CCDs. This scheme was repeated for one model using a heavy duty driving cycle. Additional tests were carried out on three vehicle models equipped with knock-sensors for which ignition timing was monitored. CCDs reduced fuel consumption relative to the clean engine, in amounts dependent on vehicle model. CCDs had only small, detrimental effects on acceleration performance and power. They generally (but not always) increased NOx emissions and had variable and usually small effects on HC and CO emissions. Under fairly extreme, knock-critical conditions, vehicles with knock-sensors can show neutral or slightly increased fuel consumption with CCDs present, due to ignition timing retard.
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Barnes, J. and Stephenson, T., "Influence of Combustion Chamber Deposits on Vehicle Performance and Tailpipe Emissions," SAE Technical Paper 962027, 1996, https://doi.org/10.4271/962027.Also In
References
- Kalghatgi G.T. “Combustion chamber deposits in spark-ignition engines: A literature review” SAE. 952443
- Woodyard M.E. “Gasoline additive and deposit effects on the road and a Ford 2.3L engine test” SAE. 952446
- Studzinski W.M. Liva P.M. Choate P.J. Acker W.P. Litzinger T. Bower S. Smooke M. Brezinsky K. “A computational and experimental study of combustion chamber deposit effects on NOx emissions” SAE. 932815
- Harpster M.O. Jr. Matas S.O. Fry J.H. Litzinger T.A. “An experimental study of the influence of fuel composition and combustion chamber deposit effects on emissions from a spark ignition engine” SAE. 950740
- Graiff L.B. “Some new aspects of deposit effects on engine octane requirement increase and fuel economy” SAE. 790938
- Yonekawa Y. Nakamura K. Okamaoto N. “The study of combustion chamber deposits (Part 5): The role of CCDs in fuel economy” J. Japan Petroleum Instistute 25 1777 182 1982
- Heywood J.B. “Internal combustion engine fundamentals McGraw Hill Book Co. 1988
- Cornetii G. Liguori V. Zanoni G. Amedola L. “Power loss due to combustion chamber deposits” Journal of Automotive Engineers 8 14 June 1971
- McNally M. Callison J. Evans B. Graham J. Swaynos D. Uihlein J. Wutz T. “Effects of gasoline octane quality on vehicle acceleration performance - A CRC study” SAE 912394
- McNally M. Benson J. Callison J. Graham J. Wutz T. Evans B. “Coordinating Research Council. Quantifying performance of knock-sensor equipped vehicles with varying octane level fuels” SAE. 892037
- Price R.J. Wilkinson J.P.T. Jones D.A.J. Morley C. “A laboratory simulation and mechanism for the fuel dependence of SI combustion chamber deposit formation” SAE. 952445
- Megnin M.K. Choate P. “Combustion chamber deposit measurement techniques” SAE. 940346
- Owens J.P. “Comparison of cylinder head deposit thickness and weight data in fleet and dynamometer testing” SAE. 952448
- Kalghatgi G.T. McDonald C.R. Hopwood A.B. “An experimental study of combustion chamber deposits and their effects in spark-ignition engines” SAE. 950680
- Petroleum products - determination and application of precision data in relation to methods of test