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Deposit Control Additive Effects on CCD Formation Engine Performance and Emissions
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English
Abstract
Concerns over the effects of combustion chamber deposits (CCD) on engine performance coupled with increasing environmental pressures on vehicle exhaust emissions, have forced the original equipment manufacturers (OEMs) to call for control of fuel compositions to preclude or minimise deposit formation in the combustion chamber. However, this is currently not felt to be feasible, given the scarcity of data on the effect of CCD on emissions, and the lack of an industry standard measurement technique. This paper describes a two-year project which demonstrates the positive impact that a fully synthetic CCD control additive system has on engine performance and emissions. The same programme demonstrates that tailpipe HC, CO, and NOx all directionally increased after the deposit accumulation period, but only NOx decreased with the removal of CCD. Engine-out NOx emissions increase with heavy CCD weight.
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Authors
Citation
Papachristos, M., Williams, D., Vincent, M., and Raath, A., "Deposit Control Additive Effects on CCD Formation Engine Performance and Emissions," SAE Technical Paper 952444, 1995, https://doi.org/10.4271/952444.Also In
References
- Callison J C Wusz T Biller W F “Trends in Octane Requirement Increase” SAE Paper No. 892036
- Reitz R D Kuo T W “Modelling of HC Emissions Due to Crevice Flows in PreMixed-Charge Engines” SAE Paper No. 892085
- Dyer T M “Sources of Unburnt Hydrocarbon Emissions From Homogeneous-Charge Automotive Engines” Sandia National Laboratories Livermore, CA. 1983
- Wagner R W “The Effects of Fuel Composition and Deposit Control Additives on Combustion Chamber Deposits” Proceedings of CRC Workshop on Combustion Chamber Deposit November 1993
- Houser K R “The Effect of CCD on NOx Emissions” Proceedings of the CRC Workshop on Combustion Chamber Deposits November 1993
- Bitting W H Firmstone G P Keller C T “Effects of Combustion Chamber Deposits on Tailpipe Emissions” SAE Paper No. 940435
- Studzinski W M Liva P M Choate P J Acker W P Litzinger T Bower S Smooke M Brezinski K “A Computational and Experimental Study of Combustion Chamber Deposit Effects on NOx Emissions” SAE Paper No. 932815
- Bower S L Litzinger T A Frottier V “The Effect of Fuel Composition and Engine Deposits on Emissions From a Spark Ignition Engine” SAE Paper No. 932707
- Nakamura, Y. Yonekawa, Y. Okamoto, N. “The Effect of Combustion Chamber Deposits on Octane Requirement Increase and Fuel Economy” Chemistry of Engine Combustion Chamber Deposits Ebert, L.B. Plenum Press 1985
- Papachristos M J Raath A Trainor M “Effects of Gasoline Detergent Additives on Formation of Intake Valve and Combustion Chamber Deposits” Congress International S.I.A. Paris 15-16 November 1994
- Peyla R “Deposit Control Additives for Future Gasolines: A Global Perspective” Fuel Reformulation Magazine March April 1995