This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Mechanisms of Deposit Formation in Internal Combustion Engines and Heat Exchangers
Annotation ability available
Sector:
Language:
English
Abstract
During the lifetime of an internal combustion engine, deposits are formed at various locations. In diesel engines, deposits in the combustion chamber and at the injection nozzles lead to an increase in the emissions, especially the particulate emissions, and the exhaust gas odor. Additionally, durability problems can also arise. Deposits in the combustion chamber of SI engines can increase the octane requirement, deposits at intake valves can reduce engine efficiency and driveability and increase emissions. A detailed theory on the mechanism of deposit formation, considering the physical effects, is presented. This theory contains a deposit transport mechanism, a mechanism of deposit attachment including an induction phase, a deposit growth phase and a deposit removal mechanism. This complex theory is based on fundamental investigations at different locations in and around internal combustion engines. From these investigations, the effects of surface temperature, gas temperature, turbulent gas flow, and gas composition on deposit formation in internal combustion engines will be demonstrated.
Recommended Content
Authors
Topic
Citation
Lepperhoff, G. and Houben, M., "Mechanisms of Deposit Formation in Internal Combustion Engines and Heat Exchangers," SAE Technical Paper 931032, 1993, https://doi.org/10.4271/931032.Also In
References
- Weber O. Aachen August 1990
- Lepperhoff G. Weber O. Test Procedure for the Determination of Deposits on Inlet Valves of Combustion Engines CEC Symposium Paris 1989
- Walker K.L. Homsy G.M. Geyling F.T. Thermophoretic Deposition of Small Particles in Laminar Tube Flow Journal of Colloid and Interface Science 1979
- Kittelson D.B. Ambs J. Hadjkacem H. Particulate Emissions from Diesel Engines: Influence of In-Cylinder Surface International Congress and Exposition Detroit, Michigan 1990 SAE Paper No. 900645
- Röhl. L.P. Berlin 1971
- Beal S.K. Deposition of Particles in Turbulent Flow on Channel or Pipe Walls Nuclear Science and Engineering 1970
- Cleaver J.W. Yates B. A Sub Layer Model for the Deposition of Particles from a Turbulent Flow Chemical Engineering Science 1975
- Schommers J. 1986
- Lepperhoff G. Schommers J. Weber O. Leonhardt H. Mechanisms of Deposit Formation at Inlet Valves SAE Paper No. 872115
- Lepperhoff G. Deposit Formation on Inlet Valves: The Influence of Mixture Formation as well as the Interaction between Oil Fuel and Exhaust Gas Xth European Automotive Symposium Oct. 1990
- Fabri J.
- Rosner D.E. Seshadri K. Experimental and theoretical studies of the laws governing condensate deposition from combustion gases 18. symposium on combustion Waterloo, Canada 1990
- Amelin A.G. Theory of Fog Condensation Second Derygagin B.V. 1967
- Reichel S. Aachen 1983
- N.N. A Pocket Guide to Crankase Engine Lubricants Additives Division Shell International Chemical Company Ltd., Shell Center London
- Rüdinger V. 1974
- Meyers P.S. Uyehara O.A. DeYoung R. Fuel Composition and Vaporization Effects on Combustion Chamber Deposits U.S. Dept. of Energy Report No. DOE/CS/50020 12/ 1981
- Davis J.T. A New Theory Of Aerosol Deposition From Turbulent Fluids Chemical Engineering Science 1983
- Lepperhoff G. Weber O.
- Minh T.B. Rostock 1976
- Parker W.J. Genkins R.J. Butter C.P. Abbott G.L. Flash Method of Determining Thermal Diffusivity, Heat Capacity and Thermal Conductivity J. Appl. Phys. 32 1969 1679