This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Mechanism of Combustion Chamber Deposit Formation
Annotation ability available
Sector:
Language:
English
Abstract
Two V-6 engine types were investigated for the physical mechanisms causing combustion chamber deposit (CCD) formation. Experimental techniques and parameters such as combustion chamber deposit weights, thicknesses, thermogravimetric analysis (TGA), inductively coupled plasma (ICP) and solid state 13C nuclear magnetic resonance (NMR) were used to determine both the chemical and physical characteristics of combustion chamber deposit material. An analysis of the results indicated a mechanism for combustion chamber deposit formation consistent with that originally developed by Lepperhoff.1 Lepperhoff proposed that four layers exist in the combustion chamber deposit morphology. In contrast, the investigation described below has led to identification of only two distinct CCD morphologies.
Recommended Content
Topic
Citation
Daly, D., Bannon, S., Fog, D., and Harold, S., "Mechanism of Combustion Chamber Deposit Formation," SAE Technical Paper 941889, 1994, https://doi.org/10.4271/941889.Also In
References
- Lepperhoff G. Houben M. “Mechanisms of Deposit Formation in Internal Combustion Engines and Heat Exchangers” SAE Paper No. 931032
- Bitting B. et al. “Intake Valve Deposit - Fuel Detergentcy Requirements Revisided” SAE Paper No. 872117
- Witze P.O. Hall M.J. Wallace J.S. “Fibre-Optic Instrumented Spark Plug for Measuring Early Flame Development in Spark Ignition Engines” SAE Paper No. 881638
- Solomon P.R. Fletcher T.H. Pugmine R.J. “Progress in Coal Pyrolysis” Fuel 72 587 1993
- Hgenel M.W. “Recent Progress in Coal Structure Research” Fuel 71 1211 1991
- Solum M.S. Pugmine R.J. Grant D.M. “ 13 C Solid-State NMR of Argonne Premium Coal,” Energy & Fuels 3 187 1989
- Pan V.H. Maciel G.E. “The Analysis of Three Representative Premium Coals by 13 C Nuclear Magnetic Resonance” Fuel 72 451 1993
- Edwards J.C. Choate P.J. “Average Molecular Structure of Gasoline Engine Combustion Chamber Deposits Obtained by Solid-State 13 C, 31P and 1H Nuclear Magnetic Resonance Spectroscopy” SAE Paper No. 932811
- Choate P.J. Edwards J.C. “Relationship Between Combustion Chamber Deposits, Fuel Composition and Combustion Chamber Deposit Structure” SAE Paper No. 932812
- Kalahatqi G.T. “Deposits in Gasoline Engines - A Literature Review” SAE Paper No. 902105