This content is not included in your SAE MOBILUS subscription, or you are not logged in.
The Impact of Intake Valve Deposits on Exhaust Emissions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1992 by SAE International in United States
Annotation ability available
This paper presents the results of a twenty- vehicle program designed to determine the functional relationship between intake valve deposit level and exhaust emissions. The “identical” 1990 model year vehicles used for this program had accumulated over 80,000 kilometers in taxi fleet service and had developed average intake valve deposit levels which ranged from 6 to 9 on the Coordinating Research Council merit scale.
The exhaust emissions from these vehicles were measured in triplicate tests using the 1975 Federal Test Procedure. The intake valve deposits were then mechanically cleaned in-situ, and exhaust emissions were again measured in triplicate. Special procedures were followed to minimize vehicle-to- vehicle variability and to obtain statistically meaning ful results.
Results showed intake valve deposits to have a significant adverse effect on exhaust emissions. The relationship between intake valve deposit ratings and tailpipe emissions was determined to be linear with heavier deposits causing higher emissions. While this program focused on one particular engine and vehicle model, it is expected that the observed effects are not unique.
CitationHouser, K. and Crosby, T., "The Impact of Intake Valve Deposits on Exhaust Emissions," SAE Technical Paper 922259, 1992, https://doi.org/10.4271/922259.
SAE 1992 Transactions: Journal of Fuels & Lubricants
Number: V101-4; Published: 1993-09-01
Number: V101-4; Published: 1993-09-01
- Kaighatgi, G. 1 “Deposits in Gasoline Engines - a Literature Review,” SAE Paper 902015
- Gething, J. A. “Performance Robbing Aspects of Intake Valve and Port Deposits,” SAE Paper 872116
- Dumont, L. F. “Possible Mechanisms by Which Combustion Chamber Deposits Accumulate and Influence Knock,” SAE Transactions 5 565 576 1951
- Warren, J. “Combustion Chamber Deposits and Octane Number Requirement,” SAE Transactions 62 583 1954
- Liekkannen, H. E. Bechman, E. W. “The Effect of Leaded and Unleaded Gasolines on Exhaust Emission as Influenced by Combustion Chamber Deposits,” SAE Paper 710843
- Huls, T. A. Nickol, H. A 1nfluence of Engine Variables on Exhaust Oxides of Nitrogen Concentrations from a Multicylinder Engine,” SAE Paper 670482
- Wentworth, J. T. “More on Origins of Exhaust Hydrocarbons- Effects of Zero Oil Consumption, Deposit Location, and Surface Roughness,” SAE Transactions 81 1972
- Haskell, W. W. Legate, C. E. “Exhaust Hydrocarbon Emissions from Gasoline Engines - Surface Phenomena SAE Paper 720255
- Taniguchi, B. Y. Peyla, R. J. Parsons, G. M. Hoekman, S. K. Voss, D. A. 1njector Deposits the Tip of Intake System Deposit Problems,” SAE Paper 861534
- A. Jewitt, C. H. Bostick, G. L. Kersey, V. L. “Fuel Injector, Intake Valve, and Carburetor Detergency Performance of Gasoline Additives,” SAE Paper 872114
- Bitting, B. Gschwendtner, F. Kolhepp, W. Kothe, M. Testvoet, C. Ziwica, K. 1ntake Valve Deposits - Fuel Detergency Requirements Revisited,” SAE Paper 872117
- Proceedings of the CRC Workshop on Intake Valve Deposits San Francisco, California August 1989 Coordinating Research Council, Inc. Atlanta, Georgia
- Minoru, T. Okada, M. Katayama, H. Nakada, M. “Effect of Gasoline Quality on Throttle Response of Engines During WarmUp,” SAE Paper 900163
- Gasoline Market Survey Letter Oil Company CE0s Transou R. H. Engine Division May 6 1991
- Colucci, J. M. Automotive Fuels for the 1990's - Challenges and Opportunities,” Dewitt and Company Petrochemical Review Houston, Texas March 1989
- United States Clean Air Act Amendments of 1990 November 1990
- Auto/Oil AirQuality Improvement Research Program 1nitial Mass Exhaust Emissions Results From Reformulated Gasolines,” December 1990
- “CRC Carburetor and Induction System Rating Manual” Coordinating Research Council, Manual No. 16 1987
- Iwata, M. Furuhashi, M. Ujihashi, M. “Two-hole Injector Improves Transient Performance and Exhaust Emissions of 4-valve Engines,” SAE Paper 870125
- Robison, J. A. Brehob, W. W “The Influence of Improved Mixture Quality on Engine Exhaust Emissions and Performance,” Journal of Air Pollution Control Association 17 7 July 1967
- Amann, C. A. “Control of the Homogeneous Charge Passenger-Car Engine - Defining the Problem,” SAE Paper 801440
- Kashiwaya, M. Kosuge, T. Nakagawa, K. Okamoto, Y. “The Effect of Atomization of Fuel Injectors on Engine Performance,” SAE Paper 900261
- Katashiba, K Nishida, M. Washino, S. Takahashi, K Hashimoto, T. Miyake, M. “Fuel Injection Control Systems that Improve Three Way Catalyst Conversion Efficiency,” SAE Paper 910390
- Hawkins, D. M. Perold, A. F. 1977 On the Joint Distribution of Left and Right-Sided Outlier Statistics Utilitas Mathematica 12 129 143
- Box, G. E. P. Hunter, W. G. Hunter, J. S. 1978 Statistics for Experimenters, An Introduction to Design, Data Analysis and Model Building John Wiley and Sons, Inc. New York