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Investigation of the Source of Increased Hydrocarbon Emissions Over the Life Cycle of Small Utility Engines
Technical Paper
2003-32-0022
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Small utility engines typically experience an increase in hydrocarbon emissions as they age. This is likely due to the formation of combustion chamber deposits (CCD) in the cylinders. The CCD originate primarily from oil entering the cylinder. This paper presents results from a study designed to determine the relative importance of various oil introduction mechanisms to the increase in hydrocarbon emissions and CCD formation. In the engines studied, it was found that early in the life cycles, approximately 20% of the increase is due to oil entering through the breather element, and approximately 45% is due to oil entering down the valve stems. The remaining increase is attributable to oil bypassing the piston rings and fuel effects.
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Citation
Reisel, J., Schmitt, A., and Ouradnik, Z., "Investigation of the Source of Increased Hydrocarbon Emissions Over the Life Cycle of Small Utility Engines," SAE Technical Paper 2003-32-0022, 2003, https://doi.org/10.4271/2003-32-0022.Also In
References
- EPA's Nonroad Engine Emissions Control Program: EPA420-F-99-001 U.S. Environmental Protection Agency Ann Arbor, MI 1999
- “Final Phase 2 Standards for Small Spark-Ignition Handheld Engines” U.S. Environmental Protection Agency, Office of Transportation and Air Quality March 2000
- Caceres, D. Reisel, J.R. Sklyarov, A. Poehlman, A. “Exhaust Emission Deterioration and Combustion Chamber Deposit Composition over the Life Cycle of Small Utility Engines,” ASME J. Eng. Gas Turbines and Power 125 358 364 2003
- Caceres, D. Reisel, J.R. Sklyarov, A. “Analysis of Combustion Chamber Deposit Formation in Small, Air-cooled, Utility Engines,” 2nd Joint Meeting of the U.S. Sections of the Combustion Institute Oakland, CA 2001
- Reisel, J.R. Dujmovic, J.W. Krajewski, J.T. “Effects of Engine Modifications on the Pollutant Emissions from Small Utility Engines,” 2002 Technical Meeting of the Central States Section of the Combustion Institute Knoxville, TN 2002
- Haidar, H.A. Heywood, J.B. “Combustion Chamber Deposit Effects on Hydrocarbon Emissions from a Spark-Ignition Engine,” SAE Paper No. 972887 1997
- Valdatoros, T.H. Wong, V.W. Heywood, J.B. “Fuel Additive Effects on Deposit Build-up and Engine Operating Characteristics,” Symposium on Fuel Composition/Deposit Tendencies American Chemical Society 36 1 1991
- Wagner, R.W. “The Effects of Fuel Composition and Deposit Control Additives on Combustion Chamber Deposits,” Proceedings of the CRC Workshop on Combustion Chamber Deposits 1993
- Bower, S.L. Litzinger, L.A. Frottier, V. “The Effect of Fuel Composition and Engine Deposits on Emissions from a Small Ignition Engine,” SAE Paper 932707 1993
- SAE J1088 Recommended Practice “Test Procedure for the Measurement of Gaseous Exhaust Emissions from Small Utility Engines,” 1993
- Federal Register “Control of Air Pollution; Emissions Standards for New Non-road Spark-Ignited Engines at or below 19 KW,” Fed. Reg. 30 CFR Parts 9 and 90, Final Rule 60 127 1995