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Demonstration of Advanced Emission Controls for Nonroad SI Class II Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 15, 2009 by SAE International in United States
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The U.S. Environmental Protection Agency has completed a program to demonstrate the feasibility of using low-cost engine management systems and modern, high-efficiency exhaust catalysts for nonroad spark ignition gasoline Class II engines (sub-19 kW, greater than 225 cc). Low-cost electronic engine management and fuel injection systems originally developed for motor-scooter and small motorcycle applications were installed on two 500cc single-cylinder spark-ignition lawn-and-garden engines. Integrated catalyst-muffler systems were developed for both engines and fuel control was calibrated to achieve emission control goals while maintaining or improving fuel consumption, engine durability and performance. NOx+HC emissions were reduced approximately 75% and brake-specific fuel-consumption improved by 6 to 12%. .
CitationMcDonald, J., Olson, B., and Murawski, M., "Demonstration of Advanced Emission Controls for Nonroad SI Class II Engines," SAE Technical Paper 2009-01-1899, 2009, https://doi.org/10.4271/2009-01-1899.
- Control of Emissions from Nonroad Spark-Ignition Engines and Equipment U.S. Federal Register 72 96 Friday May 18 2007
- EPA Technical Study on the Safety of Emission Controls for Nonroad Spark-Ignition Engines < 50 Horsepower http://www.epa.gov/otaq/regs/nonroad/equip-ld/phase3/420r06006-rpt-2appdx.pdf