Injection and Ignition Effects on Two-Stroke Direct Injection Emissions and Efficiency 961803
To help understand the fundamental processes involved in direct injection, a research project was conducted using a single-cylinder, two-stroke research engine at a mid-speed, boat load operating condition. A 24 statistical factorial experimental design was applied. Of the factors tested at this operating condition, spray type was the most important factor affecting hydrocarbon emissions, followed by in-cylinder flow-related factors. Injection spray was also most important for nitrogen oxide emissions, carbon monoxide emissions, and efficiency. The dominant mechanism influencing the results was misfire, with other mechanisms present for specific responses.
Citation: Syvertsen, M., Martin, J., Hoffman, J., Coates, S. et al., "Injection and Ignition Effects on Two-Stroke Direct Injection Emissions and Efficiency," SAE Technical Paper 961803, 1996, https://doi.org/10.4271/961803. Download Citation
Marc L. Syvertsen, Jay K. Martin, Jeffrey A. Hoffman, Sam W. Coates, Frank A. McGinnity
University of Wisconsin-Madison, Brunswick Corp., Outboard Marine Corp.
International Off-Highway & Powerplant Congress & Exposition
Design, Modeling, and Emission Control for Small Two- and Four-Stroke Engines-SP-1195, Two-Stroke Engines-PT-69, SAE 1996 Transactions - Journal of Engines-V105-3