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Diesel Smoke Measurement and Control Using an In-Cylinder Optical Sensor
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Abstract
An in-cylinder optical sensor has been developed to measure and control the exhaust smoke or soot emission from heavy-duty diesel engines. The sensor directly measures the radiant emission from incandescent soot particles during and after main combustion. Results show a strong correlation between both the measured duration and end of radiant emission, and the amount of soot emitted by the engine. Test results also demonstrated some potential benefits of in-cylinder control using the optical sensor. In one test, the optical signal was used to control high-load soot emission during changes in air intake pressure and temperature. In a second test, the optical signal was used to minimize the variability in exhaust soot levels caused by manufacturing variations in fuel-injector flow characteristics.
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Hartman, P., Plee, S., and Bennethum, J., "Diesel Smoke Measurement and Control Using an In-Cylinder Optical Sensor," SAE Technical Paper 910723, 1991, https://doi.org/10.4271/910723.Also In
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