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Dispersal - OSTI GOV

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Last Updated: 16 October 2022

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The Effect of Spark-Plug Heat Dispersal Range and Exhaust Valve Opening Timing on Cold-Start Emissions and Cycle-to-Cycle Variability

The partnership for improving combustion engines is a U. S. Department of Energy consortium that includes multiple national laboratories and includes the aim of addressing key performance and emission barriers in light-duty engines fueled with a market-representative E10 gasoline. Among three distinct spark-plug heat dispersal ranges, there were sweeps of ignition timing 15 degrees-before-to-ten degrees-after top dead center firing across three separate spark-plug heat dispersal ranges. In addition, the effect of changing exhaust valve opening timing on combustion stability and emissions was also investigated. The effect on emissions was modest, according to reports, the spark plug HR affects the coefficient of change of NIMEP under all cold-start conditions, although the effect on emissions was found to be negligible. The percentage of fuel energy going into the exhaust was found to be similar to all spark plugs, and colder spark plugs needed higher air and fuel flow to achieve the desired 2bar NIMEP load.

Source link: https://www.osti.gov/biblio/1822062

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions