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|a E 1.99:1336937
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|a EXTENDING LEAN AND EGR-DILUTE OPERATING LIMITS OF A MODERN GDI ENGINE USING A LOW-ENERGY TRANSIENT PLASMA IGNITION SYSTEM
|h [electronic resource]
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|a Washington, D.C. :
|b United States. Department of Energy. Office of Energy Efficiency and Renewable Energy ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2015.
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|a text
|b txt
|2 rdacontent.
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|a computer
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|2 rdamedia.
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|a online resource
|b cr
|2 rdacarrier.
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|a Published through SciTech Connect.
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|a 11/08/2015.
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|a "118600"
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|a 2015 ASME Internal Combustion Engine Division Fall Technical Conference, 11/08/15 - 11/11/15, Houston, TX, US.
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|a Sevik, James Michael; Wallner, Thomas; Pamminger, Michael; Scarcelli, Riccardo; Singleton, Dan; Sanders, Jason.
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|a The efficiency improvement and emissions reduction potential of lean and EGR dilute operation of spark-ignition gasoline engines is well understood and documented. However, dilute operation is generally limited by deteriorating combustion stability with increasing inert gas levels. The combustion stability decreases due to reduced mixture flame speeds resulting in significantly increased combustion initiation periods and burn durations. A study was designed and executed to evaluate the potential to extend lean and EGR-dilute limits using a low-energy transient plasma ignition system. The low-energy transient plasma was generated by nano-second pulses and its performance compared to a conventional transistorized coil ignition system operated on an automotive, gasoline direct injection (GDI) single-cylinder research engine. The experimental assessment was focused on steady-state experiments at the part load condition of 1500 rpm 5.6 bar IMEP, where dilution tolerance is particularly critical to improving efficiency and emissions performance. Experimental results suggest that the energy delivery process of the low-energy transient plasma ignition system significantly improves part load dilution tolerance by reducing the early flame development period. Statistical analysis of relevant combustion metrics was performed in order to further investigate the effects of the advanced ignition system on combustion stability. Results confirm that at select operating conditions EGR tolerance and lean limit could be improved by as much as 20% (from 22.7 to 27.1% EGR) and nearly 10% (from λ=1.55 to 1.7) with the low-energy transient plasma ignition system.
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|b AC02-06CH11357.
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| 710 |
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|a Argonne National Laboratory.
|4 res.
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|a United States.
|b Department of Energy.
|b Office of Energy Efficiency and Renewable Energy.
|4 spn.
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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|u http://www.osti.gov/scitech/biblio/1336937
|z Online Access (via OSTI)
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|a .b105159001
|b 03-09-23
|c 05-17-19
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|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:1336937
|h Superintendent of Documents classification
|i web
|n 1
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