skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: EXTENDING LEAN AND EGR-DILUTE OPERATING LIMITS OF A MODERN GDI ENGINE USING A LOW-ENERGY TRANSIENT PLASMA IGNITION SYSTEM

Abstract

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 conditionsmore » 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.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technology
OSTI Identifier:
1336937
DOE Contract Number:
AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 2015 ASME Internal Combustion Engine Division Fall Technical Conference, 11/08/15 - 11/11/15, Houston, TX, US
Country of Publication:
United States
Language:
English

Citation Formats

Sevik, James Michael, Wallner, Thomas, Pamminger, Michael, Scarcelli, Riccardo, Singleton, Dan, and Sanders, Jason. EXTENDING LEAN AND EGR-DILUTE OPERATING LIMITS OF A MODERN GDI ENGINE USING A LOW-ENERGY TRANSIENT PLASMA IGNITION SYSTEM. United States: N. p., 2015. Web. doi:10.1115/ICEF2015-1048.
Sevik, James Michael, Wallner, Thomas, Pamminger, Michael, Scarcelli, Riccardo, Singleton, Dan, & Sanders, Jason. EXTENDING LEAN AND EGR-DILUTE OPERATING LIMITS OF A MODERN GDI ENGINE USING A LOW-ENERGY TRANSIENT PLASMA IGNITION SYSTEM. United States. doi:10.1115/ICEF2015-1048.
Sevik, James Michael, Wallner, Thomas, Pamminger, Michael, Scarcelli, Riccardo, Singleton, Dan, and Sanders, Jason. Thu . "EXTENDING LEAN AND EGR-DILUTE OPERATING LIMITS OF A MODERN GDI ENGINE USING A LOW-ENERGY TRANSIENT PLASMA IGNITION SYSTEM". United States. doi:10.1115/ICEF2015-1048.
@article{osti_1336937,
title = {EXTENDING LEAN AND EGR-DILUTE OPERATING LIMITS OF A MODERN GDI ENGINE USING A LOW-ENERGY TRANSIENT PLASMA IGNITION SYSTEM},
author = {Sevik, James Michael and Wallner, Thomas and Pamminger, Michael and Scarcelli, Riccardo and Singleton, Dan and Sanders, Jason},
abstractNote = {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.},
doi = {10.1115/ICEF2015-1048},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: