Assessment of spark, corona, and plasma ignition systems for gasoline combustion

Sayan Biswas, Isaac Ekoto, Dan Singleton, Kristapher Mixell, Patrick Ford

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the present study, the performance and emissions characteristics of three low-temperature plasma (LTP) ignition systems were compared to a more conventional strategy that utilized a high-energy coil (93 mJ) inductive spark igniter. All experiments were performed in a single-cylinder, optically accessible, research engine. In total, three different ignition systems were evaluated: (1) an Advanced Corona Ignition System (ACIS) that used radiofrequency (RF) discharges (0.5 - 2.0 ms) to create corona streamer emission into the bulk gas via four-prong electrodes, (2) a Barrier Discharge Igniter (BDI) that used the same RF discharge waveform to produce surface LTP along an electrode encapsulated completely by the insulator, and (3) a Nanosecond Repetitive Pulse Discharge (NRPD) ignition system that used a non-resistor spark plug and positive DC pulses (~10 nanoseconds width) for a fixed frequency of 100 kHz, with the operating voltage-controlled to avoid LTP transition to breakdown. For the LTP ignition systems, pulse energy and duration (or number) were varied to optimize efficiency. A single 1300 revolutions per minute (rpm), 3.5 bar indicated mean effective pressure (IMEP) homogeneous operating point was evaluated. Equivalence ratio (ϕ) sweeps were performed that started at stoichiometric conditions and progressed toward the lean limit. Both the ACIS and NRPD ignition systems extended the lean limit (where the variation of IMEP < 3%) limit (ϕ = 0.65) compared to the inductive spark (ϕ = 0.73). The improvement was attributed to two related factors. For the ACIS, less spark retard was required as compared to spark ignition due to larger initial kernel volumes produced by four distinct plasma streamers that emanate into the bulk gas. For the NRPD ignition system, additional pulses were thought to add expansion energy to the initial kernel. As a result, initial flame propagation was accelerated, which accordingly shortens early burn rates.

Original languageEnglish (US)
Title of host publicationASME 2020 Internal Combustion Engine Division Fall Technical Conference, ICEF 2020
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791884034
DOIs
StatePublished - 2021
EventASME 2020 Internal Combustion Engine Division Fall Technical Conference, ICEF 2020 - Virtual, Online
Duration: Nov 4 2020Nov 6 2020

Publication series

NameASME 2020 Internal Combustion Engine Division Fall Technical Conference, ICEF 2020

Conference

ConferenceASME 2020 Internal Combustion Engine Division Fall Technical Conference, ICEF 2020
CityVirtual, Online
Period11/4/2011/6/20

Bibliographical note

Funding Information:
The authors would like to thank Alberto Garcia and Keith Penney for their dedicated support of the Gasoline Combustion Fundamentals Laboratory. The work was performed at the Combustion Research Facility, Sandia National Laboratories, Livermore, CA. Financial support was provided by the U.S. Department of Energy, Vehicle Technologies Office. Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly-owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.

Funding Information:
The authors would like to thank Alberto Garcia and Keith Penney for their dedicated support of the Gasoline Combustion Fundamentals Laboratory. The work was performed at the Combustion Research Facility, Sandia National Laboratories, Livermore, CA. Financial support was provided by the U.S. Department of Energy, Vehicle Technologies Office. Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly-owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy's National Nuclear Security Administration under contract DENA0003525.

Publisher Copyright:
Copyright © 2020 ASME

Keywords

  • Advanced ignition system
  • Corona ignition
  • Nanosecond repetitive pulsed ignition
  • Plasma ignition
  • Spark ignition

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