Abstract
A multi-parameter test matrix has been completed in an ethanol-fueled single-cylinder Waukesha ASTM-Cooperative Fuel Research (CFR) engine for studying microwave-assisted spark ignition performance under varied conditions, notably increased compression ratio, increased preheat, and increased charge dilution. Independent variables include compression ratio (9:1, 10.5:1, and 12:1); fuel water dilution by volume (0%, 20%, 30%, 40%); intake air temperature (22°C, 60°C); equivalence ratio (stoichiometric to lean-stability-limit); spark timing (advanced, maximum brake torque, retarded); and ignition strategy (spark only, spark with microwave). This report examines the extension of the stable operating range by a microwave-assisted spark plug, with data indicating that microwave-assisted spark ignition reduces cyclic variation as compared to spark-only ignition in highly-dilute mixtures at all tested compression ratios and intake air temperatures. Examination of the factors affecting microwave ignition performance shows diminished effects of microwave energy input when in-cylinder pressures are high at time of spark.
Original language | English (US) |
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Title of host publication | Fall Technical Meeting of the Western States Section of the Combustion Institute 2011, WSS/CI 2011 Fall Meeting |
Publisher | Western States Section/Combustion Institute |
Pages | 234-246 |
Number of pages | 13 |
ISBN (Electronic) | 9781618393043 |
State | Published - 2011 |
Externally published | Yes |
Event | Fall Technical Meeting of the Western States Section of the Combustion Institute 2011, WSS/CI 2011 - Riverside, United States Duration: Oct 17 2011 → Oct 18 2011 |
Publication series
Name | Fall Technical Meeting of the Western States Section of the Combustion Institute 2011, WSS/CI 2011 Fall Meeting |
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Other
Other | Fall Technical Meeting of the Western States Section of the Combustion Institute 2011, WSS/CI 2011 |
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Country/Territory | United States |
City | Riverside |
Period | 10/17/11 → 10/18/11 |
Bibliographical note
Publisher Copyright:Copyright © 2011 by the Western States Section/Combustion Institute All rights reserved.
ASJC Scopus subject areas
- General Chemical Engineering
- Physical and Theoretical Chemistry
- Mechanical Engineering