Extending Lean Operating Limit and Reducing Emissions of Methane Spark-Ignited Engines Using a Microwave-Assisted Spark Plug
Joint Authors
Nishiyama, Atsushi
DeFilippo, Anthony
Moon, Ahsa
Dibble, Robert W.
Chen, Jyh-Yuan
Ikeda, Yuji
Saxena, Samveg
Rapp, Vi H.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-08-21
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
A microwave-assisted spark plug was used to extend the lean operating limit (lean limit) and reduce emissions of an engine burning methane-air.
In-cylinder pressure data were collected at normalized air-fuel ratios of λ=1.46, λ=1.51, λ=1.57, λ=1.68, and λ=1.75.
For each λ, microwave energy (power supplied to the magnetron per engine cycle) was varied from 0 mJ (spark discharge alone) to 1600 mJ.
At lean conditions, the results showed adding microwave energy to a standard spark plug discharge increased the number of complete combustion cycles, improving engine stability as compared to spark-only operation.
Addition of microwave energy also increased the indicated thermal efficiency by 4% at λ=1.68.
At λ=1.75, the spark discharge alone was unable to consistently ignite the air-fuel mixture, resulting in frequent misfires.
Although microwave energy produced more consistent ignition than spark discharge alone at λ=1.75, 59% of the cycles only partially burned.
Overall, the microwave-assisted spark plug increased engine performance under lean operating conditions (λ=1.68) but did not affect operation at conditions closer to stoichiometric.
American Psychological Association (APA)
Rapp, Vi H.& DeFilippo, Anthony& Saxena, Samveg& Chen, Jyh-Yuan& Dibble, Robert W.& Nishiyama, Atsushi…[et al.]. 2012. Extending Lean Operating Limit and Reducing Emissions of Methane Spark-Ignited Engines Using a Microwave-Assisted Spark Plug. Journal of Combustion،Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-508750
Modern Language Association (MLA)
Rapp, Vi H.…[et al.]. Extending Lean Operating Limit and Reducing Emissions of Methane Spark-Ignited Engines Using a Microwave-Assisted Spark Plug. Journal of Combustion No. 2012 (2012), pp.1-8.
https://search.emarefa.net/detail/BIM-508750
American Medical Association (AMA)
Rapp, Vi H.& DeFilippo, Anthony& Saxena, Samveg& Chen, Jyh-Yuan& Dibble, Robert W.& Nishiyama, Atsushi…[et al.]. Extending Lean Operating Limit and Reducing Emissions of Methane Spark-Ignited Engines Using a Microwave-Assisted Spark Plug. Journal of Combustion. 2012. Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-508750
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-508750