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Transferability of Insights from Fundamental Investigations into Practical Applications of Prechamber Combustion Systems

Kyrtatos, Panagiotis; Bardis, Konstantinos; Bolla, Michele; Denisov, Alexey; Wright, Yuri; Herrmann, Kai; Boulouchos, Konstantinos

Abstract:
Efforts to reduce CO2 emissions from spark ignition engines have driven engine development
to lean-burn or high-dilution operation, which results in high combustion variability
as well as increased unburned hydrocarbon emissions. A widely used technology
to reduce these issues are prechamber ignition systems, in which the external ignition
source is located in a separate small volume, connected to the main chamber via small
orifices. This setup allows for design of favourable ignition conditions near the ignition
source, which results in fast and repeatable early flame propagation. The pressure
increase resulting from combustion taking place inside the prechamber leads to the
ejection of jets containing hot combustion products and possibly active radicals into
the main chamber, which ignite the lean or diluted mixture; this process is often dubbed
turbulent jet ignition or TJI. The use of TJI systems in engines allows the combustion
of very lean/diluted mixtures, resulting in higher efficiencies and lower NOx emissions.
In this work we shed light into the importance of quenching for practical applications
involving turb ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000088611
Frei zugänglich ab 08.06.2019
Zugehörige Institution(en) am KIT Institut für Kolbenmaschinen (IFKM)
Publikationstyp Proceedingsbeitrag
Jahr 2018
Sprache Englisch
Identifikator ISBN: 978-3-8169-3449-3
urn:nbn:de:swb:90-886114
KITopen-ID: 1000088611
Erschienen in Ignition Systems for Gasoline Engines : 4th International Conference, December 6 - 7, 2018, Berlin, Germany. Ed.: M. Günther
Verlag expert Verlag, Tübingen
Seiten 442-459
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