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Towards a Thermally Robust Automotive Pre-Chamber Spark Plug for Turbocharged Direct Injection Gasoline Engines

Janas, Peter; Niessner, Werner

This study presents a first step towards a thermally robust passive pre-chamber spark plug for boosted direct injection gasoline engines, where the pre-chamber spark plug is used to precisely control the start of combustion, increase the engine efficiency, while decreasing pollutant emissions and providing a more stable combustion, compared to conventionally initiated combustion with a j-gap spark plug. The here presented passive pre-chamber spark plug can be integrated into an existing cylinder head design without introducing additional components. A new passive pre-chamber spark plug is proposed based on a surface discharge electrode configuration, in order to extend the operating range of a previously developed pre-chamber spark plug using a two pin ground electrode configuration. The new passive pre-chamber spark plug is based on a patented surface discharge concept (GB 2 361 264 A), which allowed us to create a barrier-free pre-chamber working volume, to better control the residual gas distribution, turbulence and flame front propagation inside the pre-chamber. The key parameters of the pre-chamber, such as prechamber volume and hole diameter were estimated in a first step by using a simple gas displacement model and by 3D heat transfer simulations, using thermal boundary conditions under typical full-load operating conditions. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000088323
Veröffentlicht am 08.06.2019
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kolbenmaschinen (IFKM)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2018
Sprache Englisch
Identifikator ISBN: 978-3-8169-3449-3
KITopen-ID: 1000088323
Erschienen in Ignition Systems for Gasoline Engines : 4th International Conference, December 6 - 7, 2018, Berlin, Germany. Ed.: M. Günther
Verlag expert-Verlag
Seiten 122-148
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