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Effects of different prechamber spark plug geometries on combustion anomalies in an internal combustion engine
Technical Paper
2022-32-0023
ISSN: 0148-7191, e-ISSN: 2688-3627
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Language:
English
Abstract
Operating an Otto-Engine with hydrogen as fuel the probability of combustion anomalies like knocking, pre-ignition and backfiring increases significantly. Knocking is strongly dependent on the operating point, while the cause for preignition is still investigated. Literature as well as preliminary investigations to this work suggest that especially the spark plug has a significant influence on the occurrence of preignition and backfiring. Hence, the scope of this paper is to identify and understand the influence of the spark plug on preignition in order to reduce their occurrence and receive more mechanical power from the engine. In the first step, the operating conditions leading to preignition and backfiring are determined experimentally using a naturally aspirated single cylinder gas engine and a state-of-the-art prechamber spark plug. Afterwards, different prechamber designs of the spark plug, including a variation of the cap volume, thickness and the orifices diameter, are investigated with respect to their tendency to cause preignition. Additionally, measurements are done with a spark plug in which the electrode material has been changed. 3D-CFD simulations with the aim of visualizing the flow processes in the prechamber support the analysis of the experimental results and are the base for new prechamber designs.
Authors
- Sebastian Oswald Söhnlein - Technical University of Applied Sciences Amberg, University
- Jörn Alexander Judith - Technical University of Applied Sciences Amberg, University
- Sascha Holzberger - Technical University of Applied Sciences Amberg, University
- Marco Taschek - Technical University of Applied Sciences Amberg, University
- Maurice Kettner - Technical University of Applied Sciences Amberg, University
- Markus Klaissle - Technical University of Applied Sciences Amberg, University
- Danny Schwarz - Technical University of Applied Sciences Amberg, University
Topic
Citation
Oswald Söhnlein, S., Alexander Judith, J., Holzberger, S., Taschek, M. et al., "Effects of different prechamber spark plug geometries on combustion anomalies in an internal combustion engine," SAE Technical Paper 2022-32-0023, 2022, https://doi.org/10.4271/2022-32-0023.Also In
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