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Spark Ignition System for Direct-Injected Gasoline Two Stroke Engine
Technical Paper
2012-32-0110
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The purpose of this paper is to describe a novel ignition system for a direct-injected 2-cycle engine. This system was developed and is utilized on Bombardier Recreational Products' E-TEC™ engine platforms for marine outboard engines and snowmobiles. Traditionally, powersport products have relied on capacitor discharge ignition systems due to the relatively short secondary voltage rise time seen at the plug gap during initial ionization. This characteristic provides a robust spark resulting in ionization at the gap of a contaminated spark plug nose cone. In other words, an ignition spark with a short rise time can fire a fouled spark plug in most instances. The disadvantage of a capacitor discharge system is the relatively short arc duration at the gap. With tighter emission requirements and customer expectations, the combustion quality has become more important than ever. It is well-accepted in the industry that a relatively long arc duration in the gap results in the higher probability of a complete combustion event [1]. Most inductive-type ignition systems provide long arc duration at the gap, but traditionally have fallen short with the short rise time characteristic. This paper will outline an ignition system capable of providing sufficient energy and spark duration while maintaining a short secondary voltage rise time at the spark plug gap. Test results for the system will be included as well as a comparison to other ignition system types.
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Citation
French, M., "Spark Ignition System for Direct-Injected Gasoline Two Stroke Engine," SAE Technical Paper 2012-32-0110, 2012, https://doi.org/10.4271/2012-32-0110.Also In
References
- Nakai, M. Nakagawa, Y. Hamai, K. Sone, M. “Stabilized Combustion in a Spark Ignited Engine through a Long Spark Duration,” SAE Technical Paper 850075 1985 10.4271/850075
- Lee, M. Hall, M. Ezekoye, O. Matthews, R. “Voltage, and Energy Deposition Characteristics of Spark Ignition Systems,” SAE Technical Paper 2005-01-0231 2005 10.4271/2005-01-0231
- Delphi Automotive LLP Delphi Ignition Coil Portfolio
- Miyashita, N. Matsubara, Y. Iwata, K. Ishikawa, M. “Spark Plugs for Gasoline Direct Injection Engines,” SAE Technical Paper 2001-01-1200 2001 10.4271/2001-01-1200
- Principles of Power Electronics Kassakian, J. Schlecht, M. Verghese, C. Addison-Wesley Publishing Company