RESEARCH ANALYSIS: Trends in spark and glow plugs
Designed to be combined with a high-tension magneto ignition system, the spark plug solved what Carl Benz had described as 'the most fundamental obstacle to early motoring'. Over a century later, the key factors driving spark plug innovation include emissions legislation, engine design and longer service intervals. Still plugging away, Matthew Beecham reports on the latest developments in spark and glow plugs.
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