Ignition system requirements and their application to the design of capacitor discharge ignition systems.
Kettering ignition systems used on the majority of automotive engines can no longer assure reliable ignition for high-output engines. The capacitor discharge ignition, CDI, is a promising system to supersede the obsolete battery-coil. This study examines wave-front requirements at the spark plug...
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| Language: | en_US |
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Monterey, California. Naval Postgraduate School
2012
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| Online Access: | http://hdl.handle.net/10945/15749 |
| Summary: | Kettering ignition systems used on the majority of automotive engines can
no longer assure reliable ignition for high-output engines. The capacitor discharge
ignition, CDI, is a promising system to supersede the obsolete battery-coil. This study examines wave-front requirements at the spark plug for producing
ignition in the internal combustion engine and system characteristics
necessary for producing the wave-front. Arc requirements are described and
used to define CDI parameters. A modified Kettering system which violates some basic ignition concepts
was replaced by a CDI system designed in this study. Its characteristics were
derived from arc requirements, not by aggrandizing the replaced battery-coil
parameters. During performance tests, the CDI system exhibited superior performance.
It fired simulated fouled plugs and continued to produce an arc when pressurized
tx) 3 times the value at which the Kettering ceased to function. This improved
performance was accomplished with approximately the same stored energy
and less input power. |
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