US Patent No: 5,111,790
Number of patents in Portfolio can not be more than 2000
Direct fire ignition system having individual knock detection sensor
Stats
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May 12, 1992
Issued date -
Sep 28, 1990
filing date -
07/590,301
serial no -
Expired
status
Importance
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Abstract
A direct fire ignition system for an internal combustion engine having a coil assembly attachable to each spark plug. Each coil assembly has a high voltage transformer for producing a voltage sufficient to cause the spark plug to generate a spark, an integral capacitor parallel with the spark plug, and a spark plug sensor circuit coupling to the high voltage transformer for generating a spark confirmation signal when a spark is generated. The spark sensor circuit is responsive to a high frequency signal generated in the high voltage transformer within a predetermined frequency range to generate the spark confirmation signal. The direct fire ignition system is compatible with single strike or multi-strike modes of operation. The system can also generate a probe voltage across the spark plug to test for auto or pre-ignition.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,502,454 Ignition system for an internal combustion engine | 33 | 1982 | |
| 5,003,958 Ignition coil mounting structure for engine | 26 | 1989 | |
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| 4,382,430 Ignition system | 7 | 1981 | |
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| 4,846,129 Ignition system improvements for internal combustion engines | 41 | 1988 | |
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| 4,547,734 Equipment for recognizing misfiring | 27 | 1983 | |
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| 4,825,844 Ignition system for an internal combustion engine | 9 | 1986 | |
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| 4,886,029 Ignition misfire detector | 53 | 1988 | |