Internal-combustion engines – High tension ignition system – Electronic cylinder sequencing
Patent
1996-08-21
1997-12-02
Nelli, Raymond A.
Internal-combustion engines
High tension ignition system
Electronic cylinder sequencing
F02P 312
Patent
active
056924844
ABSTRACT:
A circuit for providing a synchronizing signal based on detected ignition voltages in a coil-per-plug ignition system. In this type of ignition system, each spark plug has its own step-up transformer, typically packaged in close proximity to the spark plug itself. Normally, the plugs are fired individually to extend plug life, but according to this invention, at least two of the plugs are fired concurrently during engine cranking. During such operation, the circuit senses the voltages at the primary transformer windings of two different spark plugs to identify the respective spark plug firings, and the synchronizing signal is produced based on the sequence of the identified firings.
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Delco Electronics Corp.
Navarre Mark A.
Nelli Raymond A.
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