Internal-combustion engines – High tension ignition system – Safety device
Patent
1996-12-09
1998-10-13
Dolinar, Andrew M.
Internal-combustion engines
High tension ignition system
Safety device
123643, 307 39, 307 41, F02P 3055
Patent
active
058197133
ABSTRACT:
An automotive ignition control system includes a vehicle control computer operable to provide electronic spark timing (EST) signals, a control circuit having a number of coil drive circuits connected thereto, a corresponding number of coil driver devices connected to respective ones of the coil drive circuits and a corresponding number of ignition coils connected to respective ones of the coil driver devices. The control circuit is responsive to an active state of any one of the EST signals to activate a corresponding one of the coil driver devices while inhibiting activation of all others. If any EST signal remains in an active state for an excessive time period, the control circuit is operable to lock-out the corresponding coil driver device from operation until such a fault condition is cleared. The control circuit is preferably operable to accomplish the lock-out function by gradually decreasing the coil current associated with the faulty EST signal in a fashion that does not generate a spark event.
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Delco Electronics Corporation
Dolinar Andrew M.
Funke Jimmy L.
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