Internal-combustion engines – High tension ignition system – Current or voltage sensing in coil primary
Patent
1986-05-08
1987-12-01
Nelli, Raymond A.
Internal-combustion engines
High tension ignition system
Current or voltage sensing in coil primary
123650, 123652, F02P 312
Patent
active
047096845
ABSTRACT:
To control the ON or conduction time of a transistor (4) serially connected with the primary winding (2) of an ignition coil, the voltage drop across the collector or base respectively, and emitter is sensed and used as a control parameter with respect to a set or reference value determining current flow through the ignition coil under conditions of complete discharge of stored energy from the ignition coil. Conditions of complete discharge occur within a first speed range; in other speed ranges, in which residual stored energy remains within the ignition coil, indicative of current flow therethrough starting from a value other than zero or null, the voltage sensed across the transistor is compared with the reference value, and the current flow time adjusted in dependence on the comparison.
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Kaiser Gunther
Krauter Immanuel
Nelli Raymond A.
Robert & Bosch GmbH
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