Internal-combustion engines – High tension ignition system – Current or voltage sensing in coil primary
Patent
1987-11-13
1990-07-31
Dolinar, Andrew M.
Internal-combustion engines
High tension ignition system
Current or voltage sensing in coil primary
123490, 315209T, 361152, 361154, F02P 305, H01H 4732
Patent
active
049442813
ABSTRACT:
The circuit according to the invention comprises a hysteresis comparator 9 connected to a transistor 2 controlling the current flowing in an inductive load 1. The voltage taken across the terminals of a measurement resistor 3 is compared with a reference voltage established by a source 6. According to the invention, a feedback loop 10 establishes a proportional action of the transistor 2 on the current in the load 1 when the voltage at S exceeds a predetermined threshold. In this way an oscillation is obtained between two values on either side of a nominal value, these two values being associated with the thresholds of the hysteresis comparator. Application to the production of an integrated circuit for the control of the ignition coil of an internal combustion engine.
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Patent Abstracts of Japan, vol. 3, No. 4 (M-45), Jan. 17, 1979.
Bendix Electronics S.A.
Boller George L.
Dolinar Andrew M.
Wells Russel C.
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