Electronic ignition circuit with automatic control advance
An electronic ignition system is described for an internal combustion engine having at least one sparkplug and a magneto having at least one magneto coil having a low voltage winding. It consists of: a charging circuit connected to the winding and providing a rectified output; a discharge condenser connected to the charging circuit and adapted to be charged by the output; a triggering circuit including an electronic switch having a control electrode and a high voltage transformer connected by the switch to the condenser and provided with means for connecting the transformer to the sparkplug; and a nonlinear network connected to the winding and responsive to a signal generated for triggering the electrode to effect a discharge of the condenser through the transformer to fire the sparkplug. The nonlinear network includes an electronic switching element in circuit with the electrode and the coil, and a logarithmic circuit element in the form of at least one diode in a feedback path between a gate and a principal electrode of the electronic switching element for advancing the firing point of the sparkplug with an increase in speed of the engine based upon changes in the configuration of the charging curve of the capacitor with frequency changes in the winding resulting from engine speed changes.
- Assignee:
- Wedtech Corp., New York, NY
- Patent Number(s):
- US 4697570
- OSTI ID:
- 5853852
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330101* -- Internal Combustion Engines-- Spark-Ignition
AUTOMATION
CAPACITORS
CONTROL SYSTEMS
DESIGN
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTRODES
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
MAGNET COILS
PULSE CIRCUITS
SPARK IGNITION ENGINES
SWITCHES
TRANSFORMERS
TRIGGER CIRCUITS