Ignition system with safety circuit

Abstract From the Canadian patent

By means of an arrangement according to the invention an automatic recommencing of the ignition function of an internal combustion engine with a computer controlled ignition system is achieved. The system includes inter, alia, an oscillator which occasionally can stop working. An RC-circuit is charged by ignition pulses supplied by the micro-computer and is discharged by possible failure of these pulses. A sensing circuit influenced by the RC-circuit thereby supplies a so-called reset pulse to the computer which then recommences the supply of ignition pulses.