Capacitor as ignition battery

This circuit and the capacitor discharge ignition system provide an independent ignition voltage source when the vehicle is started in cold weather. Before starting the car, S1 is set to the ON position to excite the DC to DC converter to charge C1 at 200 and 400V DC. The launcher is now running. If the battery voltage drops, the starter slowly starts the engine, and C1 still represents a fully charged 12V battery that can drive the ignition system for one minute.