Transistor Switched Ignition Systems
G. E. Spaulding · SAE technical papers on CD-ROM/SAE technical paper series · 1960
THE TRANSISTOR SWITCHED ignition system may replace induction coil for applications where a premium can be paid for reliability. This paper describes the design features and advantages of this system, along with applications. The new system can be used interchangeably with the present conventional induction coil. Using a slow coil (high-tension transformer) the system features: 1. Voltage output which is relatively flat throughout the engine speed range. 2. Reduced contact current giving unlimited electrical life and reliability of contacts. 3. Performance under fouling conditions at least equal to the present induction coil. 4. Voltage ceiling flexibility — the voltage can be raised to provide for possible future engine designs.*