Computers and Control Systems: Description and Operation

The Digifant I fuel and ignition control system is a development of the Digi-Jet fuel injection system, used on early model Volkswagens, combined with map controlled digital ignition system. Through the use of a single control unit, all of the functions of the fuel system, ignition system and oxygen sensor system are carefully controlled to provide optimum mixture and ignition control for improvements in acceleration, deceleration and overall driveability. The Digifant I system features a larger throttle bore diameter, increased from 1.771 inch to 1.968 inch. An idle stabilizer system has been incorporated to further streamline the system and eliminates the need for a digital idle speed stabilizer and auxiliary air regulator.