Intelligent automotive voltage regulation system

An intelligent charging system (10) for an engine is disclosed that provides bi-directional information flow between a voltage regulator (2) and a powertrain control module (PCM). The powertrain control module establishes a voltage regulator setpoint by transmitting to the regulator a predetermined duty cycle and receiving from the regulator a field driver transistor duty cycle. The present invention increases battery life and, further, allows the powertrain control module to dynamically control generator output based on real-time load activity.