An air intake heater system includes an air heater adapted to be positioned in communication with an intake passageway of an engine and a controller. The controller is operable to repeatedly supply current and discontinue the supply of current to provide a...

An intake air heating system for an internal combustion engine includes an electric heater that heats the intake air, a control circuit that switches a voltage to the electric heater based on a control signal and an over-temperature signal, a temperature s...