A STRUCTURE FOR REDUCTION OF INPUT SIGNAL PORT IN A CONTROL UNIT OF VEHICLE

摘要

An input signal port reducing structure in an ECU(Electronic Control Unit) of a vehicle is provided to reduce the production cost for replacing an input IC(Integrated Circuit) or an MCU(Micro Control Unit) of the ECU by reducing the number of input ports in the ECU of the vehicle and to apply regulation in various methods according to signal condition of an input switch. An input signal port reducing structure in an ECU(100) of a vehicle comprises plural input switch ends(SW1~SW4) outputting on/off signals; an input port end(PORT1) of the ECU receiving signals according to operated condition of each input switch; and a voltage adjusting unit(20) connected between the input switch ends and the input port end of the ECU to change voltage allowed from an electric power source according to operated condition of each input switch. The input port end of the ECU is an input end(A) of an input IC or an MCU(10).