The electronic control unit (ECU), the core control component of the electronically controlled fuel injection system, is actually a microcomputer. It has the following functions: the function of receiving signals from sensors and the function of processing sensor signals.

ECU electronic control unit, also known as "trip computer" and "vehicle computer". Like ordinary computers, it is composed of microcontroller, memory, input/output interface, analog-to-digital converter and large-scale integrated circuits such as shaping and driving.