1. As one of the core components of modern automobile electronics, there may be multiple ECU electronic control units in the automobile, each of which manages different functions; There is information exchange between ECU systems;
2. Although the control system on the vehicle is becoming more and more complex, it must still have the most basic structure-microprocessor (CPU), memory (ROM, RAM), input/output interface (I/O), analog-to-digital converter (A/D) and large-scale integrated circuits such as shaping and driving. It is also easy to identify from the appearance-there is a control element in the electronic fuel injection system of the engine that is shaped like a square box, which is ECU；;
3. There are many slots around the element, which are used to connect many input and output circuits. Together with other electronic control components, it forms the brain and nerve center system of the automobile, and monitors various input data (such as braking and gear shifting). ) and various driving conditions of the car (acceleration, slippage, fuel consumption, etc. ) at any time, and according to the pre-designed program to calculate the information from various sensors. After processing, it sends all parameters to all relevant actuators for execution.
4.ECU was originally used to control the ignition and fuel injection of the engine, so it is an engine control unit in a narrow sense. Later, there were more and more electronic systems in automobiles, such as those for controlling chassis (ESP, ABS, ASR) and those for controlling transmission (TCU of automatic transmission). Therefore, these control units were collectively referred to as electronic control units, that is, ECU in a broad sense.