The simplest is the calculator of the engine. It takes the data of each sensor on the engine, then calculates the injection time and the ignition time. And control other actuators, such as idle motors, fuel pumps, etc..
With the improvement of the electronic automation of the car, the ECU will be more and more, and the line will become more and more complicated. In order to simplify the circuit and reduce the cost, the car between a plurality of ECU information transmission will be called a multiplex communication network technology, the ECU will be a whole network system, which is the CAN data bus.
At present, in some middle and high grade cars, ECU is applied not only to the engine, but also to ECU in many other places. For example, anti lock braking system, 4 wheel drive system, electronic automatic transmission, active suspension system, airbag system, multi direction adjustable electric chair are all equipped with their own ECU
ECU (Electronic, Control, Unit) electronic control unit, also known as "driving computer", "on-board computer" and so on. From the purpose of use, it is a special microcomputer controller for automobiles. It is also called a single chip microcomputer for automobiles. Like ordinary microcontrollers, it consists of 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.
