What are the main functions of the engine electronic control system?

The main function of the engine electronic control system is to control the air-fuel ratio and ignition timing of the fuel injection engine. In addition, there are auxiliary functions such as engine start, idle speed, speed limit, exhaust gas recirculation, cylinder closure, secondary air injection, intake pressurization, deflagration, generator output voltage, electric fuel pump, system self-diagnosis and so on.

Brief introduction of electronically controlled engine;

The biggest difference between electronically controlled engine and carburetor engine lies in the oil supply system. The fuel supply system of electronically controlled engine cancels the carburetor, but adds many electronic automatic control devices. It includes many sensors, actuators and ECU.

The electronically controlled engine should not only accomplish the tasks that the carburetor has to accomplish, but also accomplish the tasks that the carburetor is difficult to accomplish. For example, the air-fuel ratio concentration of combustible mixture can be controlled within the required range. The oil circuit and circuit of carburetor engine are clearly divided and do not affect each other.

The fuel supply system of the electronically controlled engine is added with an electronic control part, which makes the oil circuit and the circuit connected with each other, which not only affects the work of the engine fuel system, but also affects the normal work of the engine. Due to the increase of electronic control devices in electronically controlled engines, the overall structure of the engine (including the electronic control system) is more complicated.