ECU(ElectronicControlUnit) electronic control unit, also known as "trip computer" and "vehicle computer". In terms of use, it is a special microcomputer controller for automobiles.

Like an ordinary computer, it consists of a microprocessor (MCU), a memory (ROM, RAM), an input/output interface (I/O), an analog-to-digital converter (A/D) and a large-scale integrated circuit such as shaping and driving. To describe it in a simple sentence is "ECU is the brain of a car".

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Working principle of automobile ECU;

In general, the voltage working range of ECU is 6.5- 16V (internal key points have voltage regulators), the working current is 0.0 15-0. 1A, and the working temperature is -40℃~80℃. It can withstand the vibration below 1000Hz, so the probability of ECU damage is very small.

In ECU, CPU is the core component, which has the functions of calculation and control. When the engine is running, the signals of various sensors are collected and calculated, and the calculation results are converted into control signals to control the work of the controlled object. It also controls memory (ROM/FLASH/EEPROM, RAM), input/output interface (I/O) and other external circuits.

Baidu encyclopedia-ECU (electronic control unit)