Golf 4 air flow meter | What is ECU | SILVER(coriolis flow meter)

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1. What does ECU refer to?

ECU is the abbreviation of the first three letters of the English name (Electrical control unit), which means electronic control unit in Chinese. In terms of usage, it is a car specific microcomputer controller, also known as a car specific microcontroller. It is composed of a microprocessor (CPU), memory (ROM, RAM), input/output interface (I/O), analog-to-digital converter (A/D), as well as large-scale integrated circuits such as shaping and driving, just like a regular microcontroller. The voltage working range of ECU is generally between 6.5-16V (with voltage stabilizing devices at key internal locations), the working current is between 0.015-0.1A, and the working temperature is between minus 40-80 degrees Celsius. It can withstand vibrations below 1000Hz, so the probability of ECU damage is very small. The CPU is the core part of the ECU, which has the functions of calculation and control. When the engine is running, it collects signals from various sensors, performs calculations, and converts the results of calculations into control signals to control the operation of the controlled object. It also controls memory (ROM, RAM), input/output interfaces (I/O), and other external circuits; The program stored in the ROM is based on accurate calculations and a large amount of experimental data. This inherent program continuously compares and calculates with the signals collected from various sensors during engine operation. Control the ignition, air-fuel ratio, idle speed, exhaust gas recirculation and other parameters of the engine based on the comparison and calculation results. It also has fault self diagnosis and protection functions. When the system malfunctions, it can automatica

lly record fault codes in RAM and use protective measures to read alternative programs from the inherent programs to maintain engine operation, allowing the car to be driven to the repair shop. Under normal circumstances, RAM will also continuously record your driving data, becoming the ECUs learning program to provide the best control state to adapt to your driving habits. This program is also called an adaptive program. But as it is stored in RAM, just like an error code, once the battery is removed and power is lost, all data will be lost. Most contemporary car engines use electronic fuel injection systems, with a control component resembling a square box called "ECU". There are many names for ECU, some call it a computer, some call it a microcomputer, and some call it a microprocessor. So, what is it actually? Simply put, ECU consists of a microcomputer and peripheral circuits. A microcomputer is a unit that integrates a microprocessor (CPU), memory, and input/output interfaces on a single chip. The main part of ECU is the microcomputer, and the core component is the CPU. The ECU converts the input signal into digital form, compares and processes it based on stored reference data, calculates the output value, and then amplifies the output signal to control several regulating servo components, such as relays and switches, through power amplification. Therefore, ECU is actually an "Electronic Control Unit", which consists of three parts: input circuit, microcomputer, and output circuit. The input circuit receives signals from sensors and other devices, filters and amplifies the signals, and then converts them into a certain voltage input level. The signal sent from the sensor to the ECU input circuit includes both anal

Golf 4 air flow meter | What is ECU

1. What does ECU refer to?

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