What is an Electronic Control Unit Composed Of?

[JaxsonLee]

An electronic control unit is primarily composed of an input circuit, analog-to-digital converter (AD converter), microcomputer, and output circuit. Input Circuit: When the engine is operating, signals from various sensors are transmitted to the ECU and first enter the input circuit for processing. The processing method varies depending on the type of sensor input signal. Generally, the input signal is first filtered to remove noise, and sinusoidal waves are converted into rectangular waves before being transformed into input levels. AD Converter: The signals sent by sensors to the ECU can be either digital or analog. Digital signals can be directly input into the microcomputer, but the microcomputer cannot directly accept analog signals. These must first be converted into digital signals by the AD converter before being input into the microcomputer.