What does ECU mean in cars?

1 Answers
TeaganMarie
07/29/25 7:58pm
ECU in cars stands for Engine Control Unit. The ECU control unit makes adjustments to the vehicle's operating system by comprehensively analyzing driving data such as vehicle speed, engine RPM, transmission gear position, etc. Introduction to ECU: ECU is known as the brain of the engine. During engine operation, the ECU collects data, processes it, and then controls the engine's operation through control mechanisms. Engine sensors transmit data to the ECU. After processing, the ECU adjusts the engine's operating state through actuators. The ECU is generally installed in the engine compartment. Function of ECU: The purpose of the electronic control unit is to compute, process, and judge the information input from the air flow meter and various sensors based on the programs and data stored in its memory, then output commands to provide the fuel injector with electrical pulse signals of a certain width to control the fuel injection volume. The electronic control unit consists of a microcomputer, input, output, and control circuits. Capabilities of ECU: ECUs generally have self-diagnosis and protection functions. When a fault occurs in the system, it can automatically record the fault code in RAM and take protective measures to read substitute programs from the aforementioned inherent programs to keep the engine running. At the same time, these fault messages will be displayed on the dashboard and remain illuminated, allowing the owner to promptly identify the issue and drive the car to the repair shop.
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