For instance, for the A/C control unit, each door or the driver's seat. These are all quite big modules, but ECUs can also be for smaller modules. The ECM can use information such as the current speed and engine temperature to control things like the fuel/air ratio, the idle speed and valve timing. Yes, it has the same acronym, so let's stay with ECM so we are on the same page. The engine control module (ECM), also known as the engine control unit (ECU), is the most common. They have various purposes and have different complexity levels. TypesĪs mentioned, a modern car has a lot of ECUs. The software is stored in the memory, and the processor runs it. In its simplest form, the ECU takes in information, analyses it and works out an outcome.Īs with computers, the software is responsible for analysing the input and calculating the output signal. The output signals include locking the doors or alerting the driver of an object's proximity. The screen and the headphones are examples of output devices.įor the ECU, the input signals can come from buttons and sensors. It can display a letter on the screen or play music in your headphones. The processor in the computer evaluates the signals and determines the output. It receives input signals from devices such as the keyboard and the mouse. Suppose we think of a regular personal computer. Let's start with the Wikipedia description: An electronic control unit (ECU), also known as an electronic control module (ECM), is an embedded system in automotive electronics that controls one or more of the electrical systems or subsystems in a car or other motor vehicle.Īn embedded system is a computer system with a processor, memory and input-output peripheral devices. Finally, we'll review some of the requirements the ECU needs to meet and what the future might hold. ![]() ![]() We'll also illustrate what data flows through it and how it works on a high level. We'll look into examples of types of ECUs in a car. In this article, we will describe an ECU and what it stands for.
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