Computer that adjusts electronics in an internal combustion propulsion system
For other uses, see ECU (disambiguation).
Delco ECU used in General Motors vehicles built in 1996
An engine control unit (ECU), also called an engine control module (ECM),[1] is a device which controls multiple systems of an internal combustion engine in a single unit. Systems commonly controlled by an ECU include the fuel injection and ignition systems.
The earliest ECUs (used by aircraft engines in the late 1930s) were mechanical-hydraulic units; however, most 21st-century ECUs function by digital electronics.
^"How an Automotive Computer Works". www.2carpros.com. Retrieved 14 May 2023.
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