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Automotive glossary: What is an Engine Control Unit or Engine Management System? (Abbr.: ECU)

Definition of Engine Control Unit: A complete and fast computer, which controls the ignition and the electronic injection, as well as other engine functions, depending on the specific vehicle. For this end, it is supplied with certain operational conditions by various sensors, which then influence the computation of the necessary adjustments for the optimal engine function. The engine control unit is for example supplied with information about the number of revolutions, the sucked in air mass, the engine temperature on various points, the throttle valve position and other conditions.

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