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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 ...
An ECU from a Geo Storm. 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 . Modern vehicles have many ECUs, and these can include some or all of the following ...
The ology ending is a combination of the letter o plus logy in which the letter o is used as an interconsonantal letter which, for phonological reasons, precedes the morpheme suffix logy. Logy is a suffix in the English language, used with words originally adapted from Ancient Greek ending in -λογία (-logia).
The acute accent (sometimes called accento chiuso, "closed accent" in Italian) is compulsory only in words of more than one syllable stressed on their final vowel (and a few other words). Words ending in stressed -o are never marked with an acute accent ( ó ), but with a grave accent ( ò ).
Also gas pedal. A throttle in the form of a foot-operated pedal, or sometimes a hand-operated lever or paddle, by which the flow of fuel to the engine (and thereby the engine speed) is controlled, with depression of the pedal causing the vehicle to accelerate. admission stroke See induction stroke. aftermarket air brake 1. A type of brake in which the force that actuates the brake mechanism is ...
An electronically controlled unit injector ( EUI) is a unit injector (UI) with electronic control. It performs the same function as a conventional unit injector in an internal combustion engine, such as in an on-road or off-road vehicle or a diesel-electric locomotive. The pressurized delivery of fuel is camshaft -driven, but the timing of the ...
ecu A large French silver coin made during the end of the monarchy. Also a proposed European currency unit. effigy The image or likeness of a person, usually depicted on the obverse of a coin or medal. electrotype A reproduction made by electrodeposition, frequently used in museum displays. electrum. Also abbreviated EL
In words of this type, the "-logy" element is derived from the Greek noun λόγος (logos, 'speech', 'account', 'story'). The suffix has the sense of "[a certain kind of] speaking or writing". Philology is an exception: while its meaning is closer to the first sense, the etymology of the word is similar to the second sense.