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Ok I'm going to split hairs. A motor is any device that converts any type of energy into mechanical energy. Engine is the name of a particular kind of motor.
Steam engines don't use internal combustion. Yet they are engines. The definition of a motor is not something that uses electricity only to make power and or do work. An engine is defined as a type of motor that converts any form of energy into mechanical energy. The word motor covers all devices that do this. The word engine is just specifying which kind of motor.
All internal combustion engines convert a form of energy into mechanical energy and do work. This means they require energy to do what they do just like an electric motor requires the electrical energy to do work. Internal combustion engines require the external power source of the fuel they burn to create mechanical energy.
not having any kind of college physics\chemistry It looks to me that the difference twixt motor and engine is in the change of state that the fuel has to go thru for an engine which results in 2 separate forms of energy being produced....(1)Heat or the inefficient part...and(2) mechanical motion..the Efficient part. A Motor (electric) simply takes the electrons and thru the process of electomagnetic induction converts them into mechanical energy. There is a generation of some heat but i thimk that is associated with the resistance of the wire...it is obviously the inefficient part of the process. My definition of efficiency is power consumed vs power produced...or EER , energy efficiency ratio. I wish T1 would weigh in on this as this is his area of expertise......fd
In engineering terms - a "MOTOR" is an Electromechanical Device (IE: "Utilising Electromotive Force"), whereas an "Engine" derives it's power from chemical means.
Additionally - This is why the MORTARS of long ago wars were referred to as "Siege Engines"
(Also catapults which used explosives, or burning incendiary loads)
For additional information - use your favorite search engine(?) to find references to:
"PUNKIN' Chunkin' "!!!
Last edited by Greywolf; May 20, 2003 at 07:44 PM.
Actually, as in the dictionary or any other reliable source, an engine is a motor, but a motor is not nescessarily an engine, yet it does not go into it much further into it. It does say thatan engine turns energy into mechanical motion. a Motor is by definition something that generates or imparts motion: a device that changes eletrical energy to mechanical energy; or a device that produces mechanical power from fuel
This is a quote from the article that Freight Train posted.
In everyday, non-technical usage the words have much the same meaning. But they have such clearly defined and fixed compounds (except in the rocket case) that they can’t be thought of as entirely interchangeable. The magazine article argues that the difference is that engines contain their own fuel or are part of a highly integrated engine-fuel system, whereas a motor draws on externally supplied energy. That’s the rule given in the Oxford English Dictionary, but on reflection it seems not wholly satisfactory. It doesn’t work for outboard motor or rocket motor for example. And it doesn’t explain why the two words should have been applied in this way.
It basically supports my interpretation (and that of the majority of posts here) of the general meaning of two words. Of course, as with anything, there are exceptions to the rule.
IMHO, the key is that an engine converts the fuel to energy, where as a motor uses supplied energy.
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