Diesel locomotive
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A diesel locomotive is a teep o railwey locomotive in which the prime mover is a diesel ingine. Several teeps o diesel locomotive hae been developit, differing mainly bi transmission teep, i.e. the means bi which mechanical power is conveyed tae the drivin wheels.
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Transmission teeps eedit
Mechanical eedit
A diesel-mechanical locomotive uses a mechanical transmission in a fashion seemilar tae that employed in maist road vehicles. This teep o transmission is generally leemitit tae law-powered, law speed shunting locomotives, lightweight multiple units an self-propelled railcars.
Hydraulic eedit
Diesel-hydraulic locomotives uise ane or mair torque converters, in combination wi gears, wi a mechanical feenal drive tae convey the power frae the diesel ingine tae the wheels.
Electric eedit
In a diesel-electric locomotive, the diesel ingine drives an electric generator the output o which provides power tae traction motors that drive the locomotive. Thare is no mechanical connection atween the diesel ingine an the wheels.