Diesel locomotive

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.

Andrew Barclay diesel locomotive at Polmadie depot
Diesel locomotive in Nairobi (Kenyae)

Transmission teepsEedit


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.


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.


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.