Diesel multiple unit

A diesel multiple unit or DMU is a multiple unit train consisting of multiple carriages powered by one or more on-board diesel engines. They may also be referred to as a railcar or railmotor, depending on country.

Multiple unit trains
Subtypes
Electric multiple unit Diesel multiple unit Push-pull train
Technology
Multiple-unit train control
By Country
Britain (DMU) Britain (EMU) Ireland

DMU, type SA108 of Great Poland Voivodship in Poznań, Poland

The Transwa Prospector DEMU capable of up to 200 km/h provides a passenger service between Perth, Western Australia and the mining town of Kalgoorlie

Transmission

The diesel engine drives the train through a transmission system. The transmission system may be:

• Mechanical, using a gearbox (diesel-mechanical)
• Hydraulic, using a torque converter (diesel-hydraulic)
• Electric, using a generator to power traction motors (diesel-electric)

Related pages

• Electric multiple unit
• Diesel locomotive
• Multiple unit
• Railways
• Multiple units of Ireland