A diesel multiple unit or DMU is a multiple-unit train powered by on-board diesel engines. A DMU requires no separate locomotive, as the engines are incorporated into one or more of the carriages. Diesel-powered single-unit railcars are also generally classed as DMUs. Diesel-powered units may be further classified by their transmission type: diesel–mechanical DMMU, diesel–hydraulic DHMU, or diesel–electric DEMU.
A locomotive or engine is a rail transport vehicle that provides the motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, motor coach, railcar or power car; the use of these self-propelled vehicles is increasingly common for passenger trains, but rare for freight.
The Siemens Desiro is a family of diesel or electric multiple unit passenger trains developed by Siemens Mobility, a division of the German Siemens AG conglomerate. The main variants are the Desiro Classic, Desiro ML, Desiro UK and the later Desiro City, Desiro HC and Desiro RUS. The trains are mostly used for commuter and regional services, and their rapid acceleration makes them suitable for services with short distances between stations. The design is flexible, and has become common in many European countries.
Multiple-unit train control, sometimes abbreviated to multiple-unit or MU, is a method of simultaneously controlling all the traction equipment in a train from a single location—whether it is a multiple unit comprising a number of self-powered passenger cars or a set of locomotives—with only a control signal transmitted to each unit. This contrasts with arrangements where electric motors in different units are connected directly to the power supply switched by a single control mechanism, thus requiring the full traction power to be transmitted through the train.
The British Rail Class 103 diesel multiple units were built by Park Royal Vehicles with diesel engines by British United Traction (BUT). Ordered in the first half of 1955, 20 of these sets were built by Park Royal at the Crossley Motors works in Stockport of the ACV Group. They consisted of a power car and a driving trailer. Standard BUT equipment was fitted, with 'A' type engines.
Stadler Rail is a Swiss manufacturer of railway rolling stock, with an emphasis on regional train multiple units and trams. It is also focused on niche products, such as being one of the last European manufacturers of rack railway rolling stock. Stadler Rail is headquartered in Bussnang, Switzerland.
Class 624 and class 634 are types of diesel multiple unit, originally operated by Deutsche Bahn.
The Alstom Coradia Juniper series is a family of electric multiple unit trains built by Alstom Transport Birmingham for use on the railway network in Great Britain. The family is related to the Coradia 1000 series of diesel multiple unit.
NSB Class 86 is a class of diesel-hydraulic multiple units built by Strømmens Værksted for the Norwegian State Railways (NSB). Thirty-eight motor cars and thirty-one trailers were built between 1937 and 1954, split between six subtypes designated a through f. Class 91 was a further delivery of ten units that had a more comfortable interior and designed for regional trains. The trains had good acceleration and a maximum speed of 100 kilometres per hour (62 mph), which made them suitable for most unelectrified lines in Norway. As most of the network gradually became electrified, the class became increasingly used on branch lines.
TCDD MT5300 was a series of diesel multiple units operated by the Turkish State Railways. The trains were used on intercity services, and offered higher speeds and comfort than steam powered trains. There had many similarities to the MT5200. The motor units were built by MAN, Esslingen and Duewag with MAN Diesel engines, while the centre cars were built by Westwaggon.
TCDD MT5500 was a series of diesel multiple units operated by the Turkish State Railways. The trains were used on intercity services, and offered higher speeds and comfort than steam powered trains. The DMUs were built in Italy by Fiat, and a total of 11 units were delivered in 1960-61.
Bombardier Itino is a diesel multiple unit manufactured by Bombardier Transportation, originally developed by Adtranz. It has two or three cars and is capable of 140–160 km/h (87–99 mph). 40 units have been built and 17 more are on order. It is in service in Germany and Sweden.
Stadler FLIRT is a passenger multiple unit trainset made by Stadler Rail of Switzerland. The baseline design of FLIRT is an electric multiple unit articulated trainset that can come in units of two to twelve cars with two to six motorized axles. The maximum speed is 200 km/h (120 mph). Standard floor height is 57 cm (22.4 in), but 78 cm (30.7 in) high floors are also available for platform heights of 76 cm (29.9 in).
The family of Walker railmotors were a type of diesel railcar operated by the Victorian Railways in Australia.
The Uerdingen railbus is the common term for the multiple units which were developed by the German firm of Waggonfabrik Uerdingen for the Deutsche Bundesbahn and private railways after the Second World War. These vehicles were diesel-powered, twin-axle railbuses of light construction. The diesel motors were built into the chassis underneath the vehicle. The VT 95 and VT 98 of the former Deutsche Bundesbahn in particular, are associated with this concept. These vehicles were employed in passenger train duties on branch lines where steam or diesel train operations were less profitable. Including the units built under licence, a total of 1,492 power cars were built from 1950 to 1971; and the total number of units, including trailer and driving cars, was 3,306.
The CAF Civity is a platform of regional passenger trains which is manufactured by Spanish rolling stock manufacturer CAF. Available as both a diesel and electric multiple unit, the Civity was first launched in 2010 and received its first order two years later.
An electro-diesel multiple unit (EDMU) or bi-mode multiple unit (BMU) is a form of passenger rail car, with permanently or semi-permanently coupled carriages, that can be powered either by an external electricity supply or by using an onboard diesel engine.
The British Rail Class 769 Flex is a type of bi or tri-mode multiple unit (BMU/TMU) which is currently being converted by Brush Traction. The train is a conversion of the existing Class 319 electric multiple unit (EMU), a conventional unit type which had become surplus to requirements during the 2010s.
The Uşak Express, numbered B37, is a 168 km (104 mi) long regional passenger train operated by the Turkish State Railways, running from Basmane Terminal in İzmir to the town of Uşak. The train operates daily in each direction. Schedulled journey time is 5 hours and 35 minutes.
The British Rail Class 196 Civity is a class of diesel multiple unit being constructed for West Midlands Trains by Spanish rolling stock manufacturer CAF. A total of 26 units are to be built; twelve two-car units and fourteen four-car units.