DMUjunayksiköt

DMUjunayksiköt is a Finnish term referring to multiple-unit train sets. These are rail vehicles made up of two or more permanently or semi-permanently coupled carriages that function as a single train. Unlike locomotive-hauled trains, DMUjunayksiköt have their own propulsion systems distributed throughout the set, often in one or more carriages. This design allows for greater flexibility in train length and passenger capacity.

The propulsion can be diesel, electric, or a combination. Diesel multiple units (DMUs) are powered by diesel engines, making them suitable for routes without electrification. Electric multiple units (EMUs) draw power from overhead lines or a third rail. In Finland, the term DMUjunayksiköt specifically denotes diesel-powered multiple units, differentiating them from sähköjunayksiköt (electric multiple units). These units are widely used for both regional and intercity passenger services due to their efficiency, acceleration, and ease of operation. Their distributed power also leads to better weight distribution and reduced wear on the tracks.