Weitzer railmotor
The railmotors of J. Weitzer Engine- & Waggon-Building & Iron Casting Joint-stock Company (Hu.: Weitzer János Gép,- Waggongyár és Vasöntöde Részvénytársaság) were Europe's first self-propelled railcars with internal combustion engine built in considerable numbers. The principle of their petrol–electric transmission and the four-cylinder petrol engines came from De Dion-Bouton in France.