KEYOU, a clean mobility company leading in hydrogen technologies and Voith recently set up the first prototype for a hydrogen-driven city bus, which will be presented during IAA Transportation 2022.
The 12-meter vehicle, which is based on the chassis of a leading European bus manufacturer, is equipped with a unique combination of “KEYOU-inside hydrogen engine” and Voith DIWA NXT mild-hybrid system. The Bavarian Ministry of Economic Affairs supports the vehicle’s development and construction.
With this step, Voith took a further important step towards its target to play a key role in the global decarbonization of public transport.
The DIWA NXT automatic transmission for buses is designed as a mild-hybrid system. The central recuperation unit (CRU) recovers electrical energy generated from the driving operation. It delivers peak power up to 35kW at 48V. In this very special concept, Voith changed the main functionality of the CRU to mainly support the start-up procedure of the bus.
The combination of hydrogen combustion engine and mild-hybrid system thus creates new zero-emission mobility that can rely on existing infrastructure. The CRU is integrated into the flywheel housing between the engine and transmission and requires almost no additional installation space.