Unimog hydrogen prototype with hydrogen combustion engine / fuel cell
The development of the test vehicle with a hydrogen combustion engine is taking place within the framework of the publicly funded “WaVe” project[1]. The project, funded by Germany's Federal Ministry for Economic Affairs and Climate Protection, is being jointly implemented by 18 partners from industry and science and started in July 2021. The objective of the WaVe project is to examine the extent to which a conventional diesel engine as a multi-energy distributor for the traction drive and all power take-offs can be substituted by a hydrogen-powered combustion engine.

Daimler Truck’s focus is on battery-electric drives and hydrogen-powered fuel cells. In addition to these two technologies, hydrogen combustion can be another option for the decarbonization of Daimler Truck's drivetrain portfolio. Also, initial results from the WaVe project show that the hydrogen combustion engine can be a sensible, complementary solution for special applications.

Especially for the Unimog, this variant could prove to be a viable mode of propulsion for the future because of the limited installation space and the high performance required for operation involved with this type of vehicle. After the first successful practical application, the development team is looking forward to a remaining project duration of six months to make further adjustments and refinements. Dr. Günter Pitz, Head of Powertrain Development at Mercedes-Benz Special Trucks: “The hydrogen combustion drive concept can serve as a blueprint for power-intensive applications in the specialty vehicle sector. Hydrogen combustion can make it possible to drive and work with very low emissions on construction sites, in municipal or agricultural sectors. To reach series maturity for such vehicles, reliable funding is and will be required.”

Source: mercedes trucks

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