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Home Home - Europe
Green Hydrogen H2 News

Liebherr makes H2 injection as a drive solution for heavy-duty engines

Arnes BiogradlijaBy Arnes Biogradlija08/11/20213 Mins Read
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Liebherr-Components has been developing environmentally friendly injection solutions for large engines with cylinder capacities ranging from 6 to 16 liters and power outputs ranging from 200 to 450 kW.

Low-Pressure Direct Injection is the focus of research and development in the injection systems product area (LPDI). “The varied combustion processes and the behavior of hydrogen as a medium are the major problems,” says Richard Pirkl, technical director of Liebherr-Components Deggendorf. “The H2 injector’s design should provide a consistent, accurate, and leak-free injection.” “Our specialists in Deggendorf lay a special emphasis on maximal hydrogen density to achieve this,” Pirkl explains. H2 leakage is maintained to a minimum thanks to a two-valve design. The LPDI injector can handle system pressures up to 60 bar, depending on the setup. Typical applications include pressures of up to 30 bar. In terms of injection speed and tiny quantities, the first test results suggest encouraging injector behavior. It may be used for a variety of purposes.

Customer-specific screw inserts can be linked to the hydrogen connection using the present prototypes. They’re designed to work with the most popular connection types and provide the most engine development options imaginable. The blower cap also allows for more flexibility in operating. It’s simple to swap out, and the asymmetric shape provides for a unique injection angle in the combustion chamber. This allows for integration with a variety of engines with a variety of installation scenarios. Liebherr’s LPDI hydrogen injector enables a broad range of customer-specific needs and modular installation thanks to its versatile design. It can be placed in the center, on the side, or at various angles.

Many engine manufacturers are preferring fully integrated H2 injection systems over a single-component solution as a result of discussions with OEMs and current market trends. With its common rail diesel fuel solutions, the Liebherr injection systems team is taking this approach, and will continue to do so with alternative fuels. The firm concentrates on the dimensioning and design of a fully integrated H2 injection system, including system pressure management, in this way. Customers will continue to benefit from the advantages of an integrated solution as a result of this. In addition to the injector, Deggendorf experts are now creating and integrating additional system components.

The goal of Liebherr’s hydrogen injection technology is to guarantee that the gas injection system’s (GIS) compatibility satisfies the engine’s temporary needs. To manage pressure and flow, this system incorporates various components. It does this by emulating the operating characteristics of a diesel engine while preserving a strong system architecture.

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