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A wolrd first: Efficient Hydrogen Motors demonstrates the technological reality of its 5-stroke hydrogen engine

Efficient Hydrogen Motors achieves a milestone in its development by operating its 5-stroke engine, an innovation designed for hydrogen and adaptable to other decarbonized fuels. This breakthrough, unique on a global scale, highlights the pivotal role this technology can play in the energy transition.


An ambitious and unmatched technology


For the first time, EHM reveals a video showcasing the operation of its engine. This prototype, tested on a single cylinder without an exhaust system, provides clear evidence of the technology’s viability.


This engine, the result of three years of collaboration with inventors, reflects EHM’s ambition to build a zero-emission future. Designed from the outset to address the complex challenges of decarbonization, it goes far beyond its 5-stroke cycle with multiple patented innovations. Currently in the testing phase, it is progressively integrating hydrogen as its primary fuel. This phased approach to implementing innovations helps overcome technical barriers such as optimizing efficiency, managing auto-ignition, and addressing material challenges like sealing and resistance to hydrogen’s unique properties. Each advancement strengthens the technology's robustness and reliability, aiming for optimal performance with 100% hydrogen.


This innovation process, often underestimated in its complexity, stands out for its ambition to create a wholly new solution rather than incremental improvements to existing technologies. It draws upon multidisciplinary expertise and unparalleled innovation capabilities, demonstrating the dedication and expertise of the EHM team, as well as the valuable support from its partners and investors.


Hydrogen: an essential solution for the energy transition


Hydrogen is a key component of the energy mix required to achieve carbon neutrality. EHM’s 5-stroke engine fits into this dynamic by offering a complementary solution to batteries and fuel cells, targeting specific use cases such as heavy mobility or generators, where energy density and autonomy are priorities.


White hydrogen, sourced naturally, represents a promising and sustainable resource in the energy landscape. Additionally, hydrogen produced via electrolysis, while energy-intensive, holds growing potential thanks to the development of renewable energy, maximizing their use in a decarbonized framework. Hydrogen can also be produced from various sources, such as biomass, or integrated into circular cycles like those of Energy Recovery Units (ERU). These facilities produce hydrogen from waste incineration, which can then power vehicles such as garbage trucks, illustrating a sustainable, circular approach. Furthermore, hydrogen offers large-scale energy storage solutions essential to support intermittent renewable energies.


Hydrogen combustion technology presents concrete advantages: it uses readily available materials, integrates efficiently into existing infrastructure, and reduces indirect emissions related to its deployment while providing an economically viable solution. By working alongside other technologies in a complementary logic, we collectively contribute to the emergence of a robust sector, strengthening energy sovereignty while accelerating the ecological transition.


The next steps


The coming months will focus on optimizing and progressively integrating the engine into practical applications. We aim to achieve ambitious objectives, including maximum efficiency and zero emissions. Initial applications will include generators, followed by scaling up to sectors like trucks and buses. This progress underscores that EHM is not only an innovator but also a committed player in decarbonization and the global energy transition.


Efficient Hydrogen Motors is currently in the process of raising funds to accelerate its development and launch industrial production of the technology.


Châteaulin, Monday, December 16, 2024



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