Why choose us for your project?
REVYVE's hydrogen engine expertise is now carried forward by Felsaris GmbH, a specialized German engineering company led by REVYVE co-founder and technology lead David Leimann. Felsaris provides hydrogen combustion engine development (H2ICE), 1D engine simulation, 3D-CFD, combustion and injection analysis, turbocharging and thermal management, alongside CAE-based product development.
How we work
Engineering Expertise Powered by Felsaris
REVYVE's hydrogen engine development expertise is carried forward by Felsaris GmbH, a specialized German engineering company led by REVYVE's former CTO and principal technical expert, David Leimann. Felsaris provides engineering expertise in hydrogen internal combustion engines (H2ICE), combustion development, 1D engine simulation and 3D computational fluid dynamics (CFD). This includes fuel injection, mixture formation, combustion optimization, turbocharging, thermal management and engine system integration.
H2ICE-specific tool-chain for quick & precise results.
Over years of scientific work, we developed our patented tool-chain to convert your fossil base engine to Hydrogen both quickly and precisely. Through extensive use of simulation software programs and collabo-ration with developers, we've gained deep insights into each tool's capabilities. This knowledge empowers us to navigate H2ICE development with confidence, optimizing every step of the process. Trust in our expertise to deliver seamless conversions and propel you towards a cleaner future.
High quality standards and cost savings with lean project management
Perfectionism is crucial to deliver the best results. Simultaneously, we only recommend practical steps to maintain the lean efficiency of your H2ICE project. With our toolchain facilitating rapid progress through development stages, we enable early feedback cycles to enhance your overall objectives. These additional feedback cycles assist in saving both time and money by choosing the right hardware on the test bench, such as turbochargers and injectors.
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Our services
We know the capabilities and limitations of H2 combustion. Aligned with your goals, we recommend you early on the best path to achieve them. Let’s kick-start your H2ICE project.
About Felsaris GmbH
Felsaris GmbH is a German engineering consultancy specializing in innovative product development, computer-aided engineering (CAE) and advanced 3D-CFD simulation. The company supports customers in the automotive, motorsport, energy and industrial sectors, from early concepts and CAD design to simulation-driven development and prototype validation.
Its engineering portfolio covers 3D-CFD simulations for fluid flow, combustion, heat transfer and aerodynamics; 1D engine and system simulation with GT-SUITE and GT-POWER; hydrogen and conventional combustion engine development; engineering for low-volume vehicles; thermal management and cooling systems; and data mining, design of experiments (DoE), regression and surrogate models, including automated analysis of test data. Felsaris also advises on German R&D funding programmes, including the Research Allowance and ZIM.
Tools we work with
How we'd work together
Strategy Call - 30 min
We listen closely to what you want to achieve with your project. After the call, you'll receive a list of requirements and information, that we need to start the project and to best fulfil your goals.
Project Planning
Based on your provided information, we show you the relevant work packages and estimated project duration. In this meeting, we already provide our suggestions to best fulfil your goals and prevent useless time-consuming investigations.
1D Simulation
With the 1D Full Engine Simulation we set up the injection-strategies, do the turbo-matching and benchmark the achievable levels of BMEP, power, efficiency, air-fuel-ratio and NOx. This phase usually takes 2 to 3 months.
3D-CFD Simulation
The 3rd phase starts with a timely offset of several weeks to the 1D simulation, as it needs the boundary conditions from the 1D. This phase can take up to 4 months.
Test Bench Phase
In this phase, the H2ICE will be build-up the first time with an already advanced hardware setup due to the sophisticated pre-development with simulations. This phase usually takes 3 to 7 months.
Final Report
You'll receive a holistic report with all findings and outcomes of the project as a documentation. The report also highlights future development potential to achieve the next step to stay ahead of the competition.