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The experimental results in combination with FEV’s well proven knowledge of charge-motion generation enables the company to optimize the interaction of fuel injection and charge-motion design to secure best possible mixture homogeneity. Thus, we gathered an unparalleled understanding of the injection and mixing process of hydrogen with other gases.” To address the unique behavior of hydrogen during the injection and mixing process, a wide field of optical investigations in pressurized injection chambers were performed in collaboration with RWTH Aachen University. “At FEV, we are using our well proven 3D CFD (charge-motion design) process.
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“It’s imperative to secure an optimal mixture homogeneity, which ultimately results in low NOx emission levels in combination with highest engine efficiency,” said Pischinger. “This knowledge has already been successfully transferred to ongoing customer projects, regardless of the injection system – port fuel or direct hydrogen injection.”īesides fuel supply of hydrogen via rail, the admission through the injectors as well as the mixing process with intake air needs deep understanding of the fluid dynamics and interactions.
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“FEV has gained deep know-how in terms of the design of pressure-oscillation-free fuel-rails utilizing our multi-cylinder research engine,” said Pischinger. To comply with existing safety requirements and due to the need of a secure, constant pressure upstream to the injector, hydrogen creates a unique demand for the design of fuel rails feeding the engine. “Nevertheless, due to its specific chemical properties like wide flammability limits and short ignition delay, hydrogen creates some challenges for the development of internal combustion engines, which FEV is successfully tackling.” It can be implemented into the current production infrastructure relatively simply and offers potential for existing vehicles, said Professor Stefan Pischinger, President and CEO, FEV Group. “The hydrogen internal combustion engine is a robust, cost-efficient option for zero CO2 transport. The global major says it has successfully designed a low-emission, efficient hydrogen IC engine. There’s plenty of global engineering activity happening on the hydrogen internal combustion engine front.