H2trans - Zero Impact Emissions in Transient Operation of H2 Engines for Light Commercial Vehicles

Combustion engines that run on hydrogen (H2-ICE) are one way of realizing a CO2-free energy economy. Especially as vehicle drives, they are inexpensive and robust, offer a long range and short refuelling times. This project is based on the vehicle class of light commercial vehicles, for which the consortium expects high technical and economic potential for the H2-ICE. A disadvantage of H2 ICE is that nitrogen oxides (NOx) are emitted. In the H2EA project, it was demonstrated that nitrogen oxides primarily occur during transient load changes, which can be explained by the response time of the charging system. The content of the H2EAtrans project therefore focuses on the area of charging and, above all, the transient response behavior of the charging system. For this purpose, the conventional turbocharger is to be analyzed and optimized, but also an electric auxiliary compressor is to be fundamentally examined. In addition to the topic of supercharging, the possibility of phlegmatization, i.e. the equalization of the transient engine load demand through a hybrid drive train, is to be examined. It is then a full hybrid, while the electric auxiliary compressor belongs to the mild hybrid range - here with 48 V voltage. The project is based roughly equally on the test bench and simulation, being strongly linked in order to generate the most reliable results possible, with both charging and phlegmatization. The experimental setup is largely taken over by the H2EA project.