Authors

S. Bareiss, C. Zimmermann, M. Krüger, A. Kufferath, D. Naber, G. Cornetti, H. Kauss, T. Schnekenburger, A. Celic, Robert Bosch GmbH, Stuttgart

Year

2026

Print Info

Production/Publication ÖVK

Summary

With the imperative of rapidly reducing greenhouse gas emissions, the use of alternatives to fossil fuel-powered diesel engines in commercial vehicles seems to be essential. To accelerate this transformation efficiently, a broad portfolio of CO₂ reducing energy sources and powertrain technologies is being considered.
While battery-electric drives offer a very good alternative for many applications, there are challenges, especially for heavy commercial vehicles, such as range, charging infrastructure, and payload compromises. Therefore, also alternative liquid fuels and hydrogen will be necessary in the future to balance environmental, social and economic needs.

Robert Bosch GmbH is strongly committed along the entire hydrogen ecosystem and follows a clear product strategy from production, infrastructure and usage of hydrogen. Within the entire ecosystem the hydrogen engine is positioned as a complementary pillar for decarbonization. A wide-ranging program for developing components, combustion processes and operating strategies was started years ago. The publication addresses the potential of very low criteria emissions for both the port fuel (PFI) and the direct injection (DI) system. A comprehensive comparison is conducted on the same commercial vehicle base engine with dedicated system optimization for PFI and DI hydrogen injection respectively. Hereby the interaction of emissions, transient response and overall operating strategy is considered.

ISBN

978-3-9504969-5-6

DOI

https://doi.org/10.62626/iazr-3pek Copy link

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