Hydrogen Combustion Engine – High Performance, No Emissions

Authors

Dipl.-Ing. V. Bevilacqua, A. Gallo MSc, Dipl.-Ing. M. Böger, Porsche Engineering Services GmbH, Bietigheim-Bissingen:

Year

2022

Print Info

Production/Publication ÖVK

Summary

To further reduce greenhouse gas emissions from  the transport sector, Porsche and Porsche Engineering are successively developing hybrid systems and all-electric drive systems as part of a triad alongside clean and efficient combustion engines. As an alternative to conventional and synthetic fuels generated with renewable energy sources, hydrogen can also be considered for use on combustion engines. To assess the potential of hydrogen combustion engines for high-performance applications as well, Porsche Engineering has resolved to develop a hydrogen combustion engine concept. The objective was to find out a combination of technologies with power and torque comparable to current high-performance gasoline engines combined with a high degree of efficiency and emissions values at ambient air level (“zero emissions”). Based on an engineered 4.4-liter eight- cylinder gasoline engine with bi-turbo charging, direct injection, and variable, cylinder- individual cam timing at the intake and exhaust, Porsche Engineering has developed a hydrogen engine concept with an innovative e-turbocharger with a back-to-back compressor arrangement and charge-air intercooling. Due to particularly lean and thus colder combustion, the NO_x raw emission level ("engine out") is at ambient air level over the entire speed/load range. Without further exhaust gas aftertreatment, the engine thus meets the WLTP specifications and significantly undercuts the expected limits of the future Euro VII standard. At the same time, it offers very low fuel consumption, and its high engine power output enables driving dynamics in line with today’s high-performance gasoline engines. In terms of the air quality index, which is a measure of the level of pollutants in the air, the hydrogen engine meets the specifications of the best category. In effect, it therefore has no impact on the concentration of pollutants in the air.

ISBN

1920-2323-23-1

Number of pages

16 Order