HTM H2 Rotary Engine - Compact, powerful & cost-efficient

The HTM H2 Rotary Engine is the centerpiece of all HTM products and has been specially developed to fully exploit the advantages of hydrogen as the fuel of the future. With its high power density and zero-impact emissions, it enables use in hybrid drives as well as in previously unattainable fields of application that were previously reserved for diesel drives.

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Properties 
Hydrogen

Low vol.
Energy density

High
diffusivity

Wide
Ignition limits

High flame
speed

Low ignition energy, high pre-ignition tendency

Conventional 4-stroke operating principle

Double the number of working cycles per revolution

CO2-neutral operation

H2 direct injection with medium pressure injectors

Low tendency to irregular combustion due to smooth chamber shape

Motor operation independent of external conditions

Engine operation possible with different hydrogen qualities

Cost-efficient production due to few moving parts

Strong development partner

"The future of mobility undoubtedly lies in sustainable drive concepts, and hydrogen plays a central role in this."

Institute for Internal Combustion Engines and Vehicle Drives (VKM)
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Data sheet
HTM-Engine

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