Rotary valve - hofmann-dsm

What is a rotary valve train?

The rotary valve train substitudes the complete conventionel valve train (poppet valves, cam shafts etc.) includung the cylinder head
The rotary valve rotates contineously driven by the crankshaft
scavenging areas inside the rotary valve enable the gaslfow to the combustion chamber according the desired control time
The rotary valve is sealed to the combustion chamber by a patented low friction sealing that is dry lubticated without oil
The rotary valve train is applicable for air- and liquid cooled engines

Advantages of the rotary valve train

compared with poppet valve trains

Less package (20-50%) and less weight (20-60%) of the cylinder head
No speed limit of the valve train
Scavenging areas are equal or superior to those of modern four valve cylinder heads
Reduction of mechanical friction losses
Free of maintanance
High compression ratios similiar to Diesel engines without knocking are realizable and enable a significant reduction of fuel consumption and a high compatibility of exhaust gas reduction (EGR)
Less production costs by a lower number of components and easy assembling
Reduced noise emmision of the cylinder head due to missing oscillating poppet valves
Suitability for twostroke and fourstroke engines
Suitability for various types of fuel and systems of carburation
Suitability for various types of engines like motorcycle, passenger car, range extender, stationary engines, etc.

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