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frauscher thermal motors fagatec engines

fagatec® ENGINES

Many years of intensive research and development culminated in a new type of engine, which combines the benefits of the alpha and the gamma type by simultaneously avoiding their disadvantages. The term “fagatec® stands for “Frauscher Alpha Gamma Technology” and depicts a new, pioneering technology that provides the basis for an economical and low-wear design. If we look at the work distribution of pistons in familiar engine types, it is possible to draw the following comparison:


Note: The specifications are indicatory values and are derived both from measured values of manufactured engines and substantiated by isothermal and polytrophic calculation results. Depending on the phase angle, swept volume ratio and temperature ratio, a different distribution of piston work can occur.


alphagamma® technology reduces the work of the expansion piston by approximately half compared to the alpha type and by around 30% in comparison to the beta and gamma type. Both pistons perform positive work. Consequently, piston forces, piston friction, and the bearing load of the piston rod bearings and crankshaft main bearings are reduced. The new technology therefore provides the qualification of placing highest life expectancies on the roller bearings despite lubrication-free operation and achieving particularly high efficiencies due to minimal frictional forces. Our test stand results clearly confirm the high expectations.


There are currently engines with 600 ccm of swept volume and a mechanical shaft output of 8 kW imminently to the first field applications in a sewage gas operation. The engines with the type designation fagatec® 600a (with exterior generator) or fagatec® 600i (with generator in the buffer space of the engine) demonstrate highest performance on our test stands and are ready for external use.

Stirling motor fagatec® G600aStirling motor fagatec® G600aStirling motor protoype fagatec® G600a
Stirling motor fagatec® G600aStirling motor fagatec® G600aStirling motor protoype fagatec® G600a


Our fagatec® engines form the basis for further research and development work. Here, we focus on the power generation from solid biomass as well as on the development of more powerful engines. Improving the power-to-weight ratio is another task that challenges us.

frauscher thermal motors GmbH
A-4774 St. Marienkirchen
Gewerbestraße 7

T: +43 7711 318 20-0
E: are-info-xya34[at]


Our opening hours:

Monday to Thursday: 07:00 - 11:45 und 12:30 - 16.30 Uhr

Friday: 07:00 - 11.45 Uhr






frauscher thermal motors - advanced power generation


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