• engine architecturezero impact on existing engine architecture
  • fully variablefully variable, high speed actuation
  • CO2 reduction8% CO₂ reduction in the WLTC at low cost

Combustion engine development.

Improving efficiency with our fuel saving engine technologies

Stringent CO₂ regulations are pushing the combustion engine into an accelerated evolution phase. Never have changes been so dramatic as those we will see over the next decade.

One of these change is the introduction of Variable Compression Ratio (VCR) technology. Several car manufacturers have already announced to work on a production version of a VCR system and one presented its production engine to the public at the 2016 Paris Motor Show in September.


More on our product

Homepage intro

Gomecsys VCR technology offers many advantages

  • 8% CO₂ reduction in the WLTC at low cost
  • Zero impact on existing engine architecture
  • Fully variable actuation over the complete rpm range
  • High speed actuation (0,2 sec) – with low power consumption
  • True 4-stroke cycle with overexpansion
  • No additional friction
  • No gear noise

Who we are.

Over 20 years of experience

Gomecsys was founded in 1997. From the first hour, our goal has been to develop fuel saving engine technology. We started with the development of a new type of rotary engine. 

Our experience in engine design makes it possible to realize a custom VCR crankshaft design for any engine, from a 1 cylinder engine to a V8 within one month.


Who we are
Our VCR demo car, a Peugeot 208 GTi


Working together to make a change

Mitec PSA Groupe

EUThis project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 782767.


We use cookies to ensure that we give you the best experience on our website. By your continued use of this website you accept such use.

Continue More information