Range Extender

Welcome to our Range Extender section! Here, you’ll find a wealth of information and resources dedicated to the latest advancements and applications of range extender technology. Our range extender is engineered to enhance the efficiency and longevity of electric vehicles (EVs) by providing additional power when needed, ensuring you can travel further without worrying about battery depletion.

What We Cover:

  • Technology & Innovation: Discover the cutting-edge technology behind our zero-vibration, low-profile motor-generator, perfect for installation in car chassis or aircraft fuselage. Learn about the prototype, vibration simulations, and the gathered patents that drive our innovations.
  • Applications & Studies: Explore detailed application studies and the extensive benefits of integrating range extender into hybrid EVs. Understand how range extender can replace traditional internal combustion engines (ICE), leading to more sustainable transportation solutions.
  • Assembly & Testing: Follow the journey of assembling and testing our range extender, including the first start, crankshaft balancing, and the finalization of test frames. Gain insights into the meticulous process of preparing and finalizing engine parts to achieve optimal performance.
  • Galleries & Visuals: Browse our galleries to see the range extender in action. Visual documentation illustrates the development process, from initial concepts to fully functional units ready for deployment.

Our goal is to provide you with comprehensive knowledge and updates on the range extender technology that is redefining the future of transportation. Whether you are an industry professional, an EV enthusiast, or simply curious about sustainable innovations, this category offers valuable insights and practical information.

Explore our posts to stay informed about the latest advancements and applications of range extender technology. Join us in driving the future of efficient and eco-friendly transportation.

Knobgear aero-expo 25

AERO Friedrichshafen 2025

Blog Birotary Engine Range Extender

We’re thrilled to have been part of AERO Friedrichshafen 2025! We were honored to exhibit at AERO 2025 in Friedrichshafen and truly grateful for the incredible interest and positive feedback we received. The enthusiasm for our Range Extender and Birotary Engine technology exceeded our expectations and reaffirms the direction we’re heading. We were also excited […]

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Vaclav Knob GoodWill

Vaclav Knob – The Innovator Behind Vibration-Free Engine Technology

Birotary Engine Range Extender

In a candid interview, Václav Knob, a renowned engineer and inventor, shares insights into his groundbreaking work in engine technology and his journey as a pioneer in the automotive industry. With over 25 years of experience, Knob has not only pushed the boundaries of what’s possible in vehicle technology but has also left an indelible

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Innovation in Range Extenders

Czech Innovation in Range Extenders – A Vibration-Free Experience

RE - Prototype Range Extender

The automotive world is abuzz with the latest innovation in range extenders, and this time, it’s coming from the heart of Europe – the Czech Republic. Featured in a recent article on Auto.cz, this breakthrough in automotive technology promises to revolutionize how we think about extending the range of electric vehicles without the usual drawbacks. The

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Project Range Extender: Another Step in Hybrid Technology

Range Extender

In the last few decades, the automotive industry has undergone a significant shift in the quest to achieve more eco-friendly and energy-efficient propulsion. The concept of hybrid drives has become a key topic. While vehicle electrification offers a cleaner alternative, especially in densely populated areas, internal combustion engines still hold their place in the market

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Assembling and First Start of the Range Extender

Range Extender RE - Prototype

We are excited to share that we have reached another significant milestone in our journey— the completion and first start of our Range Extender! In this phase, we meticulously assembled each component of the Range Extender, ensuring precision and adherence to our high standards of quality. The process was both challenging and rewarding, marking the culmination of months of hard work and innovation.

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Range Extender Crankshaft Balancing

Blog Range Extender RE - Prototype

As mentioned in the article “Technology,” one of the primary sources of vibrations in an engine comes from moving components. In our range extender design, the crankshaft balancing procedure is different from the common engine. The individual crank mechanisms are meticulously balanced to ensure that unbalanced rotary masses are counterbalanced 100%. While the sliding masses

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Range Extender Camshaft Balancing

Blog Range Extender RE - Prototype

We are excited to share that we have successfully completed balancing procedure for our range extender. However, it’s important to note that we encountered some challenges, and the process wasn’t entirely seamless. The camshaft posed a significant balancing challenge due to its small size, lightweight, and inherent imbalance. Initially, we attempted static balancing, similar to

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