Technology

Varionova develops next-generation transmission systems that can change the architectural paradigm of many machines, making them more efficient and practical. Our flagship technology is the RatioZero transmission, the first commercially viable gear-based CVT.

"Split Rotation" Systems

The RatioZero, our first and most famous product, is a revolutionary gear-based CVT combining range, efficiency and ease of control. We have developed several versions of the same concept, tailored for different applications.

Operating Principle

Understanding how split rotation technology enables continuous variable transmission

There are two separate aspects to understand in the RatioZero. The first is how the rotation is split and reconstructed by the four-bar mechanism, and the second is how the ratio is changed by acting on the geometry. The combination of the two enables true continuous variable transmission with gear-like efficiency.

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RatioZero Gen.1

RatioZero Gen.1

Our breakthrough continuously variable transmission technology, delivering unprecedented control and efficiency in compact packages. All variants with internal chain or rods can be constant velocity and can reach ratio = 0, but work best at slightly higher ratios. Best suitable for low to medium speeds applications, from micromobility to industrial applications.

Gear-like efficiency
Continuous ratio control
Low to medium torque, high range
Constant velocity system, low to medium speeds
Patent summary Contact us for details

Performance Highlights

Features and technical specifications that set new standards in transmission technology

90%+
Peak Efficiency (tbc)

Record-breaking efficiency for a CVT, achieved across the entire operating range

0:1 to 5:1
Ratio Range

Wide ratio coverage (on par with a cassette-type or gearbox transmission)

<45dB
Noise Level (tbc)

Enclosed transmission, clean and quiet operation for all environments

2x
Easy integration

Compact & modular form factor, 1 to 4 satellites, low power actuation

Sample Applications

The RatioZero /Chain adapts to diverse mechanical challenges

E-bike application
E-bike detail
CVT for e-bike

Integrated in the rear wheel or central hub, provides a new pedalling experience improving efficiency and range.

Mobility Hub Motors Automation
ATV transmission
Baja racing
ATV transmission

Helping SAE Baja teams achieve better performance: more efficient than conventional belt and pulley CVT.

Racing Driveline Innovation
RatioZero Gen.2

RatioZero Gen.2

The second generation of our breakthrough CVT leverages on the same "split rotation" principle in a completely different way, improving the ability to deal with high torques and to seamlessly reach ratio = 0. Designed in different versions with different features, it is the best choice for high-speed, high-torque applications, from tractors to robotics.

Effectively reaching ratio = 0
Continuous ratio control
High range in a compact package
Heavy-duty system, medium to high speeds
Patent summary Contact us for details

Performance Highlights

Features and technical specifications that set new standards in transmission technology

90%+
Peak Efficiency (tbc)

Record-breaking efficiency for a CVT, achieved across the entire operating range

0:1 to 5:1
Ratio Range

Wide ratio coverage (on par with a classical gearbox or CVT transmission)

Ratio = 0
Clutchless Operation

Can effectively and indefinitely work at ratios equal or near to 0, allowing to remove the clutch

N-fold
Matchless Versatility

Can be used in a variety of applications, from robotic clamps to active differentials

Sample Applications

High-efficiency CVT applications across multiple sectors

Robotics
Robot arm
Robotics

Compact, efficient assembly enables continuous ratio control with near-zero backlash for precision motion control.

Robotics Automation Precision
Tractors
Tractor PTO
Tractors

High torque, high reliability applications from driveline to Power Take Off - the tractor sector is a prominent use case.

Heavy-Duty PTO Cost reduction

"Quasi-CVT" Systems

Beyond the RatioZero, we offer clever "quasi-CVT" solutions that provide many benefits of continuous variable transmission in specialized applications where full CVT capability may not be required.

Operating Principle

How our quasi-CVT systems provide variable transmission benefits with simplified mechanisms

COMING SOON!
Quasi-CVT principle explanation

Our quasi-CVT systems allow a fixed number of ratios, but the engagement can be chosen continuously on the basis of a desired parameter. Such systems preserve some CVT benefits with greatly reduced size, complexity and cost.

Crown Drive

Crown Drive

Simple, but clever and effective, the Crown Drive is a modified epicyclic drive, providing 2 fixed ratios. The ratio selection is automatic, based on the resisting torque - but it can be electronically tailored. A "just enough" solution extremely cost- and energy-effective, scalable to the smallest dimensions and suitable for light mobility, robotics and industrial applications.

High efficiency
2-speed (or more by modularity)
High torque, good range
Proven technology, cost-effective
Patent Pending Contact us for details

Performance Highlights

Innovation in simplicity - Valuable features that do not cost an arm and a leg

95%+
Efficiency (tbc)

The Crown Drive yields the typical epicyclic efficiency of 95% to 98% per stage

2-speed per stage
Automatic shifting

The proprietary torque-sensitive shifting mechanism self-selects the appropriate ratio

± 50%
Adjustable Threshold

The torque level corresponding to the shift can be changed through an electronic control

2x
Easy integration

Compact, enclosed, easy to miniaturize, no power required for actuation

Sample Applications

The Crown Drive can be a game changed in many mechanical applications

Power drill application
Power drill
2-speed gearbox for Power Drills / Screw Guns

Easy to fit as an additional stage of a power drill or screw gun head, it automatically lowers speed and raises the torque when needed.

Construction Power Tools Automation
Crown Drive for Bike
Kids Bike
Bike application

Applied to a muscular bike, the Crown Drive can offer automatic shitfing for a simplified ride experience.

Mobility Driveline Innovation

Technology Roadmap

Our development timeline for bringing revolutionary transmission technology to market

Q4 2025 - Q4 2026
Prototype Validation

Bench testing and model validation of RatioZero prototypes

Current
Q3 2026
Pilot Programs

Launch pilot programs with select OEM partners in micromobility and off-highway

2027
Consolidated Partnership & Demos

Definition of mission profiles and extensive testing in real life environments

2028-2029
Commercial Production

Scale manufacturing and begin commercial deliveries to industry partners