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ANDEGURO Bike with CVT Hub


bicycle hub with continuously variable gear (based on CVT Edyson concept)

using only geared sprokets for the movement


This is not an epicicloidal transmission !



Edyson CVT is a stepless speed variator using only toothed gears /sprockets, which can be used on any traditional engine (gasoline, diesel, CNG), electric motors, steam or wind turbines, bicycles (human power), as well as a large number of industrial or agriculutre applications, replacing the current transmission also toothed belt or chain drive, however, every time and need some adjustment of the ratio in a mechanical transmission.


Patent Protected Technology !



The continuously variable transmission hub based on Edyson CVT using only pinions, can change under stress or when stationary, with a simple movement of the control knob (similar to the normal gearbox).

Unlike other solutions already existing the present invention uses only normal toothed pinions inside it, without any element that could slip or belts that work by friction, the fact mode that allows the continuous variation of the transmission ratio in a more efficient.


Innovative aspects:
A variation to choose any value in the range available without interruption or jumps in cycling.
This variator transmission system has the weight and complexity comparable to existing systems.
Changes of the transmission ratio can be done in a continuous manner during operation, even when stationary.


Edyson CVT bring a lot of benefits into an electric motors transmission (and also on other transmission systems) because can maintain the electric motor at a relatively constant speed (selected at an optimum efficiency/torque point for the motor) and adjust the vehicle's forward speed by varying the transmission ratio over a smooth continuous range with electronic choice of ratio.
With an efficency about 97% you loose only 3% of energy instead of much more in heat with AC motor and controller.



Continuous variation of the equivalent sprocket: 30 teeth to 10 teeth (ratio 3:1) .
The variation can also be wider (with some change on the size)
Can be adapt to any type of bicycle wheel replacing the groups of sprockets and the derailleur system.

In the tests with assisted bicycle with electronic choice of ratio, we have proving the increasing of the efficiency in acceleration and battery life time.


The calculation of the efficiency of Edyson CVT has been done by the University of Padua and can reached the following LINK.

The patent also provides a simple addition, not published yet, to eliminate almost entirely the internal oscillations.


Andeguro Bike