This method is based on a specific double rack that cooperates with gears linked to the output shaft through one-way clutches.
One or more of these racks are associated in order to create an infinitely variable transmission.
Applications are numerous : gearboxes and clutches for cars, scooters, bicycles and ships of all sizes, electricity generation, no-crank piston engines, absorbers and suspension generating electricity, braking systems, etc.
The Variable Diameter Gears This invention is a CVT (continuous variable transmission) which, for the first time, uses gears. It also brings a very efficient feature which is that the transmission ratio varies as a function of the resistive torque.
The model of the new version is nearly finalized:
How it works
The engine rotates the planet carrier (dark blue), which makes the three "secondary planets" rotate when they are in contact with the crown sector (bright pink). These secondary planets in turn make the primary planets and the sun rotate. The movement is sent out through the aluminum shaft.
A freewheel inside the "secondary planets", combined with synchronization teeth at the begining of the crown sector, guarantees that there cannot be any teeth conflict between them and the crown sector.
Modifying the angle between the secondary crown sector (light blue and the crown sector carrier (yellow) changes the radius of the crown sector, which changes the transmission ratio continously from positive to negative, going through a "zero" position where the secondary shaft would have to stop if the crown sector carrier (yellow) itself could not be rotating. When the crown sector rotates, it drives an electric generator or any type of KERS. The crown sector may also be driven by an electric enging adding its power to the one of the main engine.
Main advantages
Althought it is pretty small and light, with a quite low cost, it has the following characteristics:
it is a continuously variable transmission;
it is compatible with high powers, because it uses teeth and not friction;
there is a whole set of continuously variable forward and reverse transmission ratios;
it also natively works as a clutch;
it also natively works as a braking system, which can be used as a very powerful kinetic energy recovery system;
the energy efficiency is very high because there is practically no friction;
it allows to combine two engines, for example a thermic engine and an electric one.
This concept also allows a very large number of other combinations.
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it is a continuously variable transmission;
