Driven is trying to revolutionize the e-bike market with a gear system adapted from hybrid cars. With its Orbit Drive without gear trays or chains, the manufacturer promises better autonomy and almost no maintenance.
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The vast majority of electrically assisted bicycles (EABs) are exactly what the name suggests: simple bicycles to which manufacturers have added an electric motor, without touching the basic design. We find the same gear system that uses chainrings and a derailleur, with a torque sensor to determine the necessary assistance.
Driven is one of a small number of companies that want to revolutionize e-bikes. Its Orbit Drive incorporates a continuously variable transmission (CTV), inspired by hybrid cars that must combine the power of electric and combustion engines. It combines the force exerted by the cyclist and by the engine thanks to an ingenious system of planetary gears adapted to be integrated on a bicycle.
Chain-free operation
The system has two motors. The main motor provides the torque, up to 90 Nm, and a secondary motor adjusts the speed. The gear change takes place automatically, but can also be set manually. According to Driven, the lack of derailleur and chainrings combined with the fact that the system is covered, instead of exposed like on a regular bike, makes the Orbit Drive much more durable. It would be virtually maintenance free for over 10,000 miles and would be lighter than current systems. The manufacturer estimates that it would increase autonomy by 20% compared to a standard VAE.
The bike can work with a shaft drive, or more conventionally, with a chain or belt, making it easier for bike builders to integrate. So far, Driven has only built a few working e-bike prototypes, and launched a fundraising campaign to the tune of $618,000. via le site Wefunder.
