Novel modular powertrain proposal for e-bicycle

Bicycles with electric pedal assist systems are becoming increasingly popular, with increasing versatility, a range of intended areas of use, and different design approaches for system realization. This paper deals with the proposal for a novel modular drivetrain concept based on a friction driving wheel, for which a brief design outline is given. Desired performances based on law constraints and average bicycle driving experience analysed, and basic powertrain properties required for their realization assessed.