Michelin develops new EV concept tire that cuts rolling resistance
By Andrew C., 30 Aug, 2010. 0 Comments
Michelin claims that its EV concept tire meets performance demands while delivering maximum grip and long tread life. Michelin explained that electric vehicles require tires that are specially designed to handle the higher low-end torque that electric motors generate.
These tires also need to be lighter and quieter. To reduce rolling resistance, Michelin‚ prototype tire has a comparatively large rim diameter and is relatively narrow, lowering energy consumption because there is less front rubber in the contact patch. This prototype was showcased at the Detroit Auto Show in January; however, Michelin has yet to disclose the tire's dimensions. Continued after the jump!
It said that the larger diameter combined with a low profile aids in reducing energy consumption since the tire turns fewer times when covering a given distance. This leads to less deformation and heat, which results to more energy savings.
Compared to Michelin‚ best conventional tire, the EV concept tire is claimed to have up to 15% less rolling resistance. The larger diameter also indicates that there is more rubber in the tread, which raises total mileage and reduces overall operating costs.
In addition, aerodynamics play a role in extending the range of an electric vehicle without compromising handling or safety since the size and shape of the tire-wheel assembly must be considered.
Michelin‚ engineers achieved the desired performance qualities by using the latest silica-based tread compounds, a new tire profile designed specifically for urban use and a tread design optimizing the surface of rubber in contact with the road.
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