Do EVs need gears? Bosch’s new CVT4EV improves EV efficiency by 4%
Bosch has a new CVT for electric cars. It is called the CVT4EV and the name is self-explanatory enough.
Yes, most electric cars of today only need one forward gear with the exception of the Porsche Taycan and the Audi e-tron GT.
But Bosch says certain applications still call for a variable transmission even for the torquey electric vehicles. In the following situations, battery charge drops rapidly:
- - towing trailers
- - tackling steep ascents with a heavy load on board,
- - driving longer freeway stretches at high speed
So, Bosch’s CVT4EV is a CVT can improve efficiency by 4%.
Depending on design, this can provide more torque in traction mode, better acceleration, or a higher maximum speed.
“The CVT4EV expands the electrical car’s repertoire,” says Gert-Jan van Spijk, who is in charge of CVT engineering at Bosch.
Bosch contributes its systems expertise plus several components to the complete CVT solutions offered by specialized transmission manufacturers.
One benefit for the average EV is that it can now run on a smaller/cheaper/less powerful electric motor with the help of a good variable transmission. The improved efficiency could also extend the EV battery range.
The concept of the CVT4EV with numerous Bosch components comes from Bosch Transmission Technology B.V., a Dutch subsidiary of Bosch.
Based in Tilburg, the company is a leader in the development and mass production of CVT push belts. Full CVT4EV solutions are available through specialized transmission suppliers.