Feb. 26, 2018
Direct Shift-CVT: A New Type of Continuously Variable Transmission
The basic function of any transmission system is to achieve transmission efficiency, high-efficiency engine ranges, and highly responsive gear changes. To improve these functions, Toyota has striven to reduce mechanical loss, adopt a wider gear range, and improve shift tracking. These initiatives have resulted in a direct and smooth driving experience with superior fuel efficiency, which has been improved by six percent over the existing transmission system.
Realization of best-in-class* shift speed ratio spread and a 6% improvement in fuel efficiency.
*As of February 2018 (Toyota Motor Corporation)
Shift performance equal or greater than DCTs produced by other companies.
Details of new technologies
By adopting launch gears, it is possible to improve belt efficiency and increase ratio spread by 15% without performance deterioration.
Shift speed is improved with a reduction of the belt angle from 11 degrees to 9 degrees. (shift speed increase of 20%)
The adoption of launch gears reduces the belt load. Shift responsiveness has improved through downsizing of the pulley and reduction of inertia by 40%.