The gear-box of CVT should be stabilized more than double separation and reunion, CVT can realize infinitely variable speeds inside quite wide range, what can obtain transmission system and engine operating mode is optimal match.
Advantage
The expression of 1. gear-box special smooth-going feels without frustration, the speed ratio of CVT gear-box is successive and alterable, won't produce frustration move so.
2. engine can maintain economic speed continuously, because CVT gear-box speed ratio is successive alterable and can with difference fast linkage, so engine rotate speed accepts the restriction that speed changes no longer, this are AT or DCT gear-box short of.
Defect
1. does not suit big platoon to measure cross-country perhaps car to use, because CVT gear-box was to introduce metal strip tendency drive, so motivation outputs the limitation with get certain, may exceed static friction power otherwise and appear skid phenomenon, wear away thereby metal strip.
2. needs to restrict the output power of engine and torque, too great engine output power and torque can damage metal strip, this two big drawback also are the advantage with AT and DCT the biggest transmission case only.
