Patent ID: 11913544
Assignee: MAZARO N.V.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A method for controlling a continuously variable transmission, wherein the continuously variable transmission comprises an input shaft and an output shaft being rotatably arranged about a common central rotation axis, a ring wheel and a sun wheel being coaxially arranged with respect to the central rotation axis, and at least one pivotable planet wheel, a pivot angle of the planet wheel determining a transmission ratio of the continuously variable transmission,
wherein the method comprises:
operating the transmission through drill-free rolling of the at least one planet wheel on surfaces of the ring wheel and the sun wheel, independently of the pivot angle of the planet wheel, wherein the ring wheel, the at least one planet wheel, and the sun wheel are clamped together such that the ring wheel exerts a first normal force on the at least one planet wheel and the sun wheel exerts a second normal force on the at least one planet wheel; and
controlling the first and second normal forces such that, when the continuously variable transmission operates at a given input speed, a given transmitted torque, and a given constant transmission ratio, a predefined static value of the first and second normal force is applied, such that a condition of microslip is applied to rolling contacts between the at least one planet wheel and the ring wheel and the sun wheel;
wherein, during a continuous increase or decrease of the pivot angle and thereby of the transmission ratio, any force component added to the static values of the first and the second normal forces is either zero or smaller than necessary to maintain the microslip condition.