Control System For A Continuously Variable Transmission

摘要

Control system for a continuously variable transmission with a first and a second pair of conical sheaves each with adjustable running radius, in which of each pair at least one sheave (14a, 14b) is coupled to a first and a second hydraulic actuator (20a, 20b) respectively which sets the axial sheave position in dependence of the amount of hydraulic medium supplied thereto, in which the actuators are connected with means to supply and discharge thereto/therefrom respectively, hydraulic medium, and one actuator is connected to a source of hydraulic pressure medium, and in which furthermore the first and second actuator respectively is connected with a first and second control chamber (60, 124) respectively, filled with hydraulic medium and having a variable control volume, in such a way that an increase of the first control volume is coupled to a decrease of the second control volume, and vice versa.

主权项

1. A control system for a continuously variable transmission, said transmission comprising a first and a second pair of conical sheaves with adjustable running radius, in which of each pair at least one primary sheave is coupled to a first respectively second hydraulic actuator determining the axial sheave position in dependence of an amount of hydraulic medium supplied thereto, the actuators being connected with means to supply and discharge hydraulic medium thereto and therefrom, while one actuator is connected with a supply of hydraulic pressure medium, wherein the first and second actuator respectively is connected with a first and second respectively control chamber filled with hydraulic medium and provided with a controllable variable control volume, in such a way that an increase of the first control volume is coupled with a decrease of the second control volume and vice versa.