US 8,996,263 B2 · Controller for variable transmission

Abstract

An electronic controller for a variable ratio transmission and an electronically controllable variable ratio transmission including a variator or other CVT are described herein. The electronic controller can be configured to receive input signals indicative of parameters associated with an engine coupled to the transmission. The electronic controller can also receive one or more control inputs. The electronic controller can determine an active range and an active variator mode based on the input signals and control inputs. The electronic controller can control a final drive ratio of the variable ratio transmission by controlling one or more electronic solenoids that control the ratios of one or more portions of the variable ratio transmission.

Claims9

Dependent claims

A method of controlling a variable ratio transmission having a longitudinal axis, the method comprising:

providing a plurality of planet-and-shift-lever subassemblies arranged radially about the longitudinal axis, wherein a transmission ratio of the transmission corresponds to a angle of a rotational axis of the planet-and-shift-lever subassemblies;
providing a shift-cam-and-sun subassembly operably coupled to each planet-and-shift-lever subassembly, the shift-cam-and-sun subassembly located radially inward of each planet-and-shift-lever subassembly, the shift-cam-and-sun subassembly having a sun operably coupled to a plurality of control pistons, the sun and control pistons aligned with the longitudinal axis;
receiving one or more electronic input values;
controlling a current applied to a control solenoid to vary an axial position of the control pistons to thereby vary the angle of the rotation axis.

1 more element

Dependencies are inferred from the claim text.

Controller for variable transmission

Life of this patent

Controller for variable transmission

Life of this patent

Abstract

Claims9