Method and device for filtering target transmission ratio of continuously variable transmission for vehicle

Abstract

A method of filtering a target transmission ratio of a continuously variable transmission of a vehicle includes: controlling, by a controller, a vehicle speed filter configured to filter a speed signal of a vehicle distorted due to vibration of the vehicle; controlling, by the controller, a target driving pulley speed memory configured to output a target driving pulley speed signal of the continuously variable transmission based on an output value of an acceleration pedal sensor and the filtered speed signal of the vehicle; and controlling, by the controller, a transmission calculator configured to calculate a target transmission ratio of the continuously variable transmission that is a stable value based on the target driving pulley speed signal of the continuously variable transmission and the filtered speed signal of the vehicle, wherein the vehicle speed filter increases filtering capability and a response speed of the vehicle speed filter and decreases the speed signal of the vehicle to a value that makes the target transmission ratio of the continuously variable transmission stable.

Dependencies are inferred from the claim text.