GEAR RATIO CONTROL DEVICE OF TOROIDAL TYPE CONTINUOUSLY VARIABLE TRANSMISSION

• Main Authors: OISHI YASUNORI, SHINOJIMA TAKUMI
• Format: Patent
• Language: English; Japanese
• Published: 05.01.2017
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To realize a structure of a gear ratio control device of a toroidal type continuously variable transmission capable of controlling a gear ratio without setting gear change gain according to a rotational frequency of an input-side disc and an actual gear ratio of the toroidal type continuously variable transmission.SOLUTION: An actual displacement amount ycorresponding to a gear ratio at a present time of a toroidal type continuously variable transmission and a target displacement amount ycorresponding to a target gear ratio of the toroidal type continuously variable transmission determined according to an operation state at that time are respectively calculated and compared by a controller, with respect to a displacement amount (Y offset amount) in an axial direction of a pivot of a supporting member. In a case when a deviation exists between the actual displacement amount yand the target displacement amount y, a differential pressure of a pair of hydraulic chambers of an actuator is feedback controlled to eliminate the deviation.SELECTED DRAWING: Figure 5 【課題】入力側ディスクの回転数やトロイダル型無段変速機の実変速比に応じて変速ゲインを設定しなくても変速比制御を行える、トロイダル型無段変速機の変速比制御装置の構造を実現する。【解決手段】制御器により、支持部材の枢軸の軸方向に関する変位量（Ｙオフセット量）に関して、トロイダル型無段変速機の現時点での変速比に対応する実変位量ｙRealと、その時点での運転状態に応じて設定されるトロイダル型無段変速機の目標変速比に対応する目標変位量ｙTargetとをそれぞれ算出して比較する。そして、これら実変位量ｙRealと目標変位量ｙTargetとの間に偏差が存在する場合には、この偏差を解消する様に、アクチュエータの１対の油圧室の差圧をフィードバック制御する。【選択図】図５