CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION FOR VEHICLE
To suppress unstable behavior in a gear change ratio and occurrence of shortage of a hydraulic pressure of a secondary pulley even when an accelerator pedal is released, while suppressing belt slip by increasing the hydraulic pressure of the secondary pulley during wheel spin.SOLUTION: A control dev...
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Zusammenfassung: | To suppress unstable behavior in a gear change ratio and occurrence of shortage of a hydraulic pressure of a secondary pulley even when an accelerator pedal is released, while suppressing belt slip by increasing the hydraulic pressure of the secondary pulley during wheel spin.SOLUTION: A control device of a continuously variable transmission 1 for a vehicle, including an oil pump driven by a drive source, and supplying a working fluid for applying thrust to clamp a belt to oil chambers of a primary pulley and a secondary pulley, includes gear change control means 7A for controlling a hydraulic pressure on the basis of a hydraulic pressure command value, by setting the hydraulic pressure command value for controlling the hydraulic pressure of the hydraulic fluid to apply the thrust, to a value of a low limit hydraulic pressure or more to prevent slip of the belt and a first upper limit hydraulic pressure or less not to prevent change of a gear change ratio, in a case when wheel spin occurs on a drive wheel 12.SELECTED DRAWING: Figure 1
【課題】ホイールスピン中にセカンダリプーリの油圧を高めてベルト滑りを抑制しつつ、アクセルペダルからの足離しを行っても、変速比の不安定な挙動やセカンダリプーリの油圧不足の発生を抑制することができるようにする。【解決手段】駆動源によって駆動され、プライマリプーリ及びセカンダリプーリの各油室にベルトを挟圧する推力を付与するための作動油を供給するオイルポンプを備えた車両用無段変速機1の制御装置であって、駆動輪12にホイールスピンが生じている場合に、推力を付与するための作動油の油圧を制御する油圧指令値を、ベルトの滑りを回避するための下限油圧以上であって変速比の変更を妨げないための第1上限油圧以下である値に設定して、油圧指令値に基づいて油圧を制御する変速制御手段7Aを備える。【選択図】図1 |
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