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    • 1. 发明公开
    • CONTROL DEVICE FOR BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION
    • STEUERUNGSVORRICHTUNGFÜREIN STUFENLOSES RIEMENGETRIEBE
    • EP2980454A4
    • 2017-05-03
    • EP13880529
    • 2013-11-28
    • JATCO LTDNISSAN MOTOR
    • AOKI DAISUKEKOBAYASHI TAKAHIROTAKAHASHI SEIICHIROSUZUKI YUTA
    • F16H61/662
    • F16H61/66272F16G1/22F16H9/18F16H2061/66277
    • A control device for a belt-type continuously variable transmission CVT includes an engine 1, a belt-type continuously-variable transmitting mechanism 4; a forward/reverse switching mechanism 3 including a forward clutch 31 and a reverse brake 32; and a hydraulic control circuit 71 configured to control a pulley hydraulic pressure and engagement-element pressures for the forward clutch 31 and the reverse brake 32. The control device includes a selection control means for outputting a pulley hydraulic command to obtain an idle-time clamping pressure which is higher than an idle-time minimum pressure (idle-time MIN-pressure) calculated from an input torque, to the hydraulic control circuit 71, when the engine 1 is in operation during a selection of N-range. A position of an element clearance generated in the belt can be maintained even if drag torque is inputted.
    • 带式无级变速器CVT的控制装置包括发动机1,带式无级变速机构4, 包括前进离合器31和后退制动器32的前进后退切换机构3, 以及液压控制回路71,该液压控制回路71被构造成控制用于前进离合器31和后退制动器32的皮带轮液压压力和接合元件压力。控制装置包括选择控制装置,用于输出皮带轮液压指令以获得空转时间夹紧 当发动机1在选择N档期间运行时,将比输入转矩计算出的怠速时间最小压力(怠速时间MIN压力)高的压力传递给液压控制回路71。 即使输入了拖曳转矩,也能够维持在带中产生的元件间隙的位置。