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    • 2. 发明申请
    • HYDRAULIC CONTROL SYSTEM OF CONTINUOUSLY VARIABLE TRANSMISSION
    • 连续可变传动液压控制系统
    • WO2009087456A1
    • 2009-07-16
    • PCT/IB2008/003600
    • 2008-12-23
    • TOYOTA JIDOSHA KABUSHIKI KAISHAOGATA, YusukeAOYAMA, Toshihiro
    • OGATA, YusukeAOYAMA, Toshihiro
    • F16H61/12F16H61/662
    • F16H61/12F16H61/0206F16H61/66259F16H2061/1232F16H2061/1264
    • A hydraulic control system of continuously variable transmission includes: a first sheave pressure regulating valve (17) that regulates a line pressure (Pl), which is used for hydraulic control as a source pressure, to obtain a first sheave pressure (Pin); a fail-safe valve (19) that selects and outputs any one of the first sheave pressure (Pin) or a fail-safe hydraulic pressure (second sheave pressure Pout) that is applied to a drive pulley (21) at the time of a failure due to an excessive first sheave pressure (Pin) to the drive pulley (21); and an orifice (25) that is provided in an oil passage (24) between the fail-safe valve (19) and the drive pulley (21). Then, a hydraulic pressure in the oil passage (24) on the drive pulley (21) side of the orifice (25) is supplied to the first sheave pressure regulating valve (17) as a feedback pressure.
    • 无级变速器的液压控制系统包括:第一滑轮压力调节阀(17),用于调节用于液压控制作为源压力的管路压力(P1),以获得第一滑轮压力(Pin); 一个故障安全阀(19),其选择并输出在一个驱动滑轮(21)施加到驱动滑轮(21)上的第一滑轮压力(Pin)或故障安全液压(第二滑轮压力Pout)中的任何一个 由于驱动滑轮(21)的第一滑轮压力(Pin)过大导致的故障; 以及设置在故障保护阀(19)和驱动滑轮(21)之间的油路(24)中的孔口(25)。 然后,作为反馈压力,将第一滑轮压力调节阀(17)的孔口(25)的驱动带轮(21)侧的油路(24)的液压供给到第一滑轮压力调节阀(17)。