公开(公告)号：US20120135829A1

公开(公告)日：2012-05-31

申请号：US13266804

申请日：2009-04-30

申请人： Katsumi Doihara ,  Yoshihisa Kodama ,  Yasuaki Yoshikawa ,  Masahiro Nishi ,  Keisuke Koyama ,  Kenta Nakamura ,  Kiyotaka Sawano ,  Hedemasa Kawaguchi

发明人： Katsumi Doihara ,  Yoshihisa Kodama ,  Yasuaki Yoshikawa ,  Masahiro Nishi ,  Keisuke Koyama ,  Kenta Nakamura ,  Kiyotaka Sawano ,  Hedemasa Kawaguchi

IPC分类号： F16H61/662

CPC分类号： F16H61/66272 ,  F16H2059/465 ,  Y10T477/624

摘要： Provided is control device and method for a belt type continuously variable transmission which can reduce drive energy consumption by a decrease in belt friction when the estimated accuracy of belt slip condition is high and which can prevent the belt from greatly slipping during belt slip control when the estimated accuracy of belt slip condition is low. The device includes a primary pulley (42), a secondary pulley (43), and a belt (44) and controls gear ratio based on the running radius of the belt (44) on the pulley by controlling the primary oil pressure and the secondary oil pressure. A belt type continuously variable transmission (4) comprises a belt slip control means (FIG. 8) for performing such control so as to oscillate the secondary oil pressure, estimate the belt slip condition by monitoring the phase difference between an oscillation component included in the actual secondary oil pressure and an oscillation component included in the actual gear ratio, and then reduce the actual secondary oil pressure to maintain a predetermined belt slip condition based on the estimation, and an oscillation setting means (sine wave oscillator 93a) for setting an oscillation amplitude of the secondary hydraulic pressure small when the gear ratio is a high gear ratio compared with when the gear ratio is a low gear ratio in a case of oscillating the secondary hydraulic pressure in the belt slip control.

摘要翻译： 提供了一种带式无级变速器的控制装置和方法，当皮带打滑状态的估计精度高时，能够减少皮带摩擦的驱动能量消耗，并且可以防止皮带在皮带打滑控制期间大大滑动 皮带滑移条件的估计精度低。 该装置包括主滑轮（42），辅助滑轮（43）和皮带（44），并且通过控制主油压和次级滑轮来控制基于皮带轮（44）的滑轮的行驶半径的传动比 油压。 带式无级变速器（4）包括用于进行这种控制以便振荡次级油压的皮带打滑控制装置（图8），通过监测包括在第二油压中的振荡分量之间的相位差来估计皮带打滑状况 实际二次油压和包含在实际齿轮比中的振动分量，然后基于该估计降低实际的二次油压以保持预定的皮带打滑状态，以及用于设定振荡的振荡设定装置（正弦波振荡器93a） 当在皮带打滑控制中使二级液压振动的情况下，当齿轮比为低齿轮比时齿轮比为高齿轮比时，副液压的振幅小。