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    Control device for continuously variable transmission for vehicles and method of controlling the same
    21.
    发明授权
    Control device for continuously variable transmission for vehicles and method of controlling the same 失效
    用于车辆无级变速器的控制装置及其控制方法

    公开(公告)号：US5259272A

    公开(公告)日：1993-11-09

    申请号：US951115

    申请日：1992-09-25

    申请人： Hiroaki Yamamoto ,  Yoshinori Yamashita ,  Katsuhiko Taniguchi

    发明人： Hiroaki Yamamoto ,  Yoshinori Yamashita ,  Katsuhiko Taniguchi

    IPC分类号： B60W10/06 ,  B60W30/18 ,  F16H59/06 ,  F16H61/00 ,  F16H61/12 ,  F16H61/66 ,  F16H61/662 ,  F16H61/02

    CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/101 ,  B60W30/18 ,  B60W30/1819 ,  F16H61/66 ,  F16H61/66259 ,  F16H2061/6618 ,  F16H61/12 ,  Y10T477/624

    摘要： In a continuously variable transmission of the type in which a speed change ratio is changed in a manner that the radius of rotation of a belt wound around a drive pulley and a driven pulley is varied by changing the width of a groove between the pulley parts of each pulley with an oil pressure. A control means for controlling an oil pressure in various control modes shifts the control mode from a hold mode to a start mode, when a driver manipulates a vehicle carrying the continuously variable transmission with his intention to start the vehicle, and an amount of discharge flow of an oil pump for generating an oil pressure exceeds a preset value. The safety factor in a stationary state is calculated using the effective tension of the CVT belt, secondary side oil pressure, and the speed change ratio. Using the calculated stationary state safety factor, a manipulated variable previously gained, and a changing rate of the primary oil pressure, a safety factor in a speed change state (transient state) is calculated. A manipulated variable of the speed change control means is limited so that the safety factor in a speed changing state exceeds a predetermined value. When the speed change performance may be damaged with the limitation of manipulated variable, a necessary quantity of the line pressure or the CVT input torque is corrected so as to increase the limit value.

    摘要翻译： 在变速比变化的无级变速器中，通过改变带轮部分之间的槽的宽度来改变缠绕在驱动带轮和从动带轮上的带的旋转半径， 每个滑轮都有油压。 用于控制各种控制模式中的油压的控制装置将控制模式从保持模式转移到起动模式，当驾驶员操纵携带无级变速器的车辆时，意图启动车辆，并且排出流量 用于产生油压的油泵超过预设值。 使用CVT带的有效张力，二次侧油压和变速比来计算静止状态下的安全系数。 使用计算出的静止状态安全系数，先前获得的操纵变量和初级油压的变化率，速度变化状态（过渡状态）的安全系数。 变速控制装置的操作变量被限制，使得变速状态下的安全系数超过预定值。 当变速性能受到可控变量的限制而可能损坏时，校正线路压力或CVT输入转矩的必要量，以便增加极限值。

    Shift control method of continuously variable transmission
    22.
    发明授权
    Shift control method of continuously variable transmission 失效
    连续可变传输的变换控制方法

    公开(公告)号：US5131297A

    公开(公告)日：1992-07-21

    申请号：US662287

    申请日：1991-02-28

    申请人： Yoshinori Yamashita ,  Hiroaki Yamamoto

    发明人： Yoshinori Yamashita ,  Hiroaki Yamamoto

    IPC分类号： F16H61/662

    CPC分类号： F16H61/66259 ,  Y10T477/62429

    摘要： A shift control method is provided for controlling shifting in a continuously variable transmission. The transmission changes a gear ratio by increasing or decreasing the turning radius of a belt installed on a pair of pulleys. Each pulley includes a fixed pulley member and a movable pulley member, and the belt turning radius is varied by varying the width of a groove defined between the respective pulley members. The transmission has a shift control range associated therewith which is determined on the basis of the component structural elements thereof, and this shift control range is bounded by a ratio line. The shift control method includes providing a control means for setting a target engine speed according to input throttle opening and vehicle speed information, and setting a limit value of said target engine speed in the vicinity of the ratio line but outside of the shift control range.

    摘要翻译： 提供了一种用于控制无级变速器中的换档的换档控制方法。 传动通过增加或减少安装在一对滑轮上的皮带的转弯半径来改变传动比。 每个滑轮包括固定滑轮构件和可动滑轮构件，并且通过改变限定在各个滑轮构件之间的凹槽的宽度来改变皮带转动半径。 变速器具有与其相关联的变速控制范围，其基于其部件结构要素而确定，并且该变速控制范围由比例线限制。 变速控制方法包括提供一种控制装置，用于根据输入的节气门开度和车速信息来设定目标发动机转速，并将所述目标发动机转速的极限值设定在所述比例线附近，但是在变速控制范围之外。

    Method of controlling continuous variable transmission
    25.
    发明授权
    Method of controlling continuous variable transmission 失效
    控制连续变量传输的方法

    公开(公告)号：US5050455A

    公开(公告)日：1991-09-24

    申请号：US588614

    申请日：1990-09-26

    申请人： Yoshinori Yamashita ,  Sadayuki Hirano ,  Takumi Tatsumi ,  Hiroaki Yamamoto

    发明人： Yoshinori Yamashita ,  Sadayuki Hirano ,  Takumi Tatsumi ,  Hiroaki Yamamoto

    IPC分类号： B60W10/06 ,  B60W30/18 ,  F16H59/06 ,  F16H61/66 ,  F16H61/662

    CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/101 ,  B60W30/18 ,  B60W30/1819 ,  F16H61/66 ,  F16H61/66259 ,  Y10T477/623 ,  Y10T477/6242

    摘要： A method of controlling a continuously variable transmission which includes a fixed pulley member and a movable pulley member supported relative to the fixed pulley member so as to be movable both toward and away from the fixed pulley member, including the steps of decreasing and increasing the width of a groove defined between the pulley members to thereby respectively increase and decrease a rotational radius of a belt which is received between the pulley members in the groove. When a target engine rotational speed based on throttle opening degree and vehicle velocity changes during vehicle running, a transient speed change control is performed so as to change a belt ratio of the transmission based on a predetermined rate limit value. A control unit is provided for receiving the throttle opening degree and vehicle velocity and executing the transient speed change control. During execution of the transient speed change control, the rate limit value is changed in accordance with the throttle opening degree and vehicle velocity, the throttle opening is changed on the basis of vehicle velocity, and the final target engine rotational speed is changed on the basis of the rate limit value. A time limit for execution of transient control is set on the basis of the throttle opening degree and the vehicle velocity.