Control mechanism for hydrostatic-mechanical power transmission system
    171.
    发明授权
    Control mechanism for hydrostatic-mechanical power transmission system 失效
    静力机械动力传动系统控制机构

    公开(公告)号:US5540051A

    公开(公告)日:1996-07-30

    申请号:US529318

    申请日:1995-09-18

    摘要: A control mechanism for a hydrostatic-mechanical power transmission system having a mechanical transmission unit driven through an input shaft connectable to a power source, and a hydrostatic transmission unit that is connectable to the input shaft and includes a pump and a motor each having a displacement setting swash plate. The control mechanism further includes a differential unit for connecting an output shaft to the mechanical transmission unit and the hydrostatic transmission unit to drive. At least either of the displacement setting swash plates is variable in angle. The control mechanism also includes a throttle position detector for detecting the position of a throttle in relation to the power source; a target motor speed ratio setting device for setting, based on the position of the throttle detected by the throttle position detector, a target motor speed ratio that is a target value for the ratio of the revolution speed of the motor in the hydrostatic transmission unit to the revolution speed of the power source; and a swash plate angle controller for controlling at least either of the angles of the displacement setting swash plates by feed-forward control in which the target motor speed ratio set by the target motor speed ratio setting device is used in such a way that the ratio of a displacement volume of the pump to a displacement volume of the motor is made to follow the target motor speed ratio.

    摘要翻译: 一种用于具有通过可连接到电源的输入轴驱动的机械传动单元的静液力 - 机械动力传递系统的控制机构,以及可连接到输入轴的静液压传动单元,其包括泵和电动机,每个泵和电动机具有位移 设置斜盘。 该控制机构还包括用于将输出轴连接到机械传动单元和驱动静液压传动单元的差动单元。 位移设置斜盘中至少有一个角度是可变的。 所述控制机构还包括用于检测节气门相对于所述动力源的位置的节气门位置检测器; 目标电动机速比设定装置,其基于由节气门位置检测器检测到的节流阀的位置,设定作为静压传动装置中的电动机的转速与静液压传动装置的转速之比的目标值的目标电动机转速比 电源的转速; 以及斜盘角度控制器,用于通过前馈控制来控制位移设定斜盘的至少任一个角度,其中由目标电动机速比设定装置设定的目标电动机速比以这样的方式使用: 使泵的排量大小与电机的排量成正比,达到目标电机的转速比。

    Dozing control unit for a bulldozer
    172.
    发明授权
    Dozing control unit for a bulldozer 失效
    打夯推土机的控制单元

    公开(公告)号:US5535830A

    公开(公告)日:1996-07-16

    申请号:US231676

    申请日:1994-04-25

    摘要: A dozing control unit for a bulldozer, comprising an actual tractive force detector for detecting the actual tractive force of a vehicle body; a driving mode selector button capable of switching a manual operation mode to an automatic driving mode in dozing operation; and a blade controller for controlling a blade to be lifted or lowered such that if there is a difference between the actual tractive force detected by the actual tractive force detector and a target tractive force set for the automatic driving mode when the manual operation mode is switched to the automatic driving mode by the driving mode selector button, the actual tractive force gradually comes closer to the target tractive force.

    摘要翻译: 一种用于推土机的推土机控制单元,包括用于检测车身的实际牵引力的实际牵引力检测器; 驱动模式选择器按钮,其能够在打盹操作中将手动操作模式切换到自动驾驶模式; 以及叶片控制器,用于控制叶片被提升或降低,使得如果在切换手动操作模式时实际牵引力检测器检测到的实际牵引力与为自动驾驶模式设定的目标牵引力之间存在差异 通过驾驶模式选择器按钮到自动驾驶模式,实际牵引力逐渐接近目标牵引力。

    Shift control system for vehicular automatic transmission
    174.
    发明授权
    Shift control system for vehicular automatic transmission 失效
    车辆自动变速箱换档控制系统

    公开(公告)号:US5501642A

    公开(公告)日:1996-03-26

    申请号:US335846

    申请日:1995-02-21

    摘要: In order to control the engine output timing always properly irrespective of the aging of an automatic transmission, the present invention provides a shift control system for a vehicular automatic transmission, which system comprises: release end detecting means for detecting the release end of a frictional engagement element for a higher gear stage, at a shifting time from higher to lower gear stages; synchronism detecting means for detecting the synchronism between an engine R.P.M. and a rotating element in the automatic transmission at the lower gear stage; and engine output control means for controlling the output of the engine. The aforementioned engine output control means starts the rise control of the engine output, when the release end of the frictional engagement element for the higher gear stage is detected by the release end detecting means, and ends the rise control of the aforementioned engine output when the synchronism between the engine R.P.M. and the rotating element in the automatic transmission at the lower gear stage is detected by the synchronism detecting means.

    摘要翻译: PCT No.PCT / JP94 / 00383 Sec。 371日期1995年2月21日 102(e)日期1995年2月21日PCT 1994年3月9日PCT公布。 出版物WO94 / 21484 日期1994年9月29日。为了始终适当地控制发动机输出定时,与自动变速器的老化无关,本发明提供了一种用于车辆自动变速器的变速控制系统,该系统包括:释放端检测装置, 用于较高档位的摩擦接合元件的释放端,从高档到低档级的换档时间; 同步检测装置,用于检测发动机R.P.M. 以及在低档级的自动变速器中的旋转元件; 以及用于控制发动机的输出的发动机输出控制装置。 上述发动机输出控制装置,当通过释放端检测装置检测到用于较高档位的摩擦接合元件的释放端时,开始发动机输出的上升控制,并且当上述发动机输出的上升控制 发动机RPM之间的同步 并且由同步检测装置检测在低档级的自动变速器中的旋转元件。

    Speed change control apparatus and method for an automatic transmission
in a vehicle
    176.
    发明授权
    Speed change control apparatus and method for an automatic transmission in a vehicle 失效
    用于车辆中的自动变速器的变速控制装置和方法

    公开(公告)号:US5445579A

    公开(公告)日:1995-08-29

    申请号:US105171

    申请日:1993-08-12

    摘要: A speed change control method and apparatus for a vehicular automatic transmission having a first-speed clutch for establishing a first speed and a second-speed clutch for establishing a second speed, includes subjection of at least a duty ratio Dr of a second-speed solenoid valve for supplying oil pressure to the second-speed clutch to feedback control, so that the first-speed clutch is engaged while disengaging the second-speed clutch. This thereby increases a turbine rotational speed Nt toward the first-speed synchronous rotational speed. Further, an upper limit value Dmax of the duty ratio Dr is set, and the duty ratio Dr is subject to feedback control within a resultant duty ratio range. This thereby prevents the duty ratio Dr from being set at an excessive value caused by a delay in the rise of the oil pressure. As a result, even if a depression of an accelerator pedal is suddenly increased during a downshifting process, an interlock problem can be prevented, thereby ensuring smooth speed change.

    摘要翻译: 一种用于具有用于建立第一速度的第一速离合器和用于建立第二速度的二速离合器的车辆自动变速器的变速控制方法和装置,包括至少将二次电磁铁的占空比Dr 用于向二速离合器供给油压以进行反馈控制的阀,使得一档离合器在脱离第二速离合器的同时接合。 从而将涡轮转速Nt提高到第一速度同步转速。 此外,设定占空比Dr的上限值Dmax,并且在合成占空比范围内对占空比Dr进行反馈控制。 由此,能够将占空比Dr设定在由油压上升延迟引起的过大的值。 结果,即使在降档过程中加速踏板的下压突然增加,也可以防止互锁问题,从而确保平稳的速度变化。