WORKING VEHICLE
    21.
    发明申请
    WORKING VEHICLE 有权
    工作车辆

    公开(公告)号:US20140322045A1

    公开(公告)日:2014-10-30

    申请号:US14364177

    申请日:2012-12-12

    申请人: YANMAR CO., LTD.

    发明人: Kunihiko Sakamoto

    IPC分类号: E02F9/22

    摘要: The present invention addresses the problem of being able to increase the effect of preventing an engine from stalling by reducing the engine load attributable to a fixed-capacity hydraulic pump. A working vehicle provided with a fixed-capacity hydraulic pump driven by power from an engine and a working hydraulic actuator driven by working oil pumped from the fixed-capacity hydraulic pump is a rotary working vehicle which is provided with a pressure modifying means for modifying the pressure of working oil from the fixed-capacity hydraulic pump, and the rotary working vehicle is such that if the actual number of revolutions (N) of the engine is reduced by a set number of revolutions (Ns) as the load on the engine increases, then the pressure modifying means operates in accordance with the deviation (e) between the actual number of revolutions (N) of the engine and the specified number of revolutions (Ns), and the pressure of the working oil from the fixed-capacity hydraulic pump is modified.

    摘要翻译: 本发明解决了通过降低归因于固定容量液压泵的发动机负荷而能够增加防止发动机失速的效果的问题。 具有由发动机驱动的固定容量液压泵和从固定容量液压泵泵送的工作油驱动的工作液压致动器的工作车辆是设有压力修正装置,用于改变 来自固定容量的液压泵的工作油的压力和旋转作业车辆使得如果当发动机的负载增加时发动机的实际转数(N)减小设定的转数(Ns) 那么压力修正装置根据发动机的实际转速(N)和规定转速(Ns)之间的偏差(e)和来自固定容量液压的工作油的压力 泵被修改。

    HYDRAULIC CONTROL SYSTEM HAVING ELECTRONIC FLOW LIMITING
    22.
    发明申请
    HYDRAULIC CONTROL SYSTEM HAVING ELECTRONIC FLOW LIMITING 有权
    具有电子流量限制的液压控制系统

    公开(公告)号:US20140060025A1

    公开(公告)日:2014-03-06

    申请号:US13718938

    申请日:2012-12-18

    申请人: CATERPILLAR INC.

    IPC分类号: F15B21/08

    摘要: A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, an actuator, and a control valve configured to direct fluid from the pump to the actuator and from the actuator to the tank. The hydraulic control system may also have a pressure sensor to generate a first signal indicative of a pressure differential across the control valve, an operator input device to generate a second signal indicative of a desired movement of the actuator, and a controller. The controller may be configured to make a first determination of an opening amount of the control valve based on the second signal, and to make a second determination based on the first signal of whether the opening amount will result in overspeeding of the actuator. The controller may also be configured to reduce the opening amount based on the second determination.

    摘要翻译: 公开了一种用于机器的液压控制系统。 液压控制系统可以具有罐,泵,致动器和配置成将流体从泵引导到致动器并且从致动器引导到罐的控制阀。 液压控制系统还可以具有压力传感器以产生指示跨越控制阀的压力差的第一信号,操作者输入装置以产生指示致动器的期望运动的第二信号和控制器。 控制器可以被配置为基于第二信号来首先确定控制阀的打开量,并且基于第一信号来确定开启量是否将导致致动器的超速。 控制器还可以被配置为基于第二确定来减少打开量。

    Device and method for controlling the position of a pneumatic actuator
    23.
    发明授权
    Device and method for controlling the position of a pneumatic actuator 有权
    用于控制气动执行器位置的装置和方法

    公开(公告)号:US07406910B2

    公开(公告)日:2008-08-05

    申请号:US11526447

    申请日:2006-09-23

    摘要: The invention pertains to a device for the controlling the position of a pneumatic actuator comprising: a pneumatically adjustable actuating element (5); a pneumatic actuating drive (6) for adjusting the actuating element (5); an electro-pneumatic position controller (1) for pneumatically driving the actuating drive (6) as a function of a position controller set point and a controlled variable; and at least one main pneumatic power amplifier (10) with bypass throttle for amplifying the power output of the position controller (1) and for pneumatically driving the actuating drive (6). In addition, a pilot control pneumatic power amplifier (9) with a bypass throttle for preamplifying the pneumatic power output of the position controller (1) is installed between the position controller (1) and the main power amplifier (10).

    摘要翻译: 本发明涉及一种用于控制气动致动器的位置的装置,包括:气动调节的致动元件(5); 用于调节致动元件(5)的气动致动驱动器(6); 用于根据位置控制器设定点和受控变量气动驱动所述致动驱动器(6)的电动气动位置控制器(1); 以及具有旁路节气门的至少一个主气动功率放大器(10),用于放大位置控制器(1)的功率输出并用于气动地驱动致动驱动器(6)。 此外,在位置控制器(1)和主功率放大器(10)之间安装有用于对位置控制器(1)的气动功率输出进行前置放大的旁通节气门的先导控制气动功率放大器(9)。

    Device for preventing unintentional restarting
    24.
    发明授权
    Device for preventing unintentional restarting 失效
    防止意外重启的装置

    公开(公告)号:US06679053B2

    公开(公告)日:2004-01-20

    申请号:US10173223

    申请日:2002-06-14

    IPC分类号: F15B13042

    摘要: A device for preventing the unintentional restarting of motors or machines is proposed, it being possible to control the supply of energy to the motor or to the machine by means of a control valve with a mechanically adjustable control element and it being possible to connect the control valve non-detachably to the motor or to the machine, the energy for the motor being generated by means of compressed air, and in that a pneumatic piston, to which the primary air pressure prevailing upstream of the motor and upstream of the control valve can be applied, being arranged as a restarting inhibitor between the control valve and the motor, and in that, in order to apply the primary air pressure, a connecting line being arranged between the motor and the piston.

    摘要翻译: 提出了一种用于防止电动机或机器意外重启的装置,可以通过具有机械可调控制元件的控制阀来控制对电动机或机器的能量供应,并且可以将控制 阀门不可拆卸地连接到电动机或机器,电动机的能量通过压缩空气产生,并且气动活塞,主动气压在电动机上游和控制阀上游的气动活塞可以 被布置为在控制阀和电动机之间的重新启动抑制器,并且为了施加一次空气压力,连接线布置在电动机和活塞之间。

    Thrust reverser safety system
    25.
    发明授权
    Thrust reverser safety system 失效
    推力反向器安全系统

    公开(公告)号:US5381654A

    公开(公告)日:1995-01-17

    申请号:US917421

    申请日:1992-07-23

    申请人: Yves R. Halin

    发明人: Yves R. Halin

    IPC分类号: F02K1/76 F15B11/024 F02K3/02

    摘要: A thrust reverser safety system for a turbofan engine is disclosed which is integrated into the hydraulic control system of the thrust reverser door so as to prevent the hydraulic actuator from permitting the thrust reverser door to be forced into its deployed, thrust reversing position. The hydraulic actuator defines a closing chamber which, when acted upon by pressurized hydraulic fluid, urges the thrust reverser door to its closed, forward thrust position. The safety system according to this invention provides a valve associated with the hydraulic control circuit and the closing chamber which prevents the hydraulic fluid from being forced out of the closing chamber. This positively prevents the thrust reverser door from moving to its deployed, thrust reversing position. The valve allows pressurized fluid to pass into the closing chamber so that the thrust reverser door may be normally actuated when desired, but prevents the withdrawal of the pressurized fluid from this closing chamber when the thrust reverser door has been fully closed.

    摘要翻译: 公开了一种用于涡轮风扇发动机的推力反向器安全系统,其集成到推力反向器门的液压控制系统中,以防止液压致动器允许推力反向器门被迫进入其展开的推力反向位置。 液压致动器限定了一个关闭室,当被加压的液压流体作用时,其将推力反向器门推向其关闭的向前推力位置。 根据本发明的安全系统提供了与液压控制回路和关闭室相关联的阀,其防止液压流体被迫离开关闭室。 这正确地防止推力反向器门移动到其展开的推力反向位置。 阀允许加压流体进入关闭室,使得推力反向器门可以在需要时正常地致动,但是当推力反向器门已经完全关闭时,防止加压流体从该关闭室中撤出。