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    HYDRAULIC CONTROL DEVICE OF WHEELED INDUSTRIAL VEHICLE
    4.
    发明授权
    HYDRAULIC CONTROL DEVICE OF WHEELED INDUSTRIAL VEHICLE 有权
    轮式工业车辆液压控制装置

    公开(公告)号：EP2806072B1

    公开(公告)日：2017-12-13

    申请号：EP12865647.7

    申请日：2012-10-05

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： KODAKA Katsuaki ,  ITOGA Kentaro ,  ICHIMURA Kazuhiro

    IPC分类号： E02F9/22 ,  B60T13/66 ,  B60T17/00 ,  F15B21/14 ,  B60T13/14 ,  B60T13/68 ,  E02F9/20 ,  F02D29/04

    CPC分类号： F15B1/027 ,  B60T13/141 ,  B60T13/662 ,  B60T13/686 ,  E02F9/2066 ,  E02F9/2217 ,  E02F9/2246 ,  F02D29/04 ,  F15B1/04

    摘要： An object is to reduce a load acting on an engine upon starting up the engine such that the engine can be quickly started up to reliably feed pressure oil from a hydraulic pump to an accumulator. A hydraulic control system is provided with first accumulators (24,25) connected to a hydraulic pump (23) via a first line (28) and second accumulators (26,27) connected to a second line (29) branching from the first line (28), an on/off valve (32) arranged in the second line and interposed between the first line (28) and the second accumulators (26, 27), an operation detection device (41) for detecting whether or not a starter (22) is in an operation state, a rotational frequency detection device (a rotary encoder (47) and rotational frequency calculation device (43)) for detecting a rotational frequency of an engine (21), and a valve control device for, upon detection of the operation state of the starter (22) by the operation detection device (41), controlling a valve position of the on/off valve (32) at a closed position until the rotational frequency reaches an idling rotational frequency set beforehand but then controlling the valve position of the on/off valve (32) at a closed position.

    CONSTRUCTION MACHINE
    6.
    发明公开
    CONSTRUCTION MACHINE 审中-公开
    BAUMASCHINE

    公开(公告)号：EP3043050A4

    公开(公告)日：2017-05-17

    申请号：EP14842412

    申请日：2014-08-28

    申请人： YANMAR CO LTD

    发明人： NAKAGAKI MITSUHIRO ,  SHIROUZU TAKAYUKI ,  TANAKA KATASHI

    IPC分类号： F02D29/00 ,  E02F3/32 ,  E02F9/20 ,  E02F9/22 ,  F02D29/04 ,  F15B11/16

    CPC分类号： E02F9/2066 ,  E02F3/325 ,  E02F9/2235 ,  E02F9/2285 ,  E02F9/2296 ,  F02D29/00 ,  F02D29/04 ,  F15B11/165 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/6651

    摘要： An object is to provide a backhoe that is a construction machine that selects a mode for controlling an engine in accordance with a task, and can prevent an engine speed hunting of the engine by controlling a discharge amount of a hydraulic pump. In a backhoe (1) that is a construction machine in which a swash plate angle of a variable capacity hydraulic pump (29) driven by an engine (19) is controlled based on a difference (”N) between an actual engine speed (N) of the engine (19) and a target engine speed (Nt) calculated from an accelerator position (Sn), the engine (19) is controlled through isochronous control when the actual engine speed (N) of the engine (19) is equal to or higher than a maximum torque engine speed (Np) with which a maximum torque of the engine (19) is able to be output, and the engine (19) is controlled through droop control when the actual engine speed (N) of the engine (19) is lower than the maximum torque engine speed (Np) with which the maximum torque of the engine (19) is able to be output.

    摘要翻译： 本发明的目的在于提供一种反铲机，其是根据任务来选择用于控制发动机的模式并且能够通过控制液压泵的排出量来防止发动机转速波动的建筑机械。 在作为由发动机（19）驱动的可变容量型液压泵（29）的斜板角度基于实际发动机转速（N）的差（N）控制的作为建筑机械的反向铲（1） ）和从加速器位置（Sn）计算出的目标发动机速度（Nt）之间的差值，当发动机（19）的实际发动机速度（N）相等时，通过等时控制来控制发动机（19） （N）的实际发动机转速（N）达到或高于能够输出发动机（19）的最大转矩的最大转矩发动机转速（Np），并且通过下垂控制来控制发动机（19） 发动机（19）低于发动机（19）的最大扭矩能够输出的最大扭矩发动机转速（Np）。

    Apparatus and method for controlling engine revolutions for excavator
    7.
    发明公开
    Apparatus and method for controlling engine revolutions for excavator 审中-公开
    装置和方法的用于挖掘机的发动机转速的控制

    公开(公告)号：EP2060681A3

    公开(公告)日：2017-03-15

    申请号：EP08019562.1

    申请日：2008-11-08

    申请人： Volvo Construction Equipment Holding Sweden AB

    发明人： Yang, Hak Yong

    IPC分类号： E02F9/20 ,  E02F9/22 ,  B60W50/02 ,  E02F9/26

    CPC分类号： E02F9/2246 ,  B60W50/038 ,  E02F9/2066 ,  E02F9/2235 ,  E02F9/26 ,  E02F9/265

    摘要： An apparatus and method for controlling engine revolutions for an excavator is provided, which can set the excavator not to perform a normal operation so as to induce an operator to check an air cleaner (20) by reducing a flow rate of hydraulic fluid discharged from a hydraulic pump (60) through lowering of the engine revolutions if an operator disregards a warning signal for requiring the operator to check an engine intake system and continues the excavator work even when a predetermined time elapses after transfer of the warning signal or the warning signal is transferred over a predetermined number of times. The apparatus includes an engine (10) and a hydraulic pump (60), an air cleaner (20) for filtering out foreign substances included in outside air being inhaled into an engine combustion chamber, a pressure sensor (30), installed in a bypass between the air cleaner (20) and the engine combustion chamber, for detecting pressure of the air in the bypass, and an electronic control unit (40) for outputting a warning signal for requiring an operator to check the air cleaner (20) if the pressure signal exceeds a reference pressure value, and lowering the engine revolutions and reducing the flow rate from the hydraulic pump (60) if the operator disregards the warning signal and continues the excavator work after the transfer of the warning signal.