Engine Lag Down Suppressing Device of Construction Machinery
    1.
    发明申请
    Engine Lag Down Suppressing Device of Construction Machinery 有权
    发动机减速机施工机械

    公开(公告)号:US20080236157A1

    公开(公告)日:2008-10-02

    申请号:US10569490

    申请日:2004-08-27

    IPC分类号: F16D31/00

    摘要: An engine lag down suppressing device of construction machinery, comprising a vehicle body controller (13) having a first torque control means and a second torque control means, and a third torque control means. The first torque control means controls a torque control valve (7) to the minimum pump torque (value: Min) according to a target engine rotational speed (Nr) when the operating device (5) in the non-operated state of an continues for a monitoring time (TX1) to suppress an engine lag down after a specified holing time to hold a torque to a low pump torque is passed when the operating device in the non-operated state is operated. The second torque control means controls the torque control valve (7) to hold the minimum pump torque for a specified holding time (Tx2) after the operating device (5) in the non-operated state is operated. The third torque control means comprises a solenoid valve (16) and controls the torque control valve (7) to gradually increase the pump torque with elapse of time from a time when the specified holding time (TX2) is passed based on a specified torque increasing rate (K).

    摘要翻译: 一种工程机械的发动机减速装置,包括具有第一转矩控制装置和第二转矩控制装置的车体控制器(13)和第三转矩控制装置。 当处于非操作状态的操作装置(5)持续时,第一扭矩控制装置根据目标发动机转速(Nr)将转矩控制阀(7)控制到最小泵扭矩(值:Min) 当处于非操作状态的操作装置被操作时,通过在指定的启动时间之后抑制发动机滞后的监视时间(TX 1),以将扭矩保持在低的泵转矩。 在操作非操作状态的操作装置(5)之后,第二转矩控制装置控制转矩控制阀(7)将最小泵转矩保持在指定的保持时间(Tx 2)。 第三转矩控制装置包括电磁阀(16),并且控制转矩控制阀(7),以便在从指定的保持时间(TX2)通过指定的转矩时起经过时间逐渐增加泵的转矩 增加率(K)。

    Engine control system for construction machine
    2.
    发明授权
    Engine control system for construction machine 有权
    施工机械发动机控制系统

    公开(公告)号:US07255088B2

    公开(公告)日:2007-08-14

    申请号:US10527418

    申请日:2004-06-24

    IPC分类号: F02D41/04 F02D41/14

    CPC分类号: F02D31/007 F02D41/12

    摘要: An engine control system includes pressure sensors (73, 74), position sensors (75, 76), pressure sensors (77, 78), a target revolution speed modification value computing unit (90), and a modification value adder (70r). A target revolution speed NR2 for use in control is computed based on changes of status variables such that the target revolution speed NR2 increases from the target revolution speed NR1 applied from an input unit (71), and then moderately returns to the target revolution speed NR1. In accordance with the computed target revolution speed NR2 for use in control, a target fuel injection amount FN1 is computed and a fuel injection amount is controlled. As a result, a drop of an engine revolution speed attributable to an abrupt increase of an engine load can be suppressed without sacrificing the work efficiency, and lowering of durability caused by an excessive increase of the engine revolution speed can be prevented.

    摘要翻译: 发动机控制系统包括压力传感器(73,74),位置传感器(75,76),压力传感器(77,78),目标转速修正值计算单元(90)和修正值加法器(70r) 。 根据状态变量的变化,计算目标转速NR2,使得目标转速NR2从从输入单元(71)施加的目标转速NR 1增加,然后适度返回到目标 转速NR 1。 根据用于控制的计算出的目标转速NR2,计算目标燃料喷射量FN1,并控制燃料喷射量。 结果,可以在不牺牲工作效率的情况下抑制由于发动机负载突然增加引起的发动机转速的下降,并且可以防止由于发动机转速过大而导致的耐久性降低。

    Method and device for controlling pump torque for hydraulic construction machine
    4.
    发明授权
    Method and device for controlling pump torque for hydraulic construction machine 有权
    液压施工机械泵扭矩控制方法及装置

    公开(公告)号:US08162618B2

    公开(公告)日:2012-04-24

    申请号:US10507888

    申请日:2003-11-18

    IPC分类号: F04B49/00 F16D31/02

    摘要: A current load rate of an engine 10 is computed and a maximum absorption torque of at least one hydraulic pump 1, 2 is controlled so that the load rate is held at a target value. Engine stalling can be prevented by decreasing the maximum absorption torque of the hydraulic pump under a high-load condition. When an engine output lowers due to environmental changes, the use of poor fuel or other reasons, the maximum absorption torque of the hydraulic pump can be decreased without a lowering of the engine revolution speed. Further, the present invention is adaptable for any kinds of factors causing a lowering of the engine output, such as those factors that cannot be predicted in advance or are difficult to detect by sensors. In addition, because of no necessity of sensors, such as environment sensors, the manufacturing cost can be reduced.

    摘要翻译: 计算发动机10的当前负载率,并且控制至少一个液压泵1,2的最大吸收转矩,使得负载率保持在目标值。 通过在高负载条件下减小液压泵的最大吸收扭矩可以防止发动机失速。 当发动机输出由于环境变化而降低时,使用不良燃料或其他原因,可以降低液压泵的最大吸收扭矩而不降低发动机转速。 此外,本发明适用于导致发动机输出降低的各种因素,例如预先不能预测或难以被传感器检测的那些因素。 此外,由于不需要诸如环境传感器的传感器,因此可以降低制造成本。

    Engine control system for construction machine
    5.
    发明申请
    Engine control system for construction machine 有权
    施工机械发动机控制系统

    公开(公告)号:US20060118082A1

    公开(公告)日:2006-06-08

    申请号:US10527418

    申请日:2004-06-24

    IPC分类号: F02D31/00

    CPC分类号: F02D31/007 F02D41/12

    摘要: An engine control system includes pressure sensors (73, 74), position sensors (75, 76), pressure sensors (77, 78), a target revolution speed modification value computing unit (90), and a modification value adder (70r). A target revolution speed NR2 for use in control is computed based on changes of status variables such that the target revolution speed NR2 increases from the target revolution speed NR1 applied from an input unit (71), and then moderately returns to the target revolution speed NR1. In accordance with the computed target revolution speed NR2, a target fuel injection amount FN1 is computed and a fuel injection amount is controlled. As a result, a drop of an engine revolution speed attributable to an abrupt increase of an engine load can be suppressed without sacrificing the work efficiency, and lowering of durability caused by an excessive increase of the engine revolution speed can be prevented.

    摘要翻译: 发动机控制系统包括压力传感器(73,74),位置传感器(75,76),压力传感器(77,78),目标转速修正值计算单元(90)和修正值加法器(70r) 。 根据状态变量的变化,计算目标转速NR2,使得目标转速NR2从从输入单元(71)施加的目标转速NR 1增加,然后适度地返回到目标 转速NR1。根据计算出的目标转速NR 2,计算目标燃料喷射量FN1,并控制燃料喷射量。 结果,可以在不牺牲工作效率的情况下抑制由于发动机负载突然增加引起的发动机转速的下降,并且可以防止由于发动机转速过大而导致的耐久性降低。

    Working machine
    7.
    发明授权
    Working machine 有权
    工作机

    公开(公告)号:US08429904B2

    公开(公告)日:2013-04-30

    申请号:US12818433

    申请日:2010-06-18

    IPC分类号: F01N3/00 F01N3/02

    摘要: Disclosed is a working machine capable of preventing damage to a filter due to excessive accumulation of particulate matter (PM), even under a situation that requires, prior to compulsory regeneration of the filter, moving the machine to a place in which to perform the regeneration work. The working machine that includes an exhaust treatment device 4 having a filter 6 to trap the PM, a regeneration control section 31 for compulsorily regenerating the filter, and a regeneration instruction device 23 for instructing the regeneration control section 31 to start the compulsory regeneration. Further, when a deposition quantity estimating element determines that an actual PM deposition quantity has reached a deposition alarm level, an alarm device 12 notifies an operator that the time has come to start the movement of the working machine to the place of regeneration.

    摘要翻译: 公开了一种能够防止由于颗粒物质(PM)的过度积聚而导致的过滤器的损坏的作业机械,即使在强制再生过滤器之前,也需要将机器移动到进行再生的地方 工作。 包括具有用于捕集PM的过滤器6的废气处理装置4的工作机,用于强制再生过滤器的再生控制部31,以及用于指示再生控制部31开始强制再生的再生指示装置23。 此外,当沉积量估计元件确定实际的PM沉积量已经达到沉积报警水平时,报警装置12通知操作者现在是开始将工作机器移动到再生地点的时间。

    Auto-acceleration system for prime mover of hydraulic construction
machine and control system for prime mover and hydraulic pump
    8.
    发明授权
    Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump 有权
    液压工程机械原动机自动加速系统,原动机和液压泵控制系统

    公开(公告)号:US5930996A

    公开(公告)日:1999-08-03

    申请号:US164365

    申请日:1998-10-01

    摘要: In the arm-crowding or track operation, a calculating portion (700d2 or 700d4) calculates a modification gain (KAC or KTR) depending on an operation pilot pressure and a calculating portion (700g) calculates a decrease modification (DND) based on the KAC or KTR, while a calculating portion (700m or 700p) calculates a modification gain (KACH or KTRH) depending on an operation pilot pressure and calculating portions (700q-700s) calculate an increase modification (DNH) based on the KACH or KTRH. A reference target engine revolution speed NR0 is modified using the DND and DNH. In other operations than the arm-crowding and track operations, NR0 is modified using only the decrease modification (DND) calculated from the modification gain just depending on the operation pilot pressure. In the operation where an engine revolution speed is desired to become higher as an actuator load increases, the engine revolution speed can be controlled in accordance with change of the actuator load as well. In other operations, the engine revolution speed can be controlled just depending on the direction and input amount in and by which corresponding operation instructing apparatus is operated.

    摘要翻译: 在手臂拥挤或轨道操作中,计算部分(700d2或700d4)根据操作先导压力计算修正增益(KAC或KTR),并且计算部分(700g)基于KAC计算减小修改(DND) 或KTR,而计算部分(700m或700p)根据操作先导压力计算修正增益(KACH或KTRH),并且计算部分(700q-700s)基于KACH或KTRH计算增加修改(DNH)。 使用DND和DNH修改参考目标发动机转速NR0。 在除了拥挤和跟踪操作之外的其他操作中,NR0仅使用根据操作先导压力从修改增益计算的减少修改(DND)进行修改。 在致动器负载增加时希望发动机转速变高的操作中,也可以根据致动器负载的变化来控制发动机转速。 在其他操作中,可以根据相应的操作指示装置的操作方向和输入量来控制发动机转速。