Torque control apparatus for construction machine three-pump system
    1.
    发明授权
    Torque control apparatus for construction machine three-pump system 有权
    施工机械三泵系统扭矩控制装置

    公开(公告)号:US08371117B2

    公开(公告)日:2013-02-12

    申请号:US12159265

    申请日:2007-09-07

    IPC分类号: F16D31/02

    摘要: Torque control for a construction machine three-pump system that can accurately control the total absorption torque of first, second, and third hydraulic pumps and effectively use the output torque of an engine. A pump base torque computation section 42 calculates a pump base torque Tr from a target rotation speed. A subtraction section 44 calculates a reference value Tf for the maximum absorption torque available to the first and second hydraulic pumps 2, 3 by subtracting a third pump reference absorption torque T3r from the pump base torque Tr. A correction torque computation section 45 calculates a correction torque value from the delivery pressure of the third hydraulic pump 4. An addition section 46 calculates a target absorption torque Tn by adding the correction torque value Tm to the reference value Tf. A first regulator 31 is controlled so as to obtain the target absorption torque Tn.

    摘要翻译: 施工机械三泵系统的扭矩控制可以精确控制第一,二,三液压泵的总吸收转矩,有效地利用发动机的输出转矩。 泵基转矩运算部42根据目标转速​​来计算泵基转矩Tr。 减法部分44通过从泵基本扭矩Tr减去第三泵参考吸收转矩T3r来计算第一和第二液压泵2,3的可用的最大吸收扭矩的参考值Tf。 校正扭矩计算部45根据第三液压泵4的输出压力来计算修正转矩值。加法部46通过将校正转矩值Tm与基准值Tf相加来计算目标吸收转矩Tn。 控制第一调节器31以获得目标吸收扭矩Tn。

    TORQUE CONTROL APPARATUS FOR CONSTRUCTION MACHINE THREE-PUMP SYSTEM
    2.
    发明申请
    TORQUE CONTROL APPARATUS FOR CONSTRUCTION MACHINE THREE-PUMP SYSTEM 有权
    施工机械三泵系统扭矩控制装置

    公开(公告)号:US20100218493A1

    公开(公告)日:2010-09-02

    申请号:US12159265

    申请日:2007-09-07

    IPC分类号: F16D31/02

    摘要: Torque control for a construction machine three-pump system that can accurately control the total absorption torque of first, second, and third hydraulic pumps and effectively use the output torque of an engine. A pump base torque computation section 42 calculates a pump base torque Tr from a target rotation speed. A subtraction section 44 calculates a reference value Tf for the maximum absorption torque available to the first and second hydraulic pumps 2, 3 by subtracting a third pump reference absorption torque T3r from the pump base torque Tr. A correction torque computation section 45 calculates a correction torque value from the delivery pressure of the third hydraulic pump 4. An addition section 46 calculates a target absorption torque Tn by adding the correction torque value Tm to the reference value Tf. A first regulator 31 is controlled so as to obtain the target absorption torque Tn.

    摘要翻译: 施工机械三泵系统的扭矩控制可以精确控制第一,二,三液压泵的总吸收转矩,有效地利用发动机的输出转矩。 泵基转矩运算部42根据目标转速​​来计算泵基转矩Tr。 减法部分44通过从泵基本扭矩Tr减去第三泵参考吸收转矩T3r来计算第一和第二液压泵2,3的可用的最大吸收扭矩的参考值Tf。 校正扭矩计算部45根据第三液压泵4的输出压力来计算修正转矩值。加法部46通过将校正转矩值Tm与基准值Tf相加来计算目标吸收转矩Tn。 控制第一调节器31以获得目标吸收扭矩Tn。

    Pump control apparatus for construction machine
    3.
    发明授权
    Pump control apparatus for construction machine 有权
    施工机械泵控制装置

    公开(公告)号:US08006491B2

    公开(公告)日:2011-08-30

    申请号:US12282591

    申请日:2008-01-22

    IPC分类号: F15B11/02 E02F99/22

    摘要: On the basis of reference torque and torque correction amount output units (T1 and T2), a torque control command pressure is calculated so that the input torques of first and second pumps are increased. The calculated torque command instruction pressure is then supplied as external command pressure to the varying mechanism of a regulator used for the first and second pumps so as to prevent the input torques of the first and second pumps from being decreased more than necessary. As a result, even when three variable displacement hydraulic pumps are used with the discharge pressure of one of the hydraulic pumps reduced by a pressure reducing valve and further the input torques of the other two hydraulic pumps are decreased by that pressure, the engine output can be efficiently utilized, and the work rate does not decrease.

    摘要翻译: 基于参考扭矩和扭矩校正量输出单元(T1和T2),计算转矩控制指令压力,使得第一和第二泵的输入转矩增加。 然后将计算出的转矩指令指令压力作为外部指令压力提供给用于第一和第二泵的调节器的变化机构,以防止第一和第二泵的输入转矩减小到超过所需的压力。 结果,即使使用三个可变排量液压泵,其中一个液压泵的排出压力由减压阀减小,另外两个液压泵的输入转矩也减小了该压力,发动机输出可以 有效利用,工作率不降低。

    PUMP CONTROL APPARATUS FOR CONSTRUCTION MACHINE
    4.
    发明申请
    PUMP CONTROL APPARATUS FOR CONSTRUCTION MACHINE 有权
    建筑机械泵控制装置

    公开(公告)号:US20090044528A1

    公开(公告)日:2009-02-19

    申请号:US12282591

    申请日:2008-01-22

    IPC分类号: F16D31/02

    摘要: On the basis of reference torque and torque correction amount output units (T1 and T2), a torque control command pressure is calculated so that the input torques of first and second pumps are increased. The calculated torque command instruction pressure is then supplied as external command pressure to the varying mechanism of a regulator used for the first and second pumps so as to prevent the input torques of the first and second pumps from being decreased more than necessary. As a result, even when three variable displacement hydraulic pumps are used with the discharge pressure of one of the hydraulic pumps reduced by a pressure reducing valve and further the input torques of the other two hydraulic pumps are decreased by that pressure, the engine output can be efficiently utilized, and the work rate does not decrease.

    摘要翻译: 基于参考扭矩和扭矩校正量输出单元(T1和T2),计算转矩控制指令压力,使得第一和第二泵的输入转矩增加。 然后将计算出的转矩指令指令压力作为外部指令压力提供给用于第一和第二泵的调节器的变化机构,以防止第一和第二泵的输入转矩减小到超过所需的压力。 结果,即使使用三个可变排量液压泵,其中一个液压泵的排出压力由减压阀减小,另外两个液压泵的输入转矩也减小了该压力,发动机输出可以 有效利用,工作率不降低。

    Control system for hydraulic construction machine
    5.
    发明授权
    Control system for hydraulic construction machine 有权
    液压施工机械控制系统

    公开(公告)号:US07584611B2

    公开(公告)日:2009-09-08

    申请号:US11632474

    申请日:2005-11-18

    IPC分类号: F16D31/02

    摘要: When a mode selection command selects an economy mode, a mode selector 700e is turned on and outputs an engine revolution speed modification value ΔN0 (ΔN1=ΔN0) computed by an engine-revolution-speed modification value computing section 700d. A subtracter 700f subtracts the engine revolution speed modification value ΔN1 from a rated target revolution speed Nmax, thereby computing a target engine revolution speed NR2. The computing section 700d computes the engine revolution speed modification value ΔN0 depending on a pump delivery pressure mean value Pm. In a table stored in a memory, the relationship between Pm and ΔN0 is set such that when Pm is not higher than PA near a midpoint pressure, ΔN0 is 0 and when Pm exceeds PA, ΔN0 is increased with an increase of Pm. Thus, the revolution speed of a prime mover is reduced by mode selection so as to improve fuel economy.

    摘要翻译: 当模式选择命令选择经济模式时,模式选择器700e被接通并输出由发动机转速修正值计算部700d计算的发动机转速修正值DeltaN0(DeltaN1 = DeltaN0)。 减速器700f从额定目标转速Nmax中减去发动机转速修正值DeltaN1,从而计算目标发动机转速NR2。 计算部700d根据泵输送压力平均值Pm计算发动机转速修正值DeltaN0。 在存储在存储器中的表中,设定Pm和DeltaN0之间的关系,使得当Pm不高于中点附近的PA时,DeltaN0为0,当Pm超过PA时,ΔN0随着Pm的增加而增加。 因此,通过模式选择来减少原动机的转速,以提高燃油经济性。

    Control System For Hydraulic Construction Machine
    7.
    发明申请
    Control System For Hydraulic Construction Machine 有权
    液压工程机械控制系统

    公开(公告)号:US20080072588A1

    公开(公告)日:2008-03-27

    申请号:US11632474

    申请日:2005-11-18

    IPC分类号: F15B9/00

    摘要: When a mode selection command selects an economy mode, a mode selector 700e is turned on and outputs an engine revolution speed modification value ΔN0 (ΔN1=ΔN0) computed by an engine-revolution-speed modification value computing section 700d. A subtracter 700f subtracts the engine revolution speed modification value ΔN1 from a rated target revolution speed Nmax, thereby computing a target engine revolution speed NR2. The computing section 700d computes the engine revolution speed modification value ΔN0 depending on a pump delivery pressure mean value Pm. In a table stored in a memory, the relationship between Pm and ΔN0 is set such that when Pm is not higher than PA near a midpoint pressure, ΔN0 is 0 and when Pm exceeds PA, ΔN0 is increased with an increase of Pm. Thus, the revolution speed of a prime mover is reduced by mode selection so as to improve fuel economy.

    摘要翻译: 当模式选择命令选择经济模式时,模式选择器700e被接通并输出由发动机转速修正值计算部700d计算的发动机转速修正值DeltaN 0(DeltaN 1 = DeltaN 0)。 减速器700f从额定目标转速Nmax中减去发动机转速修正值DeltaN 1,从而计算目标发动机转速NR 2。 计算部700d根据泵送出压力平均值Pm计算发动机转速修正值DeltaN 0。 在存储在存储器中的表中,Pm和DeltaN 0之间的关系被设置为使得当Pm不高于接近中点压力的PA时,DeltaN 0为0,并且当Pm超过PA时,DeltaN 0随着Pm的增加而增加 。 因此,通过模式选择来减少原动机的转速,以提高燃油经济性。

    Engine Lag Down Suppressing Device of Construction Machinery
    8.
    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)。

    Control system for hydraulic construction machine
    9.
    发明授权
    Control system for hydraulic construction machine 有权
    液压施工机械控制系统

    公开(公告)号:US07543448B2

    公开(公告)日:2009-06-09

    申请号:US10585983

    申请日:2005-10-05

    IPC分类号: F16D31/02

    摘要: A computing section computes a reference revolution-speed decrease modification amount DNLR; and multiplies an engine revolution speed modification gain KNL by a reference revolution-speed decrease modification amount DNL and then DNLR, to thereby compute an engine revolution-speed decrease modification amount DND based on input change of an operation pilot pressure, which is modified in accordance with DNLR. At the time when a lever operation input from an operation command unit is changed from full stroke to half stroke, if a pump delivery pressure is in a pressure range of a pump absorption torque control region Y where the pump delivery pressure is lower than that in a region X, the reference revolution-speed decrease modification amount computing section 700v computes the modification amount DNLR to be 0, and therefore lowering of a target engine revolution speed with auto-acceleration control is not caused.

    摘要翻译: 计算部分计算参考转速降低修改量DNLR; 并且将发动机转速修正增益KNL乘以基准转速下降修正量DNL,然后乘以DNLR,由此基于根据操作先导压力的输入变化计算发动机转速降低修正量DND 与DNLR。 当从操作指令单元输入的杠杆操作从全行程改变为半行程时,如果泵输送压力处于泵吸收转矩控制区域Y的压力范围内,其中泵输送压力低于 区域X,参考转速降低修正量计算部700v将修正量DNLR计算为0,因此不会引起自动加速控制的目标发动机转速的降低。