Energy recovering method and system in hydraulic lift device of battery operated industrial trucks
    1.
    发明授权
    Energy recovering method and system in hydraulic lift device of battery operated industrial trucks 有权
    电动工业卡车液压升降装置能量回收方法及系统

    公开(公告)号:US07770697B2

    公开(公告)日:2010-08-10

    申请号:US11663534

    申请日:2006-02-13

    IPC分类号: B66F9/22 F15B21/14 F16D31/02

    摘要: An energy recovering system in a hydraulic lift device of a battery operated industrial truck. With the system, working oil can be supplied to other hydraulic actuators while energy recovering operation is performed by the hydraulic lift device, occurrence of pressure pulsation in the working oil can be prevented, and energy recovering efficiency is increased. The hydraulic lift device comprises a lift cylinder (1) for lifting a fork F, an electric motor (4) rotated by power supply from a battery (5), a hydraulic pump (3) for supplying pressurized oil to the lift cylinder (1), a control valve (14) disposed in a pressurized oil supply path (23), and a controller (17). The controller (17) controls the opening of the control valve (14) and rotation speed of the electric motor (4) which functions as an electric generator driven by the hydraulic pump (3) rotated by the action of the pressurized oil returning from the lift cylinder (1) when a load is lowered so that the generated electricity charges the battery (5) to recover the potential energy of the load.

    摘要翻译: 电动工业车辆液压升降装置中的能量回收系统。 利用该系统,可以通过液压提升装置进行能量回收操作,将其加工到其他液压致动器,能够防止工作油中的压力脉动的发生,能量回收效率提高。 液压提升装置包括用于提升叉F的提升缸(1),通过从电池(5)供电而旋转的电动马达(4),用于向提升缸(1)供应加压油的液压泵 ),设置在加压供油路径(23)中的控制阀(14)和控制器(17)。 控制器(17)控制控制阀(14)的打开和作为由液压泵(3)驱动的发电机起作用的电动机(4)的旋转速度,其通过从 提升气缸(1),以使得发电对电池(5)充电以恢复负载的势能。

    Energy recovering system of hydraulic lift device for battery operated industrial trucks
    2.
    发明授权
    Energy recovering system of hydraulic lift device for battery operated industrial trucks 有权
    电动工业卡车液压升降装置能量回收系统

    公开(公告)号:US07770696B2

    公开(公告)日:2010-08-10

    申请号:US11663352

    申请日:2006-02-15

    IPC分类号: B66F9/22 F15B21/14 F16D31/02

    摘要: An energy recovering system of a hydraulic lift device for a battery operated industrial truck. With the system, working oil can be supplied to other hydraulic actuators while energy recovering operation is performed by the hydraulic lift device, and energy recovering efficiency is increased. A hydraulic motor (6) is disposed in a fluid path for recovering pressurized working fluid from a lift cylinder (1) via a control valve (10) to a working fluid reservoir tank (8) so that the hydraulic motor (6) is driven by the pressurized working fluid returning from the lift cylinder (1). The hydraulic motor (6) is connected to an electric motor (4) for driving a hydraulic pump (3), which supplies pressurized fluid to the lift cylinder (1), by means of a one-way clutch (7) which performs torque transmission only from the hydraulic motor (6) to the electric motor (4).

    摘要翻译: 一种用于电池操作的工业车辆的液压提升装置的能量回收系统。 使用该系统,可以通过液压提升装置进行能量回收操作,而将工作油供给到其他液压致动器,并且能量回收效率提高。 液压马达(6)设置在流体路径中,用于通过控制阀(10)从提升缸(1)回收加压工作流体到工作流体储存罐(8),使得液压马达(6)被驱动 通过从提升缸(1)返回的加压工作流体。 液压马达(6)连接到用于驱动液压泵(3)的电动马达(4),该液压泵通过执行扭矩的单向离合器(7)向提升缸(1)供应加压流体 仅从液压马达(6)到电动马达(4)的传动。

    Energy Recovering System of Hydraulic Lift Device for Battery Operated Industrial Trucks
    3.
    发明申请
    Energy Recovering System of Hydraulic Lift Device for Battery Operated Industrial Trucks 有权
    电动工业卡车液压升降装置能量回收系统

    公开(公告)号:US20070278048A1

    公开(公告)日:2007-12-06

    申请号:US11663352

    申请日:2006-02-15

    IPC分类号: B66F9/24

    摘要: An energy recovering system of a hydraulic lift device for a battery operated industrial truck. With the system, working oil can be supplied to other hydraulic actuators while energy recovering operation is performed by the hydraulic lift device, and energy recovering efficiency is increased. A hydraulic motor (6) is disposed in a fluid path for recovering pressurized working fluid from a lift cylinder (1) via a control valve (10) to a working fluid reservoir tank (8) so that the hydraulic motor (6) is driven by the pressurized working fluid returning from the lift cylinder (1). The hydraulic motor (6) is connected to an electric motor (4) for driving a hydraulic pump (3), which supplies pressurized fluid to the lift cylinder (1), by means of a one-way clutch (7) which performs torque transmission only from the hydraulic motor (6) to the electric motor (4).

    摘要翻译: 一种用于电池操作的工业车辆的液压提升装置的能量回收系统。 使用该系统,可以通过液压提升装置进行能量回收操作,而将工作油供给到其他液压致动器,并且能量回收效率提高。 液压马达(6)设置在流体路径中,用于通过控制阀(10)从提升缸(1)回收加压工作流体到工作流体储存罐(8),使得液压马达(6)被驱动 通过从提升缸(1)返回的加压工作流体。 液压马达(6)连接到用于驱动液压泵(3)的电动马达(4),该液压泵通过执行扭矩的单向离合器(7)向提升缸(1)供应加压流体 仅从液压马达(6)到电动马达(4)的传动。

    Forklift and Method of Controlling Safety Against Overturning for Forklift
    4.
    发明申请
    Forklift and Method of Controlling Safety Against Overturning for Forklift 审中-公开
    叉车控制铲车翻转安全的方法

    公开(公告)号:US20090057065A1

    公开(公告)日:2009-03-05

    申请号:US12086884

    申请日:2007-01-16

    IPC分类号: B66F9/20

    摘要: A forklift which is capable of controlling overturning and a method of controlling safety against overturning for a forklift are provided. In a forklift having a controller (20) for controlling the traveling state of a vehicle, the controller (20) is characterized by estimating the traveling state at a predetermined time ahead and, when the vehicle velocity at that time exceeds a maximum allowable vehicle velocity before generating a likelihood of overturning, applying the brakes and, when a no-overturning state is achieved thereafter, releasing the brakes.

    摘要翻译: 提供了能够控制翻倒的叉车以及控制叉车倾倒安全的方法。 在具有用于控制车辆的行驶状态的控制器(20)的叉车中,控制器(20)的特征在于,在前一预定时间估计行驶状态,并且当当时的车速超过最大允许车速 在产生翻转的可能性之前,施加制动器,并且当其后实现无翻转状态时,释放制动器。

    Industrial vehicle and power control method for the same
    8.
    发明申请
    Industrial vehicle and power control method for the same 有权
    工业车辆和动力控制方法相同

    公开(公告)号:US20080133077A1

    公开(公告)日:2008-06-05

    申请号:US11976903

    申请日:2007-10-29

    IPC分类号: B60K26/00

    摘要: The present invention provides an industrial vehicle having a hybrid system capable of readily controlling a distribution of power generated by an engine and power generated by an electric motor, and a method of controlling; the power of the same. A hybrid industrial vehicle includes an engine for supplying power to one of a running unit and a loading-and-unloading unit; a first motor for supplying power to one of the running unit and the loading-and-unloading unit; a second motor for supplying power to the running unit; a required-power calculating unit for calculating running power, and loading-and-unloading power; a clutch unit for controlling the power transmitted from the engine to the running unit; and a power-distribution calculating unit for selecting a destination to be supplied with power form the engine and the first motor based on the control status of the clutch unit, and for calculating a distribution of power which the engine, the first motor, and the second motor supply based on the calculated running power and loading-and-unloading power.

    摘要翻译: 本发明提供一种能够容易地控制由发动机产生的动力分配和由电动机产生的动力的混合动力系统的工业车辆及其控制方法。 权力一样。 混合动力工业车辆包括用于向运行单元和装卸单元中的一个供电的发动机; 用于向运行单元和装卸单元中的一个供电的第一电动机; 用于向所述运行单元供电的第二电动机; 用于计算运行功率的需求功率计算单元和装载和卸载功率; 离合器单元,用于控制从发动机传递到行驶单元的动力; 以及动力分配计算单元,用于基于离合器单元的控制状态从发动机和第一电动机中选择要供给动力的目的地,并且计算发动机,第一电动机和 基于计算的运行功率和装卸功率的第二电机供电。

    VEHICLE STEERING CONTROL DEVICE AND METHOD
    10.
    发明申请
    VEHICLE STEERING CONTROL DEVICE AND METHOD 有权
    车辆转向控制装置及方法

    公开(公告)号:US20110060503A1

    公开(公告)日:2011-03-10

    申请号:US12988097

    申请日:2009-04-09

    IPC分类号: B62D6/00

    CPC分类号: B62D6/008 B66F9/07568

    摘要: A steering control device for imparting a steering reactive force to the steering wheel. The steering control device for fork lifts determines a command steering reactive force corresponding to the wheel angle from the wheel angle detected by a wheel angle sensor (41) and table data (60) representing the correlation between the wheel angle and the command steering reactive force and controls an electric brake (31) so that the steering reactive force is equal to the command steering reactive force. A correction coefficient (α1) corresponding to a vehicle state quantity and so forth are determined from the vehicle state quantity (e.g., the wheel angle difference (Δθ)) other than the wheel angle detected by a vehicle state quantity detecting means (e.g., a steering wheel angle sensor (23)) and table data (52) representing the correlation between the vehicle state quantity and the correction coefficient. The table data (60) is corrected by using the correction coefficient (the inclination (α) is determined). The command steering reactive force corresponding to the wheel angle is determined from the table data (60) and the wheel angle. The electric brake (31) is controlled so that the steering reactive force is equal to the command steering reactive force.

    摘要翻译: 一种用于向方向盘施加转向反作用力的转向控制装置。 用于叉车升降机的转向控制装置根据由车轮角度传感器(41)检测到的车轮角度确定与车轮角度相对应的指令转向反作用力,以及表示车轮角度和指令转向反作用力之间的相关性的表格数据(60) 并且控制电动制动器(31),使得转向反作用力等于指令转向反作用力。 根据由车辆状态量检测装置检测到的车轮角以外的车辆状态量(例如,车轮角度差(&Dgr;& thetas;))来确定与车辆状态量等相对应的校正系数(α1) 例如方向盘角度传感器(23))和表示车辆状态量与校正系数之间的相关性的表格数据(52)。 通过使用校正系数(确定倾斜度(α))来校正表格数据(60)。 从车轮数据(60)和车轮角度确定与车轮角度对应的指示转向反作用力。 电动制动器(31)被控制成使得转向反作用力等于指令转向反作用力。