公开(公告)号：US20140144129A1

公开(公告)日：2014-05-29

申请号：US13823255

申请日：2012-09-04

申请人： Atsushi Shirao ,  Takahisa Oasa ,  Shinichi Kitao

发明人： Atsushi Shirao ,  Takahisa Oasa ,  Shinichi Kitao

IPC分类号： F15B15/20

CPC分类号： F15B15/20 ,  F16H61/4061 ,  F16H61/431 ,  F16H61/438

摘要： A pump displacement control cylinder is configured to control the displacement of a hydraulic pump according to pressure of hydraulic fluid and switches the discharge direction of the hydraulic fluid from the hydraulic pump according to the supply direction of the hydraulic fluid to the pump displacement control cylinder. A forward and backward progression switching valve is configured to switch the supply direction of the hydraulic fluid to the pump displacement control cylinder. A pressure control valve is configured to control the pressure of the hydraulic fluid supplied to the pump displacement control cylinder according to a command value input to the pressure control valve. A control section is configured to execute pump shuttle control which reduces the command value to the pressure control valve when switching between forward and backward progression using a forward and backward progression operation member.

摘要翻译： 泵排量控制缸被配置为根据液压流体的压力来控制液压泵的排量，并且根据液压流体的供给方向将液压泵的排出方向从泵液位移控制缸切换。 前进和后退进给切换阀构造成将液压流体的供给方向切换到泵排量控制缸。 压力控制阀被配置为根据输入到压力控制阀的指令值来控制供给到泵排量控制缸的液压流体的压力。 控制部分被配置为执行泵往复运动控制，当使用向前和向后进行操作部件切换前进和后退进程时，减少对压力控制阀的指令值。

公开(公告)号：US08769945B2

公开(公告)日：2014-07-08

申请号：US13823255

申请日：2012-09-04

申请人： Atsushi Shirao ,  Takahisa Oasa ,  Shinichi Kitao

发明人： Atsushi Shirao ,  Takahisa Oasa ,  Shinichi Kitao

IPC分类号： F16D31/02

CPC分类号： F15B15/20 ,  F16H61/4061 ,  F16H61/431 ,  F16H61/438

摘要： A pump displacement control cylinder is configured to control the displacement of a hydraulic pump according to pressure of hydraulic fluid and switches the discharge direction of the hydraulic fluid from the hydraulic pump according to the supply direction of the hydraulic fluid to the pump displacement control cylinder. A forward and backward progression switching valve is configured to switch the supply direction of the hydraulic fluid to the pump displacement control cylinder. A pressure control valve is configured to control the pressure of the hydraulic fluid supplied to the pump displacement control cylinder according to a command value input to the pressure control valve. A control section is configured to execute pump shuttle control which reduces the command value to the pressure control valve when switching between forward and backward progression using a forward and backward progression operation member.

摘要翻译： 泵排量控制缸被配置为根据液压流体的压力来控制液压泵的排量，并且根据液压流体的供给方向将液压泵的排出方向从泵液位移控制缸切换。 前进和后退进给切换阀构造成将液压流体的供给方向切换到泵排量控制缸。 压力控制阀被配置为根据输入到压力控制阀的指令值来控制供给到泵排量控制缸的液压流体的压力。 控制部分被配置为执行泵往复运动控制，当使用向前和向后进行操作部件切换前进和后退进程时，减少对压力控制阀的指令值。

公开(公告)号：US08888657B2

公开(公告)日：2014-11-18

申请号：US13814782

申请日：2012-04-17

申请人： Shinichi Kitao ,  Atsushi Shirao

发明人： Shinichi Kitao ,  Atsushi Shirao

IPC分类号： F16H61/00 ,  F16H61/44 ,  E02F9/22 ,  E02F9/20 ,  F16H61/431 ,  F16H61/4035 ,  F16H61/444

CPC分类号： E02F9/2221 ,  E02F9/2079 ,  E02F9/2235 ,  E02F9/2253 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F16H61/4035 ,  F16H61/431 ,  F16H61/44 ,  F16H61/444 ,  Y10T477/73

摘要： A control apparatus of a working vehicle including a hydraulic pump driven by an engine and two hydraulic motors connected in parallel to the hydraulic pump, a clutch being released or engaged so that a power is transmitted to one of the hydraulic motors via the clutch, includes: a load detection unit determining a load of the working vehicle from a throttle output amount and an engine speed of the engine; and a control unit reducing a pump injection amount of the hydraulic pump under an upper limit injection amount of the hydraulic pump predetermined based on the load at a time of release shift control of the clutch and increasing a pump injection amount of the hydraulic pump under a lower limit injection amount of the hydraulic pump predetermined based on the load at a time of engagement shift control of the clutch.

摘要翻译： 一种工作车辆的控制装置，包括由发动机驱动的液压泵和与液压泵并联连接的两个液压马达，离合器被释放或接合，使得动力经由离合器传递到一个液压马达，包括 负载检测单元，根据发动机的节气门输出量和发动机转速确定作业车辆的载荷; 以及控制单元，在所述液压泵的上限喷射量下，基于所述离合器的释放变速控制时的负荷而预先确定的所述液压泵的泵喷射量，并且将所述液压泵的泵喷射量增加到 基于离合器的接合变速控制时的负荷而预先确定的液压泵的下限喷射量。

公开(公告)号：US20130136624A1

公开(公告)日：2013-05-30

申请号：US13814782

申请日：2012-04-17

申请人： Shinichi Kitao ,  Atsushi Shirao

发明人： Shinichi Kitao ,  Atsushi Shirao

IPC分类号： E02F9/22

CPC分类号： E02F9/2221 ,  E02F9/2079 ,  E02F9/2235 ,  E02F9/2253 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F16H61/4035 ,  F16H61/431 ,  F16H61/44 ,  F16H61/444 ,  Y10T477/73

摘要： A control apparatus of a working vehicle including a hydraulic pump driven by an engine and two hydraulic motors connected in parallel to the hydraulic pump, a clutch being released or engaged so that a power is transmitted to one of the hydraulic motors via the clutch, includes: a load detection unit determining a load of the working vehicle from a throttle output amount and an engine speed of the engine; and a control unit reducing a pump injection amount of the hydraulic pump under an upper limit injection amount of the hydraulic pump predetermined based on the load at a time of release shift control of the clutch and increasing a pump injection amount of the hydraulic pump under a lower limit injection amount of the hydraulic pump predetermined based on the load at a time of engagement shift control of the clutch.

摘要翻译： 一种工作车辆的控制装置，包括由发动机驱动的液压泵和与液压泵并联连接的两个液压马达，离合器被释放或接合，使得动力经由离合器传递到一个液压马达，包括 负载检测单元，根据发动机的节气门输出量和发动机转速确定作业车辆的载荷; 以及控制单元，在所述液压泵的上限喷射量下，基于所述离合器的释放变速控制时的负荷而预先确定的所述液压泵的泵喷射量，并且将所述液压泵的泵喷射量增加到 基于离合器的接合变速控制时的负荷而预先确定的液压泵的下限喷射量。

公开(公告)号：US09163386B2

公开(公告)日：2015-10-20

申请号：US13808755

申请日：2012-05-09

申请人： Atsushi Shirao

发明人： Atsushi Shirao

IPC分类号： E02F9/22 ,  B60W10/06 ,  B60W30/18 ,  F16H61/421 ,  F16H61/472 ,  B60K28/16 ,  B60W10/103

CPC分类号： E02F9/2246 ,  B60K28/165 ,  B60W10/06 ,  B60W10/103 ,  B60W30/18172 ,  B60W2510/0638 ,  B60W2540/10 ,  B60W2710/0644 ,  B60W2710/105 ,  F16H61/421 ,  F16H61/472

摘要： A work vehicle is provided with an engine, a hydraulic pump, a movement hydraulic motor, an acceleration operation member, and a control section. The hydraulic pump is driven by the engine. The movement hydraulic motor is driven by hydraulic fluid which is discharged from the hydraulic pump. The acceleration operation member is operated in order to set a target rotation speed for the engine. The control section is configured to perform traction control where the maximum traction force is reduced by limiting the displacement of the movement hydraulic motor to an upper limit displacement which is smaller than the maximum displacement. The control section increases the upper limit displacement of the movement hydraulic motor according to an increase in the operation amount of the acceleration operation member or the engine rotation speed in the traction control.

摘要翻译： 工作车辆设置有发动机，液压泵，移动液压马达，加速操作构件和控制部。 液压泵由发动机驱动。 运动液压马达由从液压泵排出的液压流体驱动。 操作加速操作构件以设定发动机的目标转速。 控制部构成为通过将移动液压马达的位移限制在小于最大排量的上限位移而进行最大牵引力的牵引力控制。 控制部根据加速操作构件的操作量的增加或牵引力控制中的发动机转速来增大移动式液压马达的上限位移。

公开(公告)号：US08974171B2

公开(公告)日：2015-03-10

申请号：US13318407

申请日：2010-05-11

申请人： Atsushi Shirao ,  Masanori Ikari

发明人： Atsushi Shirao ,  Masanori Ikari

IPC分类号： E02F3/43

CPC分类号： E02F3/432 ,  E02F3/433 ,  F15B2211/6336

摘要： A work vehicle includes a pair of booms, a link mechanism and a control unit. The booms are attached to a front part of a vehicle body in an upwardly and downwardly rotatable state. The link mechanism couples a working unit to tips of the booms. The link mechanism is configured to keep the working unit in a posture generally parallel to the ground without rotating the working unit with respect to the ground while the booms are elevated from a position where the working unit is disposed on the ground when the working unit is a fork. The control unit is configured to execute a tilt angle adjusting control for the working unit in accordance with variation in an angle of the booms while the booms are elevated when a tilt angle of the working unit is greater than or equal to a predetermined threshold.

摘要翻译： 工作车辆包括一对起重臂，连杆机构和控制单元。 动臂以向上和向下可旋转的状态附接到车身的前部。 连杆机构将工作单元耦合到吊杆的尖端。 连杆机构被构造成当工作单元是从工作单元设置在地面上的位置升高时，使工作单元保持大致平行于地面的姿态而不使工作单元相对于地面旋转 一把叉子。 控制单元被配置为当工作单元的倾斜角度大于或等于预定阈值时，根据悬臂的角度的变化来执行用于工作单元的倾斜角度调节控制，同时在悬臂升高时。

公开(公告)号：US08607919B2

公开(公告)日：2013-12-17

申请号：US13809514

申请日：2012-05-09

申请人： Atsushi Shirao ,  Hidehiro Hashimoto

发明人： Atsushi Shirao ,  Hidehiro Hashimoto

IPC分类号： B60K17/00

CPC分类号： F04B9/02 ,  B60W2510/1085 ,  F04B49/002 ,  F16H61/433 ,  F16H61/47 ,  F16H2059/6861

摘要： An upper limit speed control part controls the lower limit of motor displacement in conformance with the target upper limit speed via a motor displacement control part when the target upper limit speed is within the normal speed range. The upper limit speed control part controls the upper limit of pilot pressure via a pilot pressure control part in conformance with the target upper limit speed when the target upper limit speed is within the low speed range. Further, when the target upper limit speed is within the low speed range, the upper limit speed control part controls a pilot pressure valve such that the upper limit of pilot pressure increases as drive circuit pressure increases.

摘要翻译： 当目标上限速度在正常速度范围内时，上限速度控制部分经由电动机位移控制部分控制与目标上限速度一致的电动机位移的下限。 当目标上限速度在低速范围内时，上限速度控制部通过先导压力控制部按照目标上限速度来控制先导压力的上限。 此外，当目标上限速度在低速范围内时，上限速度控制部控制先导压力阀，使得先导压力的上限随着驱动回路压力的增加而增大。

公开(公告)号：US08548692B2

公开(公告)日：2013-10-01

申请号：US13393036

申请日：2010-09-15

申请人： Katsuyuki Morimoto ,  Motoki Ohba ,  Atsushi Shirao

发明人： Katsuyuki Morimoto ,  Motoki Ohba ,  Atsushi Shirao

IPC分类号： G06F7/70

CPC分类号： E02F9/2207 ,  E02F9/2217 ,  F15B21/008 ,  F15B2211/3116 ,  F15B2211/625 ,  F15B2211/8613

摘要： A travel vibration suppressing device is connected to a hydraulic cylinder for operating a work machine, and utilizes an accumulator to suppress vibration during travel of the vehicle. Upon determining that the state of the work machine is the excavating state, the control unit switches from a state of communication between a hydraulic cylinder and the accumulator to a blocked state when the vehicle speed changes from a speed exceeding a first speed to a speed equal to or less than the first speed. Upon determining that the operating state is the normal state, the state of communication between a boom cylinder and the accumulator is switched to the blocked state when the vehicle speed changes from a second speed lower than the first speed to a speed equal to or less than the second speed.

摘要翻译： 行驶振动抑制装置连接到用于操作作业机械的液压缸，并且利用蓄能器来抑制车辆行驶期间的振动。 当确定作业机的状态是挖掘状态时，当车速从超过第一速度的速度变为相等的速度时，控制单元从液压缸和蓄能器之间的通信状态切换到停止状态 达到或小于第一速度。 当确定操作状态是正常状态时，当车速从低于第一速度的第二速度改变到等于或小于等于的速度时，动臂缸和蓄能器之间的连通状态被切换到阻挡状态 第二速。

公开(公告)号：US20100009806A1

公开(公告)日：2010-01-14

申请号：US12439407

申请日：2007-08-28

申请人： Atsushi Shirao ,  Minoru Wada ,  Yuuya Kusumoto

发明人： Atsushi Shirao ,  Minoru Wada ,  Yuuya Kusumoto

IPC分类号： F16H61/42

CPC分类号： B60W10/06 ,  B60W30/188 ,  B60W2710/0644 ,  F16H47/02 ,  F16H59/44 ,  F16H61/421 ,  F16H61/435 ,  F16H61/448 ,  F16H61/47 ,  Y10T477/631

摘要： A construction vehicle includes an engine, a hydraulic pump driven by the engine, a travel hydraulic motor driven by pressure oil discharged from the hydraulic pump, travel wheels driven by the drive force of the travel hydraulic motor, and a controller. The controller is configured to control an engine speed, displacement of the hydraulic pump, and displacement of the travel hydraulic motor in order to control a vehicle speed and the traction force. The controller is further configured to increase a maximum displacement of the travel hydraulic motor as the vehicle speed decreases within a low speed range in which the vehicle speed is equal to or less than a predetermined threshold.

摘要翻译： 施工车辆包括发动机，由发动机驱动的液压泵，由从液压泵排出的压力油驱动的行驶液压马达，由行驶液压马达的驱动力驱动的行驶轮和控制器。 控制器被配置为控制发动机速度，液压泵的位移和行驶液压马达的位移，以便控制车速和牵引力。 该控制器进一步构造成在车速等于或小于预定阈值的低速范围内随着车速降低而增大行驶液压马达的最大位移。

公开(公告)号：US20140200775A1

公开(公告)日：2014-07-17

申请号：US13808755

申请日：2012-05-09

申请人： Atsushi Shirao

发明人： Atsushi Shirao

IPC分类号： E02F9/22

CPC分类号： E02F9/2246 ,  B60K28/165 ,  B60W10/06 ,  B60W10/103 ,  B60W30/18172 ,  B60W2510/0638 ,  B60W2540/10 ,  B60W2710/0644 ,  B60W2710/105 ,  F16H61/421 ,  F16H61/472

摘要： A work vehicle is provided with an engine, a hydraulic pump, a movement hydraulic motor, an acceleration operation member, and a control section. The hydraulic pump is driven by the engine. The movement hydraulic motor is driven by hydraulic fluid which is discharged from the hydraulic pump. The acceleration operation member is operated in order to set a target rotation speed for the engine. The control section is configured to perform traction control where the maximum traction force is reduced by limiting the displacement of the movement hydraulic motor to an upper limit displacement which is smaller than the maximum displacement. The control section increases the upper limit displacement of the movement hydraulic motor according to an increase in the operation amount of the acceleration operation member or the engine rotation speed in the traction control.

摘要翻译： 工作车辆设置有发动机，液压泵，移动液压马达，加速操作构件和控制部。 液压泵由发动机驱动。 运动液压马达由从液压泵排出的液压流体驱动。 为了设定发动机的目标转速，操作加速操作部件。 控制部构成为通过将移动液压马达的位移限制在小于最大排量的上限位移而进行最大牵引力的牵引力控制。 控制部根据加速操作构件的操作量的增加或牵引力控制中的发动机转速来增大移动式液压马达的上限位移。