公开(公告)号：US20170145659A1

公开(公告)日：2017-05-25

申请号：US15415999

申请日：2017-01-26

申请人： KOMATSU LTD.

发明人： Masao YOSHIZAWA ,  Shunsuke MIYAMOTO ,  Kenichi YAMADA

IPC分类号： E02F9/20 ,  E02F3/43 ,  E02F9/22 ,  B60W30/188 ,  B60K6/445 ,  F04B49/12 ,  B60W10/30 ,  E02F3/42 ,  F15B11/10 ,  F04B17/05 ,  F04B49/20 ,  E02F3/34 ,  B60W10/06

CPC分类号： B60W30/1888 ,  B60K6/445 ,  B60K25/02 ,  B60K2025/026 ,  B60W10/06 ,  B60W10/30 ,  B60W30/1886 ,  B60W2300/17 ,  B60Y2200/415 ,  E02F3/34 ,  E02F3/422 ,  E02F3/431 ,  E02F9/202 ,  E02F9/2029 ,  E02F9/2066 ,  E02F9/2075 ,  E02F9/2079 ,  E02F9/2246 ,  E02F9/2253 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F04B17/05 ,  F04B49/06 ,  F04B49/12 ,  F04B49/20 ,  F15B11/10 ,  F15B2211/426 ,  F15B2211/605 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/7052 ,  F15B2211/75 ,  Y02T10/6239 ,  Y10S903/903

摘要： A work vehicle is equipped with an engine, a hydraulic pump, a work implement, a work implement operating member, a work implement control valve, a capacity control device, a travel device, an accelerator operating member, and a control unit. The hydraulic pump is driven by the engine. The work implement is driven by hydraulic fluid discharged from the hydraulic pump. The work implement control valve controls the hydraulic pressure supplied to the work implement. The capacity control device controls a differential pressure between a discharge pressure of the hydraulic pump and an outlet hydraulic pressure of the work implement control valve. The travel device is driven by the engine. The accelerator operating member changes the engine rotation speed. The control unit causes the speed of the work implement to increase by causing the engine rotation speed to increase when an operation amount of the work implement operating member is increased.

公开(公告)号：US20160167647A1

公开(公告)日：2016-06-16

申请号：US14903651

申请日：2015-01-14

申请人： KOMATSU LTD.

发明人： Kenichi YAMADA ,  Shunsuke MIYAMOTO

IPC分类号： B60W30/02 ,  E02F3/28 ,  B60W10/18 ,  E02F9/20 ,  B60W10/30 ,  B60W10/10

CPC分类号： B60W30/02 ,  B60W10/10 ,  B60W10/18 ,  B60W10/30 ,  B60W2300/17 ,  B60W2540/10 ,  B60W2710/10 ,  B60W2710/18 ,  B60W2710/30 ,  B60Y2200/415 ,  E02F3/283 ,  E02F9/202 ,  E02F9/2079 ,  F16H59/18 ,  F16H59/44 ,  F16H59/48 ,  F16H59/54 ,  F16H61/0437

摘要： A control unit in a work vehicle executes an automatic downshift for shifting a speed range of a transmission to the speed range at a lower speed than a current speed range. The control unit determines the execution of the automatic downshift on the basis of automatic downshift conditions. The automatic downshift conditions include whether the operating amount of the accelerator operating member is equal to or greater than a predetermined accelerator threshold, whether the vehicle speed is less than a predetermined speed threshold, and whether the acceleration is equal to or less than a predetermined acceleration threshold.

摘要翻译： 工作车辆中的控制单元执行自动降档，以将变速器的速度范围以比当前速度范围低的速度移动到速度范围。 控制单元基于自动降档条件来确定自动降档的执行。 自动换档条件包括加速器操作构件的操作量是否等于或大于预定加速器阈值，车速是否小于预定速度阈值，加速度是否等于或小于预定加速度 阈。

公开(公告)号：US20160145836A1

公开(公告)日：2016-05-26

申请号：US14889200

申请日：2014-12-09

申请人： KOMATSU LTD.

发明人： Kenichi YAMADA ,  Masao YOSHIZAWA

IPC分类号： E02F9/22 ,  E02F9/20 ,  E02F3/28

CPC分类号： E02F9/2246 ,  B60K6/387 ,  B60K6/445 ,  B60K2006/381 ,  B60W10/06 ,  B60W10/30 ,  B60W30/1886 ,  E02F3/283 ,  E02F9/202 ,  E02F9/2066 ,  E02F9/2235 ,  E02F9/2253 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F02D29/00 ,  F02D29/04 ,  F02D29/06 ,  F15B11/02 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/50518 ,  F15B2211/5151 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/6654 ,  Y02T10/6239

摘要： A transmission requirement setting unit sets a required traction force in a work vehicle on the basis of an accelerator operation amount. A work implement requirement setting unit sets a required flow rate on the basis of a work implement operation amount. An engine requirement setting unit determines the horsepower required from the engine on the basis of the horsepower required by the transmission set on the basis of the required traction force, and the horsepower required by the work implement set on the basis of the required flow rate. A required throttle setting unit determines a commanded throttle value sent to the engine on the basis of the horsepower required from the engine. A pump displacement setting unit sets a target displacement for the hydraulic pump on the basis of the required flow rate. The work implement requirement setting unit sets an upper limit for the required flow rate to a prescribed flow rate limit value when the discharge pressure of the hydraulic pump is at or above a prescribed pressure threshold.

摘要翻译： 变速器要求设定单元基于加速器操作量来设定作业车辆中的所需牵引力。 工作实施要求设定部基于工作作业量设定所需的流量。 发动机要求设定单元根据所需的牵引力，根据所需的牵引力，基于所述变速器组所需的马力，根据所需的流量，决定所述发动机所需的马力，以及所述作业机构所要求的马力。 所需的节气门设定单元基于从发动机所需的马力确定发送到发动机的指令油门值。 泵排量设定单元根据要求的流量设定液压泵的目标排量。 当液压泵的排出压力在规定的压力阈值以上时，作业要求设定单元将所需流量的上限设定为规定的流量极限值。

公开(公告)号：US20160121900A1

公开(公告)日：2016-05-05

申请号：US14892647

申请日：2014-12-16

申请人： KOMATSU LTD.

发明人： Masao YOSHIZAWA ,  Shunsuke MIYAMOTO ,  Kenichi YAMADA

IPC分类号： B60W30/188 ,  B60W10/06 ,  B60W10/30 ,  B60K25/02

CPC分类号： B60W30/1888 ,  B60K6/445 ,  B60K25/02 ,  B60K2025/026 ,  B60W10/06 ,  B60W10/30 ,  B60W30/1886 ,  B60W2300/17 ,  B60Y2200/415 ,  E02F3/34 ,  E02F3/422 ,  E02F3/431 ,  E02F9/202 ,  E02F9/2029 ,  E02F9/2066 ,  E02F9/2075 ,  E02F9/2079 ,  E02F9/2246 ,  E02F9/2253 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F04B17/05 ,  F04B49/06 ,  F04B49/12 ,  F04B49/20 ,  F15B11/10 ,  F15B2211/426 ,  F15B2211/605 ,  F15B2211/6651 ,  F15B2211/6652 ,  F15B2211/7052 ,  F15B2211/75 ,  Y02T10/6239 ,  Y10S903/903

摘要： A work vehicle is equipped with an engine, a hydraulic pump, a work implement, a travel device, an accelerator operating member, a work implement operating member, and a control unit. The hydraulic pump is driven by the engine. The work implement is driven by hydraulic fluid discharged from the hydraulic pump. The travel device is driven by the engine. The accelerator operating member changes the engine rotation speed. The work implement operating member operates the work implement. The control unit causes the speed of the work implement to increase by causing the engine rotation speed to increase when an operation amount of the work implement operating member is increased.

摘要翻译： 工作车辆配备有发动机，液压泵，作业工具，行驶装置，加速器操作构件，作业工具操作构件和控制单元。 液压泵由发动机驱动。 工作装置由液压泵排出的液压油驱动。 旅行装置由发动机驱动。 加速器操作构件改变发动机转速。 工作实施操作人员操作工作工具。 当工作装置操作构件的操作量增加时，通过使发动机转速增加，控制单元使工件的速度增加。

公开(公告)号：US20220196148A1

公开(公告)日：2022-06-23

申请号：US17603713

申请日：2020-06-08

申请人： KOMATSU LTD.

发明人： Shogo MIYAZAKI ,  Shinya KAWAKITA ,  Kenichi YAMADA

IPC分类号： F16H61/475 ,  F16H61/00 ,  F16H61/4017

摘要： A power transmission device includes an input shaft, an output shaft, a differential device, a continuously variable transmission unit, and a control device. The differential device includes a first rotation element connected to the input shaft, a second rotation element connected to the output shaft, and a third rotation element. The continuously variable transmission unit includes a conversion unit configured to convert rotational power of the third rotation element into an other power, and a reconversion unit configured to reconvert the converted other power into the rotational power and supply the reconverted rotational power to the output shaft. The control device includes a continuously variable transmission control unit configured to generate a control signal of the continuously variable transmission unit such that the other power generated by the conversion unit exceeds the other power input to the reconversion unit.

公开(公告)号：US20170274896A1

公开(公告)日：2017-09-28

申请号：US15622321

申请日：2017-06-14

申请人： KOMATSU LTD.

发明人： Kenichi YAMADA ,  Shunsuke MIYAMOTO

IPC分类号： B60W30/02 ,  B60W10/10 ,  B60W10/18 ,  B60W10/30 ,  E02F3/28 ,  E02F9/20 ,  F16H61/04 ,  F16H59/18 ,  F16H59/44 ,  F16H59/48 ,  F16H59/54

CPC分类号： B60W30/02 ,  B60W10/10 ,  B60W10/18 ,  B60W10/30 ,  B60W2300/17 ,  B60W2540/10 ,  B60W2710/10 ,  B60W2710/18 ,  B60W2710/30 ,  B60Y2200/415 ,  E02F3/283 ,  E02F9/202 ,  E02F9/2079 ,  F16H59/18 ,  F16H59/44 ,  F16H59/48 ,  F16H59/54 ,  F16H61/0437

摘要： A control unit in a work vehicle executes an automatic downshift for shifting a transmission from a current speed range to a speed range that is lower than the current speed range when at least a first condition, a second condition, a third condition, and a fourth condition are satisfied. The first condition is that an operating amount of an accelerator operating member of the work vehicle is equal to or greater than a predetermined accelerator threshold. The second condition is that a vehicle speed of the work vehicle is less than a predetermined speed threshold. The third condition is that a vehicle acceleration of the work vehicle is equal to or less than a predetermined acceleration threshold. The fourth condition is that that the hydraulic pressure of a hydraulic fluid supplied to a brake device of the work vehicle is less than a predetermined brake threshold.

公开(公告)号：US20150337877A1

公开(公告)日：2015-11-26

申请号：US14759039

申请日：2014-09-03

申请人： KOMATSU LTD.

发明人： Shunsuke MIYAMOTO ,  Kenichi YAMADA ,  Yasunori OHKURA ,  Yasuki Kishimoto ,  Masao YOSHIZAWA

IPC分类号： F15B21/00 ,  F15B1/02

CPC分类号： F15B21/001 ,  B60K6/12 ,  B60K6/365 ,  B60K6/387 ,  B60K6/445 ,  B60K6/547 ,  B60K2006/381 ,  B60L7/18 ,  B60L11/14 ,  B60L11/18 ,  B60L11/1861 ,  B60L2200/40 ,  B60L2240/12 ,  B60L2240/421 ,  B60L2260/26 ,  B60W10/06 ,  B60W10/08 ,  B60W10/10 ,  B60W10/115 ,  B60W10/26 ,  B60W20/00 ,  B60W20/10 ,  B60W30/18045 ,  B60W2300/17 ,  B60W2710/0666 ,  B60W2710/083 ,  E02F9/202 ,  E02F9/2079 ,  F15B1/02 ,  F15B2201/00 ,  F16H3/66 ,  F16H3/72 ,  F16H3/728 ,  F16H2037/101 ,  F16H2200/2007 ,  F16H2200/2041 ,  Y02T10/6208 ,  Y02T10/6239 ,  Y02T10/6282 ,  Y02T10/6286 ,  Y02T10/642 ,  Y02T10/7005 ,  Y02T10/7044 ,  Y02T10/705

摘要： The target input shaft torque determination unit determines a target input shaft torque. The target output shaft torque determination unit determines a target output shaft torque so that a deceleration force for decelerating the vehicle is generated on the output shaft of the power transmission device in a state in which connection and disconnection states of the forward travel clutch and the reverse travel clutch are maintained at the state before the start of the shuttle action when the shuttle action is started. The torque-balance information is stored in a storage unit and defines a relationship between the target input shaft torque and the target output shaft torque to achieve a balance of the torques of a power transmission device. The command torque determination unit uses the torque-balance information to determine torque commands for the motor from the target input shaft torque and the target output shaft torque.

摘要翻译： 目标输入轴转矩确定单元确定目标输入轴转矩。 目标输出轴转矩确定单元确定目标输出轴扭矩，使得在前进行驶离合器和倒车的连接和断开状态的状态下，在动力传递装置的输出轴上产生用于减速的减速力 行驶离合器保持在穿梭动作开始前的状态。 转矩平衡信息存储在存储单元中，并且定义目标输入轴转矩和目标输出轴转矩之间的关系，以实现动力传递装置的转矩的平衡。 指令转矩确定单元使用转矩平衡信息，从目标输入轴转矩和目标输出轴转矩来确定电动机的转矩指令。

公开(公告)号：US20220220704A1

公开(公告)日：2022-07-14

申请号：US17605742

申请日：2020-06-08

申请人： KOMATSU LTD.

发明人： Kenichi YAMADA ,  Hiroaki IKEDA

IPC分类号： E02F9/22 ,  F16H59/44 ,  F16H59/54 ,  F16H61/4017 ,  F16H59/68

摘要： A work vehicle includes a power source, a travel device, a power transmission device, and a control device. The power transmission device includes a hydrostatic continuously variable transmission having a relief valve capable of setting a relief pressure, and is configured to transmit power of the power source to the travel device. The control device includes a relief pressure setting unit configured to set the relief pressure of the relief valve in accordance with a target output value of the travel device.

公开(公告)号：US20210372089A1

公开(公告)日：2021-12-02

申请号：US17289423

申请日：2019-11-07

申请人： KOMATSU LTD.

发明人： Kenichi YAMADA ,  Shogo MIYAZAKI ,  Akira TAKENO ,  Shota YAMAWAKI

IPC分类号： E02F9/22 ,  E02F9/20 ,  F16H61/4008 ,  F16H61/4157 ,  F16H61/472 ,  F15B15/18 ,  F04D13/02 ,  F04D15/00

摘要： A control device for a power machine includes a target circuit pressure specifying unit configured to specify a target circuit pressure of the hydrostatic continuously variable transmission, a measurement value acquisition unit configured to acquire an actual circuit pressure of the hydrostatic continuously variable transmission, a brake torque determination unit configured to determine a brake torque based on the target circuit pressure and the actual circuit pressure, and a pump control unit configured to control the hydraulic pump based on the brake torque. The brake torque is a torque consumed by the hydraulic pump.

公开(公告)号：US20220090359A1

公开(公告)日：2022-03-24

申请号：US17420157

申请日：2020-03-06

申请人： KOMATSU LTD.

发明人： Yuita TAKENAKA ,  Kenichi YAMADA

IPC分类号： E02F9/22 ,  E02F9/20 ,  B60W30/188 ,  B60W10/06 ,  B60W10/10

摘要： A work machine includes an engine, a travel drive system, a work implement, an apparatus drive system with a hydraulic pump, an accelerator operating member, a work implement operating member, and a controller. The controller controls the apparatus drive system in accordance with an operating amount of the work implement operating member. The controller determines a target tractive force of the travel drive system based on an operating amount of the accelerator operating member. The controller determines an allowable acceleration of the work machine. The controller determines an upper limit of tractive force of the travel drive system based on the allowable acceleration. The controller corrects the target tractive force so as to be equal to or less than the upper limit when the target tractive force is greater than the upper limit. The controller controls the travel drive system based on the corrected target tractive force.