-
公开(公告)号：US11572674B2
公开(公告)日：2023-02-07
申请号：US16979975
申请日：2019-09-24
发明人： Tetsuji Tanaka , Koji Hyodo , Yasunori Miyamoto , Isamu Aoki
摘要： Provided is a working vehicle capable of increasing lifting operation speed of a working device without increasing cost, even when provided with a circuit configuration that prioritizes a steering operation over a working device operation.
A wheel loader 1 comprises a priority valve 451 configured to allow hydraulic oil discharged from a hydraulic pump 41 to flow into a steering drive circuit 43 preferentially over a working device drive circuit 44, and further comprises: an electric steering lever 30; a pair of solenoid control valves 34A, 34B configured to control a steering directional control valve 33; and a controller 5. The controller 5 is configured to control the pair of solenoid control valves 34A, 34B so as to limit operation speed of a steering 3 when determining that an engine 40 is in a low idle state and a lift arm 21 is performing a lifting operation.-
公开(公告)号：US10947701B2
公开(公告)日：2021-03-16
申请号：US16980055
申请日：2019-09-24
发明人： Koji Hyodo , Tetsuji Tanaka , Isamu Aoki , Masaki Nukii , Yuki Ahiko
摘要： Provided is a working vehicle capable of, while reducing fuel consumption, improving traveling performance only when high traveling performance is required.
A wheel loader 1 comprises: an engine 3; a variable displacement HST pump 41; a variable displacement HST motor 42 connected to the HST pump 41 through a closed circuit; pressure sensors 72A, 72B configured to load pressure of the HST motor 42; and a controller 5, wherein the controller 5 is configured to, in a case of determining that a load pressure detection value P is included in a predetermined pressure range of greater than load pressure Pα corresponding to flat ground traveling and smaller than load pressure Pγ corresponding to an excavation operation, increase maximum rotational speed of the engine 3 only within the predetermined pressure range.-
公开(公告)号：US11891781B2
公开(公告)日：2024-02-06
申请号：US17251069
申请日：2019-03-13
发明人： Koji Hyodo , Fumihiro Nakao , Yasunori Miyamoto , Masaki Nukii
CPC分类号： E02F9/2253 , E02F3/283 , E02F9/02 , E02F9/2228 , E02F9/2292 , E02F9/2296 , F15B15/00 , E02F9/2285
摘要： A loading vehicle is capable of improving work efficiency by adjusting engine rotational speed with high accuracy in accordance with an operation state of the working device. An HST traveling driven wheel loader has an electrically controlled HST pump. A controller is configured to control input torque of the HST pump 31 and solenoid proportional pressure reducing valve is configured to generate control pressure for controlling displacement volume of the pump based on a control signal from the controller. The controller is configured to calculate the displacement volume q of the HST pump based on discharge pressure Pf of a loading hydraulic pump so that maximum input torque Thst of the HST pump decreases as the discharge pressure Pf or input torque of the loading hydraulic pump increases, and output a control signal corresponding to the calculated displacement volume q to the solenoid proportional pressure reducing valve.
-
公开(公告)号：US20140330490A1
公开(公告)日：2014-11-06
申请号：US14360963
申请日：2012-10-05
发明人： Isamu Aoki , Koji Hyodo , Tetsuji Tanaka , Keigo Kikuchi
IPC分类号： E02F3/43
CPC分类号： E02F3/431 , E02F9/2079 , E02F9/2207 , E02F9/2217 , E02F9/2253 , E02F9/265
摘要： Provided is a work vehicle which is capable of appropriately setting the height of a work tool as a control threshold value for a ride control device or an automatic transmission control device, and which is excellent in operability, travel stability, and work efficiency. A value detected by an angle sensor (39) when a signal import switch (46) is operated by an operator is stored in a height position storage unit (35b) of a main controller (35) as height position information about a bucket (13) for excavation work. In the height position storage unit (35b), the height position of the bucket (13) for hauling work and the height position of the bucket (13) for loading work are stored in advance as offset values from the height position information about the bucket (13) for excavation work. In this way, the ride control device or the automatic transmission control device can be appropriately controlled regardless of the preference or habit of the operator.
摘要翻译： 提供了能够适当地设定作业用工具的高度作为驾驶控制装置或自动变速器控制装置的控制阈值的作业车辆，其操作性，行驶稳定性和作业效率优异。 当操作者操作信号导入开关46时由角度传感器39检测到的值作为关于铲斗的高度位置信息（13）被存储在主控制器（35）的高度位置存储单元（35b）中 ）挖掘工作。 在高度位置存储单元（35b）中，作为用于牵引作业的铲斗（13）的高度位置和用于装载作业的铲斗（13）的高度位置作为从关于铲斗的高度位置信息的偏移值预先存储 （13）挖掘工作。 以这种方式，无论操作者的偏好或习惯如何，都可以适当地控制行驶控制装置或自动变速器控制装置。
-
公开(公告)号：US20140288787A1
公开(公告)日：2014-09-25
申请号：US14358582
申请日：2012-11-15
发明人： Koji Hyodo , Tetsuji Tanaka , Isamu Aoki , Keigo Kikuchi
IPC分类号： B60W10/02 , B60W10/184
CPC分类号： B60W10/02 , B60W10/184 , B60W30/18109 , B60W2510/182 , B60W2540/10 , F16D48/06 , F16D2500/10412 , F16D2500/111 , F16D2500/1112 , F16D2500/30806 , F16D2500/3108 , F16D2500/31426 , F16D2500/3144 , F16D2500/70404 , F16D2500/70406 , F16D2500/7041 , F16D2500/70424
摘要： A clutch control device for a work vehicle includes a determination unit that determines as to whether or not a clutch cutoff condition has been established based upon whether or not the accelerator pedal is being operated, as determined by the accelerator pedal operation determination unit, the vehicle speed of the work vehicle detected by the vehicle speed detection unit and the braking force of the work vehicle detected by the braking force detection unit; and a clutch control unit that controls engagement/release of a clutch so as to release the clutch when the determination unit determines that the clutch cutoff condition has been established.
摘要翻译： 一种用于作业车辆的离合器控制装置，包括：确定单元，其基于由加速器踏板操作确定单元确定的加速踏板是否正在操作来确定离合器切断条件是否已被建立，车辆 由车速检测单元检测到的作业车辆的速度和由制动力检测单元检测到的作业车辆的制动力; 以及离合器控制单元，其在确定单元确定离合器切断条件已经建立时，控制离合器的接合/释放，以释放离合器。
-
公开(公告)号：US12031299B2
公开(公告)日：2024-07-09
申请号：US17638391
申请日：2021-03-08
发明人： Koji Hyodo , Yasunori Miyamoto , Masaki Nukii
IPC分类号： F16H59/44 , E02F9/22 , F16H59/26 , F16H61/425 , F16H61/47
CPC分类号： E02F9/2253 , F16H59/26 , F16H59/44 , F16H61/425 , F16H61/47
摘要： Provided is a work vehicle capable of attaining a maximum vehicle speed specification value set in advance for each vehicle body even in the case where a device constituting an HST traveling drive system has deteriorated over time. In a wheel loader 1 equipped with an HST traveling drive system, a controller 5 is configured to, in the case where a detection pressure value P is equal to or less than a switching pressure value Ps corresponding to a switching point in the HST motor 42 between a maximum displacement volume qmax and a minimum displacement volume qmin, and a detection vehicle speed value V is less than an upper limit vehicle speed specification value Vmaxs, limit the minimum displacement volume qmin of the HST motor 42 to a first minimum displacement volume value qmin1 less than a minimum displacement volume specification value qmins that is associated with the upper limit vehicle speed specification value Vmaxs.
-
公开(公告)号：US12012725B2
公开(公告)日：2024-06-18
申请号：US17273844
申请日：2018-09-28
发明人： Koji Hyodo , Masaki Yoshikawa , Tetsuji Tanaka , Masaki Nukii
CPC分类号： E02F9/2246 , E02F3/3417 , E02F3/422 , E02F3/431 , E02F9/2289
摘要： Provided is a loading work vehicle capable of improving work efficiency even when working on a slippery road surface. An HST-traveling-drive wheel loader 1 comprises a step-on amount detection sensor 610, a discharge pressure detection sensor 75, a mode switch device 60, and a controller 5. The controller 5 is configured to: determine whether a limit mode is selected by the mode switch device 60; specify an operation state of the wheel loader 1 when determining that the limit mode is selected; limit maximum traction force to a first set value which is set based on a static friction coefficient μ and vehicle weight when specifying that a bucket 23 is pushed into a natural ground 100; and increase the maximum traction force from the first set value when specifying that excavation of the natural ground 100 is started.
-
公开(公告)号：US11371213B2
公开(公告)日：2022-06-28
申请号：US16640437
申请日：2018-12-26
发明人： Koji Hyodo , Tetsuji Tanaka , Isamu Aoki , Kouji Shimazaki , Jumpei Kamiya
摘要： Provided is a wheel loader capable of moving up a lift arm in a short time during excavation work. A wheel loader comprises a controller configured to control maximum traction force of the wheel loader and input torque of a working device hydraulic pump, and include a specific condition determination section configured to determine whether a specific condition for specifying excavation work is satisfied, an elapsed time measurement section configured to measure an elapsed time from start of the excavation work, and an input torque control section configured to limit the input torque to a first input torque value when the specific condition is satisfied and increase the input torque from the first input torque value when a second set time elapses from the elapse of a first set time.
-
公开(公告)号：US11180901B2
公开(公告)日：2021-11-23
申请号：US16640257
申请日：2019-03-15
发明人： Koji Hyodo , Tetsuji Tanaka , Isamu Aoki , Kouji Shimazaki
摘要： A work vehicle is provided. The work vehicle is capable of notifying an operator of a state close to overheating of a temperature of a cooling oil that cools a brake device before the temperature overheats. A controller (10) in a work vehicle (100) compares each detection value detected from a brake pressure sensor (26) and a vehicle speed sensor (15) to each threshold (V1, P1, R1) predetermined corresponding to each sensor. The controller (10) outputs a warning command that a temperature of a cooling oil is likely to overheat to a notification device (28) when a state that at least one detection value is equal to or more than the threshold and when a state that at least one detection value is equal to or more than the threshold continues for a first duration (t1) or more.
-
公开(公告)号：US10773590B2
公开(公告)日：2020-09-15
申请号：US15754300
申请日：2017-02-08
发明人： Masaki Nukii , Koji Hyodo , Isamu Aoki , Tetsuji Tanaka
IPC分类号： B60K17/10 , B60W10/06 , B60W10/103 , B60W10/30 , F01N3/08 , F02D29/04 , B60W10/04 , F02D31/00 , F02D41/02 , F01N9/00 , F01N3/20 , F01N11/00
摘要： The present invention relates to a work vehicle including an engine, a hydraulic pump, a hydraulic motor to drive wheels, an HST circuit in which the hydraulic pump and the hydraulic motor are connected to each other in the form of a closed circuit, a reducing agent sensor that detects the state of a reducing agent used to clean exhaust gas from the engine, and an engine restrictor that restricts the rotational speed of the engine based on the output from the reducing agent sensor, and the work vehicle further includes a control unit that changes the tilting angle of the hydraulic pump or the hydraulic motor independently of the rotational speed of the engine to a tilting angle associated with minimum travel drive force necessary for self-travel of the work vehicle when the control unit determines that the engine restrictor has restricted the rotational speed of the engine.
-
-
-
-
-
-
-
-
-
搜索结果
22 条记录 (耗时 0.017 秒)
