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    Steering method and steering system for tracklaying vehicle
    1.
    发明授权
    Steering method and steering system for tracklaying vehicle 有权

    公开(公告)号：US06474426B2

    公开(公告)日：2002-11-05

    申请号：US09814184

    申请日：2001-03-22

    申请人： Shigeru Yamamoto ,  Toshikazu Okada ,  Hisao Asada ,  Tomohiro Nakagawa ,  Ikuo Kita

    发明人： Shigeru Yamamoto ,  Toshikazu Okada ,  Hisao Asada ,  Tomohiro Nakagawa ,  Ikuo Kita

    IPC分类号： B62D1106

    CPC分类号： B62D11/183

    摘要： A steering method and steering system which enable a minimum turn radius more than the discharge capacities of a hydraulic motor and a hydraulic pump and which positively prevent the unstable traveling and turning behavior of a vehicle when the vehicle makes a pivot turn. The vehicle is provided with a pair of brakes for right and left output shafts and designed to transmit the driving force of the hydraulic motor to the output shafts through planetary gear mechanisms. During a pivot turn of the vehicle, an operation of the brake of either one of the right and left output shafts and a transmission of a driving force from the hydraulic motor to a planetary gear mechanism are simultaneously carried out for a specified period of time and thereafter, the transmission of the driving force from the hydraulic motor to the planetary gear mechanism is interrupted.

    Controlling device for hydraulically operated cooling fan
    2.
    发明授权
    Controlling device for hydraulically operated cooling fan 有权
    液压冷却风扇控制装置

    公开(公告)号：US06349882B1

    公开(公告)日：2002-02-26

    申请号：US09553156

    申请日：2000-04-20

    申请人： Ikuo Kita ,  Toshikazu Okada ,  Atsushi Uemura ,  Shigeru Yamamoto ,  Tomohiro Nakagawa

    发明人： Ikuo Kita ,  Toshikazu Okada ,  Atsushi Uemura ,  Shigeru Yamamoto ,  Tomohiro Nakagawa

    IPC分类号： F01P702

    CPC分类号： F01P7/044 ,  F01P5/043

    摘要： A controlling device for a hydraulically operated cooling fan capable of obtaining optimum cooling efficiency by continuously controlling a rotational frequency of the cooling fan according to a cooling water temperature, a hydraulic oil temperature, and an engine speed is provided. To this end, the controlling device includes a hydraulic motor (16) for driving a cooling fan (13), a variable displacement hydraulic pump (14) capable of controlling the rotational frequency of the hydraulic motor (16), a cooling water temperature sensor (21) for detecting a cooling water temperature (TW), a hydraulic oil temperature sensor (22) for detecting a hydraulic oil temperature (To), an engine speed sensor (23) for detecting an engine speed (E), and a controller (20) which inputs detected signals from these sensors (21, 22, 23), computes and outputs a discharge capacity command value of the variable displacement hydraulic pump (14) according to the inputted cooling water temperature (Tw), hydraulic oil temperature (To), and engine speed (E), and continuously controls a rotational frequency (N) of the cooling fan (13) by means of the variable displacement hydraulic pump (14).

    摘要翻译： 提供一种用于通过根据冷却水温度，液压油温度和发动机转速连续控制冷却风扇的转速来获得最佳冷却效率的液压冷却风扇的控制装置。 为此，控制装置包括用于驱动冷却风扇（13）的液压马达（16），能够控制液压马达（16）的转速的可变排量液压泵（14），冷却水温度传感器 用于检测冷却水温度（TW）的控制器（21），用于检测液压油温度（To）的液压油温度传感器（22），用于检测发动机转速（E）的发动机转速传感器（23） 输入来自这些传感器（21,22,23）的检测信号的输入端（20）根据输入的冷却水温度（Tw），液压油温度（Tw）计算并输出可变排量液压泵（14）的排出容量指令值 To）和发动机转速（E），并通过可变排量液压泵（14）连续地控制冷却风扇（13）的转速（N）。

    Control method and system for construction machine
    3.
    发明授权
    Control method and system for construction machine 有权
    施工机械控制方法及系统

    公开(公告)号：US5996701A

    公开(公告)日：1999-12-07

    申请号：US196184

    申请日：1998-11-20

    申请人： Toshihiko Fukasawa ,  Shigeru Yamamoto ,  Hisao Asada ,  Yasuo Fujiwara ,  Tomohiro Nakagawa

    发明人： Toshihiko Fukasawa ,  Shigeru Yamamoto ,  Hisao Asada ,  Yasuo Fujiwara ,  Tomohiro Nakagawa

    IPC分类号： E02F3/84 ,  E02F9/22 ,  F04B49/00

    CPC分类号： E02F9/2296 ,  E02F9/2235 ,  E02F9/2292

    摘要： An independent two pump system comprising an implement hydraulic pump and a steering hydraulic pump is described. The system has an inexpensive structure and the capability of preventing a construction machine from engine stalling without impairing fuel economy. When the implement hydraulic pump is actuated with the output of an engine to operate an implement attached to the construction machine, while actuating the steering hydraulic pump with the output of the engine to turn a vehicle body of the machine, the load exerted on the implement is detected and if the detected load is determined to exceed a preset value, the displacement of the steering hydraulic pump is reduced to thereby reduce the load associated with turning of the vehicle body.

    摘要翻译： 描述了包括工具液压泵和转向液压泵的独立的两个泵系统。 该系统具有廉价的结构和防止施工机器发动机停转而不损害燃料经济性的能力。 当工具液压泵用发动机的输出致动以操作附接到建筑机械的工具时，在用发动机的输出致动转向液压泵以转动机器的车身时，施加在工具上的负载 并且如果检测到的负载被确定为超过预设值，则转向液压泵的排量减小，从而减少与车身转向相关的负载。

    Vehicle control system
    4.
    发明授权
    Vehicle control system 有权
    车辆控制系统

    公开(公告)号：US07195580B2

    公开(公告)日：2007-03-27

    申请号：US10979922

    申请日：2004-11-01

    申请人： Masahiro Funato ,  Toshikazu Okada ,  Shigeru Yamamoto ,  Tomohiro Nakagawa

    发明人： Masahiro Funato ,  Toshikazu Okada ,  Shigeru Yamamoto ,  Tomohiro Nakagawa

    IPC分类号： B60W10/04

    CPC分类号： B60W10/06 ,  B60W10/115 ,  B60W30/18 ,  B60W2300/17 ,  B60W2710/0661 ,  B60W2710/0672 ,  B60W2710/1055 ,  B60W2720/10 ,  F16H47/04 ,  F16H61/46 ,  F16H61/468 ,  F16H2037/0866 ,  F16H2037/088 ,  F16H2200/2005 ,  Y10T477/675 ,  Y10T477/679 ,  Y10T477/688

    摘要： A vehicle control system which is capable of performing a quick decelerating operation in all vehicle speed regions and setting a direct region where power from an engine is transmitted through a mechanical transmission unit only in a hydro-mechanical transmission. The vehicle control system includes an engine and a hydro-mechanical transmission and is designed to set a tractive force-vehicle speed characteristic corresponding to the direct region where power transmission from the input shaft to the intermediate output shaft of the hydro-mechanical transmission is done by the mechanical transmission unit alone in a specified engine speed region. An engine control system controls the engine and a decelerator outputs a deceleration command according to an operating amount thereof. The engine control system controls the engine to reduce engine output torque corresponding to a specified engine speed region in response to the deceleration command.

    摘要翻译： 一种车辆控制系统，其能够在所有车辆速度区域中进行快速减速操作，并且仅在水力机械变速器中设置来自发动机的动力的直接区域通过机械传动单元传递。 车辆控制系统包括发动机和液力 - 机械变速器，并且被设计成设定与直接区域相对应的牵引力 - 车辆速度特性，其中从输入轴到水力发电机构的中间输出轴的动力传递完成 通过机械传动单元在指定的发动机转速区域中。 发动机控制系统控制发动机，减速器根据其运转量输出减速指令。 发动机控制系统响应于减速命令控制发动机以减小对应于指定发动机转速区域的发动机输出转矩。

    Transmission system for work vehicle
    9.
    发明授权
    Transmission system for work vehicle 有权
    工作车辆传动系统

    公开(公告)号：US07081068B2

    公开(公告)日：2006-07-25

    申请号：US10770552

    申请日：2004-02-04

    申请人： Tomohiro Nakagawa ,  Shigeru Yamamoto ,  Toshikazu Okada

    发明人： Tomohiro Nakagawa ,  Shigeru Yamamoto ,  Toshikazu Okada

    IPC分类号： F16H61/26

    CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/11 ,  B60W30/18 ,  B60W30/1819 ,  B60Y2200/221 ,  F16H61/0437 ,  F16H63/502 ,  F16H2306/48 ,  Y10T477/638 ,  Y10T477/693636 ,  Y10T477/69364

    摘要： A transmission system for a work vehicle, which is capable of reliably mitigating, with relatively simple arrangement, shocks caused by speed changes even in a work vehicle such as a bulldozer in which almost all operations are performed with the engine operating at full load. In the transmission system which converts the output torque of an engine into torque according to work load by operations for shifting speed gears through disengagement/engagement of friction clutches, if a downshift from a higher speed gear to a lower speed gear is effected while the engine operating at full load, the friction clutch controlling valves, controller and friction clutches allows the friction clutch corresponding to the higher speed gear to slide so as to enable power transmission and the engine controlling fuel injection system and controller allows the engine to perform high power operation (overload operation) during the sliding of the friction clutch.

    摘要翻译： 一种用于工作车辆的传动系统，其能够以相对简单的布置方式可靠地减轻即使在诸如推土机的工作车辆中引起的冲击，其中几乎所有的操作都是在发动机以满负荷运行的情况下执行的。 在通过用于通过摩擦离合器的分离/接合来移动速度齿轮的操作，根据工作负载将发动机的输出转矩转换为转矩的变速系统中，如果在发动机中实现从较高档位到低速档位的降档 摩擦离合器控制阀，控制器和摩擦离合器使摩擦离合器控制阀，控制器和摩擦离合器能够使与高速齿轮对应的摩擦离合器滑动，从而实现动力传递，并且发动机控制燃油喷射系统和控制器允许发动机执行高功率运行 （过载操作）。