专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US4813235A Hydraulic gain reduction circuit 失效
标题翻译：液压增益减小电路
公开(公告)号：US4813235A
公开(公告)日：1989-03-21
申请号：US60150
申请日：1987-06-09
申请人： James A. Miller
发明人： James A. Miller
IPC分类号： F04B49/00 , F04B49/08 , F15B11/00 , F16H61/42 , F16H61/433 , F16H61/46 , F16H61/468 , F16D31/02
CPC分类号： F16H61/468 , F04B49/08 , F16H61/433 , F16H61/46
摘要： A gain reduction circuit is provided for use with a pressure flow compensated variable displacement pump in a power-on-demand hydraulic system. An orifice and a check valve are connected in parallel between a pressure-flow compensating valve and the control for the variable displacement pump. A second orifice is connected between the pump control and sump. A relief valve is connected in parallel with both orifices. The circuit operates to allow a quick increase in pump output, while damping variations in the pump control to prevent or minimize oscillation of the pump outlet pressure around the desired value. In alternative embodiments, the check valve may be omitted if larger orifices are used, or the check valve may be provided and the second orifice omitted.
摘要翻译：提供增益减小电路用于电力需求液压系统中的压力流量补偿可变排量泵。节流阀和止回阀并联连接在压力流量补偿阀和可变排量泵的控制器之间。第二个孔连接在泵控制和油槽之间。安全阀与两个孔并联连接。该电路操作以允许泵输出的快速增加，同时泵控制中的阻尼变化来防止或最小化泵出口压力围绕期望值的振荡。在替代实施例中，如果使用更大的孔，则可以省略止回阀，或者可以提供止回阀并省略第二孔。

22. 发明授权

US4600364A Fluid operated pump displacement control system 失效
标题翻译：流体泵排量控制系统
公开(公告)号：US4600364A
公开(公告)日：1986-07-15
申请号：US621555
申请日：1984-06-18
申请人： Tohru Nakatani , Teruo Akiyama
发明人： Tohru Nakatani , Teruo Akiyama
IPC分类号： F04B49/00 , F04B49/08 , F16H61/46 , F16H61/468
CPC分类号： F16H61/468 , F04B49/002 , F04B49/08 , F16H61/46 , F04B2201/1201 , F04B2201/1202 , F04B2201/1204
摘要： A control system for a variable displacement pump or pumps driven by a vehicular engine for supplying pressurized fluid to implement actuators via implement control valves. The engine has several output conditions each with a different output torque characteristic. The control system includes a servomechanism comprising a servoactuator section coupled to the pump for varying the per cycle displacement thereof, a servovalve section for operating the servoactuator section by fluid pressure from a fixed displacement pump, and a control section for actuating the servovalve section. The servomechanism control section is fluid operated from a torque control valve, which delivers a controlled degree of fluid pressure from the fixed displacement pump to the control section in order to correspondingly vary the torque requirement of the variable displacement pump. The torque control valve is solenoid operated from a controller in association with a sensor capable of sensing each output condition in which the engine operates, in such a way that the torque requirement of the pump is controlled to suit the sensed output condition of the engine. The servomechanism control section is further under the control of a drain sensor effective to control the pump displacement in accordance with the flow rate of the fluid being drained from the implement control valves.
摘要翻译：用于可变排量泵的控制系统或由车辆发动机驱动的泵，用于供应加压流体以通过工具控制阀实施致动器。发动机具有多个输出条件，每个具有不同的输出转矩特性。控制系统包括伺服机构，其包括联接到泵的用于改变其每个循环位移的伺服致动器部分，用于通过来自固定排量泵的流体压力操作伺服驱动部分的伺服阀部分和用于致动伺服阀部分的控制部分。伺服机构控制部分由转矩控制阀流体操作，该转矩控制阀将可控程度的流体压力从固定排量泵传递到控制部分，以便相应地改变可变排量泵的转矩要求。扭矩控制阀由与能够检测发动机运行的每个输出状态的传感器相关联的控制器电磁操作，使得泵的扭矩需求被控制以适合于感测到的发动机的输出状态。伺服机构控制部进一步在排水传感器的控制下，有效地根据从工具控制阀排出的流体的流量来控制泵的排量。

23. 发明授权

US3716987A Power transmission 失效
标题翻译：电力传输
公开(公告)号：US3716987A
公开(公告)日：1973-02-20
申请号：US3716987D
申请日：1971-09-22
申请人： SPERRY RAND CORP
发明人： LONNEMO K
IPC分类号： B60K17/10 , B60W10/04 , B60W10/10 , B60W10/12 , F02D29/00 , F16H61/42 , F16H61/423 , F16H61/433 , F16H61/46 , F16H61/468 , F02B41/00
CPC分类号： F16H61/433 , F02D29/00 , F02D2700/07 , F16H61/423 , F16H61/46 , F16H61/468
摘要： A hydrostatic transmission using a variable displacement pump is driven by an internal combustion engine and has a control system wherein a single pedal or lever controls both the engine throttle and pump displacement. The position of the pedal or control lever determines both the throttle opening and the input torque to the hydrostatic transmission. The control automatically varies the pump displacement to maintain the selected input torque against the momentary load conditions on the hydraulic motor in accordance with the torque-speed characteristics of the engine. The control utilizes a hydraulic bridge circuit, having in its feedback leg, a pair of laminar flow restrictions varied in accordance with the position of the pump displacement regulator.
摘要翻译：使用可变排量泵的静液传动由内燃机驱动，并且具有控制系统，其中单个踏板或杆控制发动机节气门和泵排量。踏板或控制杆的位置确定节气门开度和静液压传动的输入扭矩。该控制自动地改变泵的位移，以根据发动机的扭矩 - 速度特性来保持所选择的输入扭矩与液压马达上的瞬时负载条件。该控制利用一个液压桥接电路，其在其反馈支路中具有根据泵位移调节器的位置而变化的一对层流限制。

24. 发明授权

US3213618A Method of regulating the input torque of a rotating barrel and plungers type hydraulic transmission 失效
标题翻译：调节旋转筒和柱塞式液压传动的输入扭矩的方法
公开(公告)号：US3213618A
公开(公告)日：1965-10-26
申请号：US35531064
申请日：1964-03-27
申请人： CITROEN SA ANDRE
发明人： JEAN CADIOU
IPC分类号： B60K17/10 , F01B3/10 , F04B49/00 , F04B49/08 , F16H61/423 , F16H61/46 , F16H61/468
CPC分类号： B60K17/10 , F01B3/106 , F04B49/002 , F04B49/08 , F16H61/423 , F16H61/46 , F16H61/468

25. 发明授权

US3101627A Transmission systems and controls therefor 失效
标题翻译：传动系统及其控制
公开(公告)号：US3101627A
公开(公告)日：1963-08-27
申请号：US83426959
申请日：1959-08-17
申请人： MORGAN DEV LAB INC
发明人： LINSLEY DOUGLAS F , MILLER JR HARRY J
IPC分类号： F16H47/04 , F16H61/46 , F16H61/468
CPC分类号： F16H47/04 , F16H61/46 , F16H61/468 , F16H2037/088 , Y10T477/636

26. 发明公开

US20240035565A1 Method and System for Controlling the Acceleration of a Vehicle 审中-公开
公开(公告)号：US20240035565A1
公开(公告)日：2024-02-01
申请号：US18217384
申请日：2023-06-30
申请人： J.C. Bamford Excavators Limited
发明人： Thomas George Sutton , Lawrence Lyndon Helmick
IPC分类号： F16H61/468 , F16H61/472
CPC分类号： F16H61/468 , F16H61/472 , F16H59/48
摘要： A method for controlling the acceleration of a vehicle includes: receiving a demand for acceleration from an operator input device; applying an initial transmission ratio to provide a vehicle acceleration whilst maintaining a current engine speed; and applying a loading transmission ratio to increase the output from the engine, wherein the loading transmission ratio is determined using the vehicle acceleration.

27. 发明授权

US11125327B2 Work vehicle and control method for work vehicle 有权
公开(公告)号：US11125327B2
公开(公告)日：2021-09-21
申请号：US16476619
申请日：2018-05-29
申请人： KOMATSU LTD.
发明人： Takahisa Oasa
IPC分类号： F16H61/431 , E02F9/22 , F16H59/36 , F16H59/68 , F16H61/472 , F16H61/468
摘要： A work vehicle includes an engine, a traveling pump driven by the engine, a hydraulic circuit connected to the traveling pump, a traveling motor connected to the traveling pump via the hydraulic circuit, a rotational speed sensor configured to output a signal indicative of engine speed a hydraulic pressure sensor configured to output a signal indicative of hydraulic pressure of the hydraulic circuit, a controller. The controller receives the signals from the rotational speed sensor and the hydraulic pressure sensor. The controller determines whether the engine is in an over-rotation state based on engine speed. The controller determines an upper limit value of a displacement of the traveling pump based on hydraulic pressure of the hydraulic circuit. The controller limits the displacement of the traveling pump to the upper limit value or less upon determining that the engine is in the over-rotation state.

28. 发明授权

US10851892B2 Method of estimating torque in a continuously variable transmission 有权
公开(公告)号：US10851892B2
公开(公告)日：2020-12-01
申请号：US16305354
申请日：2017-06-12
申请人： Perkins Engines Company Limited
发明人： Michael Beyer
IPC分类号： F16H61/66 , F16H61/468 , F16H61/472 , F16H63/50 , F16H59/70 , F16H37/08 , F16H59/36
摘要： A method is provided for estimating input torque and output torque in a continuously variable transmission having a variator. The method comprising the steps of determining (202) a transmission Input and/or output speed, calculating (204) the speed of each of a plurality of transmission components by reflecting the transmission input and/or output speed through the transmission to each of the plurality of transmission components, and calculating (208) the speed rate of change of each of the plurality of transmission components. The inertia torque of each of the plurality of transmission components is calculated (210) based upon its respective speed rate of change and a predetermined component inertia value (209). The method further comprises the steps of determining (211) a motor torque of the variator, and calculating (212) a transmission input torque and transmission output torque by reflecting the motor torque of the variator through the transmission to the transmission input and output. The calculated transmission Input and output torque values are adjusted (214) to account for the calculated inertia torque values of those of the plurality of transmission components which lie between the variator and the transmission input, and the variator and the transmission output, respectively.

29. 发明授权

US10544861B2 Hydrostatic transmission assembly and system 有权
公开(公告)号：US10544861B2
公开(公告)日：2020-01-28
申请号：US15315560
申请日：2015-06-02
申请人： Project Phoenix, LLC
发明人： Thomas Afshari
IPC分类号： F16H61/47 , F16H61/4035 , F16H61/4061 , F16H39/36 , F16H61/4008 , F16H61/468
摘要： A hydrostatic transmission system includes a fluid-driven motor and an integrated pump assembly connected to the fluid-driven motor to provide fluid to operate the fluid-driven motor. The integrated pump assembly includes a pump with at least one fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The hydrostatic transmission system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover to exclusively adjust at least one of a flow and a pressure in the hydrostatic transmission system to an operational set point.

30. 发明申请

US20190226179A1 WHEEL LOADER 审中-公开
公开(公告)号：US20190226179A1
公开(公告)日：2019-07-25
申请号：US16288941
申请日：2019-02-28
申请人： KCM Corporation
发明人： Kohtaroh UNO , Shoroku KAWAHARA , Keigo KIKUCHI , Koji HYODO , Atsushi SHIMAZU
IPC分类号： E02F9/22 , F02D29/04 , E02F9/20 , E02F9/08 , E02F3/28 , F16H61/468 , E02F9/02 , E02F3/43
CPC分类号： E02F9/2253 , E02F3/283 , E02F3/431 , E02F9/02 , E02F9/0841 , E02F9/2066 , E02F9/2289 , E02F9/2296 , F02D29/04 , F16H61/468
摘要： To improve working efficiency in an eco mode when a power mode and the eco mode have been set in a wheel loader, the wheel loader is provided with a controller having an eco mode characteristic line, a power mode characteristic line, and a lifting operation characteristic line having a matching point C located between a matching point A between a working device operating engine torque characteristic line and the eco mode characteristic line and a matching point B between the working device operating engine torque characteristic line and the power mode characteristic line. The controller includes a control portion, which controls a HST pump in accordance with the lifting operation characteristic line when lifting operation of a lift arm is detected while the eco mode has been selected by a work mode selecting portion.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式