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公开(公告)号：US20200256404A1
公开(公告)日：2020-08-13
申请号：US16639999
申请日：2018-08-16
发明人： Richard Randel LYMAN, JR. , Anil Balasaheb KHARPAS , Avinash Dadaso PATIL , Sanjay Dhondappa MALI , Matthew Edward CRESWICK
IPC分类号： F16D31/02 , F16H61/423 , F16H61/433 , F04B49/12
摘要： Control systems and feedback assemblies for hydraulic axial displacement machines, such as pumps and motors. The control systems and feedback assemblies can reduce friction on the charging spools and provide for a more reliable return of the swashplate to a neutral position. Aspects of the control systems and feedback assemblies can be modularized for, e.g., easy maintenance and to reduce the overall size of the system.
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公开(公告)号：US10385880B2
公开(公告)日：2019-08-20
申请号：US15481731
申请日：2017-04-07
发明人： Stephen Frantz
IPC分类号： F15B13/02 , F04B49/00 , F03C1/06 , F03C1/40 , F16H61/46 , F15B11/04 , B60T13/24 , F16H61/423 , F16H61/47
摘要： A hydraulic unit includes a driving mechanism whose displacement volume is adjustable to two operational states by means of a position-able adjustment element. The adjustment element can be positioned by a servo piston of a servo unit into a first, initial position and a second, operative position. A first front face and a second front face of the servo piston, which are opposing each other, can be pressurized individually with pressurized hydraulic fluid in order to position the servo piston at either end position of a servo cylinder of the servo unit. The servo piston is of a stepped design thereby forming a ring-shaped damping surface opposing the first front face. In the servo cylinder a ring-shaped shoulder surface is formed opposing the damping surface such that a damping volume is formed in the servo cylinder by the damping surface, the shoulder surface and the servo cylinder.
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公开(公告)号：US10316496B2
公开(公告)日：2019-06-11
申请号：US15390536
申请日：2016-12-26
申请人： KUBOTA CORPORATION
发明人： Yuji Fukuda , Kazuyoshi Arii , Keisuke Miura , Ryosuke Kinugawa , Ikuhiro Uotani , Satoshi Tajima , Ryohei Sumiyoshi , Kunihiro Suzuki
IPC分类号： F15B11/16 , E02F9/22 , F16H61/4035 , F16H61/421 , F15B13/042 , F16H61/423 , F15B11/042 , E02F3/34
摘要： A hydraulic system for a work machine includes a hydraulic pump to supply a pilot fluid, and a hydraulic switch valve to be switched to a plurality of switching positions based on a pilot pressure. The pilot pressure is a pressure of the pilot fluid supplied from the hydraulic pump. The hydraulic system includes a direction switch valve to apply a first pilot pressure to the hydraulic switch valve to switch the hydraulic switch valve into one of the plurality of switching positions. The hydraulic system includes a pressure applying device to apply a second pilot pressure to the hydraulic switch valve. The second pilot pressure is lower than the first pilot pressure.
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公开(公告)号：US20180135749A1
公开(公告)日：2018-05-17
申请号：US15571470
申请日：2016-05-04
IPC分类号： F16H61/4148 , B60K17/10 , B60K17/356 , B60K23/08 , B60K7/00 , F16H61/4078 , F16H61/423
摘要： The present invention relates to a hydraulic-assistance system for motor vehicles, comprising a primary motor (M) and two hydraulic machines (140; 240, 250) connected by a hydraulic circuit such that when a first hydraulic machine (140) operates as a pump, the second hydraulic machine (240, 250) operates as a motor. The invention is characterized in that the hydraulic circuit connecting the two machines (140; 240, 250) is an open circuit passing through a tank (300), the hydraulic machine (240, 250) operating as a motor is a declutchable machine, and the hydraulic machine (140) operating as a pump is a pump in which the variable displacement is controlled by a device comprising a proportional pressure limiter (470) placed between a drain line (143) and the discharge line of the hydraulic machine (140) operating as a pump, and enabling the assistance pressure to be set, and at least one collection nozzle (460) placed between the proportional pressure limiter (470) and the discharge line of the hydraulic machine (140), the setpoint pressure controlling the hydraulic machine (140) operating as a pump being collected between the pressure limiter (470) and the collection nozzle (460).
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公开(公告)号：US09512917B2
公开(公告)日：2016-12-06
申请号：US14302115
申请日：2014-06-11
IPC分类号： F16H61/4008 , F16H61/4157 , F16H61/42 , F16H61/4017 , F16H61/423 , F16H61/433 , F16H61/421
CPC分类号： F16H61/48 , F16H61/4017 , F16H61/4157 , F16H61/42 , F16H61/421 , F16H61/423 , F16H61/433
摘要： A speed control system for a hydrostatic transmission includes an engine having a drive shaft connected to a hydraulic pump. At least one hydrostatic motor is connected to the pump in a closed circuit by a flow line. Connected to the motor via a system shaft is a vehicle system. A controller is connected to a plurality of sensors and a proportional high pressure relief valve that is connected to the flow line between the pump and the motor. Based on information received from the sensors, the controller sets the pressure relief valve to limit the pressure to a valve that will not over-speed the engine and allows the demands of the speed control system to be attained. This may be accomplished through the use of various algorithms.
摘要翻译： 用于静液压变速器的速度控制系统包括具有连接到液压泵的驱动轴的发动机。 至少一个静液压马达通过流水线在闭合回路中连接到泵。 通过系统轴连接到电机是车辆系统。 控制器连接到多个传感器和连接到泵和电动机之间的流动管线的比例高压溢流阀。 根据从传感器接收的信息，控制器设置减压阀，以将压力限制在不会超速发动机的阀门上，并允许实现速度控制系统的要求。 这可以通过使用各种算法来实现。
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公开(公告)号：US09506399B2
公开(公告)日：2016-11-29
申请号：US14347765
申请日：2012-10-29
发明人： Noriyuki Hayashi , Motoki Ebisu
IPC分类号： F02B33/44 , F02B39/04 , F16H57/04 , F16H39/02 , F02B39/12 , F02B39/08 , F02B39/10 , F16H61/425 , F16H61/435 , F02B33/40 , F02B39/16 , F16H61/423 , F04B17/03 , F04B1/04 , F04B23/10 , F04B23/14 , F04D25/04 , F04D25/06 , F02B39/00
CPC分类号： F02B39/12 , F02B33/40 , F02B39/005 , F02B39/04 , F02B39/08 , F02B39/10 , F02B39/16 , F04B1/0413 , F04B17/03 , F04B23/103 , F04B23/14 , F04D25/04 , F04D25/0606 , F16H39/02 , F16H61/423 , F16H61/425 , F16H61/435
摘要： An object is to provide an electric supercharging device that has a high degree of freedom in layout and can suppress the generation of heat from an electric motor. The electric supercharging device 1 includes an electric motor 2, a compressor 3 that supercharges intake air for a vehicle engine, a hydraulic accelerator 10 that accelerates the rotation of the electric motor 2 and transmits the rotation to the compressor 3, and rotation speed adjustment controller 4 that controls the rotation speed of the electric motor 2 and an acceleration ratio of the hydraulic accelerator 10 and adjusts the rotation speed of the compressor 3. The hydraulic accelerator 10 includes a variable displacement hydraulic pump 12 that is connected to the electric motor 2 and is driven by the electric motor 2, a variable displacement hydraulic motor 14 that is connected to the compressor 3 and is driven by hydraulic oil supplied from the hydraulic pump 12, and a hydraulic circuit 13 that is formed by the connection between the hydraulic pump 12 and the hydraulic motor 14.
摘要翻译： 本发明的目的是提供一种具有高自由度布置的电动增压装置，并且可以抑制来自电动机的热量的产生。 电动增压装置1包括：电动机2，对车辆用发动机的吸入空气进行增压的压缩机3;加速电动机2的旋转并将旋转传递到压缩机3的油压加速器10;以及转速调节控制器 控制电动机2的转速和液压加速器10的加速比，并调整压缩机3的转速。液压加速器10包括与电动机2连接的变量液压泵12， 由电动机2驱动，连接到压缩机3并由从液压泵12供应的液压油驱动的可变排量液压马达14和通过液压泵12的连接形成的液压回路13 和液压马达14。
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公开(公告)号：US09097340B2
公开(公告)日：2015-08-04
申请号：US13786535
申请日：2013-03-06
申请人： Kubota Corporation
发明人： Seiji Ohkubo , Fumitake Okunishi , Yasutaka Kido
IPC分类号： F16D31/02 , F16H61/423 , F04B17/05 , F16H39/14 , F04B1/32 , F04B49/00 , F03C1/26 , F16H61/462
CPC分类号： F16H61/423 , F03C1/26 , F04B1/324 , F04B17/05 , F04B49/002 , F16H39/14 , F16H61/462
摘要： A hydraulic actuator is arranged such that the hydraulic actuator operates a swash plate of a hydraulic motor by a first pilot pressure and a second pilot pressure, the first pilot pressure being branched from a high-speed oil passage and applied to the hydraulic actuator for operating the swash plate of the hydraulic motor to a low speed side, the second pilot pressure being branched from a charge pump and applied to the hydraulic actuator for operating the swash plate of the hydraulic motor to a high speed side.
摘要翻译： 液压致动器被布置成使得液压致动器通过第一先导压力和第二先导压力操作液压马达的斜盘，第一先导压力从高速油路分支并施加到液压致动器以用于操作 液压马达的斜盘到低速侧，第二先导压力从电荷泵分支，并施加到用于将液压马达的斜盘操作到高速侧的液压致动器。
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公开(公告)号：US5634335A
公开(公告)日：1997-06-03
申请号：US605198
申请日：1996-03-01
IPC分类号： F16H39/02 , F16H61/40 , F16H61/4061 , F16H61/4148 , F16H61/4157 , F16H61/42 , F16H61/423 , F16H61/46 , F16H61/472 , F16D31/02
CPC分类号： F16H61/4148 , F16H39/02 , F16H61/4157 , F16H61/423 , F16H61/46 , F16H61/472 , F16H61/4061
摘要： The invention relates to a hydrostatic transmission having a hydraulic pump (1) and an adjustable hydraulic motor (2) which is connected to first and second working lines (13, 14) of which at least the first (13) leads to the hydraulic pump, and a setting member (40)--for setting the motor displacement volume--is connected with a setting device (4) which upon load operation of the hydrostatic transmission can be acted upon by a setting pressure in a first setting pressure line (44, 57, 43) connected at least to the first working line, and in the case of overrun operation, can be acted upon by the setting pressure in a second setting pressure line (45, 51, 43), connected at least to the second working line. There is a brake valve (6) arranged at least in the second working line downstream of the connection of the second setting pressure line and which upon overrun operation of the hydrostatic transmission the respective working line is restricted. In order to be able to adapt the braking effect to differing operating conditions, there is provided a relief valve device (9, 10) which upon overrun operation is controlled by means of a control pressure taken from the second setting pressure line (45, 51, 43), against a counter-pressure (66, 76) in the direction of throughflow position and in this throughflow position relieves the setting pressure in the second setting pressure line (45, 51, 43) controllably via a relief line (65) to the tank (12).
摘要翻译： PCT No.PCT / EP94 / 02504 Sec。 371日期1996年3月1日 102（e）1996年3月1日PCT PCT 1994年7月28日PCT公布。 公开号WO95 / 06830 日期：1995年3月9日本发明涉及一种具有液压泵（1）和可调节液压马达（2）的液压传动装置，其连接到第一和第二工作线路（13,14），至少第一（13） 通向液压泵，并且用于设定电动机排量的设定构件（40）与设置装置（4）连接，在静液压传动装置的加载操作可以通过第一设定中的设定压力 至少连接到第一工作线的压力线（44,57,43），并且在超程操作的情况下，可以在第二设定压力线（45,51,43）中的设定压力下作用，连接在 至少到第二条工作线。 至少设置在第二设定压力线的连接的下游的第二工作线路中的制动阀（6），并且在液压传动装置的超程运转时，各个工作线路受到限制。 为了能够将制动效果适应于不同的运行条件，提供了一种安全阀装置（9,10），其在通过从第二设定压力线（45,51）获取的控制压力来控制超速运行时 ，43）相对于通流位置方向的反压（66,76），并且在该通流位置中，通过浮雕线（65）可控地减轻第二设定压力线（45,51,43）中的设定压力， （12）。
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公开(公告)号：US5197283A
公开(公告)日：1993-03-30
申请号：US667403
申请日：1991-04-01
申请人： Hitoshi Kagiwada , Tomohiko Yasuoka
发明人： Hitoshi Kagiwada , Tomohiko Yasuoka
IPC分类号： E02F9/12 , F16H61/40 , F16H61/4069 , F16H61/4139 , F16H61/4148 , F16H61/4157 , F16H61/42 , F16H61/423
CPC分类号： F16H61/4069 , E02F9/123 , F16H61/40 , F16H61/4139 , F16H61/4148 , F16H61/4157 , F16H61/423
摘要： A hydraulic-motor drive circuit system includes an auxiliary hydraulic source connected to one end of an auxiliary line, a low-pressure selector connected to the other end of the auxiliary line and a pair of main lines for causing the other end of the auxiliary line to communicate with one of the main lines on the low pressure side during rotation of a hydraulic motor for driving an inertia load, and a switching control arranged in the auxiliary line for supplying the hydraulic fluid from the auxiliary hydraulic source to the other end of the auxiliary line when the directional control valve is in a neutral position, cutting off the hydraulic fluid from the auxiliary hydraulic source to the other end of the auxiliary line when the directional control valve is in an operative position. When the directional control valve is returned to the neutral position to halt the hydraulic motor, if brake pressure is generated in the main line on the return side by inertial rotation of the hydraulic motor, the low-pressure selector causes the main line on the supply side to communicate with the auxiliary line, and the switching control enables the hydraulic fluid from the auxiliary hydraulic source to be supplied to the other end of the auxiliary line. Thus, the auxiliary hydraulic source replenishes hydraulic fluid into the main line on the supply side through the auxiliary line and the low-pressure selector, preventing cavitation in the main line on the low pressure side.
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公开(公告)号：US5184466A
公开(公告)日：1993-02-09
申请号：US746125
申请日：1991-08-15
IPC分类号： F16H61/42 , F16H61/421 , F16H61/423 , F16H61/425 , F16H61/431 , F16H61/433 , F16H61/435 , F16H61/439 , F16H61/46
CPC分类号： F16H61/431 , F16H61/421 , F16H61/439 , F16H61/46
摘要： The invention relates to a control and regulating device for a hydrostatic transmission which comprises a reversible hydraulic pump that can be driven by a driving motor, at least one hydraulic motor that is connected via two working lines to the hydraulic pump, and an adjusting device that can be acted on by an adjusting pressure for adjusting the volume and direction of displacement of the hydraulic pump, together with a displacement-direction control valve for controlling and regulating the action of the adjusting pressure on the adjusting device, can be actuated as desired both by a control signal that is proportional to the speed of rotation of the driving motor and predetermines the direction of displacement of the hydraulic pump and by a working pressure signal that is proportional to the working pressure in the working line then carrying the high pressure. To enable a load that has been decelerated to a standstill both to be maintained at a standstill and also to be shunted without mechanical braking, even when actuation of the displacement-direction control valve by the control signal is interrupted, the invention provides for switching over the working pressure signal applied to the displacement-direction control valve in the absence of the control signal.
摘要翻译： 本发明涉及一种用于静液压变速器的控制和调节装置，其包括可由驱动电动机驱动的可逆液压泵，经由两条工作管线连接到液压泵的至少一个液压马达和调节装置， 可以通过用于调节液压泵的排量的体积和方向的调节压力以及用于控制和调节调节装置上的调节压力的作用的位移方向控制阀来实现，可以根据需要被致动 通过与驱动马达的旋转速度成比例的控制信号，并且预先确定液压泵的排量方向以及与工作线中的工作压力成比例的工作压力信号，然后承载高压。 为了使已经减速到停止的负载被保持在静止状态，并且在没有机械制动的情况下也被分流，即使当控制信号的驱动位移方向控制阀被中断时，本发明提供了切换 在没有控制信号的情况下施加到位移方向控制阀的工作压力信号。
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