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1. 发明授权

US4167855A Hydrostatic transmission control system for improved hillside operation 失效
标题翻译：用于改善山坡运行的静液传动控制系统
公开(公告)号：US4167855A
公开(公告)日：1979-09-18
申请号：US907227
申请日：1978-05-18
申请人： Kenneth K. Knapp
发明人： Kenneth K. Knapp
IPC分类号： F16H61/42 , F16H61/439 , F16H39/46
CPC分类号： F16H61/42 , F16H61/439
摘要： A hydrostatic transmission control system is provided of the type utilizing a main control valve to vary the control pressure being ported to the strokers which control the swashplate position of a variable displacement pump. The control valve includes a control port connected to a source of control pressure fluid and a pair of stroker ports, each of which is connected to one of the strokers. The control valve includes a valve member having a valve land associated with each of the stroker ports, the lands preferably being either zero-lapped or under-lapped and disposed to provide a substantially zero neutral band to provide an improved control response when it is necessary for the valve member to cross the neutral band and port control pressure to the opposite stroker. The control system further includes a positive neutral arrangement wherein movement of the control lever to the neutral setting energizes a valve, preferably a solenoid valve, which interconnects the lines leading from the stroker ports to the stroking cylinders, to insure zero swashplate displacement, despite the use of the zero neutral band control valve.
摘要翻译：提供了一种使用主控制阀的类型的静液压变速器控制系统，以改变被控制到控制可变排量泵的斜盘位置的控制器的控制压力。控制阀包括连接到控制压力流体源的控制端口和一对触发器端口，每个触发器端口连接到一个触发器。控制阀包括阀构件，该阀构件具有与每个触发器端口相关联的阀台面，所述焊盘优选地为零重叠或未被重叠并设置成提供基本为零的中性带，以在必要时提供改进的控制响应为了使阀构件穿过中性带，并将端口控制压力传递给相反的冲击器。控制系统还包括一个正中性装置，其中控制杆到中性位置的运动为一个阀（优选一个电磁阀）通电，该阀将从触发器端口引导到行程气缸的线相互连接，以确保零斜盘位移，尽管使用零中性带控制阀。

2. 发明授权

US4189921A Hydraulic controller 失效
标题翻译：液压控制器
公开(公告)号：US4189921A
公开(公告)日：1980-02-26
申请号：US14171
申请日：1979-02-22
申请人： Kenneth K. Knapp
发明人： Kenneth K. Knapp
IPC分类号： F04B49/00 , F04B49/06 , F04B49/08 , F16H61/42 , F16H61/433 , F16H61/46 , F16H61/465 , F16H39/46
CPC分类号： F16H61/433 , F04B49/002 , F04B49/06 , F04B49/08 , F16H61/46 , F16H61/465
摘要： A hydraulic controller for a hydrostatic transmission to control a number of functions of a variable displacement pump or motor of the transmission. A valve includes a spool biased in one direction by a spring and in the opposite direction by fluid pressure in a chamber communicating with the charge pump. A variable orifice communicates the chamber with a drain. The size of the orifice is controlled electrically by a signal representative of swashplate position. Depending upon the pressure of the fluid in the chamber, the valve will directly vary the pressure ported from the charge pump to the standard controller. A needle roller has one end in contact with the end of the spool communicating with the chamber. A high pressure signal is provided via a shuttle valve across the high and low pressure conduits of the transmission to the other end of the needle roller. The control valve is thereby responsive to both pump displacement and the highest pressure within the transmission thereby making it a torque limiting controller. Various other modifications are described.
摘要翻译：一种用于静液传动的液压控制器，用于控制变速箱的可变排量泵或电动机的多个功能。阀包括通过弹簧沿一个方向偏置的阀芯，并且在与电荷泵连通的腔室中的流体压力沿相反方向。可变孔口将腔室与排水管连通。孔口的尺寸由表示斜盘位置的信号电气控制。取决于腔室中的流体的压力，阀将直接改变从电荷泵移动到标准控制器的压力。针辊的一端与与腔室连通的线轴的端部接触。高压信号通过穿梭阀穿过变速器的高压和低压管道提供给针辊的另一端。因此，控制阀响应于泵的位移和变速器内的最高压力，从而使其成为转矩限制控制器。描述各种其它修改。

3. 发明授权

US4041703A Hydrostatic transmission with integral auxiliary pump 失效
标题翻译：带静态辅助泵的静液压传动
公开(公告)号：US4041703A
公开(公告)日：1977-08-16
申请号：US689283
申请日：1976-05-24
申请人： Kenneth K. Knapp
发明人： Kenneth K. Knapp
IPC分类号： F16H61/40 , F16H61/4139 , F16H39/46 , F15B15/18
CPC分类号： F16H61/4139 , F16H61/433 , Y10S60/916
摘要： A hydrostatic transmission is disclosed which includes a pump assembly in which a main pump, a charge pump, and an auxiliary pump are commonly housed and are drivingly connected to a single shaft assembly. An external fluid connection is provided through which fluid is directed from the auxiliary pump to a power take off, and valving is provided to short circuit the auxiliary pump when power is not demanded. Means of controlling the rate of operation of the valve are also provided to prevent excessive pressure rise rates at the outlet of the auxiliary pump upon actuation of the valving.
摘要翻译：公开了一种静液压变速器，其包括泵组件，其中主泵，电荷泵和辅助泵通常被容纳并且驱动地连接到单个轴组件。提供外部流体连接，通过该外部流体连接，流体从辅助泵引导到动力输出，并且当不需要动力时，提供阀以使辅助泵短路。还提供了控制阀的操作速率的手段，以防止在启动阀时辅助泵的出口处的过大的压力上升速率。

4. 发明授权

US3972189A Control for hydrostatic transmissions 失效
标题翻译：液压传动控制
公开(公告)号：US3972189A
公开(公告)日：1976-08-03
申请号：US632741
申请日：1975-11-17
申请人： Kenneth K. Knapp , Charles R. Cornell , Edwin D. Hicks
发明人： Kenneth K. Knapp , Charles R. Cornell , Edwin D. Hicks
IPC分类号： F16H61/42 , F16H61/433 , F16H39/46
CPC分类号： F16H61/4139 , F16H61/42 , F16H61/433
摘要： A control valve for a variable displacement pump or motor. The valve includes a pair of solenoids which are independently actuatable to port relatively high pressure fluid to their respective servo motor. A shuttle valve actuated by the high pressure fluid is used to simultaneously port the fluid from the other servo motor to a low pressure fluid source. A manual valving system is also provided having a pair of balls each biased into engagement with a seat to seal a passage to one of the servo motors. Movement of either ball off of its seat allows high pressure to flow to the respective servo motor. The high pressure fluid actuates the shuttle valve to port fluid from the other servo motor to the low pressure fluid source.
摘要翻译：用于可变排量泵或电动机的控制阀。该阀包括一对螺线管，其可独立地致动以将相对高压的流体输送到其相应的伺服电动机。由高压流体致动的梭阀用于将来自另一个伺服电动机的流体同时输送到低压流体源。还提供了一种手动阀系统，其具有一对球，每个球偏置成与座接合，以密封通往一个伺服电动机的通道。任何一个球从其座位移动允许高压流向相应的伺服电机。高压流体致动梭阀以将流体从另一伺服马达输送到低压流体源。

5. 发明授权

US4116002A Control for a variable displacement pump or motor 失效
标题翻译：变量泵或电机的控制
公开(公告)号：US4116002A
公开(公告)日：1978-09-26
申请号：US826278
申请日：1977-08-22
申请人： Kenneth K. Knapp , Charles R. Cornell
发明人： Kenneth K. Knapp , Charles R. Cornell
IPC分类号： F16H61/46 , F16H61/478 , F16H39/46
CPC分类号： F16H61/433 , F16H61/46 , F16H61/478 , F16H2059/6861
摘要： A control including a control valve and an override valve for use with a variable displacement pump or motor unit having a pair of strokers into and out of which fluid must be directed to vary the displacement of the unit. The control valve ports fluid from a high pressure source to a first control passage and from a second control passage to a low pressure source, reverses said flow, and terminates said flow. The override valve is interposed between the control passages and the strokes and defines a pair of override passages therein used to direct fluid from one control passage to one stroker and from the other stroker to the other control passage. The override valve is selectively movable between a first position directing such flow therethrough and a second position in which such flow is terminated between the control passages and the strokers. Upon flow termination, the override valve communicates, via a bore in the override valve, the strokers with one another to allow the pump unit to go to minimum displacement or the motor unit to go to maximum displacement. In the preferred embodiment, the override valve is responsive to the high pressure fluid being ported from or to respectively, the pump or motor unit. The control may also include a centering valve interposed between the control valve and the override valve. The centering valve is responsive to the pressure of the control fluid to define passages between the first and second control passages and the first and second override passages. Upon a loss of control fluid pressure, the centering valve moves to a second position to cross port the control valve passages and the override valve passages. The override valve may also be actuated via external signals such as an electrical, mechanical, or manual input.
摘要翻译：一种控制装置，包括用于可变排量泵或电动机单元的控制阀和超控阀，所述变量泵或电动机单元具有进入和流出流体的一对调节器以改变单元的位移。控制阀将流体从高压源输送到第一控制通道，从第二控制通道流向低压源，使所述流动反向并终止所述流动。超控阀介于控制通道和行程之间，并且在其中限定了一对超驰通道，用于将流体从一个控制通道引导到一个冲击器，另一个控制通道从另一控制通道引导。超控阀可以选择性地在引导这样的流动的第一位置和第二位置之间移动，在第二位置，这种流动在控制通道和调节器之间终止。在流动终止时，过载阀通过超控阀中的孔与彼此相通的调节器相通，以允许泵单元进入最小位移或电机单元进行最大位移。在优选实施例中，超控阀响应于高压流体从泵或马达单元分别从泵或马达单元移入。控制器还可以包括插入在控制阀和超控阀之间的定心阀。定心阀响应于控制流体的压力以在第一和第二控制通道与第一和第二超控通道之间限定通道。当失去控制流体压力时，定心阀移动到第二位置以交叉输入控制阀通道和超控阀通道。超控阀也可以通过诸如电气，机械或手动输入的外部信号来致动。

6. 发明授权

US4087967A Sleeve spool valve 失效
标题翻译：套筒滑阀
公开(公告)号：US4087967A
公开(公告)日：1978-05-09
申请号：US777256
申请日：1977-03-14
申请人： Kenneth K. Knapp
发明人： Kenneth K. Knapp
IPC分类号： F16H61/42 , F16H61/433 , F16H61/46 , F16B9/00
CPC分类号： F16H61/433 , F16H61/46 , F16H2059/6861 , Y10T137/8671 , Y10T137/86767
摘要： A valve having a body with two ports and a bore, a sleeve selectively movable within said bore and having two radially extending passages adapted for sequential communication with one of said ports upon movement of said sleeve, and a spool selectively movable within said sleeve and including a land to restrict fluid flow in said passages. The valve is used as a variable pressure control valve in a closed loop hydrostatic circuit to control the displacement of a variable displacement pump. The spool is actuated in response to a pressure difference between the high pressure and the low pressure lines of the circuit. The sleeve is manually movable. A charge pump is provided to provide control fluid to one of the ports of the valve whereby movement of the sleeve and spool within the body will result in the flow of fluid from the charge pump to one servo of the variable displacement pump and from the other servo to drain. The sleeve is provided with a set of passages having a plurality of axially spaced radially extending passages adapted for sequential communication with one of the body ports. The passages within the sleeve are constructed to provide different flow rates for fluid when they are respectively aligned with the port.
摘要翻译：一种具有两个端口的本体和一个孔的套筒，可在所述孔内选择性地移动的套筒，并且具有两个径向延伸的通道，其适于在所述套筒移动时与所述端口中的一个顺序连通;以及可在所述套筒内选择性地移动的线轴，用于限制所述通道中的流体流动的区域。该阀用作闭环静液压回路中的可变压力控制阀，以控制可变排量泵的位移。阀芯响应于电路的高压和低压线之间的压差而致动。套筒可手动移动。提供电荷泵以将控制流体提供给阀的一个端口，由此套筒和阀芯在阀体内的移动将导致流体从电荷泵流入可变排量泵的另一个伺服器伺服排水。套筒设置有一组通道，其具有多个沿轴向隔开的径向延伸的通道，其适于与主体端口中的一个顺序连通。套筒内的通道被构造成当流体分别与端口对准时为流体提供不同的流速。

7. 发明授权

US4040254A Hydrostatic transmission with automatic displacement shifter 失效
标题翻译：具有自动位移移位器的静液压传动
公开(公告)号：US4040254A
公开(公告)日：1977-08-09
申请号：US670333
申请日：1976-03-25
申请人： Kenneth K. Knapp , William E. Koch
发明人： Kenneth K. Knapp , William E. Koch
IPC分类号： B62D11/18 , F16H61/42 , F16H61/423 , F16H61/46 , F16H61/472 , B62D11/04
CPC分类号： F16H61/472 , B62D11/183 , F16H61/423 , F16H61/46
摘要： A hydrostatic transmission system is provided which is particularly well adapted for use in driving vehicles employing skid-steer drives. In the system disclosed two independent hydrostatic transmissions, each employing a variable displacement motor are utilized; and a pressure responsive valve is employed to sense the magnitude of the load on each of the motors and to permit shifting the motors from minimum displacement toward maximum upon the sensing of a load in excess of a predetermined valve. The variable displacement motors of the system are configured to create forces during operation tending to urge the motors to maximum displacement, and the pressure responsive valve operates to bias the motors to minimum displacement when they are loaded at a magnitude less than the predetermined valve.
摘要翻译：提供一种静压传动系统，其特别适用于驾驶采用滑移转向机构的车辆。在该系统中公开了两个独立的静液压传动装置，每个使用一个可变排量马达; 并且使用压力响应阀来感测每个电动机上的负载的大小，并且允许在感测超过预定阀的负载时将电动机从最小位移向最大位移。该系统的可变排量马达被配置成在运行期间产生力，以便促使马达达到最大的排量，并且当它们以小于预定阀的载荷加载时，压力响应阀运行以将马达偏置为最小的位移。

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