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    • 2. 发明申请
    • FLUID BEARING AND METHOD OF OPERATION
    • 流体轴承和操作方法
    • WO2007127398A3
    • 2007-12-21
    • PCT/US2007010290
    • 2007-04-27
    • US GOV ENV PROTECTION AGENCYGRAY CHARLES L
    • GRAY CHARLES L
    • F01B3/00F04B1/20F04B27/08F16C32/06F16C39/04
    • F04B1/2085F16C32/0696F16C2360/00
    • A fluid bearing (203) includes first and second hydrostatic pads (330,331,332,334) formed in a surface of an insert (338) and positioned to exert a separating force, and a land (328) formed on the surface of the insert and configured to act as a bushing to allow rotation while the first and second pads are pressurized at less than a hydrostatic balance force. Pressurized fluid to the pads of the insert is controlled to prevent operation in full hydrostatic mode. More particularly, a separating force generated by surface force of the pads is controlled such that the separating force does not exceed a force exerted on the bearing. The fluid pressure is also controlled to keep the separating force within a selected margin of the force exerted on the bearing, to control wear of the bearing. Control of the separating force is achieved by selectively pressurizing individual hydrostatic pads, thereby effectively varying the active hydrostatic area of the bearing.
    • 流体轴承(203)包括形成在插入件(338)的表面中并定位成施加分离力的第一和第二静压垫(330,331,332,334)和形成在插入件的表面上并且被配置为作用 作为允许旋转的衬套,同时第一和第二垫在小于静水平衡力下被加压。 加压流体到插入件的垫被控制以防止在完全静液压模式下操作。 更具体地,控制由垫的表面力产生的分离力,使得分离力不超过施加在轴承上的力。 还控制流体压力以将分离力保持在施加在轴承上的力的选定余量内,以控制轴承的磨损。 分离力的控制通过选择性地加压各个静压垫来实现,从而有效地改变轴承的主动静水压面积。
    • 8. 发明申请
    • MODULAR HYDRAULIC HYBRID DRIVETRAIN
    • 模块化液压混合动力
    • WO2012122348A1
    • 2012-09-13
    • PCT/US2012/028218
    • 2012-03-08
    • U.S. ENVIRONMENTAL PROTECTION AGENCYGRAY, Charles, L., Jr.
    • GRAY, Charles, L., Jr.
    • F16H39/00B60K6/12
    • B60K6/12B60K17/10B60Y2304/072B60Y2410/00F16H2039/005Y02T10/6208Y10T29/49229
    • An integrated drive module for a hydraulic hybrid vehicle includes two variable displacement over-center bent-axis hydraulic pump/motors having respective yokes that reside and pivot within a common fluid-filled case. The cylinder barrel of each respective pump/motor is connected to high pressure by means of a respective fluid-conducting yoke leg, and is connected to low pressure by means of the fluid-filled case. A single primary high-pressure port connects the module to a high pressure source, and a single primary low-pressure port connects the fluid-filled case to a low pressure source. Preferably, one pump/motor acts primarily as a pump to receive mechanical input power from an engine and the other pump/motor acts primarily as a motor to propel a vehicle. When one of the pump/motors is acting as a pump and the other is acting as a motor, fluid drawn from the fluid-filled case by the pump is replaced by discharge from the motor. The module is preferably packaged on a removable support structure that facilitates installation to a variety of vehicle chassis. Optionally the case may be a dry case rather than a fluid-filled case, in which the benefits of modularization are retained.
    • 一种用于液压混合动力车辆的集成驱动模块包括两个可变排量的超中心弯曲轴液压泵/马达,其具有在公共的填充液体的情况下驻留和枢转的各自的轭。 每个相应的泵/马达的气缸筒通过相应的导流轭架连接到高压,并通过流体填充的壳体连接到低压。 单个主高压端口将模块连接到高压源,单个主低压端口将流体填充的箱体连接到低压源。 优选地,一个泵/马达主要作为泵接收来自发动机的机械输入动力,另一个泵/马达主要作为马达来驱动车辆。 当其中一个泵/电动机作为泵而另一个作为电动机时,由泵从流体填充的壳体中抽出的流体被电动机的排放代替。 该模块优选地包装在便于安装到各种车辆底盘的可移除支撑结构上。 可选地,壳体可以是干燥的情况,而不是流体填充的情况,其中保持模块化的益处。
    • 9. 发明申请
    • METHODS FOR SAFE OPERATION OF HYDRAULIC HYBRID VEHICLES WITH OVER-CENTER PUMP/MOTORS
    • 液压混合动力车用中央泵/电机的安全运行方法
    • WO2011133344A3
    • 2012-04-05
    • PCT/US2011031806
    • 2011-04-08
    • US ENVIRONMENTGRAY CHARLES L
    • GRAY CHARLES L
    • B60W10/30B60K6/22B60W20/00
    • B60K6/12B60W10/04B60W10/06B60W50/038F15B1/024F15B1/033F15B20/002F15B20/004F15B20/008F15B2211/20553F15B2211/212F15B2211/8626F15B2211/87F15B2211/8752F15B2211/8755F16H61/4192F16H61/421F16H61/439Y02T10/6208Y02T10/6282
    • Fail-safe methods for utilizing an over-center pump/motor in a hydraulic hybrid vehicle are disclosed. A high-pressure fluid shutoff valve and an optional electrically or manually operated valve are additionally provided as means to ensure disconnection of the high pressure source in the event of a failure. Displacement stroke position and pressure differentials across the pump/motor are continually monitored. On detection of various modes of failure or irregularity in control of displacement, actions are taken including any of: the high pressure and low pressure accumulators are shut off automatically or manually, a check valve between the high and low pressure ports of the pump/motor is activated, and a small amount of pressurized fluid is released from the high pressure circuit to depressurize the captive fluid. Safe startup and shutdown procedures are also specified. The system provides for safe operation of a hydraulic hybrid vehicle that includes an engine pump and drive motor, at least one of which operates over-center. The system optionally provides a displacement control valve that is controlled by feedback from an actuator or displacement position sensor and that on loss of electric power to the displacement control valve will cause the controlled pump/motor to stroke to a zero displacement position.
    • 公开了在液压混合动力车辆中利用超中心泵/马达的故障安全方法。 另外提供高压流体截止阀和可选的电动或手动操作的阀作为在发生故障时确保高压源断开的装置。 持续监控泵/电机上的位移行程位置和压力​​差。 在检测各种失效模式或位移控制不规则的情况下,采取以下措施:高压和低压蓄能器自动或手动关闭,泵/电机的高压端口和低压端口之间的止回阀 被激活,并且少量的加压流体从高压回路释放以使捕获流体减压。 还指定了安全的启动和关闭程序。 该系统提供了包括发动机泵和驱动电动机的液压混合动力车辆的安全操作,其中至少一个操作在中心以上。 该系统可选地提供一个位移控制阀,其通过来自致动器或位移传感器的反馈来控制,并且在排出控制阀的电力损失时将导致受控的泵/电动机行驶到零位移位置。
    • 10. 发明申请
    • HYDRAULIC CIRCUIT AND MANIFOLD WITH MULTIFUNCTION VALVE
    • 带多功能阀的液压回路和歧管
    • WO2011037612A3
    • 2011-08-04
    • PCT/US2010002561
    • 2010-09-20
    • US ENVIRONMENTGRAY CHARLES L
    • GRAY CHARLES L
    • F15B13/02F15B11/02F16K1/22F16K11/00F16K31/52
    • G05D7/0641Y10T137/0318Y10T137/0396Y10T137/7771Y10T137/778Y10T137/7878Y10T137/7898Y10T137/7906Y10T137/877
    • A hydraulic manifold has features adapted to the needs of hybrid vehicle applications. In one embodiment, multifunction valves selectively regulate fluid flow among primary and auxiliary flow paths. A normally closed butterfly valve is biased by a relatively small secondary biasing force against rotation in first and second (opposite) directions, and by a relatively large principal biasing force against rotation in the first direction past a transitional angular position at which the principal biasing force takes effect. An actuator selectively controls the transitional angular position and the magnitude of the principal biasing force. In the first direction, flow must overcome only the secondary biasing force to pass the valve. In the second direction, any flow sufficient to overcome the secondary biasing force but not the principal biasing force will divide into a first flow passing the valve and a second flow induced to enter an auxiliary path upstream. Additional flow causing the principal biasing force to additionally be overcome will substantially pass the valve as part of the first flow. This and other embodiments provide a manifold that is controllable to allocate flow among primary and auxiliary paths while remaining responsive to sudden large changes in flow independently of immediate control response.
    • 液压歧管具有适应混合动力车辆应用需求的特征。 在一个实施例中,多功能阀选择性地调节主和辅助流动路径之间的流体流动。 常闭蝶形阀在第一和第二(相反)方向上受到相对较小的第二偏置力的偏转,并且受到相对较大的主偏置力的作用,以抵抗第一方向上的旋转经过过渡角位置,在该过渡角位置处,主偏置力 生效。 致动器选择性地控制主偏置力的过渡角位置和大小。 在第一个方向上,流量必须仅克服通过阀门的辅助偏置力。 在第二方向上,任何足以克服二级偏置力而不是主偏置力的流动将分成通过阀的第一流动和被诱导进入上游的辅助路径的第二流动。 引起主偏压力额外被克服的附加流动将基本上通过阀作为第一流的一部分。 该实施例和其它实施例提供了一种可控制的歧管,以在主流程和辅助流程之间分配流量,同时保持响应流量的突然的大的变化,而与立即的控制响应无关。