公开(公告)号：US06442934B1

公开(公告)日：2002-09-03

申请号：US09232654

申请日：1999-01-19

申请人： Akihito Okuda ,  Shigeru Morimoto ,  Koichi Fushimi

发明人： Akihito Okuda ,  Shigeru Morimoto ,  Koichi Fushimi

IPC分类号： F04B4912

CPC分类号： F16H61/468 ,  F04B49/002 ,  F04B49/065 ,  F16H47/04 ,  F16H61/46 ,  F16H2037/0866

摘要： The present invention provides a hydraulic controller for a variable capacity hydraulic transmission. This hydraulic controller reduces the load of the engine to improve fuel efficiency while maintaining a hydraulic pressure which is necessary for the control of the skew angles of the swash plates of the variable capacity type hydraulic pump and hydraulic motor that are incorporated in the transmission. The hydraulic controller adjusts the hydraulic pressure supplied to the servo cylinders 92 and 96 which are to tilt the pump swash plate 32 and the motor swash plate 38, to a minimum necessary pressure on the basis of the pressure Ph of the oil passage which is at the higher pressure in the hydraulic closed circuit 26. The hydraulic controller adjusts the hydraulic pressure also on the basis of the types of the valve plates of the hydraulic pump 24 and the hydraulic motor 25, the skew angles of the swash plates, the rotational speed Np of the hydraulic pump and the rotational speed Nm of the hydraulic motor, and the operational condition of the transmission.

摘要翻译： 本发明提供一种用于可变容量液压传动装置的液压控制器。 该液压控制器降低发动机的负载以提高燃料效率，同时保持用于控制可变容量型液压泵和液压马达的斜盘的倾斜角度所必需的液压，该液压压力机和液压马达装在变速器中。 液压控制器根据油路中的压力Ph，将提供给伺服缸92和96的液压压力调整到最小必要压力，使伺服缸92和96倾斜泵斜盘32和马达斜盘38。 液压闭合回路26中的压力越高。液压控制器还根据液压泵24和液压马达25的阀板的类型，斜盘的倾斜角度，转速 液压泵的Np和液压马达的转速Nm，以及变速器的运转状态。

公开(公告)号：US06547531B1

公开(公告)日：2003-04-15

申请号：US10050466

申请日：2002-01-16

申请人： Terry L. Cumbo ,  Robert C. Hodges ,  Anthony L. Reilly

发明人： Terry L. Cumbo ,  Robert C. Hodges ,  Anthony L. Reilly

IPC分类号： F04B4912

CPC分类号： F04B1/295 ,  F04B2201/1201 ,  F04B2201/1205 ,  F04B2205/05

摘要： A conventional variable-displacement, axial piston-type hydraulic fluid pump having a pump housing is provided with co-operating pump rotational speed, thrust plate position, and working pressure operating-condition sensor assemblies that are partially contained within the pump housing, that are partially contained within a separate position sensor housing which is removably secured to the pump housing, and that are sealed against high-pressure fluid leakage using only static resilient fluid pressure seals.

摘要翻译： 具有泵壳体的传统的可变排量的轴向活塞式液压流体泵设置有部分包含在泵壳体内的协同泵转速，推力板位置和工作压力操作状态传感器组件， 部分地包含在单独的位置传感器壳体中，该壳体可移除地固定到泵壳体，并且仅使用静态弹性流体压力密封件来密封以防止高压流体泄漏。