公开(公告)号：US20140350794A1

公开(公告)日：2014-11-27

申请号：US13901238

申请日：2013-05-23

Applicant: Caterpillar Inc.

Inventor： Thomas J. Bickel ,  Amanda J. Wilke ,  Wendell D. Stahl ,  Andrew G. Genseal ,  Md Nasir Uddin ,  Dane S. Richards ,  Jennie L. Nelson

IPC: B62D6/00 ,  H02H3/16

CPC classification number: B62D6/00 ,  B62D5/04 ,  B62D5/0481 ,  H02H3/16

Abstract: A redundancy system for a steering system having a primary controller and a primary power source is provided. The redundancy system may include a secondary controller coupled to a secondary power source and configured to manage control of the steering system, and an interface circuit disposed between at least a first node and a second node. The first node may be in electrical communication with the primary power source, and the second node may be in electrical communication with the secondary power source. The interface circuit may be configured to selectively engage a self-test of the primary power source and the secondary power source, isolate a short at the first node from the secondary power source, and isolate a short at the second node from the primary power source.

Abstract translation: 提供了一种具有主控制器和主电源的转向系统的冗余系统。 冗余系统可以包括耦合到次级电源并被配置为管理对转向系统的控制的次级控制器以及设置在至少第一节点和第二节点之间的接口电路。 第一节点可以与主电源电通信，并且第二节点可以与次电源电通信。 接口电路可以被配置为选择性地接合主电源和次电源的自检，将第一节点处的短路与次电源隔离，并且将第二节点处的短路与主电源隔离 。

公开(公告)号：US09139223B2

公开(公告)日：2015-09-22

申请号：US13901238

申请日：2013-05-23

Applicant: Caterpillar Inc.

Inventor： Thomas J. Bickel ,  Amanda J. Wilke ,  Wendell D. Stahl ,  Andrew G. Genseal ,  Md Nasir Uddin ,  Dane S. Richards ,  Jennie L. Nelson

IPC: B62D6/00 ,  H02H3/16 ,  B62D5/04

CPC classification number: B62D6/00 ,  B62D5/04 ,  B62D5/0481 ,  H02H3/16

Abstract: A redundancy system for a steering system having a primary controller and a primary power source is provided. The redundancy system may include a secondary controller coupled to a secondary power source and configured to manage control of the steering system, and an interface circuit disposed between at least a first node and a second node. The first node may be in electrical communication with the primary power source, and the second node may be in electrical communication with the secondary power source. The interface circuit may be configured to selectively engage a self-test of the primary power source and the secondary power source, isolate a short at the first node from the secondary power source, and isolate a short at the second node from the primary power source.

Abstract translation: 提供了一种具有主控制器和主电源的转向系统的冗余系统。 冗余系统可以包括耦合到次级电源并被配置为管理对转向系统的控制的次级控制器以及设置在至少第一节点和第二节点之间的接口电路。 第一节点可以与主电源电通信，并且第二节点可以与次电源电通信。 接口电路可以被配置为选择性地接合主电源和次电源的自检，将第一节点处的短路与次电源隔离，并且将第二节点处的短路与主电源隔离 。

公开(公告)号：US09371843B2

公开(公告)日：2016-06-21

申请号：US14155074

申请日：2014-01-14

Applicant: Caterpillar Inc.

Inventor： Paul Moser ,  Jeffrey Allan Digby ,  Dennis Ray Barber ,  Wendell D. Stahl

IPC: F16K11/07 ,  F15B13/06 ,  F15B20/00 ,  F16K31/06

CPC classification number: F15B13/06 ,  F15B20/00 ,  F15B2211/20576 ,  F15B2211/41518 ,  F15B2211/635 ,  F15B2211/67 ,  F15B2211/8626 ,  F15B2211/8636 ,  F15B2211/8757 ,  F16K11/07 ,  F16K31/0613 ,  Y10T137/0318 ,  Y10T137/86574 ,  Y10T137/86622

Abstract: A failsafe pilot selector valve may include at least one inlet port, a first outlet port, a second outlet port, and a biasing element. The failsafe pilot selector valve may have a first end position with the at least one inlet port in fluid communication with the first outlet port, a second end position with the at least one inlet port in fluid communication with the first outlet port, and an intermediate position between the first end position and the second end position with the at least one inlet port in fluid communication with the second outlet port. The biasing element may provide a biasing force to move the failsafe pilot selector valve to the first end position. The pilot selector valve can alternately provide pilot fluid to primary and redundant control elements of a redundantly controlled system in fluid communication with the outlet ports.

Abstract translation: 故障安全导向换向阀可以包括至少一个入口端口，第一出口端口，第二出口端口和偏置元件。 故障安全导向选择阀可以具有第一端部位置，其中至少一个入口端口与第一出口端口流体连通，第二端部位置与至少一个入口端口与第一出口端口流体连通， 所述第一端部位置和所述第二端部位置之间的位置与所述至少一个入口端口与所述第二出口端口流体连通。 偏置元件可以提供偏置力以将故障保护先导换向阀移动到第一端位置。 先导选择阀可以交替地将先导流体提供给与出口端口流体连通的冗余控制系统的主要和冗余控制元件。

公开(公告)号：US20150198183A1

公开(公告)日：2015-07-16

申请号：US14155074

申请日：2014-01-14

Applicant: Caterpillar Inc.

Inventor： Paul Moser ,  Jeffrey Allan Digby ,  Dennis Ray Barber ,  Wendell D. Stahl

IPC: F15B13/06 ,  F16K31/06 ,  F16K11/07

CPC classification number: F15B13/06 ,  F15B20/00 ,  F15B2211/20576 ,  F15B2211/41518 ,  F15B2211/635 ,  F15B2211/67 ,  F15B2211/8626 ,  F15B2211/8636 ,  F15B2211/8757 ,  F16K11/07 ,  F16K31/0613 ,  Y10T137/0318 ,  Y10T137/86574 ,  Y10T137/86622

Abstract: A failsafe pilot selector valve may include at least one inlet port, a first outlet port, a second outlet port, and a biasing element. The failsafe pilot selector valve may have a first end position with the at least one inlet port in fluid communication with the first outlet port, a second end position with the at least one inlet port in fluid communication with the first outlet port, and an intermediate position between the first end position and the second end position with the at least one inlet port in fluid communication with the second outlet port. The biasing element may provide a biasing force to move the failsafe pilot selector valve to the first end position. The pilot selector valve can alternately provide pilot fluid to primary and redundant control elements of a redundantly controlled system in fluid communication with the outlet ports.

Abstract translation: 故障安全导向换向阀可以包括至少一个入口端口，第一出口端口，第二出口端口和偏置元件。 故障安全导向选择阀可以具有第一端部位置，其中至少一个入口端口与第一出口端口流体连通，第二端部位置与至少一个入口端口与第一出口端口流体连通， 所述第一端部位置和所述第二端部位置之间的位置与所述至少一个入口端口与所述第二出口端口流体连通。 偏置元件可以提供偏置力以将故障保护先导换向阀移动到第一端位置。 先导选择阀可以交替地将先导流体提供给与出口端口流体连通的冗余控制系统的主要和冗余控制元件。

公开(公告)号：US20140182277A1

公开(公告)日：2014-07-03

申请号：US13727831

申请日：2012-12-27

Applicant: CATERPILLAR INC.

Inventor： Beau Kuipers ,  Wendell D. Stahl ,  Edward W. Mate ,  Joshua M. Adams ,  Shawn I. Cullen

IPC: B62D5/09

CPC classification number: B62D5/09 ,  B62D5/091 ,  B62D9/00 ,  B62D12/00

Abstract: An electro-hydraulic steering system for an articulated machine includes an electrical circuit and a hydraulic circuit. The electrical circuit includes a controller, an electro-hydraulic valve assembly, and a spool position system. The hydraulic circuit includes a pump, at least one cylinder in selective fluid communication with the pump, and the valve assembly. The controller includes a computer-readable storage medium storing a steering system monitoring application which performs several steps. A desired flow of pressurized fluid to each cylinder and a desired spool position for the spool of the electro-hydraulic valve assembly, based upon the desired flow of pressurized fluid, are determined. The desired spool position and an actual spool position are compared to determine a spool-based flow error, which is summed over a period of time to determine a cumulative spool-based flow error. An event warning is issued when the cumulative spool-based flow error exceeds a threshold.

Abstract translation: 铰接式机械的电动液压转向系统包括电路和液压回路。 电路包括控制器，电动液压阀组件和阀芯位置系统。 液压回路包括泵，至少一个与泵选择性流体连通的气缸和阀组件。 控制器包括存储执行几个步骤的转向系统监视应用的计算机可读存储介质。 确定加压流体到每个气缸的期望流量以及基于加压流体的期望流量的电液压阀组件的阀芯的期望阀芯位置。 比较所需的阀芯位置和实际阀芯位置以确定基于阀芯的流量误差，该误差在一段时间内相加以确定基于阀芯的累积流量误差。 当累积的基于假脱机的流量错误超过阈值时，将发出事件警告。