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公开(公告)号：US20140298798A1
公开(公告)日：2014-10-09
申请号：US13856733
申请日：2013-04-04
Applicant: CATERPILLAR INC.
Inventor： Daryl James Belshan , Beau Daniel Kuipers , Edward William Mate , Gene Richard St. Germain
IPC: B62D5/06
Abstract: A steering control system includes a steering circuit, a primary control circuit and a redundant control circuit. The primary control circuit includes primary proportional control valves, and a primary pilot valve having a thermal bleed of pilot fluid to warm the primary pilot valve when not operating to control the steering circuit. The redundant control circuit includes secondary proportional control valves, and a pressure reducing valve having a thermal bleed orifice allowing fluid flow to warm the pressure reducing valve when not operating to control the steering circuit. The thermal bleeds may also flow past the proportional control valves to raise their temperatures. The circuits of the steering control system are contained in a single valve group housing.
Abstract translation: 转向控制系统包括转向电路，主控制电路和冗余控制电路。 主控制电路包括初级比例控制阀和主导向阀，当未操作以控制转向回路时，主导阀具有先导流体的热泄放以加热主导阀。 冗余控制电路包括二次比例控制阀，以及具有热泄漏孔的减压阀，当不操作以控制转向回路时允许流体流动来加热减压阀。 热过滤器也可能流经比例控制阀以升高其温度。 转向控制系统的回路包含在单个阀组壳体中。
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公开(公告)号：US09248854B2
公开(公告)日：2016-02-02
申请号：US13856733
申请日：2013-04-04
Applicant: Caterpillar Inc.
Inventor： Daryl James Belshan , Beau Daniel Kuipers , Edward William Mate , Gene Richard St. Germain
Abstract: A steering control system includes a steering circuit, a primary control circuit and a redundant control circuit. The primary control circuit includes primary proportional control valves, and a primary pilot valve having a thermal bleed of pilot fluid to warm the primary pilot valve when not operating to control the steering circuit. The redundant control circuit includes secondary proportional control valves, and a pressure reducing valve having a thermal bleed orifice allowing fluid flow to warm the pressure reducing valve when not operating to control the steering circuit. The thermal bleeds may also flow past the proportional control valves to raise their temperatures. The circuits of the steering control system are contained in a single valve group housing.
Abstract translation: 转向控制系统包括转向电路，主控制电路和冗余控制电路。 主控制电路包括初级比例控制阀和主导向阀，当未操作以控制转向回路时，主导阀具有先导流体的热泄放以加热主导阀。 冗余控制电路包括二次比例控制阀，以及具有热泄漏孔的减压阀，当不操作以控制转向回路时允许流体流动来加热减压阀。 热过滤器也可能流经比例控制阀以升高其温度。 转向控制系统的回路包含在单个阀组壳体中。
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公开(公告)号：US09050999B2
公开(公告)日：2015-06-09
申请号：US13750635
申请日：2013-01-25
Applicant: Caterpillar Inc.
Inventor： Beau Daniel Kuipers , Edward William Mate , David Arthur Mork
Abstract: A steering system and method for providing a force feedback to an operator input device are disclosed. The method may determine an actual position of the operator input device. The method may determine a desired steering mechanism position of a steering mechanism based on the actual position of the operator input device. The method may determine an actual steering mechanism position of the steering mechanism. The method may compare the actual steering mechanism position to the desired steering mechanism position and to a previous desired steering mechanism position. The method may generate a command that selectively activates force feedback to the operator input device based on the comparison.
Abstract translation: 公开了一种用于向操作者输入装置提供力反馈的转向系统和方法。 该方法可以确定操作者输入装置的实际位置。 该方法可以基于操作者输入装置的实际位置来确定转向机构的期望转向机构位置。 该方法可以确定转向机构的实际转向机构位置。 该方法可以将实际的转向机构位置与期望的转向机构位置和先前期望的转向机构位置进行比较。 该方法可以生成基于比较选择性地激活对操作者输入装置的力反馈的命令。
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公开(公告)号：US20210340999A1
公开(公告)日：2021-11-04
申请号：US16864210
申请日：2020-05-01
Applicant: Caterpillar Inc.
Abstract: An accumulator includes an accumulator housing defining a first end, a second end opposite to the first end, and a hollow chamber. The accumulator also includes a piston slidably disposed within the hollow chamber and adapted to displace between the first and second ends. The piston divides the hollow chamber into a gaseous chamber proximate to the first end of the accumulator housing and a hydraulic chamber proximate to the second end of the accumulator housing. Further, the piston defines a first side surface in communication with the gaseous chamber and a second side surface spaced apart from the first side surface. The second side surface is in communication with the hydraulic chamber. A cavity of the piston is in communication with the second side surface and extends from the second side surface towards the first side surface. The cavity is in fluid communication with the hydraulic chamber.
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