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公开(公告)号：US20150033719A1
公开(公告)日：2015-02-05
申请号：US13957052
申请日：2013-08-01
Applicant: Caterpillar Inc.
Inventor： Keith Edward Lawrence , John James Krone , Nick William Biggs , Karl Arthur Kirsch , Yuya Kanenawa , Tetsuya Yoshino , Magomed Gabibulayev
IPC: F15B11/10 , F15B13/042
CPC classification number: F15B21/047 , E02F3/435 , E02F9/2207 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B2211/20546 , F15B2211/30505 , F15B2211/30565 , F15B2211/31558 , F15B2211/329 , F15B2211/40507 , F15B2211/41581 , F15B2211/50518 , F15B2211/5159 , F15B2211/575 , F15B2211/6346 , F15B2211/6355 , F15B2211/88
Abstract: In order to avoid cavitation in a boom cylinder head end at the beginning of a dig cycle, fluid from an alternate source is supplied to the head end before or in addition to fluid supplied by the main boom-up hydraulic circuit. In one embodiment, an electronic hydraulic valve, related sensors, and control system determines the beginning of a dig operation and uses fluid at an intermediate pressure to rapidly provide fluid to a boom head end cylinder to prevent voiding or cavitation before fluid under high pressure from the main pump can be brought to the cylinder. An on/off fluid switch is activated early in a dig operation to address low pressure at the boom cylinder head end and provide an alternate path for fluid into the cylinder in reaction to the boom being lifted by a motion of the stick and bucket in contact with the work surface.
Abstract translation: 为了避免挖掘循环开始时起重臂气缸头端部的气蚀，来自替代源的流体在由主动臂上升液压回路供给的流体之前或之外被提供给头端。 在一个实施例中，电子液压阀，相关传感器和控制系统确定挖掘操作的开始并且使用中间压力的流体来快速地向动臂头端部气缸提供流体，以防止在高压下的流体之间的空洞或空化 主泵可以带到气缸。 在挖掘操作早期开启/关闭流体开关以解决动臂油缸头端的低压，并提供流体进入气缸的替代路径，以响应于通过杆和铲斗的接触而被提升的动臂被接触 与工作表面。
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公开(公告)号：US09394929B2
公开(公告)日：2016-07-19
申请号：US13957052
申请日：2013-08-01
Applicant: Caterpillar Inc.
Inventor： Keith Edward Lawrence , John James Krone , Nick William Biggs , Karl Arthur Kirsch , Yuya Kanenawa , Tetsuya Yoshino , Magomed Gabibulayev
CPC classification number: F15B21/047 , E02F3/435 , E02F9/2207 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B2211/20546 , F15B2211/30505 , F15B2211/30565 , F15B2211/31558 , F15B2211/329 , F15B2211/40507 , F15B2211/41581 , F15B2211/50518 , F15B2211/5159 , F15B2211/575 , F15B2211/6346 , F15B2211/6355 , F15B2211/88
Abstract: In order to avoid cavitation in a boom cylinder head end at the beginning of a dig cycle, fluid from an alternate source is supplied to the head end before or in addition to fluid supplied by the main boom-up hydraulic circuit. In one embodiment, an electronic hydraulic valve, related sensors, and control system determines the beginning of a dig operation and uses fluid at an intermediate pressure to rapidly provide fluid to a boom head end cylinder to prevent voiding or cavitation before fluid under high pressure from the main pump can be brought to the cylinder. An on/off fluid switch is activated early in a dig operation to address low pressure at the boom cylinder head end and provide an alternate path for fluid into the cylinder in reaction to the boom being lifted by a motion of the stick and bucket in contact with the work surface.
Abstract translation: 为了避免挖掘循环开始时起重臂气缸头端部的气蚀，来自替代源的流体在由主动臂上升液压回路供给的流体之前或之外被提供给头端。 在一个实施例中，电子液压阀，相关传感器和控制系统确定挖掘操作的开始并且使用中间压力的流体来快速地向动臂头端部气缸提供流体，以防止在高压下的流体之间的空洞或空化 主泵可以带到气缸。 在挖掘操作早期开启/关闭流体开关以解决动臂油缸头端的低压，并提供流体进入气缸的替代路径，以响应于通过杆和铲斗的接触而被提升的动臂被接触 与工作表面。
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