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1. 发明公开

EP3243965A1 CONTROLLING AN ELECTRIC PROPORTIONAL VALVE 有权
标题翻译：控制电比例阀
公开(公告)号：EP3243965A1
公开(公告)日：2017-11-15
申请号：EP16169558.0
申请日：2016-05-13
申请人： Caterpillar Inc.
发明人： JACOB, Sebastian
IPC分类号： E02F9/22 , F15B11/08
CPC分类号： E02F9/2296 , E02F9/2228 , E02F9/2235 , F15B11/05 , F15B11/08 , F15B2211/20546 , F15B2211/30525 , F15B2211/3144 , F15B2211/327 , F15B2211/351 , F15B2211/353 , F15B2211/6309 , F15B2211/6313 , F15B2211/665 , F15B2211/6652 , F15B2211/6654 , F15B2211/7051
摘要： A method for controlling an electric proportional valve (42) of a hydraulic excavator attachment (28) is disclosed. The electric proportional valve (42) is controllable based on an electric input to the electric proportional valve (42). The electric proportional valve (42) is connected to a hydraulic actuator (34) for actuating the hydraulic excavator attachment (28) and to a hydraulic pump (36) for providing a flow of hydraulic fluid to the electric proportional valve (42). The method comprises operating the hydraulic pump (36) at a desired flow rate depending on the hydraulic excavator attachment (28); setting a desired pressure differential (Δp) over the electric proportional valve (42); determining an actual pressure differential (Δp') over the electric proportional valve (42); determining a pressure deviation (Δp - Δp') between the desired pressure differential (Δp) and the actual pressure differential (Δp'); and operating the electric proportional valve (42) such that the actual pressure differential (Δp') approaches the desired pressure differential (Δp).
摘要翻译：公开了一种用于控制液压挖掘机附件（28）的电比例阀（42）的方法。电比例阀（42）可基于对电比例阀（42）的电输入进行控制。电比例阀（42）连接到用于致动液压挖掘机附件（28）的液压致动器（34）以及用于向液压泵（36）提供液压流体流到电比例阀（42）的液压泵。该方法包括根据液压挖掘机附件（28）以期望的流量操作液压泵（36）; 在电比例阀（42）上设定所需的压差（Δp）; 确定所述电比例阀（42）上的实际压差（Δp'）; 确定期望压差（Δp）和实际压差（Δp'）之间的压力偏差（Δp-Δp'）; 和操作电比例阀（42），使得实际压差（Δp'）接近期望压差（Δp）。

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