The invention provides a system and a method for detecting the functional state of a pilot-operated or direct-acting isolation valve in a hydraulic circuit. In some examples, the hydraulic circuit is a steering circuit, and the isolation valve provides selective isolation between the hydraulic actuator and one or more metering valves. In some examples, the isolation valve assembly is movable between a first position in which fluid flow between the metering valve and the actuator is enabled and a second position in which fluid flow between the metering valve and the actuator is blocked. The inlet port and the pressure sensing port of the isolation valve assembly are in fluid communication with each other when the isolation valve assembly is moved to one of the first position and the second position. The second inlet port and the pressure sensing port are in fluid communication when the isolation valve assembly is moved to the other of the first position or the second position.
本发明提出了一种检测液压回路中的先导式或直动式隔离阀的功能状态的系统和方法。在一些示例中,该液压回路是转向回路,并且该隔离阀在液压致动器与一个或多个计量阀之间提供选择性的隔离。在一些示例中,该隔离阀组件能够在第一位置与第二位置之间移动,在该第一位置中,该计量阀和该致动器之间的流体流动被启用,在该第二位置中,该计量阀和该致动器之间的流体流动被阻断。当该隔离阀组件移动到该第一位置和第二位置之一时,该隔离阀组件的入口端口和压力感测端口处于彼此流体连通。当该隔离阀组件移动到第一位置或第二位置中的另一位置时,第二入口端口和压力感测端口处于流体连通。
Integrated pressure diagnostics for off-highway steering isolation circuits
用于非公路转向隔离回路的集成压力诊断
2022-09-06
Patent
Electronic Resource
Chinese
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