公开(公告)号：US20230063904A1

公开(公告)日：2023-03-02

申请号：US17795651

申请日：2020-12-30

Applicant: Danfoss Power Solutions II Technology A/S

Inventor： Kenneth Marshall BEFUS

IPC: F15B19/00 ,  B62D5/09 ,  B62D5/08 ,  B62D5/06 ,  F15B13/02

Abstract: A system and method for detecting the functional state of a piloted or direct-operated isolation valve in a hydraulic circuit is presented. In some examples the hydraulic circuit is a steering circuit and the isolation valve provides selective isolation between a 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. When the isolation valve assembly is moved to one of the first and second positions, an inlet port and a pressure sensing port of the isolation valve assembly are placed in fluid communication with each other. When the isolation valve assembly is moved to the other of the first or second position, a second inlet port and the pressure sensing port are placed in fluid communication.