Disclosed is an electro-hydraulic relay valve and corresponding valve assembly for a SAHR brake. First actuators are arranged to act on a first end of a floating valve spool and second actuators are arranged to act on a second end of the valve spool. One of the second actuators can receive hydraulic pressure from a pilot valve. In a first valve position, the pressure supply port communicates with the working port and the tank port is closed. In a second valve position, the pressure supply port is closed and communicates via a first sense line with one of the first actuators, the working port directs pressure to the tank port, the tank port communicates via a second sense line with another of the first actuators, and the working port communicates via a third sense line with one of the second actuators. In a central position, all three ports are closed.
ELECTRO-HYDRAULIC VALVE FOR PROPORTIONAL CONTROL OF SPRING APPLY HYDRAULIC RELEASE (SAHR) BRAKES
2024-06-20
Patent
Electronic Resource
English
ELECTRO-HYDRAULIC VALVE FOR PROPORTIONAL CONTROL OF SPRING APPLY HYDRAULIC RELEASE (SAHR) BRAKES
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