A hydraulic system for a work machine, comprising a first and a second hydraulic actuator: a first and a second hydraulic machine for providing hydraulic fluid to at least one of the first and the second actuator via a first and a second priority valve (V1, V2), respectively. The first and second priority valves are controlled by a pressure drop [delta]P over the inlet valve of the first actuator such that when [delta]P is lower than a first threshold value T1, a flow of hydraulic fluid is allowed only to the first actuator. The second priority valve allows a flow of hydraulic fluid to both the first and second actuator for a pressure drop higher than T1. The first priority valve (V1) is further configured to allow a flow of hydraulic fluid to both of the first and second actuator for a pressure drop higher than a second threshold value T2 which is higher than T1.
Twin priority valve
2015-06-24
Patent
Electronic Resource
English
Priority valve assembly and method for operating a priority valve assembly
European Patent Office | 2015
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