Direct controlled variable displacement valves with dual set point pressure relief

A system comprising:

• an inlet line;
• an outlet line downstream of the inlet line;
• a variable displacement pump (VDP) comprising:
• an inlet fluidically connected to the inlet line;
• and
• an outlet fluidically connected to the outlet line;
• a relief valve (RV) comprising:
• a housing comprising:
• a first end;
• and
• a second end;
• a valve member in the housing between the first end and the second end of the housing;
• a biasing member in the housing and biasing the valve member to a first position of the valve member;
• an RV inlet formed in the second end of the housing and fluidically connected to the outlet line downstream of an EHSV inlet connection line;
• an RV outlet formed in the housing and fluidically connected to the inlet line upstream of the VDP by a bypass line, wherein the RV outlet is fluidically connected to the RV inlet when the valve member is in a second position, and the RV outlet is fluidically disconnected from the RV inlet when the valve member is in the first position;
• and
• an RV port formed in the first end of the housing and fluidically connected to the bypass line;
• an orifice fluidically between the RV port and the bypass line;
• an actuator comprising:
• an actuator inlet fluidically connected to the outlet line;
• and
• an actuator outlet fluidically connected to the RV port by an RV control line;
• a controller operatively connected to the actuator to selectively fluidically connect the actuator inlet to the actuator outlet.