Direct controlled variable displacement pumps with thermostatically controlled bypass

A system comprising:

• an inlet line;
• an outlet line;
• a variable displacement pump (VDP) in fluid communication with the inlet line and with the outlet line;
• a bypass valve (BPV) comprising:
• a BPV housing;
• a valve member in the BPV housing;
• a BPV inlet formed in the BPV housing and in fluid communication with the outlet line;
• a BPV outlet formed in the BPV housing, wherein the BPV outlet is in fluid communication with the BPV inlet when the valve member is in an open position within the BPV housing, and wherein the BPV outlet is fluidically disconnected from the BPV inlet when the valve member is in a closed position in the BPV housing;
• a flow port formed in a backside of the BPV housing;
• and
• a thermostatic actuator between the valve member and the backside of the BPV housing;
• a bypass line fluidically connecting the BPV outlet to the inlet line upstream of the VDP, and
• a sensing line fluidically connecting the flow port to the bypass line.