Automotive variable mechanical lubricant pump

An automotive variable mechanical lubricant pump for providing a pressurized lubricant for an internal combustion engine, the automotive variable mechanical lubricant pump comprising:

• a lubricant delivery port which is fluidically connected to the internal combustion engine;
• a control ring which is configured to shift between a maximum eccentricity position and a minimum eccentricity position;
• a pump rotor comprising a plurality of slidable vanes which are configured to rotate in the control ring;
• a control ring preload spring which is configured to push the control ring into the maximum eccentricity position;
• a single hydraulic control chamber which is configured to push the control ring into the minimum eccentricity position;
• a pressure galley pump port which is fluidically connected to the internal combustion engine, the pressure galley pump port being configured to charge the single hydraulic control chamber with a galley pressure so as to control a remote galley pressure of the internal combustion engine via a control chamber pressure in the single hydraulic control chamber;
• an integrated overpressure valve which is in a fluidic association with the lubricant delivery port, the integrated overpressure valve being configured to open if an applied lubricant pressure exceeds a predefined maximum pressure limit;
• and
• a hydraulic control circuit comprising a hydraulic control valve which comprises a valve inlet port, the hydraulic control valve being configured to directly regulate a control chamber pressure,
• wherein,
• the valve inlet port of the hydraulic control valve is directly charged with the remote galley pressure of the internal combustion engine via the pressure galley pump port,
• the hydraulic control valve further comprises a valve preload spring, a valve control port, and a valve plunger,
• the valve plunger comprises a first active plunger surface and a valve body which is configured to open and to close the valve control port,
• the valve preload spring is configured to push the valve body into an open valve position, and
• the first active plunger surface is charged with the galley pressure of the pressure galley pump port.