Hydraulic pump with variable flow and variable pressure and electric control

A pump system including a control system for controlling a variable flow pump for controlling oil flow and oil pressure in a hydraulic circuit in an engine, comprising:

• a pump member;
• an eccentric ring disposed in a housing, said eccentric ring capable of controlling the flow generated by the pump member;
• a decrease chamber formed in said pump system by said eccentric ring and said housing, said decrease chamber in continuous fluid communication with the discharge of said pump member and operably associated with said eccentric ring such that as the amount of fluid in said decrease chamber increases and the amount of pressure in said decrease chamber increases, said eccentric ring moves in said housing, and the displacement of said pump system will decrease;
• a channel extending through said pump system, said channel operable for placing said discharge of said pump member in continuous fluid communication with said decrease chamber for providing pressurized fluid to said decrease chamber;
• an increase chamber formed in said pump system by said eccentric ring and said housing, and operably associated with said eccentric ring such that as the amount of fluid in said increase chamber increases and the amount of pressure in said increase chamber increases, said eccentric ring moves in said housing, and the displacement of said pump system will increase;
• a solenoid valve system including a solenoid valve stage portion and a pressure regulator valve stage portion, said pressure regulator valve stage portion in fluid communication with said increase chamber, and said pressure regulator valve stage portion in fluid communication with the discharge of said pump member;
• a port for providing fluid communication between said solenoid valve stage portion and said pressure regulator valve stage portion;
• wherein the solenoid valve system is operably associated with the pump member;
• wherein the pressure regulator valve stage portion is operably associated with the eccentric ring for selectively controlling the flow generated by the pump member by providing a reference pressure to said increase chamber that acts against the pressure in said decrease chamber to determine the position of said eccentric ring;
• and
• an electronic control unit operably associated with the solenoid valve stage portion, wherein the electronic control unit is selectively operable to provide an input control signal to the solenoid valve stage portion for controlling oil flow and oil pressure and said solenoid valve stage portion is operable for at least partially controlling the amount of fluid flow through said port.

A pump system including a control system for controlling a variable flow pump for controlling oil flow and oil pressure in a hydraulic circuit in an engine, comprising:

• a pump member;
• an eccentric ring disposed in a housing, said eccentric ring capable of controlling the flow generated by the pump member;
• wherein the pump member is a vane pump and the eccentric ring is at least part of the vane pump, wherein the vane pump and the eccentric ring operate to control the flow of oil to the main oil gallery of the engine;
• a decrease chamber formed in said pump system by said eccentric ring and said housing, said decrease chamber in continuous fluid communication with the discharge of said pump member and operably associated with said eccentric ring such that as the amount of fluid in said decrease chamber increases and the amount of pressure in said decrease chamber increases, said eccentric ring moves in said housing, and the displacement of said pump system will decrease;
• a channel extending through said pump system, said channel operable for placing said discharge of said pump member in continuous fluid communication with said decrease chamber for providing pressurized fluid to said decrease chamber;
• an increase chamber formed in said pump system by said eccentric ring and said housing, and operably associated with said eccentric ring such that as the amount of fluid in said increase chamber increases and the amount of pressure in said increase chamber increases, said eccentric ring moves in said housing, and the displacement of said pump system will increase;
• a solenoid valve system including a solenoid valve stage portion and a pressure regulator valve stage portion, said pressure regulator valve stage portion in fluid communication with said increase chamber, and said pressure regulator valve stage portion in fluid communication with the discharge of said pump member;
• a port for providing fluid communication between said solenoid valve stage portion and said pressure regulator valve stage portion;
• wherein the solenoid valve system is operably associated with the pump member;
• wherein the pressure regulator valve stage portion is operably associated with the eccentric ring for selectively controlling the flow generated by the pump member by providing a reference pressure to said increase chamber that acts against the pressure in said decrease chamber to determine the position of said eccentric ring;
• and
• an electronic control unit operably associated with the solenoid valve portion, wherein the electronic control unit is selectively operable to provide an input control signal to the solenoid valve portion for controlling oil flow and oil pressure, and said solenoid valve stage portion is operable for at least partially controlling the amount of fluid flow through said port.