Pierburg Pump Technology Gmbh

Stefano Fiorini

Raffaele Squarcini

Massimiliano Lazzerini

Giorgio Peroni

Matteo Gasperini

Eric Trombley

Brandon Woltz

Gabriella Ford

A variable displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine includes a shiftable control ring. The control ring comprises a plurality of pump chambers and a pressure relief valve. The plurality of pump chambers rotate through a charge zone and a discharge zone. A pump rotor comprises radially slidable vanes. The pump rotor rotates in the control ring. A pretensioning element pushes the control ring to a high pumping volume direction. A first control chamber pushes the control ring to a low pumping volume direction. A second control chamber pushes the control ring to the high pumping volume direction. A pump outlet is connected to the first control chamber. A throttle valve connects the first control chamber with the second control chamber. The pressure relief valve of the control ring connects the discharge zone to the second control chamber.

Variable displacement lubricant pump

Growing community of inventors

Rochester Hills, MI, United States of America

Stefano Fiorini