Pierburg Pump Technology Gmbh

Matteo Gasperini

Raffaele Squarcini

Giacomo Armenio

Massimiliano Lazzerini

Nicola Novi

Alessandro Testa

Stefano Fiorini

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.

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Lavaiano-Fraz. Lari, Italy

Matteo Gasperini