Pierburg Pump Technology Gmbh

Pierburg Pump Technology Italy S.p.a.

Bernardo Celata

Giacomo Armenio

Maurizio Moriglia

Nicola Celata

A variable lubricant vane pump which provides a pressurized lubricant for an engine includes a pump housing comprising a pump chamber. The pump chamber comprises pump compartments which rotate from a charge zone to a discharge zone. The pressurized lubricant is discharged from the pump compartments into an outlet cavity. A control ring envelopes the pump chamber and shifts between high and a low pumping volume position. A pump rotor comprises radially slidable vanes which rotate in the control ring. A pressure control chamber pushes the control ring into the high pumping volume direction. A control valve connects or disconnects the pressure control chamber to a lubricant tank. A pilot chamber pushes the control ring into the low pumping volume direction. A pilot chamber channel connects the outlet cavity with the pilot chamber. A control chamber channel connects the outlet cavity with the pressure control chamber.

Variable lubricant vane pump

A variable displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine includes a shiftable control ring, a hydraulic control chamber which directly actuates the control ring, a pump rotor comprising a plurality of slidable vanes which rotate in the control ring, a control chamber wall, a temperature control opening arranged in the control chamber wall, and a temperature control valve which connects or disconnects the temperature control opening to an atmospheric pressure. The temperature control valve comprises a valve plunger which is axially shiftable so as to block or leave open a lubricant passage, and a first bimetal actuator sheet which directly actuates the valve plunger. The first bimetal actuator sheet comprises a first switching temperature. The valve plunger is in an open position if a lubricant temperature exceeds the first switching temperature.

Variable displacement lubricant pump

A variable displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine includes a control ring configured to be shiftable, a pump rotor comprising a plurality of slidable vanes which are configured to rotate in the control ring, a hydraulic control chamber configured to directly actuate the control ring, a valve bore, and a temperature control valve configured to connect or disconnect the temperature control opening to an atmospheric pressure. The hydraulic control chamber comprises a side wall comprising a temperature control opening arranged therein. The temperature control valve comprises a switching strip which comprises a switching temperature. The switching strip is configured to be in an open position if a temperature is below the switching temperature, and to be in a closed position if the temperature is above the switching temperature so as to close the valve bore.

Variable displacement lubricant pump for an internal combustion engine with a temperature control valve

A pumping system having a pump, such as a variable-displacement vane pump or a gear pump. The pump in turn has hydraulic pressure-control dissipating devices for imparting to the oil in a first control chamber a pressure lower than the pressure of a second chamber. The system is characterized in that the first control chamber of the pump has a channel connecting the first control chamber to an oil inlet. And the channel has an opening/closing device controlled selectively by an engine operating parameter, such as oil temperature.

Pumping system

A variable-eccentricity vane pump having a rotor fitted with blades; an adjusting ring housing the rotor; elastic means for forcing the adjusting ring into a maximum-eccentricity position with respect to the rotor; a first sliding member connected to the adjusting ring and which slides in fluidtight manner inside a first chamber connected hydraulically to a delivery conduit of the pump; and a second sliding member connected to the adjusting ring and which slides in fluidtight manner inside a second chamber connected hydraulically to a delivery conduit of the pump. The first sliding member is connected to the adjusting ring on the opposite side to the elastic means and the second sliding member; and the second chamber is smaller than the first chamber, and has a drain opening formed in a lateral wall on which the second sliding member slides.

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Leghorn, Italy

Bernardo Celata