Controllable coolant pump with electric auxiliary pump
AssigneeNidec Gpm GmbH
InventorFranz PAWELLEK
Life of this patent
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Abstract
A controllable coolant pump includes a pump housing, an impeller, a pump shaft rotatably mounted in the pump housing and on free ends of which a belt pulley on one side and the impeller on an opposite side are arranged in a rotationally fixed manner, an annular slider in a pump chamber and biased by a compression spring to control an outflow region of the impeller of the coolant pump, and an electric auxiliary pump to draw coolant from an impeller side chamber and deliver the coolant with increased pressure to a side of the annular slider facing away from the impeller in such a way that the annular slider is displaceable against a force of the compression spring.
Claims10
A controllable coolant pump comprising:
- a pump housing;
- an impeller;
- a pump shaft rotatably mounted in the pump housing and on free ends of which a belt pulley on one side and the impeller on an opposite side are arranged in a rotationally fixed manner;
- an annular slider in a pump chamber and biased by a compression spring to control an outflow region of the impeller of the coolant pump;
- and
- an electric auxiliary pump to draw coolant from an impeller side chamber and deliver the coolant with increased pressure to a side of the annular slider facing away from the impeller in such a way that the annular slider is displaceable against a force of the compression spring.
Dependencies are inferred from the claim text.