Patent ID: 8671893
Filing Date: 2014-03-18
Classification: F04D,F05D

Abstract:
1. A controllable coolant pump for a cooling circuit of an internal combustion engine, comprising a pump housing, in which a pump shaft embodied as a hollow shaft is rotationally supported with an allocated impeller, a rotation of the impeller conveying a coolant via a suction connection into a spiral port of the coolant pump, an axially displaceable guide disk allocated to the impeller in order to influence a volume conveyed that cooperates with an actuating mechanism, and is connected in a torque-proof fashion to a push rod, the guide disk is displaceable between two end positions defined by a rear wall and a pump cover of the impeller and guided on the pump shaft, the actuating mechanism comprises a displacement pump integrated in the coolant pump, with a coolant flow of the displacement pump being fed to an actuator for a continuous adjustment of the guide disk via a control valve, said actuator includes a pressure chamber located in the pump shaft in which a piston connected to the push rod is guided in a displaceable fashion.