Patent ID: 8459215

Claim:
A coolant pump having a regulatable coolant flow that can be placed into a cooling circuit of an internal combustion engine, comprising: a pump housing in which a hollow pump shaft with an associated impeller is rotatably mounted such that rotation of the impeller conveys coolant via an intake connection into a spiral duct of the coolant pump, a displacement volume of the coolant pump being adjustable by an axially displaceable guide disk allocated to the impeller that is actuatable via an actuating mechanism, the guide disk is connected in rotationally rigid fashion to a connecting rod that is held in the pump shaft and is displaceable between two end positions defined by a rear wall of the housing and a pump cover for the impeller, the actuating mechanism includes a displacement pump integrated in the coolant pump, as well as an actuator comprised of a piston-cylinder unit having a pressure chamber inside the pump housing complementarily positioned to an outer region of the guide disk, in which a piston that moves together with the guide disk is guided, and a control valve that controls a coolant flow of the displacement pump that charges the pressure chamber.