Patent ID: 7334543

Claim:
A coolant pump ( 1 ) for a coolant circuit ( 2 ) of an automotive internal combustion engine ( 10 ) including at least a radiator circuit ( 4 ) and a bypass circuit ( 8 ), which comprises: a coolant pump housing ( 14 ) having an intake pipe ( 22 ) for the supply (ZK) from the radiator ( 6 ), a bypass pipe ( 24 ) for the supply (ZB) from the bypass circuit ( 8 ), and a pressure pipe ( 34 ) for the supply (ZM) of coolant to the automotive vehicle engine ( 10 ), a coolant pump electric motor ( 26 ) arranged in the coolant pump housing ( 14 ), the motor housing ( 28 ) of which is situated in the coolant flow, and which drives a pump impeller ( 32 ) through the intermediary of a pump shaft ( 30 ), and a directional control valve ( 40 ) integrated into the coolant pump housing ( 14 ), characterized in that the intake pipe ( 22 ) is arranged in the area ( 42 ) of the end ( 44 ) of the pump motor ( 26 ) facing away from the pump impeller ( 32 ), the bypass pipe ( 24 ) is arranged in an area ( 46 ) situated downstream of the intake pipe ( 22 ), the pressure pipe ( 34 ) is arranged in an area ( 48 ) situated downstream of the bypass pipe ( 24 ), and only the coolant (KZK) that can be taken in by the intake pipe ( 22 ) as a supply (ZK) from the radiator ( 6 ) may be taken past the pump motor ( 26 ) in a peripheral flow ( 50 ) through a flow channel ( 56 ) defined by an outer wall ( 52 ) of the pump motor housing ( 28 ) and a facing inner wall ( 54 ) of the pump housing ( 14 ) and a facing inner wall ( 60 ) of the directional control valve ( 40 ).