Coolant pump, in particular, convection-cooled electric coolant pump and a method that combines a switching valve.

摘要

The present invention proposes a coolant pump coolant circuit of an internal combustion engine of a motor vehicle, including the bypass circuit and the radiator circuit of at least one. Coolant pumps include (14) the coolant pump housing provided with suction pipe (22), a bypass pipe (24), a pressure pipe (34). Coolant pump electric motor arranged in (14) in the coolant pump housing, arranged on the inside of the coolant flow the motor housing (28) to (26), via (30) the pump shaft pump impeller (32 I drive a). Integrated to (14) in the coolant pump housing, switching valve (40). And proposes to place in the end regions facing away of the pump motor, the pump impeller (32), suction tube (22). In addition, I will be placed in the downstream region of the suction pipe (22), the bypass pipe. In addition, I will be placed in the downstream region of the bypass pipe (24), pressure tube (34). Finally, only the cooling fluid can be incorporated by the radiator through the suction tube, to be guided past the pump motor turned on (50) the flow of the peripheral, in particular, outer wall pump motor housing (28) (52) and, is adapted to be guided through the (56) flow path limited inner wall (40) by (60) and the switching valve and / or the inner wall of the pump housing and (54). The invention also relates to corresponding methods also demonstrate.