Device for regulating a coolant flow and cooling system

Abstract

A device ( 1 ) for regulating a coolant flow in a cooling system of an internal combustion engine ( 2 ) with a valve arrangement ( 3 ) that includes a rotary disk valve ( 4 ) for switching at least one cooling circuit ( 5, 6 ) and/or a bypass circuit ( 7 ), as well as a coolant pump ( 8 ) that is constructed as an impeller pump and is connected on the suction side to the valve arrangement ( 3 ). The coolant pump ( 8 ) has an axial adjustable guide plate ( 11 ) on an inside between two end stops ( 9, 10 ) for closing and releasing a pump outlet ( 12 ). The guide plate ( 11 ) for the axial adjustment is indirectly coupleable by a lead screw thread ( 13 ) to a drive shaft ( 14 ) of the rotary disk valve ( 4 ). A cooling system for an internal combustion engine ( 2 ) with such a device ( 1 ) is also provided.

1 . A device for regulating a coolant flow in a cooling system of an internal combustion engine comprising a valve arrangement that comprises a rotary disk valve for switching at least one of a cooling circuit or a bypass circuit, a coolant pump that is constructed as an impeller pump and is connected on a suction side to the valve arrangement, the coolant pump has an internal guide plate that can be adjusted in an axial direction between two end stops for closing and releasing a pump output, and the guide plate is indirectly coupleable by a lead screw thread with a drive shaft of the rotary disk valve. 
     
     
         2 . The device according to  claim 1 , wherein the guide plate has contours adapted to an impeller of the coolant pump with a collar constructed on an outer circumferential side for closing and releasing the pump outlet. 
     
     
         3 . The device according to  claim 1 , wherein the guide plate has a pin-shaped projection with which the guide plate is guided in an axial direction in a hole of a support shaft of the coolant pump. 
     
     
         4 . The device according to  claim 1 , wherein the lead screw thread comprises a trapezoidal thread and a threaded sleeve that is in engagement with the trapezoidal thread and is secured against rotation and by which the guide plate can be loaded at least indirectly with a compression force and/or tensile force active in the axial direction. 
     
     
         5 . The device according to  claim 4 , wherein the axial adjustable guide plate is biased in the axial direction by a spring force of at least one compression spring against one of the end stops. 
     
     
         6 . The device according to  claim 1 , wherein the guide plate has a pot-shaped insert that is supported displaceable in the axial direction in the guide plate and is biased by the spring force of a compression spring in the axial direction. 
     
     
         7 . The device according to  claim 6 , wherein a spring stiffness of the compression spring provided for biasing of the pot-shaped insert is selected higher than a spring stiffness of the compression spring provided for the biasing of the guide plate. 
     
     
         8 . The device according to  claim 6 , wherein the compression spring provided for biasing of the pot-shaped insert and the compression spring provided for biasing of the guide plate are arranged coaxial within a hole of the support shaft of the coolant pump. 
     
     
         9 . A cooling system for an internal combustion engine comprising a device according to  claim 1 , at least one cooling circuit with at least one of a cooler or a bypass circuit for the bypassing of the cooler, wherein the cooling circuit or the bypass circuit can be switched by the rotary disk valve of the valve arrangement. 
     
     
         10 . The cooling system according to  claim 9 , wherein at least one other load is connected to the cooling system and a distribution of coolant flows tailored to demand can be generated by the rotary disk valve.