Regulating valve

Claim 1

A liquid cooling-system of a combustion engine utilizing a regulating valve comprising: a housing having a cylindrical valve chamber, the valve chamber having at least one inlet port and at least two outlet ports: a valve body within the valve chamber and rotatable about an axis, the valve body being operable by an actuator, the valve body being rotatable to at least partially close the inlet port and the outlet ports; a sealing device interposed between the valve body and at least one of the ports, the sealing device designed to be brought into sealing engagement with the valve body under an elastic preload; wherein the valve body is shaped substantially in the form of a segment of a cylinder having a top side, a bottom side, an outer curved side, and two peripheral sides, wherein each peripheral side has an outside edge facing the housing; wherein the outside edge of one of the peripheral sides passes over the inlet port during the opening of the inlet and has an elliptically shaped recess extending in a direction parallel to the axis of rotation of the valve body; and wherein a duct-shaped opening is located in the valve body, extending from one peripheral side to the other; wherein the inlet is connected with a coolant outlet of the combustion engine, the outlets are connected with a radiator circulation circuit, a bypass circulation circuit and a circulation circuit for vehicle passenger compartment heating, wherein the outlet to the radiator circulation circuit and the outlet to the passenger compartment heating circulation circuit are adjacent to the inlet on either side, wherein the inlet and the outlets for the radiator circulation circuit and the vehicle passenger compartment heating circulation circuit are totally closable jointly and the outlet for the bypass circulation circuit is only completely closed by the valve body when the inlet and the outlets adjacent on both sides of the inlet are completely open.