Patent ID: 6257177
Filing Date: 2001-07-10
Classification: F01P,F04D

Abstract:
A water pump for a cooling circuit of an internal combustion engine, the water pump comprising:a pump housing including a first peripheral wall having at least one flow opening for a cooler line connected to a cooler and for at least one partial circuit, the flow opening including at least one of an inlet opening and a discharge opening;a driven pump device disposed in the pump housing; anda servo valve in the pump housing, the servo valve including an at least partially sleeve-shaped rotary gate, the rotary gate including an axial main opening for at least one of inlet of a cooling medium from a pressure side of the pump device or and discharge of a cooling medium to a suction side of the pump device, and including a second peripheral wall having a control opening capable of at least one of connecting the main opening to two adjacent ones of the flow openings for a mixed operation and connecting the main opening to an individual one of the flow openings.