A water pump of an electromagnetic clutch type, which feeds a coolant with pressure to a water jacket in an engine may include a belt pulley mounted at one end of a bearing shaft for being rotated on the bearing shaft by power transmitted through a belt, an impeller that is fixed to the other end of the bearing shaft, an electromagnetic actuator selectively supplying magnetic force, a clutch operating member movable along the bearing shaft to selectively engage the belt pulley with the bearing shaft by using the magnetic force of the electromagnetic actuator, and an elastic member exerting a force on the clutch operating member to support elastically the clutch operating member toward the belt pulley.
How an Electric Water Pump Works
Electric water pumps function very much like your standard mechanical water pump. Operating as a centrifugal pump, a driven impeller rotates inside the housing to force water through the engine and back to the radiator where it is cooled, and the cycle begins again. Obviously, the difference with an electric pump is that rather than being driven from a belt off the crankshaft, it is driven by an electric motor.