Patent ID: 6247429
Filing Date: 2001-06-19
Classification: F01P

Abstract:
A cooling water circulating apparatus adapted to circulate cooling water through an engine or a radiator, comprising:a first water pump which has a first supply port for supplying thereinto cooling water which is to flow through the interior of an engine, and a first discharge port for discharging therefrom the supplied cooling water to the engine, again, and which is directly connected to and rotated with a cam shaft of the engine;a control mechanism adapted to cut off a flow of the cooling water, which is directed from a radiator to the first supply port, when the temperature of the cooling water is not higher than a predetermined level, and communicate the radiator and first supply port with each other when the temperature of the cooling water is higher than the predetermined level; anda second water pump which has a second supply port for supplying thereinto cooling water which is to flow through the interior of the engine, and a second discharge port for discharging therefrom the supplied cooling water to the supply port of the first water pump, and which is electrically rotated in accordance with the temperature of the cooling water.