Cooling water circuit system

Details Cooling water circuit system Cooling water circuit system

1999-04-08

2000-07-04

Joyce, Harold

Heating systems

Heat and power plants

Vehicle

237 2A, B60H 102

Patent

active

060826266

ABSTRACT:
In a cooling water circuit system, cooling water pumped by a mechanically-driven first water pump circulates in a cooling water circuit, and flows through a radiator and a heater core in parallel in the cooling water circuit. An electrically-driven second water pump is disposed in the cooling water circuit at a position where cooling water to be supplied to the radiator from the first water pump and cooling water to be supplied to the heater core from the first water pump flow together. A check valve is provided in the cooling water circuit in parallel with the second water pump so that cooling water flows in one way from a water suction side of the second water pump toward a discharge side thereof. Thus, when the second water pump is operated, a total amount of cooling water pumped by the first water pump and the second water pump can flow through the radiator and the heater core. As a result, the cooling water circuit system can improve engine-cooling effect in the summer, while improving heating effect of a passenger compartment in the summer.

REFERENCES:
patent: 5497941 (1996-03-01), Numazawa et al.
patent: 5678760 (1997-10-01), muso et al.
patent: 6032869 (2000-03-01), Ito et al.

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