Cooling water circuit system
First Claim
1. A cooling water circuit system for cooling a water-cooled engine of a vehicle and for heating air blown into a passenger compartment of the vehicle, said cooling water circuit system comprising:
- means for forming a cooling water circuit in which cooling water for cooling the engine circulates;
a radiator for cooling the cooling water in said cooling water circuit;
a heater core for heating air blown into the passenger compartment by using cooling water in said cooling water circuit as a heating source;
a first water pump mechanically driven by the engine, said first water pump being disposed in said cooling water circuit in such a manner that cooling water pumped by said first water pump flows through said radiator and said heater core in parallel;
an electrically-driven second water pump disposed in said cooling water circuit at a position where cooling water to be supplied from said first water pump to said radiator and cooling water to be supplied from said first water pump to said heater core flow together, said second water pump having a suction side for sucking cooling water and a discharge side for discharging cooling water; and
a check valve disposed in said cooling water circuit in parallel with said second water pump in such a manner that cooling water flows in one way from said suction side of said second water pump toward said discharge side of said second water pump.
1 Assignment
0 Petitions
Accused Products
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.
31 Citations
13 Claims
-
1. A cooling water circuit system for cooling a water-cooled engine of a vehicle and for heating air blown into a passenger compartment of the vehicle, said cooling water circuit system comprising:
-
means for forming a cooling water circuit in which cooling water for cooling the engine circulates; a radiator for cooling the cooling water in said cooling water circuit; a heater core for heating air blown into the passenger compartment by using cooling water in said cooling water circuit as a heating source; a first water pump mechanically driven by the engine, said first water pump being disposed in said cooling water circuit in such a manner that cooling water pumped by said first water pump flows through said radiator and said heater core in parallel; an electrically-driven second water pump disposed in said cooling water circuit at a position where cooling water to be supplied from said first water pump to said radiator and cooling water to be supplied from said first water pump to said heater core flow together, said second water pump having a suction side for sucking cooling water and a discharge side for discharging cooling water; and a check valve disposed in said cooling water circuit in parallel with said second water pump in such a manner that cooling water flows in one way from said suction side of said second water pump toward said discharge side of said second water pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A cooling water circuit system for cooling a water-cooled engine of a vehicle and for heating air blown into a passenger compartment of the vehicle, said cooling water circuit system comprising:
-
means for forming a cooling water circuit in which cooling water for cooling the engine circulates; a radiator for cooling the cooling water in said cooling water circuit; a heater core for heating air blown into the passenger compartment by using cooling water in said cooling water circuit as a heating source; a first water pump mechanically driven by the engine, said first water pump being disposed in said cooling water circuit in such a manner that cooling water pumped by said first water pump flows through said radiator and said heater core in parallel; an electrically-driven second water pump disposed in said cooling water circuit at a position where cooling water from said radiator and cooling water from said heater core flows together, said second water pump having a suction side for sucking cooling water and a discharge side for discharging cooling water; and a check valve disposed in said cooling water circuit in parallel with said second water pump in such a manner that cooling water flows in one way from said suction side of said second water pump toward said discharge side of said second water pump. - View Dependent Claims (13)
-
Specification