Vehicular use cooling apparatus

A vehicular use cooling apparatus including a radiator having upper and lower tanks comprising:

• a first cooling water circuit comprising:
• a first inlet passage for guiding the cooling water flowing out from a water-cooled internal combustion engine,
• a first radiator portion being a part of said radiator and having at the upper tank a first inlet which is connected to said first inlet passage and receives cooling water from said engine and at the lower tank a first outlet which discharges the cooled cooling water exchanging heat with air,
• a first outlet passage for returning the cooled cooling water from said first outlet of said first radiator portion to said water-cooled internal combustion engine, and
• a first water circulating means for circulating the cooling water of said water-cooled internal combustion engine to said first radiator portion,
• a second cooling water circuit comprising:
• a second inlet passage for guiding the cooling water flowing out from another water-cooled cooling apparatus different from said water-cooled internal combustion engine,
• a second radiator portion being a part of said radiator and having at the upper tank a second inlet which is connected to said second inlet passage and receives cooling water from said another water-cooled cooling apparatus and at the lower tank a second outlet which discharges the cooled cooling water exchanging heat with air,
• a second outlet passage for returning the cooled cooling water from said second outlet of said second radiator portion to said other water-cooled cooling apparatus, and
• a second water circulating means for circulating the cooling water of said other water-cooled cooling apparatus to said second radiator portion,
• a third cooling water circuit comprising:
• a third inlet passage or said selectively connecting connecting with said first inlet passage or said second inlet passage and guiding the one of the cooling waters of the same,
• a third radiator portion being a part of said radiator and connecting with said third inlet passage and cooling the cooling water selectively introduced from one of said first inlet passage and said second inlet passage, and
• a third outlet passage for selectively connecting with one of said first outlet passage and said second outlet passage and guiding the cooling water discharged from said third radiator portion to one of the same;
• a first switching means for selectively connecting said third inlet passage to one of said first inlet passage and said second inlet passage so that said third radiator portion becomes parallel with one of said first radiator portion and said second radiator portion,
• a second switching means for selectively connecting said third outlet passage to one of said first outlet passage and said second outlet passage, and
• a control means for operating said switching means in accordance with the state of operation of said water-cooled internal combustion engine.

A vehicular use cooling apparatus comprising:

• a radiator having upper and lower tanks,
• a first cooling water circuit comprising:
• a first inlet passage for guiding the cooling water flowing out from a water-cooled internal combustion engine,
• a first radiator portion being a part of said radiator and having the upper tank a first inlet which is connected to said first inlet passage and receives cooling water from said engine and at the lower tank a first outlet which discharges the cooled cooling water exchanging heat with air,
• a first outlet passage for returning the cooled cooling water from said first outlet of said first radiator portion to said water-cooled internal combustion engine, and
• a first water circulating means for circulating the cooling water of said water-cooled internal combustion engine to said first radiator portion,
• a second cooling water circuit comprising:
• a second inlet passage for guiding the cooling water flowing out from another water-cooled cooling apparatus different from said water-cooled internal combustion engine,
• a second radiator portion being a part of said radiator and having at the upper tank a second inlet which is connected to said second inlet passage and receives cooling water from said another water-cooled cooling apparatus and at the lower tank a second outlet which discharges the cooled cooling water exchanging heat with air, said portion formed as an integral radiator with said first radiator portion,
• a second outlet passage for returning the cooled cooling water from said second outlet of said second radiator portion to said other water-cooled cooling apparatus, and
• a second water circulating means for circulating the cooling water of said other water-cooled cooling apparatus to said second radiator portion,
• a bypass passage for returning the cooling water flowing out from said water-cooled internal combustion engine from said first inlet passage to said first outlet passage passing said radiator,
• a switching valve for selecting whether to pass the cooling water flowing from said water-cooled internal combustion engine through one of said inlet passage and said bypass passage,
• a connection means provided between said first radiator portion and said second radiator portion at one of said upper and lower tanks and for being able to block the exchange of cooling water in said first radiator portion and the cooling water at said second radiator portion,
• a detection means for detecting the temperature of the cooling water flowing out from said water-cooled internal combustion engine and outputting a detection signal in accordance with said temperature, and
• a control means for operating said connection means in accordance with the state of operation of said water-cooled internal combustion engine and/or said other water-cooled cooling apparatus by receiving said detection signal from said detection means, comparing said detected temperature with a first reference temperature, and, when said detected temperature is higher than said firs reference temperature, placing said connection means in the connection state or comparing said temperature with a second reference temperature, and, when said detected temperature is lower than said second reference temperature, switching said switching valve to pass the cooling water flowing out from said engine through said bypass passage, and placing said connection means in the connection state.