A cooling system includes a first cooling system in which coolant is supplied from a radiator to a motor so as to cool the motor, and then the coolant is supplied to banks of an engine through a circulation passage and split flow passages so as to cool the engine; and a second cooling system in whic
A cooling system includes a first cooling system in which coolant is supplied from a radiator to a motor so as to cool the motor, and then the coolant is supplied to banks of an engine through a circulation passage and split flow passages so as to cool the engine; and a second cooling system in which the coolant delivered from the radiator through a branch passage is further cooled by a radiator, and the cooled coolant is supplied to a drive circuit so as to cool the drive circuit. With this configuration, it is possible to efficiently cool the motor, the engine, and the drive circuit whose suitable operating temperatures are different from each other, and to make the configuration of the cooling system simple.
대표청구항▼
The invention claimed is: 1. A cooling system used in a hybrid system which includes an internal combustion engine, a drive mechanism including a motor, and a drive circuit for driving the motor, comprising: a first cooling system which includes a first cooling device for cooling a cooling medium,
The invention claimed is: 1. A cooling system used in a hybrid system which includes an internal combustion engine, a drive mechanism including a motor, and a drive circuit for driving the motor, comprising: a first cooling system which includes a first cooling device for cooling a cooling medium, and in which the cooling medium that has been cooled by the first cooling device is delivered to the drive mechanism, and then to the internal combustion engine, and is returned to the first cooling device so that the drive mechanism and the internal combustion engine are cooled; and a second cooling system which includes a second cooling device for cooling the cooling medium, and in which part of the cooling medium delivered from the first cooling device is cooled by the second cooling device, and the cooling medium cooled by the second cooling device is returned to the first cooling system through the drive circuit so that the drive circuit is cooled. 2. The cooling system according to claim 1, wherein in the second cooling system, after the cooling medium cools the drive circuit, the cooling medium is returned to a portion downstream of the drive mechanism in the first cooling system. 3. The cooling system according to claim 1, wherein the second cooling system further includes a flow rate adjusting portion for adjusting a flow rate of the cooling medium. 4. The cooling system according to claim 1, wherein the internal combustion engine includes plural operation systems each of which includes at least one cylinder, and each of the plural operation systems can be separately operated; and in the first cooling system, a flow of the cooling medium is split such that the cooling medium is separately delivered to each of the plural operation systems of the internal combustion engine, and each of the plural operation systems is separately cooled. 5. The cooling system according to claim 4, wherein the first cooling system further includes plural pressure-delivery portions each of which delivers, under pressure, the cooling medium to a corresponding operation system among the plural operation systems. 6. The cooling system according to claim 5, wherein the first cooling system further includes a pressure-delivery control portion for controlling driving of the plural pressure-delivery portions based on an operating state of the internal combustion engine. 7. The cooling system according to claim 6, wherein the pressure-delivery control portion controls driving of the plural pressure-delivery portions such that the cooling medium is delivered under pressure only to an operation system that is being operated among the plural operation systems. 8. The cooling system according to claim 6, wherein in a case where at least one of the plural operation systems is being operated, and an operation system that has not been operated starts to be operated, the pressure-delivery control portion controls driving of the pressure-delivery portions for delivering, under pressure, the cooling medium to the operation system that will start to be operated such that the cooling medium flows back to the operation system that will start to be operated for a predetermined time period before the operation system starts to be operated. 9. The cooling system according to claim 4, wherein the first cooling device can separately cool the cooling medium that has been delivered from each of the plural operation systems of the internal combustion engine. 10. The cooling system according to claim 9, wherein the first cooling device includes an inlet portion which separately receives the cooling medium that has been delivered from each of the plural operation systems of the internal combustion engine; a cooling portion which separately cools the cooling medium that has been delivered from each of the plural operation systems; and an outlet portion from which the cooling medium that has been delivered from each of the plural operation systems and has been separately cooled is discharged. 11. The cooling system according to claim 1, wherein the first cooling device and the second cooling device cool the cooling medium using heat exchange with outside air. 12. The cooling system according to claim 1, wherein the hybrid system is a hybrid vehicle which can run using power supplied from the internal combustion engine and power supplied from the motor, and each of the first cooling device and the second cooling device includes a radiator.
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이 특허에 인용된 특허 (2)
Tsujii Hiroshi (Susono JPX) Suda Megumu (Susono JPX) Nii Yoshihide (Fuji JPX), Controller for hybrid vehicle drive system.
Nguyen, Hoang-Giang; Van-Frank, Jean; Ketfi-Cherif, Ahmed; Dang-Van-Nhan, Christophe; Yu, Robert, Cooling system and method for a hybrid powertrain of a motor vehicle.
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