JP3057161U - Hybrid vehicle cooling system - Google Patents

Abstract

(57) [Summary] [Problem] A radiator for cooling an engine of a hybrid vehicle and a radiator for cooling a power semiconductor used for a motor / generator are integrated, and cooling is performed in consideration of a balance between the two when using either one. Provision of equipment. A pair of tanks (4) located on both sides of a core (3).
A pair of first inlet / outlet pipes 5 for cooling the engine cooling water
And a pair of second inlet / outlet pipes 6 of the cooling water for cooling the power semiconductor used for the motor / generator are arranged apart from each other. A plurality of partitions 7 and 8 for dividing the inside of the tank 4 into two parts are provided between the first entrance pipe 5 and the second entrance pipe 6 of the tank 4 so as to be openable and closable. The length of the inside of the tank 4 divided in the longitudinal direction is made variable.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a cooling device for a hybrid vehicle that travels by appropriately selecting driving of a vehicle by an engine and driving of a vehicle by a motor.

[0002]

[Prior art]

 When driving the engine in a hybrid vehicle, the engine was cooled by the radiator for cooling the engine cooling water. In addition, the hybrid vehicle is provided with a motor / generator, which converts the DC current of the battery into an AC current via an inverter and a power transistor (DC) for converting the AC current of the generator into a DC current on the battery side. Power semiconductor). The three-phase bridge circuit composed of this power transistor converts DC current and three-phase AC current. This power transistor was cooled by a dedicated radiator through a cooling water path separate from the engine.

[0003]

[Problems to be solved by the invention]

 It is uneconomical to provide a separate radiator for cooling the engine coolant and a radiator for cooling the power transistors (power semiconductors) of the motor generator. In view of the above, an object of the present invention is to provide a cooling device for a hybrid vehicle that integrates both radiators and that takes into account the balance of the cooling capacity required by each cooling unit when the engine is driven and when the motor is driven. And

[0004]

[Means for Solving the Problems]

 The present invention relates to a cooling system for a hybrid vehicle having both an engine drive and a motor / generator motor drive, wherein a core 3 having a large number of fins 2 and tubes 1 arranged in parallel has both ends of each tube 1. A pair of first inlet / outlet pipes 5 for cooling water for engine cooling, and a second pair of inlet / outlet pipes for cooling water for power semiconductor cooling used in the motor / generator. A plurality of partitions 7, 8 that divide the inside of the tank 4 between the first entrance pipe 5 and the second entrance pipe 6 of each tank 4 are openably and closably disposed. By changing the partition provided and closed, the length of the inside of the tank 4 divided in the longitudinal direction is made variable.

According to the cooling device for a hybrid vehicle, the cooling of the engine and the cooling of the power semiconductor used in the motor generator are performed by the same device, and the overall device can be made compact. At the same time, when the engine of the vehicle is driven, the tank portion on the engine cooling water flow side can be lengthened, and the tank portion on the power semiconductor cooling water side can be made smaller by the partitions 7 and 8. As a result, the cooling capacity on the engine side is increased, the cooling capacity on the power semiconductor side is reduced, and the vehicle can run smoothly. In addition, when the vehicle is driven by the motor, the length of the tank portion into which the cooling water for cooling the power semiconductor flows is increased to increase the cooling capacity, so that the driving of the motor can be smoothly performed. At this time, since the motor is driven, the cooling capacity of the engine cooling water is not required. The cooling system changes the balance between the required cooling capacity during each operation of the engine drive and the motor drive to the optimum state, and the cooling capacity of both can be maximized with a small cooling device. .

[0006]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of the hybrid vehicle of the present invention, showing a state in which the vehicle is driven by an engine 9. This cooling device for a hybrid vehicle is obtained by integrating a cooling device for engine cooling water and a cooling device for a power semiconductor used in a motor / generator. At the same time, focusing on the fact that the cooling power of the power semiconductor is small when the engine is driven, and that the cooling capacity of the engine is small when the motor is driven, the cooling system is designed according to the amount of heat exchange required for each drive. The use part of is changed.

For this purpose, in this embodiment, both ends of each tube 1 of a core 3 in which a number of tubes 1 and fins 2 are arranged in parallel are communicated with a pair of tanks 4, and each tank 4 is provided with engine cooling water. A pair of first inlet / outlet pipes 5 are disposed on one side in the longitudinal direction, and a pair of second inlet / outlet pipes 6 are disposed on the other side of the tank 4 for cooling water for power semiconductor cooling used for the motor / generator. Have been. A pair of partitions 7, 8 for bisecting the inside of the tank 4 are provided between the first entrance pipe 5 and the second entrance pipe 6 of each tank 4 so as to be openable and closable.

The partitions 7 and 8 can selectively maintain an open state and a closed state by an actuator, a solenoid, or the like. When one partition 7 is open, the other partition 8 is closed, and conversely, when the other partition 8 is open, one partition 7 is closed. The pair of first inlet / outlet pipes 5 is connected to a cooling water pipe of the engine 9, and the pair of second inlet / outlet pipes 6 is connected to a cooling water pipe of the power semiconductor 11. When the engine 9 is used, the partition 8 close to the first entrance pipe 5 is open, and the partition 7 close to the second entrance pipe 6 is closed. As a result, cooling water for the engine 9 flows to the left side of the partition 7, which is most of the core 3, and cooling water for the power semiconductor 11 flows to the right side of the partition 7. As a result, the cooling capacity of the driven engine 9 increases.

Next, FIG. 2 is a schematic front view of the hybrid vehicle of the present invention, showing a state in which the vehicle is driven by a motor from a battery via a power semiconductor 11. When the vehicle is driven by this motor drive, the partition 7 on the power semiconductor 11 side is opened and the partition 8 on the engine 9 side is closed as shown in FIG. As a result, the core portion on the right side of the partition 8 is used for cooling the power semiconductor 11, and the cooling capacity is increased. At this time, since the engine 9 is not used, its cooling capacity is not required much.

[0010]

[Functions and effects of the invention]

 The cooling device for a hybrid vehicle according to the present invention includes a pair of first inlet / outlet pipes 5 for cooling water for engine cooling in a pair of tanks 4 and a pair of second cooling water for cooling electric power used for the motor / generator. The entrance / exit pipes 6 are spaced apart from each other, and a plurality of partitions 7 and 8 that divide the inside of the tank 4 into two parts are provided between the first entrance / exit pipe 5 and the second entrance / exit pipe 6 of each tank 4 so as to be openable and closable. By changing the partition to be closed, the length of the inside of the tank 4 divided in the longitudinal direction is made variable. Therefore, cooling of the engine and cooling of the power semiconductor used in the motor generator can be performed by the same device, and the overall device can be made compact. At the same time, when the engine of the vehicle is driven, the tank portion on the engine cooling water flow side can be made longer, and the tank portion on the power semiconductor cooling water side can be made smaller by the partitions 7 and 8. As a result, the cooling capacity on the engine side is increased, and the cooling capacity on the power semiconductor side is reduced, so that the vehicle can run smoothly.

[0011] Furthermore, when the motor of the vehicle is driven, the tank portion into which the cooling water for cooling the power semiconductor flows in is lengthened, and the cooling capacity is increased, so that the driving of the motor can be smoothly performed. At this time, since the engine is not driven, the cooling capacity of the engine cooling water is not required much. The cooling system changes the balance between the required cooling capacity during each operation of the engine drive and the motor drive to the optimum state, and the cooling capacity of both can be maximized with a small cooling device. .

[Brief description of the drawings]

FIG. 1 is a schematic front view of the hybrid vehicle of the present invention,
3 shows a state when the vehicle is driven by the engine 9.

FIG. 2 is a schematic front view of the hybrid vehicle of the present invention,
2 shows a state in which a vehicle is driven by a motor from a battery via a power semiconductor 11.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube 2 Fin 3 Core 4 Tank 5 First entrance / exit pipe 6 Second entrance / exit pipe 7, 8 Partition 9 Engine 11 Power semiconductor

Claims (1)

[Utility model registration claims] 1. A cooling system for a hybrid vehicle having both an engine drive and a motor / generator motor drive, comprising:
Both ends of each tube 1 are communicated with a pair of tanks 4, each tank 4 has a pair of first inlet / outlet pipes 5 for cooling water for engine cooling, and cooling water for cooling power semiconductors used for the motor generator. A pair of second entrance / exit pipes 6 are arranged apart from each other, and between the first entrance / exit pipe 5 and the second entrance / exit pipe 6 of each tank 4, a plurality of partitions 7, which divide the inside of the tank 4 into two, A cooling device for a hybrid vehicle, characterized in that the length of the inside of the tank 4 is divided into two in the longitudinal direction by changing the partition that is provided to be openable and closable.