JP2004224089A - Cooling device for hybrid vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device having suitable cooling efficiency with respect to different two cooling systems, and able to be housed in a limited space. <P>SOLUTION: A hybrid vehicle is equipped with an engine 100 and a driving motor 102 as a prime mover, and is constituted to travel by driving force of one of or both of them in accordance with predetermined driving conditions. A radiator for cooling the engine whereby cooling water is circulated between itself and the engine 100 is provided as a cooling device for the engine 100, and a radiator for cooling a strong electricity system whereby the cooling water is circulated between itself and strong electricity parts is provided as a cooling device of the strong electricity system including the driving motor 102, a power supply 112 for driving the driving motor, and a power generating motor 104. The radiator for cooling the engine and the radiator for cooling the strong electricity system are arranged so that respective cores are arranged in parallel and are directed to an advancing direction of the vehicle. The front surface projection area of a cooling water passage of the radiator arranged in a front part is smaller than the front surface projection area of a cooling water passage of the radiator arranged in the rear part. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure of a cooling device for a hybrid vehicle.
[0002]
[Prior art]
In a hybrid vehicle that uses both an engine and an electric motor as a prime mover and runs with one or both driving forces, heat generated by a power supply device (hereinafter referred to as a strong electric system) such as an electric motor and a battery that supplies power to the electric motor is used. To cope with this, a cooling device for the high-power system is provided in addition to the cooling device for the engine.
[0003]
Patent Literature 1 describes a technique in which the engine cooling device and the high-power system cooling device are arranged side by side so that air is applied independently of each other.
[0004]
[Patent Document 1]
JP-A-11-285106
[Problems to be solved by the present invention]
However, in order to arrange the radiator in a limited space in the front part of the vehicle as described in Patent Document 1, it is necessary to reduce the surface area of each radiator, and there is a problem that a sufficient cooling effect cannot be obtained. there were.
[0006]
Therefore, an object of the present invention is to provide a cooling device having sufficient cooling performance for two different cooling systems even in a limited space.
[0007]
[Means for Solving the Problems]
The cooling device of the present invention is a hybrid vehicle that includes an engine and an electric motor as prime movers and is configured to run with one or both driving forces according to predetermined operating conditions. An engine cooling radiator in which cooling water circulates between the engine and an electric motor, a power supply for driving an electric motor, and a cooling water between the high-power system components as a high-power system cooling device including at least one of a power generation motor. And a radiator for circulating strong electric power. The radiator for cooling the engine and the radiator for cooling the high-power system are arranged at the front of the vehicle with their respective cores arranged substantially in parallel and in the front-rear direction of the traveling direction of the vehicle, and a cooling water passage of the radiator disposed in front is provided. Is smaller than the front projected area of the cooling water passage of the radiator arranged rearward.
[0008]
【The invention's effect】
According to the present invention, the radiator for cooling the engine and the radiator for cooling the high-current system are disposed with their respective cores substantially parallel and directed in the traveling direction of the vehicle, and the front projected area of the cooling water passage of the radiator disposed in front is Since it was smaller than the front projected area of the cooling water passage of the radiator disposed at the rear, the traveling wind directly hits both the front and rear radiators, without sacrificing the cooling performance of the rear radiator, and It becomes possible to fit in a limited space.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
FIG. 1 is a configuration example of a hybrid vehicle to which the present invention is applied.
[0011]
It has an engine 100 and a drive motor 102 as prime movers, and the controller 113 supplies one or both of the driving forces selected on the basis of the driving condition of the vehicle, the power condition, and the like to the wheels via the transmission 103, the drive shaft 114, and the like. It is transmitted to 111 and driven.
[0012]
A power generation motor 104 starts the engine 100 when the engine is started, and is driven by the engine 100 to supply the generated power to the drive motor 102 or the battery 112 via the inverter 101.
[0013]
FIG. 2 shows a configuration of the cooling system of the present embodiment.
[0014]
The cooling system includes an engine cooling system for cooling the engine 100 and a drive motor 102, a power generation motor 104 used at the time of starting the engine and the like, and a strong electric system cooling system for cooling the drive motor 102 and the inverter 101 for driving the power generation motor 104. Each cooling system has independent water pumps (engine cooling system water pump 109, high-power system cooling system 108) and cooling water paths (engine cooling water path CENG, high-power system cooling water path CELE). However, the radiator is a radiator 105 integrated with two systems.
[0015]
FIG. 3 is a schematic view of the two-system integrated radiator 105, in which reference numeral 12 denotes an engine cooling water cooling unit (also referred to as an engine cooling unit), and reference numeral 13 denotes a high-power cooling water cooling unit (also referred to as a high-power cooling unit).
[0016]
The engine cooling section 12 includes an engine cooling water upper tank 1, an engine cooling water radiating section 3, and an engine cooling water lower tank 5.
[0017]
The engine cooling water upper tank 1 and the engine cooling water lower tank 5 communicate with each other by an engine cooling water radiation tube 20 (see FIGS. 4 to 7).
[0018]
At the end of the engine cooling water upper tank 1, there is provided an engine cooling water inlet 7 communicating with an engine cooling water path CENG (not shown). The engine cooling water radiating section 3 includes an engine cooling water radiating tube 20 and an engine cooling water radiating plate 21 which will be described later.
[0019]
At the end of the engine cooling water lower tank 5, an engine cooling water outlet 9 communicating with the engine cooling water path CENG is provided.
[0020]
With the above configuration, the engine coolant that has become high in temperature through the engine is supplied from the engine coolant passage CENG to the engine coolant upper tank 1 through the engine coolant inlet 7, and the engine coolant radiates. It is cooled by flowing through the tube 20 while releasing heat, reaches the engine cooling water lower tank 5, and then flows through the engine cooling water outlet 9 to the engine cooling water path CENG.
[0021]
Similarly, the high-current cooling unit 13 includes the high-current cooling water upper tank 2, the engine cooling water radiator 4, and the high-current cooling water lower tank 6.
[0022]
The high-power cooling water upper tank 2 and the high-power cooling water lower tank 6 communicate with each other via a high-power cooling water radiating tube 22 (see FIGS. 4 to 7).
[0023]
At the end of the high-power cooling water upper tank 2, a high-power cooling water inlet 8 communicating with the high-power cooling water path CELE is provided. The heat radiating section 4 for high-power cooling water is composed of a high-power cooling water radiating tube 22 and a high-power cooling water radiating plate 23 to be described later.
[0024]
At the end of the lower tank 6 for high-power cooling water, there is provided a high-power cooling water outlet 10 communicating with the high-power cooling water path CELE.
[0025]
With the above configuration, the high-power cooling water that has become high temperature via the drive motor 102 and the power generation motor 104 passes through the high-power cooling water passage CELE, passes through the high-power cooling water inlet 8, and the upper tank for the high-power cooling water. 2 and is cooled by flowing through the radiating tube 21 for high-power cooling water while releasing heat, reaches the lower tank 6 for high-power cooling water, and from there through the high-power cooling water outlet 10. It flows to the high-current cooling water path CELE. The high-power cooling water lower tank 6 is provided at a position vertically lower than the engine cooling water lower tank 5.
[0026]
The upper tank 1 for engine cooling water and the upper tank 2 for high-power cooling water form an upper tank 11 having a double structure.
[0027]
FIG. 4 shows an AA cross section of FIG.
[0028]
A triangular opening 22a that communicates with a high-power cooling water radiating tube 22, which will be described later, has one of its tops opened in the high-power cooling water upper tank 2 in the vehicle traveling direction. In addition, the said opening part 22a is provided with two or more, and is located substantially perpendicularly to the traveling direction of a vehicle.
[0029]
In the engine cooling water upper tank 1, a trapezoidal opening 20a that communicates with an engine cooling water tube 20, which will be described later, has a shorter side of the parallel sides opened toward the traveling direction of the vehicle. The plurality of openings 20a are provided, and are arranged substantially at right angles to the traveling direction of the vehicle. The same number of openings 22a and 20a are provided, and the openings 22a and 20a are arranged so that one of the tops forms a substantially triangular shape in the traveling direction of the vehicle.
[0030]
FIG. 5 shows a BB cross section of FIG.
[0031]
The high-power cooling water cooling unit 13 communicates a plurality of high-power cooling water radiating plates 23 with the high-power cooling water upper tank 2 and the high-power cooling water lower tank 6 having the same cross-sectional shape as the opening 22a. And a plurality of heat dissipation tubes 22 for high-power cooling water. The high-power cooling water radiating plate 23 is disposed in a layered manner at a predetermined interval with the side surface 23 a substantially parallel to the traveling direction of the vehicle and substantially perpendicular to the longitudinal direction of the high-power cooling water radiating tube 22. The water radiating tube 22 penetrates the layered high-power cooling water radiating plate 23.
[0032]
Similarly, the engine cooling water cooling section 1 is also composed of an engine cooling water radiating plate 21 arranged in a layer and a engine cooling water radiating tube 20 penetrating therethrough.
[0033]
Accordingly, the heat radiation tubes 20 and 21 can release the heat of the cooling water flowing inside from the outer surfaces of the heat radiation tubes 20 and 21 and the surfaces of the heat radiation plates 21 and 23 in contact with the heat radiation tubes 20 and 21. Will be higher.
[0034]
FIG. 6 shows a cross section taken along line CC of FIG. The engine cooling water cooling section 12 is a lower rank 5 for engine cooling water, is provided with an opening 20b communicating with the engine cooling water radiating tube 20, and is provided with an engine cooling water outlet 9 at an end.
[0035]
The high-current cooling water cooling unit 13 is the same as that in FIG.
[0036]
FIG. 7 shows a DD section of FIG. There is no engine cooling water cooling unit 12 and only the lower tank 6 for cooling the high-power cooling water. The lower tank 6 for the high-power cooling water is provided with an opening 22 b communicating with the high-power cooling water radiating tube 22, and the high-power cooling water outlet 10 is provided at an end.
[0037]
With the above configuration, the heat of the high-current system cooling water and the engine cooling water is released from the wall surface of each radiator tube and the radiator plate fixed to the wall surface.
[0038]
The high-power cooling water is supplied from the high-power cooling water passage CELE to the upper tank 11 through the high-power cooling water inlet 8, flows into the high-power cooling water radiating tube 22 from the opening 22 a, and radiates heat there. Then, it flows into the lower tank 6 for the high-power cooling water, and is returned from the high-power cooling water outlet 10 provided in the lower tank 6 to the high-power cooling water passage CELE.
[0039]
Similarly, the engine cooling water passes through the engine cooling water passage CENG, passes through the engine cooling water cooling upper tank 1, the engine cooling water radiating tube 20, and the engine cooling water lower tank 5, and from the engine cooling water outlet 9 to the engine cooling water. It is returned to the cooling water passage CENG.
[0040]
In the present embodiment, as described above, the engine cooling water radiating tube 20 and the high-power system cooling water radiating tube 22 form a substantially triangular shape with the top directed toward the front of the vehicle, and are taken in from the front of the vehicle and hit the radiator 105. The traveling wind directly hits the heat dissipation tube 22 for engine cooling water as well as the heat dissipation tube 22 for engine cooling water on the vehicle traveling direction side and the radiator 105 through the gap between the heat dissipation tubes 20, 22 and the heat dissipation plates 21, 23. Get out behind. Therefore, the engine cooling section 12 located on the rear side with respect to the traveling direction of the vehicle can also achieve sufficient cooling performance.
[0041]
Here, the reason why the cooling section 13 for the strong electric system is disposed in the front and the cooling section 12 for the engine is disposed in the rear will be described.
[0042]
Comparing the engine cooling water and the high-power cooling water, the required temperature is lower for the high-power cooling water, so that the cold traveling wind that is not affected by the heat released from each of the heat radiation tubes 20 and 22 hits. It is desirable to use the heat radiating tube for high-power cooling water. Further, since the flow rate of the high-power cooling water is smaller than that of the high-power cooling water, the cross-sectional area of the heat-radiating tube for the high-power cooling water may be smaller than that of the engine cooling water.
[0043]
Therefore, it is optimal if the cross-sectional area of the heat radiating tube is small and the front heat radiating tube hit by the traveling wind in a cold state is the high-power cooling water radiating tube 22, and the rear heat radiating tube with high flow rate is the engine cooling water radiating tube 20. Arrangement.
[0044]
The reason why the heat radiation tube 22 for the high-power cooling water is made longer than that of the heat radiation tube 20 for the engine cooling water is that the temperature required for the high-power cooling water is lower than that of the engine cooling water as described above. This is because the heat is dissipated for a longer time than the engine cooling water.
[0045]
As described above, in the present embodiment, the two radiators of the engine cooling system and the high-power system cooling system are integrated, and the traveling wind directly hits the radiating tubes of the two systems, so that the vehicle can be cooled without sacrificing the cooling effect. It has become possible to effectively use the limited space at the front.
[0046]
Since the two heat radiating tubes 20 and 22 form a substantially triangular shape with the top portion directed in the traveling direction of the vehicle, the radiating tubes run not only to the heat radiating tube 22 for the front high-power system cooling water but also to the heat radiating tube 20 for the engine cooling water behind. The wind hits directly and can enhance the cooling effect.
[0047]
The front heat radiating tube has a smaller cross-sectional area than the rear heat radiating tube, so the flow rate is small, but it can be cooled down to a lower temperature because the cold wind blows and the heat radiating tube is longer than the rear heat radiating tube. It is. The front radiating tube has a lower flow rate than the engine cooling water, but the high-power cooling water that needs to be cooled to a lower temperature, and the rear radiating tube has a higher flow rate than the high-power cooling water. However, since the engine cooling water flows at a high temperature, the combination of the heat radiating tube and the cooling water flowing therein is optimized, and high cooling efficiency can be obtained.
[0048]
The second embodiment will be described with reference to FIGS.
[0049]
8 and 9 show cross sections of portions corresponding to FIGS. 5 and 6 of the first embodiment, respectively. 4 and 7 are the same as in the first embodiment.
[0050]
In the present embodiment, a space is provided between the engine cooling water radiator plate 21 and the high-current cooling water radiator plate 23.
[0051]
The temperature of the high-power cooling water when supplied to the upper tank 1 is lower than that of the engine cooling water, and the temperature in the lower tank 6 for the high-power cooling water is lower than the temperature of the engine cooling water in the lower tank 5 for the engine cooling water. Is also required to be low.
[0052]
Therefore, as described above, by providing a space between the high-power system cooling water radiator plate 21 and the engine cooling water radiator plate 23, heat radiation from the lower-temperature high-power system cooling water radiator plate 21 to the lower-temperature high-power system cooling water radiator plate 21 is provided. Since it is possible to prevent heat from flowing into the plate 23, it is possible to prevent a decrease in the cooling efficiency of the high-current cooling water.
[0053]
As described above, in the present embodiment, since the space is provided between the radiator plate 23 for the high-power system cooling water and the radiator plate 21 for the engine cooling water, the radiator plate 21 for the high-temperature engine cooling water and the low-temperature high-power system cooling water are provided. The heat exchange with the heat radiating plate 23 can be prevented, and the cooling efficiency of the cooling section 13 for the strong electric system can be prevented from lowering.
[0054]
It is needless to say that the present invention is not limited to the above embodiment, and various changes can be made within the scope of the technical idea described in the claims.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of a hybrid vehicle to which the present invention is applied.
FIG. 2 is a diagram illustrating a two-system, one-body cooling water system of the hybrid vehicle according to the first embodiment.
FIG. 3 is a schematic view of a two-system integrated radiator according to the first embodiment.
FIG. 4 is a sectional view taken along line AA of FIG. 2;
FIG. 5 is a sectional view taken along line BB of FIG. 2;
FIG. 6 is a sectional view taken along line CC of FIG. 2;
FIG. 7 is a sectional view taken along line DD of FIG. 2;
FIG. 8 is a diagram illustrating a part corresponding to FIG. 4 of the two-system integrated radiator of the second embodiment.
FIG. 9 is a diagram illustrating a portion corresponding to FIG. 5 of the two-system integrated radiator of the second embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Upper tank for engine cooling water 2 Upper tank for high-power cooling water 3 Radiator for engine cooling water 4 Radiator for high-power cooling water 5 Lower tank for engine cooling water 6 Lower tank for high-power cooling water 7 Engine cooling water inlet 8 High-power system cooling water inlet 9 Engine cooling water outlet 10 High-power system cooling water outlet 11 Upper tank 12 Engine cooling unit 13 High-power system cooling unit 20 Engine cooling water radiating tube 21 Engine cooling water radiating plate 22 High-power system Cooling water radiating tube 23 Heat radiating plate for high-power cooling water 100 Engine 101 Inverter 102 Drive motor 103 Transmission 104 Power generating motor 105 Two-system integrated radiator 106 Sub reservoir tank 107 Reservoir tank 108 Power pump for high-power cooling water 109 Engine cooling Water pump for water

Claims (6)

In a hybrid vehicle including an engine and an electric motor as prime movers, and configured to run with one or both driving forces according to predetermined operating conditions,
As an engine cooling device, an engine cooling radiator in which cooling water circulates between the engine and the engine is provided,
An electric motor, a power supply for driving the electric motor, as a high-current cooling device including at least one of a power generation motor, a high-current cooling radiator in which cooling water circulates between the high-power components is provided.
The engine cooling radiator and the high-power system cooling radiator are arranged substantially in parallel with each other and in the front-rear direction of the traveling direction of the vehicle, and are disposed at the front of the vehicle.
A cooling device for a hybrid vehicle, wherein a front projected area of a cooling water passage of a radiator arranged forward is smaller than a projected area of a front surface of a cooling water passage of a radiator arranged rearward. The cooling device for a hybrid vehicle according to claim 1, wherein a cooling water passage of the radiator disposed at the front and a cooling water passage of the radiator disposed at the rear are independent from each other. The cooling device for a hybrid vehicle according to claim 2, wherein a space is provided between the cooling water passage of the radiator disposed at the front and the cooling water passage of the radiator disposed at the rear. The cooling device for a hybrid vehicle according to any one of claims 1 to 3, wherein a lower end of the radiator arranged forward is positioned lower than a lower end of the radiator arranged rearward. The cooling device for a hybrid vehicle according to any one of claims 1 to 4, wherein a radiator arranged forward is the radiator for cooling the high-current system, and a radiator arranged rearward is the radiator for cooling the engine. A cross section of a cooling water passage of a radiator disposed forward and a cross section of a cooling water passage of a radiator disposed rearward form a substantially triangle, and one of the apexes of the substantially triangle faces a vehicle traveling direction. The cooling device for a hybrid vehicle according to any one of claims 1 to 5.

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