JP3649104B2 - Parallel hybrid electric truck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a parallel hybrid electric truck, and more particularly, to a radiator mounting structure for cooling a motor for driving the vehicle, an inverter for controlling the motor, and the like.
[0002]
[Prior art]
The parallel hybrid electric vehicle includes a vehicle driving motor, a vehicle driving battery, an inverter for controlling the motor, and the like in addition to the vehicle driving engine. Since the motor and the inverter generate heat as the operating current flows, it is necessary to cool the motor and the inverter in order to ensure stable operation.
A water cooling system is usually used for this cooling, and the cooling water that has taken heat from the motor or the inverter is sent to a separately installed radiator through a pipe, where it dissipates heat. That is, a radiator (hereinafter referred to as a “radiator for a hybrid electric device”) that cools the motor for driving the vehicle and the inverter is also mounted.
[0003]
Since this radiator for hybrid electric devices is cooled by the traveling wind, the foremost part of the vehicle is most desirable as the arrangement position. In view of this, passenger cars of parallel hybrid electric vehicles are arranged at the forefront of the vehicle, side by side with the engine cooling radiator.
When manufacturing a passenger car for a parallel hybrid electric vehicle, the vehicle body is newly designed for a parallel hybrid electric vehicle, so that the layout of each device to be mounted can be freely considered to be adapted thereto. Therefore, the arrangement of the radiator for the hybrid electric device can be determined as the frontmost part of the vehicle because it is the most desirable position for receiving the traveling wind.
[0004]
In the case of manufacturing a parallel hybrid electric vehicle truck (that is, a parallel hybrid electric truck), the position of the radiator for the hybrid electric device is preferably the frontmost part of the vehicle in terms of receiving the driving wind most often. There is no change.
FIG. 2 is a view of a conventionally considered parallel hybrid electric truck as viewed from above. In FIG. 2, 1 is a parallel hybrid electric truck, 2 is a cab, 3 is a cargo box, 4 is an engine, 5 is a motor, 6 is a clutch, 7 is a transmission, 8 is a propeller shaft, 9 is a radiator for a hybrid electric device, 10 is a pipe, 11 is an inverter, 12 is a front wheel, and 13 is a rear wheel.
[0005]
In this example, the parallel hybrid electric truck 1 is composed of a cab 2 and a cargo box 3 connected to the rear thereof. The engine 4 or the motor 5 generates power for driving the vehicle. The power generated there passes through the clutch 6, the transmission 7, and the propeller shaft 8, and finally the rear wheel 13 (drive wheel). ).
Since the radiator 9 for hybrid electric devices is a radiator for cooling the motor 5 for driving the vehicle and the inverter 11 for controlling the motor 5, the radiator 9 is connected to the piping 10 through which the cooling water passes. Note that a radiator for cooling the engine 4 is separately provided at the forefront of the vehicle, but this is not shown.
[0006]
However, in the case of a parallel hybrid electric truck, the vehicle body is not newly designed for a parallel hybrid electric vehicle. The reason for this is that the number of units sold is small, so it would be expensive to design a new body. (In the case of passenger cars, the number of units sold is much higher than that of trucks. Is less.)
Therefore, it is assumed that the body of the truck of the conventional internal combustion engine is used as it is as much as possible, and if it is changed, it is kept to a minimum. The biggest change is that the motor 5 for driving the vehicle is installed between the engine 4 and the transmission 7, but most of the other things are not available in the vehicle body of the conventional specification. It will be installed in the space. The space below the cab 2 is an engine room, but there is not much room, so the inverter 11 for a parallel hybrid electric vehicle, a vehicle drive battery (not shown), etc. It will be installed below the packing box 3 behind.
[0007]
[Problems to be solved by the invention]
(problem)
However, the above-described conventional parallel hybrid electric truck has problems that the pipe 10 connecting the radiator 9 for the hybrid electric device and the motor 5 or the inverter 11 is easily damaged or increases the cost and weight. It was.
(Explanation of problem)
As shown in FIG. 2, the hybrid electric device radiator 9 is installed at the foremost part of the vehicle, while the motor 5 and the inverter 11 are installed below the cargo box 3, so the pipe 10 is not necessarily long. I do not get. When the piping 10 becomes long, the following problems appear.
[0008]
(1) Opportunities to hit rocks while driving or to touch the convex and concave portions of the road surface when traveling on rough terrain are increased, and the pipe 10 is likely to be damaged (therefore, the risk of water leakage is great) Become).
(2) The length of the pipe 10 itself increases the cost and the weight of the vehicle.
(3) In order to cope with the above-mentioned breakage, it is necessary to install a metal cover below the pipe 10, but this further increases the cost and the vehicle weight.
An object of the present invention is to solve the above problems.
(In the case of a passenger car, the car body is newly designed, and the motor and inverter are installed in or near the engine room at the front of the vehicle, so the piping between the radiator for the hybrid device at the front of the vehicle is (It does n’t matter as much as it does for trucks.)
[0009]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, a motor for driving a vehicle installed near the rear end of the cab, and a lower side of a cargo box used for controlling the motor and connected to the rear of the cab. In the parallel hybrid electric truck comprising at least a hybrid electric device radiator connected to the inverter, and the motor and the inverter with water cooling pipes for water cooling, the hybrid electric device radiator Is arranged at the lowermost front part of the packing box.
Moreover, when the radiator for exclusive use is provided with respect to the said inverter, this radiator is good also as arrange | positioning in the lowermost front part of the said cargo box.
[0010]
(Function)
The length of the pipe connecting the radiator for the hybrid electric device, the motor and the inverter is much shorter than the conventional one, and the cost and weight can be reduced. In addition, there is less chance of hitting stones bounced during traveling or contact with uneven road surfaces when traveling on rough terrain, and the possibility of damage to the piping is reduced.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of the present invention, and the reference numerals correspond to those in FIG. Since the same reference numerals are the same, their description is omitted.
In the parallel hybrid electric truck of the present invention, the radiator 9 for the hybrid electric device is disposed at the lowermost front part of the cargo box 3 connected to the cab 2. The motor 5 for driving the vehicle of the parallel hybrid electric truck is arranged between the engine 4 and the transmission 7 as described in the section of the prior art, but the installation position is around the rear end of the cab 2. . Moreover, the inverter 11 which is a kind of hybrid electric apparatus is installed below the cargo box 3 as described above.
[0012]
The position where the radiator for hybrid electric device 9 is disposed is preferably a position close to the motor 5 or the inverter 11 in order to shorten the length of the pipe for circulating the cooling water. Further, in order to increase the cooling efficiency, a position that is as susceptible to traveling wind as possible is desirable. As such a position, in the present invention, the position of the lowermost front part of the packing box 3 is selected.
[0013]
If the hybrid electric device radiator 9 is installed at this position, the length of the pipe 10 connected to the motor 5 and the inverter 11 becomes considerably shorter than that of the conventional one. Eliminated or greatly improved. Further, since the cab 2 and the packing box 3 are slightly separated from each other, an empty space is provided in the traveling direction to some extent in front of the radiator 9 for the hybrid electric apparatus attached to the lowermost front part of the packing box 3. Will exist. This space is sufficient to guide the running wind evenly to the front surface of the radiator 9 for a hybrid electric apparatus, and the cooling efficiency is not so lowered as compared with the frontmost part of the vehicle.
[0014]
In addition, although what was demonstrated in FIG. 1 is an example in the case of performing water cooling of both the motor 5 and the inverter 11 with a common radiator, it is also conceivable that water cooling is performed with separate radiators. Since the position of the motor 5 is at the front or the front of the packing box 3, the radiator will also be installed in the vicinity (or at the front of the vehicle), so there is no need to worry too much in terms of running wind. Absent.
However, since the inverter 11 is installed in the central part below the packing box 3 or behind it, if the radiator is provided in the vicinity thereof, the running wind is poor. Therefore, when the inverter 11 is cooled by a dedicated radiator, the radiator is disposed at the lowermost front part of the packing box. By doing in this way, a cooling efficiency can be improved.
[0015]
【The invention's effect】
As described above, in the parallel hybrid electric truck according to the present invention, the radiator for the hybrid electric device is disposed at the lowermost front portion of the cargo box connected to the rear of the cab. The piping connecting the motor and inverter has become shorter, manufacturing costs have been reduced, and vehicle weight has been reduced. Moreover, it became difficult to break.
Further, when a dedicated radiator is provided for the inverter, the cooling efficiency can be improved by arranging the radiator at the lowermost front part of the packing box.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention. FIG. 2 is a diagram showing a conventional parallel hybrid electric truck.
DESCRIPTION OF SYMBOLS 1 ... Parallel hybrid electric truck, 2 ... Cab, 3 ... Cargo box, 4 ... Engine, 5 ... Motor, 6 ... Clutch, 7 ... Transmission, 8 ... Propeller shaft, 9 ... Radiator for hybrid electric devices, 10 ... Piping, 11 ... Inverter, 12 ... Front wheel, 13 ... Rear wheel

Claims (2)

A vehicle driving motor installed near the rear end of the cab;
An inverter that is used to control the motor and is installed below the packing box connected to the rear of the cab;
In a parallel hybrid electric truck comprising at least a radiator for a hybrid electric device connected to the motor and the inverter by water for piping for cooling water flow,
A parallel hybrid electric truck, wherein the radiator for the hybrid electric device is disposed at a lowermost front part of the packing box. An inverter used to control the motor for driving the vehicle and installed below the cargo box connected to the rear of the cab;
In a parallel hybrid electric truck having at least a dedicated radiator for water-cooling the inverter,
A parallel hybrid electric truck characterized in that the radiator is disposed at a lowermost front part of the packing box.

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