JPH05162639A - Control device for vehicle - Google Patents

Abstract

PURPOSE:To prevent the transmission of noise to the outside of a vehicle and cool a heating part appropriately and surely by providing an air exhaust duct led to the vehicle side direction from the opening part of a control box provided with an air vent hole at the storage part lower face of a heating part and the opening part at the storage part upper face in a control device provided under the floor of a vehicle. CONSTITUTION:A control box 1 is mounted to the lower part of the floor face 8 of a vehicle body. Its heating part 2 is disposed on the center side in the cross-sectional direction of a vehicle, and an electrical part 3 other than the heating part 2 is disposed near the side of the vehicle. The control box 1 is provided with a vent hole 4 at the bottom face thereof and an opening part at the upper face thereof, above the heating part 2, and an air exhaust duct 5 reaching the vehicle side direction from the opening part is provided. The air flow in the control box 1 passes the opening part from the vent hole 4 and is led to the outside of the vehicle through the air exhaust duct 5. The heat generated from the heating part 2 is thereby discharged outside surely. Also with the air exhaust duct 5 provided between the vehicle body and the heating part 2, the noise generated from the heating part 2 by magnetic vibration is prevented from being transmitted to the inside-outside of the vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a main circuit device for controlling a motor of a vehicle and an auxiliary power source device for converting an input power source collected from an overhead wire into a power source corresponding to various loads. In particular, the present invention relates to a vehicle control device in which this control device is mounted under the floor of a vehicle body of an electric vehicle or the like.

[0002]

2. Description of the Related Art Sectional views of a vehicle control device mounted under the floor of a vehicle body will be described with reference to FIGS. FIG. 7 is a cross-sectional view of a conventional vehicle control device. In FIG. 7, reference numeral 1 is a control box housing the control device, and a heat generating component 2 such as a transformer or a reactor in the control device is provided near the vehicle side of the control box 1.
An electric component 3 other than the heat-generating component 2 in the control device is arranged near the center of the control box 1 in the cross-sectional direction of the vehicle. Further, ventilation holes 4 are provided in the lower part and the upper part of the heat-generating component 2 so that air can easily flow around the heat-generating component 2. Reference numeral 8 denotes a floor surface of the vehicle body, on which a beam 10 is provided via a vehicle body underframe 9 provided so as to withstand the weight of the vehicle body and the control box 1 is mounted.
Proper and reliable cooling of the heat generating component 2 is an important issue for ensuring the life and reliability of the (for vehicle) control device. For this reason, the heat generating component 2 is arranged closer to the vehicle side of the control box 1 and the ventilation port 4 is provided so that heat can be easily released to the outside of the vehicle. However, when such a structure is adopted, the heat-generating component 2 also generates noise due to magnetic vibration, so that the noise is easily transmitted to the outside of the vehicle. Further, a part of the heat generated from the heat generating component 2 stays between the beam 10 and the underfloor of the vehicle body and raises the temperature of the upper surface of the control box 1, so that the heat from the heat generating component 2 is less likely to escape to the outside, and There has been a problem that the cooling of No. 2 becomes insufficient or the floor surface 8 of the vehicle body becomes hot, which adversely affects the habitability of the vehicle.

In order to prevent noise of the heat-generating component 2 generated by magnetic vibration, a structure in which the heat-generating component 2 is arranged near the center of the vehicle body of the control box 1 as shown in FIG. The heat from the heat-generating component 2 is less likely to escape to the outside of the vehicle than in the configuration, and the problems of cooling the heat-generating component 2 and the habitability of the vehicle increase.

Also, as shown in FIG. 9, even in the case of an integral structure in which the depth dimension of the control box 1 occupies almost the entire cross section of the vehicle body, the heat-generating component 2 is placed in the central portion of the control box 1 due to restrictions on the inspection surface. Since it is often stored, the same problem as in the case of the configuration of FIG. 8 has occurred.

[0005]

As described above, according to the conventional vehicle control device, noise generated by magnetic vibration from heat generating components such as a transformer and a reactor in the control device is easily transmitted to the outside of the vehicle, Further, there is a drawback that the heat generated from the heat generating component cannot be sufficiently released to the outside of the vehicle.

Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks, prevent noise to the outside of the vehicle, and appropriately and surely cool the heat-generating components to obtain a highly reliable vehicle control device. To do.

[0007]

A control device mounted on the underfloor of a vehicle, and a control device for accommodating and storing heat-generating components near the center in the cross-sectional direction of the vehicle, and providing a ventilation port on the lower surface of the storage portion for the heat-generating components. A control box having an opening on the upper surface of the storage portion for the heat-generating component, and an exhaust duct communicating from the opening of the control box toward the vehicle side and discharging the air in the control box to the outside of the vehicle. In addition, a muffling means that is provided inside the exhaust duct and around the heat generating component to prevent noise generated from the heat generating component may be further provided.

[0008]

With the above-described structure, by providing the exhaust duct, it is possible to improve the flowability of the air around the heat-generating component through the ventilation port and reliably release the heat generated from the heat-generating component to the outside of the vehicle.

At the same time, by disposing the heat-generating component near the center in the cross-sectional direction of the vehicle in the control box and providing the sound deadening means, it is possible to prevent noise generated from the heat-generating component from being transmitted to the outside of the vehicle.

[0010]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a vehicle control device showing an embodiment of the present invention. A beam 10 is provided below the floor surface 8 of the vehicle body through a vehicle body underframe 9, and a control box 1 is mounted on the beam 10. A control device for controlling the vehicle is housed in the control box 1, and a heat-generating component 2 such as a transformer or a reactor in the control device is arranged near the center in the cross-sectional direction of the vehicle.
The electric components 3 other than the heat-generating component 2 are arranged near the vehicle side of the vehicle. On the bottom surface of the control box 1 in which the heat generating component 2 is stored,
A ventilation port 4 is provided so that air can easily flow in from the outside. An opening is provided on the upper surface of the control box 1 above the heat-generating component 2, and an exhaust duct 5 is attached through the opening in the vehicle side direction. As shown in the front view of the vehicle control device shown in FIG. 2, the exhaust duct 5 has a width dimension that extends in the longitudinal direction of the control box 1 so that a cross-sectional area necessary for releasing heat in the control box 1 can be obtained. It is configured to secure.

The flow of air in the control box 1 passes from the ventilation port 4 through an opening provided on the upper surface of the control box 1, passes through the exhaust duct 5, and is communicated to the outside of the vehicle. For this reason, the heat generated from the heat generating component 2 is surely released to the outside of the vehicle through the exhaust duct 5, so that the heat generating component 2 is insufficiently cooled, and the heat generated between the underfloor of the vehicle body and the beam 10 is reduced. It is possible to prevent the department from staying.

Further, by disposing the heat generating component 2 near the center in the cross-sectional direction of the vehicle in the control box 1 and providing the exhaust duct 5 between the vehicle body and the heat generating component 2, the heat generating component 2 is separated from the heat generating component 2 by magnetic vibration. It is possible to prevent the generated noise from being transmitted to the outside and inside of the vehicle.

Next, referring to FIG. 3, in FIG. 1, a sound absorbing member 6 is provided around the heat generating component 2 and inside the exhaust duct 5 as a sound deadening means.
FIG. 3 is a cross-sectional view of a vehicle control device showing an example in which a vehicle is installed.

In the vehicle control device having the structure in which the sound absorbing material 6 is installed in this way, the heat generated from the heat generating component 2 can be surely released through the exhaust duct 5 as in the case of FIG.
It is possible to prevent the noise generated from the heat generating component 2 from being transmitted to the outside of the vehicle and the vehicle more than in the case of FIG.

Next, FIG. 4 is a sectional view of a vehicle control device showing an embodiment in which the muffler 7 is installed above the heat-generating component 2 in FIG. In this case, since the muffler 7 can eliminate the noise, the effect of preventing the noise transmitted to the outside and the inside of the vehicle can be further improved.

Next, FIG. 5 is a cross-sectional view of a vehicle control device showing an embodiment in the case where the depth dimension of the control box 1 is an integral structure occupying substantially the entire cross section of the vehicle body. Heat generating parts 2
Is arranged in the central portion of the control box 1 in the cross section of the vehicle body. Also, on the bottom surface of the control box 1 in which the heat generating component 2 is housed,
A ventilation port 4 is provided to facilitate the inflow of air from the outside, and an exhaust duct 5 is attached through an opening provided on the upper surface of the control box 1 above the heat-generating component 2 to the vehicle side direction of the vehicle. There is.

The heat generated from the heat generating component 2 can be surely discharged to the outside of the vehicle through the exhaust duct 5 as in the case of FIG. Further, by arranging the heat-generating component 2 as a noise source in the central portion of the control box 1, noise can be prevented as in the case of FIG.

FIG. 6 shows a structure similar to that of FIG.
FIG. 3 is a cross-sectional view of a vehicle control device showing an embodiment in which the vehicle is attached to the vehicle through the opening from both sides of the vehicle. In this case, as shown in FIG. 5, when the heat exhaust in the control box 1 is insufficient with the exhaust duct 5 attached only on one side of the vehicle, the exhaust duct 5 communicating with both sides of the control box 1 is removed. By mounting it, it is possible to secure the cross-sectional area of the exhaust duct 5 necessary for releasing heat.

[0020]

As described above, according to the present invention, in a vehicle control device mounted under the floor of a vehicle body, it is possible to make it difficult to transmit noise generated from heat-generating components such as a transformer and a reactor to the outside of the vehicle. Since the heat generated from the heat generating component can be released to the outside of the vehicle and the heat generating component can be appropriately and surely cooled, a highly reliable vehicle control device can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vehicle control device of the present invention.

FIG. 2 is a front view of the vehicle control device of the present invention.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a sectional view showing a third embodiment of the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the present invention.

FIG. 6 is a sectional view showing a fifth embodiment of the present invention.

FIG. 7 is a cross-sectional view of a conventional vehicle control device.

FIG. 8 is a cross-sectional view of a conventional vehicle control device.

FIG. 9 is a cross-sectional view of a conventional vehicle control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vehicle control device 2 ... Exothermic part 4 ... Ventilation port 5 ... Exhaust duct 6 ... Sound absorbing material 7 ... Muffler

Claims (2)

[Claims] 1. A control device mounted on the underfloor of a vehicle, and the control device is arranged to accommodate a heat-generating component near the center in the cross-sectional direction of the vehicle, and a ventilation port is provided on the lower surface of the accommodating portion of the heat-generating component. A control box having an opening on the upper surface of the housing of the heat-generating component, and an exhaust duct communicating from the opening of the control box toward the vehicle side of the vehicle and discharging the air in the control box to the outside of the vehicle A control device for a vehicle, comprising: 2. The vehicle control according to claim 1, further comprising a silencer provided inside the exhaust duct and around the heat generating component for preventing noise generated from the heat generating component. apparatus.