JPH0442763Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field The present invention relates to a vehicle cooling device applied to a chassis dynamometer.
The present invention relates to a vehicle cooling device in which the rollers are made to protrude from the pit cover and a wind guide plate is provided between the front wheel roller and the rear wheel roller to efficiently cool the tires of the automobile.

B. Summary of the invention This invention allows the rollers of the chassis dynamometer to protrude from the pit cover, and also provides a wind guide plate on the pit cover between the front wheel roller and the rear wheel roller, thereby preventing air from the cooling fan. In addition to efficiently applying the air to the tires, the fan action by the rollers (air flow occurs around the rollers as the rollers rotate) is also used in a friendly manner.
Furthermore, the air warmed by the front tires escapes to the outside through the wind guide plate and is not sent to the rear tires, and moreover, the air from the cooling fan is guided by the wind guide plate and flows through the rear tires. The present invention relates to a vehicle cooling system which is capable of extremely effective tire cooling overall.

C. Prior Art Conventionally, tires are mounted on the rollers of a chassis dynamometer, and a cooling fan is installed facing the vehicle and operated to cool the tires and a portion of the lower portion of the vehicle body. This is to keep the frictional heat between the tires and the rollers low and approximate the actual driving conditions.

D Problems that the invention aims to solve However, in recent years, as the performance of cars has increased, high-speed tests such as high-speed stability and durability have become more frequent, and as a result, the capacity of the cooling fan drive motor has increased. In addition, the space taken up by the motor is also increasing, which is becoming a problem.

The present invention was developed in view of the current situation, and even when conducting high-speed tests, it is not necessary to increase the capacity of the cooling fan drive motor or to increase the space for the drive motor. The objective is to provide a vehicle cooling system that can avoid

E Means for Solving the Problems In order to achieve the above object, the configuration of the present invention is such that each pair of front wheel rollers and rear wheel rollers of the chassis dynamometer protrude above the pit cover, and the front wheel roller A pair of wind guide plates are positioned on the pit cover between the pit cover and the rear wheel roller, with the tip side of each wind guide plate facing the inner end side of the front wheel roller, and the rear end side is positioned opposite the inner end side of the front wheel roller. It is characterized in that it is located opposite to the outer end of the roller.

F Effect With the above configuration, the air from the cooling fan hits the tires efficiently, the fan action by the rollers also acts effectively, and the air warmed by the front tires flows through the wind guide plate. Since it is released to the outside, this warm air does not hit the rear tires, and moreover, the air from the cooling fan is guided by the wind guide plate and hits the rear tires.

G Example Hereinafter, one example of the present invention will be described with reference to the first example which is a side view.
FIG. 2 is a perspective view, FIG. 3 is a plan view, FIG. 4 is a plan view of the wind guide plate, and FIG. 5 is a graph showing the relationship between the amount of protrusion of the roller and the cooling index, and a schematic diagram. No. 6, which is a front view.
The explanation will be based on Figures A and B.

In Figures 1 to 6 A and B, the vehicle 1 is set with front tires 3, 3 placed on front wheel rollers 2, 2, and rear tires 5, 5 placed on rear wheel rollers 4, 4. be done. The cooling fan 6 is operated by a drive motor 8 on the truck 7 and blows air toward the lower part of the vehicle 1. In the past, the rollers 2 and 4 hardly protruded from the pit cover 9, but in the present invention, they protrude by an amount H. Wind guide plates 10, 10 are arranged between the front wheel rollers 2, 2 and the rear wheel rollers 4, 4, respectively. As shown in FIG. 3, the wind guide plate 10 is configured to be rotatable around point A and on the B point side within the range shown by points B and B'. B
Vehicle 1 enters when the point side is at point B', and after vehicle 1 enters, the position of point B is adjusted with point A as the center depending on the vehicle type.
The wind guide plate 10 is supported by a hinge 12 mounted on a bracket 11, and can be rotated to be perpendicular to the pit cover 9, tilted, or rotated. In addition, in the figure, 13 is a handle, 14
is the outer cable, 15 is the inner cable, 16
1 is a ring ball, and 17 is an outer cable fixing fitting mounted on the bracket 11.

The protrusion amount H of the rollers 2 and 4 from the pit cover 9 and the cooling effect when the protrusion amount H = 0 are
The relationship with the cooling index set to 100 is as shown in FIG. 5. When H is 0 to 80 mm, as shown in FIG. 6A, the area over which cold air is sent is small and the efficiency is high. When H is larger than 200 mm, as shown in Figure 6 (b), the area to which cold air is sent becomes large and the efficiency is low. In the end, if we take into account the roller fan action effect, the amount of protrusion H is 800.
The cooling index is 120th in the range of ~200mm, increasing the cooling effect by about 20%. Of course, this graph includes the case where the wind guide plate 10 is set. Further, in the figure, 18 is another wind guide plate. As shown in FIG. 3, the wind guide plate 10 allows warm air heated by the front tires 3 to flow outside to prevent the warm air from hitting the rear tires 4, and also guides cold air from the cooling fan to the rear tires. It is working.

H. Effects of the invention As described above, according to the invention, the rollers are made to protrude from the pit cover, and a wind guide plate is provided between the front wheel roller and the rear wheel roller, so that the drive motor capacity of the cooling fan is increased. can be made smaller, the space can be made smaller, and the noise can also be made smaller. Furthermore, the amount of air from engine fans, tire fans, etc. can be reduced, and the cooling effect of the lower part of the vehicle body can also be increased.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the present invention, in which Figure 1 is a schematic side view, Figure 2 is a perspective view, Figure 3 is a plan view, and Figure 4 is a wind guide plate. 5 is a graph showing the relationship between the amount of roller protrusion and the cooling index, FIG. 6 A is a schematic front view when the amount of roller protrusion is low, and FIG. FIG. 6 is a schematic front view when the height is high. In addition, the symbols in the figure include 1 for the vehicle, 2 for the front wheel roller, 3 for the front tire, 4 for the rear wheel roller, 5 for the rear tire, 6 for the cooling fan, 9 for the pit cover, and 1 for the front wheel.
0 is a wind guide plate.

Claims (1)

[Scope of utility model registration request] A pair of front wheel rollers and a pair of rear wheel rollers of the chassis dynamometer are made to protrude above the pit cover, and a pair of wind guide plates are installed on the pit cover between the front wheel roller and the rear wheel roller. A vehicle cooling device characterized in that the leading end of the guide plate is positioned opposite to the inner end of the front wheel roller, and the rear end of the guide plate is positioned opposite to the outer end of the rear wheel roller. .