JPH03242523A - Exhaust gas tester for automobile - Google Patents

Abstract

PURPOSE:To achieve a higher testing accuracy by arranging a model of an automobile provided at a U-turn section in which a running belt moves from one to another lane, a lane separating section formed by partitions adapted to let the running belt pass and a lid and a gas suction device within the lane separating section. CONSTITUTION:A running belt 2 and a model 1 of an automobile move to one to another lane passing through openings of partitions 3a-3d at a lane separating section 3 of a U-turn section 11. The partitions 3a-3d are provided between both the lanes to isolate and a gas which is carried by a running air of the model 1 of a running automobile to be brought into the lane separating section 3 of the U-turn section 11 is sucked with a gas suction device 12 from inside the lane separating section 3 formed by the partitions 3a-3d and a lid 3e. This can prevent the penetration of the gas into the other lane at the U turn section.

Description

DETAILED DESCRIPTION OF THE INVENTION: (Industrial Field of Application 2 This invention 8;!) relates to an automobile exhaust gas testing device for examining the diffusion, etc. of automobile exhaust gas.

: Conventional technology: In the area where the expressway is planned to be constructed',;! There are places where accumulation of exhaust gas becomes a problem, such as in topography and tunnels where it is expected that automobile exhaust gas will not be able to diffuse sufficiently. In such locations, it was necessary to investigate the effects of wind on vehicles running at high speed, and wind tunnel experiments were conducted as follows.

That is, as shown in FIG. 5, a wind tunnel measurement chamber 1 through which wind 7 flows
An endless running belt 2 is provided that moves in opposite directions (in the direction of arrow 4) along two parallel lanes within the 0, and a plurality of car models 1 are attached to the belt 2 to create an actual car. It simulates the driving conditions of The running belt 2 moves across the ground model part 5, and is provided with a flat plate part S outside the range of the ground model part 5: a U-turn part II, 11 of the running belt 2. In addition, the method of generating exhaust gas was one in which a large number of point sources were used in the very vicinity of the running belt 2 connecting the automobile model 1.

Therefore, the exhaust gas is blown in the direction of the traveling belt 4 and the traveling direction 4 of the automobile model 1 by the traveling wind.

The U-turn portion 11 is in direct contact with the outside air, and the automobile model 1 changes direction on a flat plate.

[Problems to be Solved by the Invention] According to the conventional experimental device described above, the gas carried by the traveling wind at the U-turn section 11 also makes a U-turn to the opposite lane, and the experimental results are affected by the behavior of the exhaust gas outside the model range. The experimental results differ depending on how the U-turn section 11 is installed on the topography model section 5 or in the wind tunnel measurement room 10.

The present invention aims to provide an automobile exhaust gas testing device that solves the above problems.

[Means to solve the problem]

The present invention provides an automobile exhaust gas testing device comprising a terrain model section, an endless running belt that moves in opposite directions along two parallel lanes, and a car model attached to the running belt, in which the running belt is It is equipped with a lane separation section formed of a partition wall and a lid, which is provided at a U-turn section where the vehicle moves from one lane to the other lane, through which a model car and a running belt can pass, and a gas suction device within the lane separation section.

[Effect]

In the present invention, the running belt and the automobile model move from one lane to the other lane through an opening in a bulkhead of a lane separation section at a U-turn.

A bulkhead is installed between the two lanes to separate them, and gas carried by the wind from a moving car model and brought into the lane separation at the U-turn is removed from the same lane separation formed by the bulkhead and lid. The gas is sucked from inside by the gas suction device, and the U
This prevents gas from flowing into the other lane at the turn. This avoids the influence of gases entering the test area and provides accurate test results.

[Example] A first example of the present invention will be described with reference to FIGS. 1 and 2.

This embodiment is the same as the embodiment shown in FIG. 5 by adding a lane separation section and a gas suction pipe, which will be described below. Corresponding parts are given the same reference numerals and their explanation will be omitted.

Reference numeral 3 designates lane separation portions provided at the U-turn portions 11 of the running belts 2 on both sides. The same lane separation section 3 is surrounded by partition walls 38 to 3d having a rectangular planar shape and a lid 3e covering the partition walls 38 to 3d. The partition wall 3a is arranged at right angles to the moving belt 2, and the partition wall 3b is arranged parallel to the lane.
A model inlet 1.3 and a model outlet 14 are provided which open at a and 3b, respectively. The partition wall 3c is connected to the partition wall 3a,
The partition walls 3e are opposite to the partition walls 3b. Furthermore, a gas suction pipe 12 is provided on the wind tunnel floor 16 within the lane separation section 3.

In this embodiment, the automobile model 1 moving with the running belt 2 moves from one lane to the other lane through the model population 13 of the bulkhead 3a and the model outlet 14 of the bulkhead 3b.

The gas carried by the wind when the car model l is running is transported to the lane separation section 3.
The gas enters into the lane and is sucked in by the gas suction pipe 12 at the same lane separation section 3, and is prevented from exiting or exiting from the model exit 14 to the other lane side. This prevents the gas brought in by the wind from the car model 1 traveling in one lane from flowing into the other lane, and does not disturb the air flow in the other lane, resulting in accurate test results. can be obtained.

A second embodiment of the present invention will be explained with reference to FIGS. 3 and 4.

The differences between this embodiment and the first embodiment are as follows. That is, topographical model sections 5 are provided at both ends of the lane, and hollow shaping sections 6 are provided outside of the topographical model sections 5 to fill in the stepped portions.
were installed consecutively. A tunnel model 15 extending diagonally downward and outward through which the traveling belt 2 and the automobile model 1 pass is formed in the terrain model part 5 and extending over both lanes, and a shaping part 6 is connected to the tunnel model 15. A U-turn portion 11 of the running belt 2 is provided inside. Further, a lane separation section 3 formed by rectangular partition walls 3a to 3d and a lid 3e is provided in the shaping section 6 as in the first embodiment, and a gas suction pipe 12 is provided at the bottom of the lane separation section 3. It is being

In this embodiment as well, similarly to the first embodiment, the lane separation section 3 and the gas suction pipe 12 prevent gas from being carried into the other lane by the wind caused by the car model 1 traveling in one lane. Can be done.

[Effects of the Invention] In the conventional device, the test results were influenced by the fact that the gas carried by the wind of the car model in one lane was diverted to the other lane by the U-turn portion of the running belt. However, in the present invention, by providing the above-mentioned lane separation section and the gas suction device from the same lane separation section, the disadvantages of the above-mentioned conventional devices can be eliminated, and the test accuracy can be improved.

[Brief explanation of drawings]

FIG. 1 is a plan view of the first embodiment of the present invention, and FIG. 2 is a plan view of the first embodiment of the present invention.
3 is a plan view of the second embodiment of the present invention, FIG. 4 is a sectional view taken along the FIG. 3 is a plan view of the test device. 1... Car model, 2... Running belt 3.
- Lane separation part, 3a, 3b, 3c, 3d - Partition wall 3e... Lid 4 - Running belt and running direction of car model 5 - Terrain model part, 6... Shaping part 10... Wind tunnel measurement room 12...Exhaust gas suction pipe 14...Model exit agent

Claims (1)

[Claims] In an automobile exhaust gas testing apparatus that includes a terrain model section, an endless running belt that moves in opposite directions along two parallel lanes, and a car model attached to the running belt, the running belt moves from one lane to the other. It is characterized by having a lane separation section formed by a partition wall and a lid that is provided at the U-turn section where the vehicle moves to the other lane and has an opening through which the automobile model and the running belt can pass, and a gas suction device within the same lane separation section. Automobile exhaust gas testing equipment.