JPS61251739A - Test course for vehicle - Google Patents

Abstract

PURPOSE:To perform a test of a handling state easily and efficiently by providing many protrusions which are chamfered on edge parts corresponding to tire treads and provided side by side with a gradient by a prescribed angle with reference to a progressing direction of vehicles. CONSTITUTION:When an automobile progresses on a grooping road surface A, a transverse force component (a) acts on a tire T at a gradient part. Then, since the protrusions 1 are formed confirming to the intervals of the treads Ta of the tire T and the protrusions 1 are tilted in the progressing direction of the automobile, the transverse force in the tilting direction is generated. With reference to this, the load (b) of the automobile itself in a vertical direction acts and the reaction force (c) to the tire T is formed and unsteadiness of a handle by the vector quantity of the reaction force (c) takes place. Further, when the tilting direction of the protrusions 1 is changed, the direction of the reaction force (c) is also changed accordingly. Accordingly, a more complicated unsteady phenomenon of the handle can be easily realized by combining the gradient part in every way.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle test course for testing handling conditions.

(Prior Art) Generally, various experiments and tests are conducted when designing and manufacturing automobiles.1. Once the prototype has been completed through these stages, various driving performance tests are conducted on a test course that simulates various actual road conditions.

In connection with such various driving performance tests, there is a handling state driving test that mainly checks the nibbling performance of the tire with respect to the protrusions on the running road surface, and checks the wobbling of the steering wheel.

However, in the past, the vehicle test course generally does not have a running road surface that reproduces this wobbling of the steering wheel, and a method of confirming this by driving on a general road has been adopted.

Therefore? This was inefficient and difficult to maintain the secrecy of new models, making it necessary to conduct tests at unpopular times such as at night or early in the morning.

(Objective of the Invention) The present invention was made based on the above circumstances, and an object of the present invention is to provide a test course for vehicles equipped with a grooving road surface that is optimal for realizing steering wheel wobbling due to tire nibbling performance. It is something to do.

(Means for Achieving the Object) In order to achieve the above object, the present invention forms a running road surface by arranging a large number of protrusions with chamfered edges corresponding to the tire tread at predetermined intervals. Additionally, the plurality of protrusions as a whole are provided so as to be inclined at a predetermined angle on a horizontal plane with respect to the vehicle running direction.

(Function) According to the above means, by simply providing a large number of protrusions arranged in parallel with chamfered edges corresponding to the tire tread and inclined at a predetermined angle with respect to the direction of vehicle travel, the sway of the steering wheel can be easily prevented. It is possible to provide a vehicle test course with a grooving road surface that can reproduce the characteristics of a vehicle, making testing of handling conditions extremely easy and efficient.

(Example) FIGS. 1 to 3 show a test course for a vehicle according to an example of the present invention.

First, in FIG. 1, reference numeral 1 indicates a number of protrusions arranged in parallel on the running road surface A at predetermined intervals (for example, a pitch of 25+++ m including the grooves), and edge portions 1 a at both ends of the upper part of the protrusions are provided.
As shown in the figure, la is chamfered at a predetermined angle to correspond to the tire tread. The large number of protrusions l configured as described above are arranged at a predetermined angle (θ: l to 3 degrees) with respect to the vehicle traveling direction as shown in FIGS. 2 and 3 on the horizontal plane as a whole. ) It is installed at an angle. This inclined portion B is formed, for example, at a plurality of arbitrary locations on the grooving road surface A by sequentially changing the direction. Further, the angle of inclination θ is selected to be the optimum value to obtain the nibbling performance.

Therefore, for example, if a car is traveling on the grooving road surface A in the direction of the arrow in FIG. 3, a lateral force component as shown in FIG. a acts.

That is, since each of the protrusions l is formed to match the spacing between the treads Ta of the tire T as described above, the tips of the protrusions l fit to some extent between the treads Ta, Moreover, since the protrusion 1 is inclined with respect to the direction of travel of the automobile, a lateral force is generated in the direction of the inclination.

On the other hand, since the vertical load of the vehicle itself acts, a reaction force C is eventually formed against the tires T, and the vector amount of this reaction force C causes the steering wheel to wobble. When the direction of inclination of the protrusion 1 on the road surface A changes, the direction of the reaction force C also changes.

Therefore, by combining various types of the inclined portions B, a more complicated phenomenon of wobbling of the handle can be realized very easily.

(Effects of the Invention) As explained above, the present invention forms a running road surface by arranging a large number of protrusions with chamfered edges corresponding to the tire tread in parallel at predetermined intervals, and furthermore, The ridge is characterized in that the ridge as a whole is inclined at a predetermined angle on a horizontal plane with respect to the vehicle running direction.

Therefore, according to the present invention, the sway of the steering wheel can be easily reproduced by simply providing a large number of parallel protrusions with chamfered edges corresponding to the tire tread and inclined at a predetermined angle with respect to the vehicle traveling direction. We can provide a test course for vehicles with a grooving surface that allows for
Testing of handling conditions becomes extremely easy and efficient.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a vehicle test course according to an embodiment of the present invention, FIG. 21ii1 is a partial perspective view of the test course, and FIG. 3 is a partial perspective view of the test course. 1...Protrusion 1a...Edge part A...Grooving road surface B...Slope part T...Tire Ta...Tire tread/...・Protrusion/Lz...Edge part A...-q...Grooving road surface B...Slope part T...Tire TG...Tire tread

Claims (1)

[Claims] 1. A large number of protrusions with chamfered edges corresponding to the tire tread are arranged in parallel at predetermined intervals to form a running road surface, and furthermore, the large number of protrusions as a whole are arranged in a predetermined manner on a horizontal plane with respect to the vehicle running direction. A test course for vehicles that is characterized by being set up at an angle.