KR102314899B1 - Reduced tire testing method for indoor simulation testing - Google Patents

Abstract

The disclosed single-axis tire test method for an indoor simulation test includes: a first step of collecting data measured in a tire real-vehicle wear evaluation to produce a first driving file; a second step of selecting a noise section having a small effect on the actual vehicle in the first driving file; a third step of removing a noise section from the first driving file; and a fourth step of manufacturing the second drive file by connecting the first drive file from which the noise section is removed, so that the indoor test time can be shortened.

Description

A single-axis tire testing method for indoor simulation testing

The present invention relates to a single-axis tire test method for an indoor simulation test, and more particularly, to an improvement in an indoor test mode for reproducing a value measured in a tire real-vehicle wear evaluation with an indoor wear evaluation device.

In general, tire wear means that the thickness of the tread compound, which is the tire surface rubber in contact with the ground, decreases as the vehicle is driven for a long time.

The wear performance of tires shows various differences depending on the operating purpose of the tire itself (car, truck, heavy equipment, etc.), aspect ratio, or tire pattern.

In addition, the wear performance of the tire is different depending on the rubber properties such as crosslinking properties, viscoelasticity and hardness of the compound itself.

In order to measure the wear performance of tires that differ according to various conditions, tire manufacturers conduct a dedicated test and 1 For more than a year, we have been conducting a commercial test that runs on any road surface without any set conditions.

However, due to differences in vehicle type, road/environment, road surface condition, and climate, even if the test conditions are strictly controlled in the actual vehicle test, it becomes impossible to measure the difference in the results of changes in compound and structure.

The indoor wear test device provides many possibilities to replace the actual vehicle wear test.

If you create a driving file with the values obtained through road load data acquisition (RLDA) and input it to the indoor wear tester, you can measure the tire performance change within approximately 7 days regardless of the difference in external factors. .

In general, in order to reproduce the values measured in the actual vehicle wear evaluation with the indoor wear evaluation device, the values measured in the actual vehicle wear evaluation must go through the process of unit conversion and noise removal to fit the indoor wear evaluation device.

The indoor test mode reproduced by the indoor wear evaluation device through the above process has a problem that it takes a lot of time.

Korean Patent Application Laid-Open No. 10-2010-0048133, 'Method for evaluating the wear of the tire surface of a vehicle' is a method for evaluating the wear of the tire surface of a vehicle that allows the degree of wear of the tire surface to be evaluated based on the measurement of the temperature of the tire surface. is disclosed about it.

However, Korea Patent Laid-Open Patent No. 10-2010-0048133 No. 10-2010-0048133 Although the actual vehicle wear evaluation time can be shortened by running a short course, the time cannot be shortened when reproduced with the indoor wear evaluation device because the measured data is used as it is.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shortened tire test method for an indoor simulation test capable of shortening the indoor test time.

The above object is to collect the data measured in the actual vehicle wear evaluation of the tire, the first step of producing a first drive file; a second step of selecting a noise section having a small effect on the actual vehicle in the first driving file; a third step of removing a noise section from the first driving file; and a fourth step of manufacturing the second drive file by connecting the first drive file from which the noise section has been removed.

In addition, the above object may be achieved by a uniaxial tire test method for an indoor simulation test, which may further include a fifth step of verifying the secondary driving file.

In addition, the above object may be achieved by a short-axis tire test method for an indoor simulation test that can determine whether a noise section is removed through rainflow analysis in the fifth step.

Further, the above object can be achieved by a single-axis tire testing method for indoor simulation testing, in which the first step can collect lateral force and torque data.

In addition, the above object can be achieved by a single-axis tire test method for indoor simulation test, in which the first step can further collect speed, inclination angle, test load and camber angle data.

In addition, the above object can be achieved by a single-axis tire test method for an indoor simulation test in which the second step can select a section with low lateral force as a noise section.

In addition, the above object can be achieved by a single-axis tire test method for an indoor simulation test that can select a section with low torque as a noise section.

In addition, the above object can be achieved by a single-axis tire test method for an indoor simulation test that can select a section in which the lateral force and torque are low at the same time as the noise section in the second step.

In addition, the above object is to be achieved by a single-axis tire test method for an indoor simulation test in which step 2 can select a section with low lateral force and torque as a noise section at the same time as any one of speed, inclination angle, test load or camber angle. can

In addition, the above object can be achieved by a single-axis tire test method for an indoor simulation test in which the noise section can be selected as a section that is repeated for 15 to 30 seconds.

According to the single-axis tire test method for the indoor simulation test according to the present invention, the first step of collecting data measured in the actual vehicle wear evaluation of the tire to produce a first driving file; a second step of selecting a noise section having a small effect on the actual vehicle in the first driving file; a third step of removing a noise section from the first driving file; and a fourth step of manufacturing the second drive file by connecting the first drive file from which the noise section is removed, so that the indoor test time can be shortened.

In addition, according to the uniaxial tire test method for the indoor simulation test according to the present invention, a fifth step of verifying the secondary driving file may be further included, thereby minimizing errors between the actual vehicle wear evaluation and the indoor test.

In addition, according to the uniaxial tire test method for the indoor simulation test according to the present invention, in the fifth step, it is possible to determine whether the noise section is removed through rain flow analysis, so it is possible to easily determine the error between the actual vehicle wear evaluation and the indoor test. have.

In addition, according to the uniaxial tire test method for the indoor simulation test according to the present invention, in the first step, since lateral force, torque, speed, inclination angle, test load and camber angle data can be collected, the noise section is determined based on various values. can be selected

In addition, according to the uniaxial tire test method for the indoor simulation test according to the present invention, in the second step, a section having low lateral force can be selected as a noise section, so a section having no influence of the lateral force on the actual vehicle can be selected as noise.

In addition, according to the uniaxial tire test method for the indoor simulation test according to the present invention, in the second step, a section having low torque can be selected as a noise section, so a section having no effect of torque on the actual vehicle can be selected as noise.

In addition, according to the uniaxial tire test method for the indoor simulation test according to the present invention, in step 2, a section with low lateral force and torque can be selected as a noise section. can be selected

In addition, according to the single-axis tire test method for the indoor simulation test according to the present invention, in step 2, any one of speed, inclination angle, test load, or camber angle and a section in which lateral force and torque are low at the same time can be selected as a noise section, A section in which the actual vehicle is not affected by any one of speed, inclination angle, test load, or camber angle, and lateral force and torque can be selected as noise.

In addition, according to the shortened tire test method for the indoor simulation test according to the present invention, since the noise section can be selected as a section that is repeated for 15 to 30 seconds, it is possible to prevent abrupt movement of the indoor wear evaluation device.

1 is a flowchart of a uniaxial tire test method for an indoor simulation test according to the present invention.
2 is a schematic diagram illustrating an indoor wear evaluation apparatus for performing a uniaxial tire test method for an indoor simulation test according to the present invention.
3 is a graph of torque data obtained through actual vehicle road load data measurement according to the present invention.
4 is a graph of lateral force data obtained through actual vehicle road load data measurement according to the present invention.
5 is a graph of a first drive file according to the present invention.
6 is a graph of the secondary drive file according to the present invention.
7 is a torque comparison graph by rain flow analysis according to the present invention.
8 is a lateral force comparison graph by rain flow analysis according to the present invention.
9 is a table comparing the indoor wear evaluation according to the present invention with the actual vehicle wear evaluation.
10 is a graph comparing the indoor wear evaluation according to the present invention with the actual vehicle wear evaluation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, in describing the present invention, descriptions of already known functions or configurations will be omitted in order to clarify the gist of the present invention.

The method for measuring the abrasion performance of a pneumatic tire according to the present invention may use the indoor wear evaluation device 10 to conduct a study on the abrasion performance of a tire according to a change of a vehicle and a study on the wear performance of a tire according to a change of a course.

In addition, the method for measuring abrasion performance of a pneumatic tire according to the present invention may perform a study on noise and vibration characteristics of a tire using the indoor wear evaluation device 10 .

2 is a schematic diagram illustrating an indoor wear evaluation apparatus 10 for performing a uniaxial tire test method for an indoor simulation test according to the present invention.

Referring to FIG. 2 , the indoor wear evaluation apparatus 10 includes a drum 3 , a spindle unit 2 , and a spray unit 4 .

The drum 3 is provided with sandpaper on the surface to be electrically rotated and the speed can be controlled.

The spindle part 2 is rotatably mounted on the tire 1 in contact with the surface of the drum 3 , the mounted tire 1 can be rotated, and the lateral force and camber of the mounted tire 1 . Angles and slip angles can be generated.

The lateral force refers to a load applied from the outer circumferential surface of the tire 1 in the width direction of the tire 1 .

It is preferable that a sector plate 5 is provided on the surface of the drum 3 to replace and attach sandpaper of various standards.

The injection unit 4 may spray talc on the surface of the tire 1 .

The spindle unit 2 may include a tire rotating unit on which the tire 1 is mounted and capable of rotating the mounted tire 1, a lateral force, camber angle, and slip angle to the tire mounted on the tire rotating unit. has a structure

The structure of the spindle part 2 has the same structure as that of an actual automobile wheel, and the tire 1 is rotated with the rotational force transmitted from the motor or engine, and the tire 1 is driven by steering of the steering wheel while driving. It has a structure capable of generating lateral force, camber angle, and slip angle, and since it is a structure that can be realized with the same structure as that of an actual automobile wheel, a more detailed description will be omitted.

Preferably, the spindle part 2 is disposed on both sides of the drum 3 so that two tires 1 manufactured under different conditions can be tested at the same time.

Referring to FIG. 1 , a single-axis tire test method for an indoor simulation test according to a preferred embodiment of the present invention includes: a first step of collecting data measured in a tire actual vehicle wear evaluation to produce a first driving file; a second step (S2) of selecting a noise section having a small effect on the actual vehicle in the first driving file; a third step of removing the noise section from the first driving file (S3); and a fourth step (S4) of manufacturing the second driving file by connecting the first driving file from which the noise section is removed.

The single-axis tire test method for an indoor simulation test according to a preferred embodiment of the present invention may further include a fifth step (S5) of verifying the second driving file.

Referring to FIGS. 3 to 5 , the first step S1 is a process of collecting data measured in a tire actual vehicle wear evaluation for an indoor simulation test and manufacturing a first driving file using the collected data.

The data may be obtained through actual vehicle road load data acquisition (RLDA).

The first step (S1) may collect lateral force and torque data in order to manufacture the first drive file.

The first step (S1) may further collect data such as speed, inclination angle, test load, and camber angle in order to manufacture the first drive file.

The lateral force, torque, speed, inclination angle, test load, and camber angle data are factors affecting tire wear, noise and vibration in actual vehicle wear evaluation.

The data may be divided into a noise section having a small effect on the actual vehicle and a remaining section having a large effect on the actual vehicle.

The data may be expressed as values over time.

The first drive file collects data such as lateral force, torque, speed, inclination angle, test load, and camber angle measured in the actual vehicle wear evaluation, and is expressed as a value over time.

Referring to FIG. 5 , the second step ( S2 ) is a process of selecting a portion having a small effect on the tire in the first driving file manufactured in the first step ( S1 ) as a noise section.

The noise section has a small effect on the tire in data such as lateral force, torque, speed, inclination angle, test load and camber angle measured in the actual vehicle wear evaluation.

The noise section may be repeatedly analyzed using an analysis tool such as an RPC program.

If the noise section is selected as a section that is repeated for 15 to 30 seconds, rapid movement of the indoor wear evaluation device 10 can be prevented.

For example, the noise section means a section in which the vehicle is stopped for reasons such as waiting for a traffic signal or a section in which the vehicle moves at a low speed on a flat surface.

For the noise section, a portion having a small influence on the tire may be selected from one of the data.

For the noise section, a reference may be set as necessary.

The noise section may be combined by selecting a portion having a small effect on the tire from a plurality of the data.

For the noise section, a section having low lateral force or torque may be selected.

For the noise section, a section (shaded portion in FIG. 5 ) in which lateral force and torque are simultaneously low may be selected.

3 and 4, for example, the noise section may be selected as a section that simultaneously satisfies a section in which the lateral force is 0 to ±1000N and a section in which the torque is 0 to ±500Nm.

For the noise section, any one of speed, inclination angle, test load, or camber angle, and a section in which lateral force and torque are simultaneously low may be selected.

5 to 6 , the third step ( S3 ) is a process of removing a noise section from the first driving file.

A case in which a section in which the lateral force and torque are simultaneously low is selected as a noise section will be described as an example.

In the lateral force data of the actual vehicle wear evaluation, a section with low lateral force (for example, a straight section) and a section with a low torque (for example, a flat or downhill section) in the torque data of the actual vehicle wear assessment can be selected as the noise section. can

When the time portion corresponding to the noise section is removed from the first drive file, the time section corresponding to the noise section must be removed from data such as speed, inclination angle, test load or camber angle of actual vehicle wear evaluation.

That is, in the third step (S3), all of the time portion selected as the noise section must be removed from all data constituting the first driving file.

Referring to FIG. 6 , the fourth step ( S4 ) is a process of manufacturing the second driving file by connecting the separated primary driving file by removing the noise section.

The second driving file is obtained by removing the noise section having a small effect on the actual vehicle from the first driving file and connecting the rest.

The second driving file is a file used in the indoor wear evaluation device 10 .

As can be seen from the table comparing the indoor wear evaluation of FIG. 9 with the actual vehicle wear evaluation, when the second driving file is used in the indoor wear evaluation device 10, the time required for the indoor simulation test can be significantly reduced. .

As can be seen from the graph comparing the indoor wear evaluation of FIG. 10 with the actual vehicle wear evaluation, when the second driving file is used in the indoor wear evaluation device 10, the indoor wear evaluation shows a graph similar to the actual vehicle wear evaluation. do.

As can be seen from FIGS. 9 and 10 , the indoor wear evaluation using the secondary driving pile can confirm the effect of reducing the time by about 50% on average in each RLDA course.

As can be seen from FIGS. 9 and 10 , the indoor wear evaluation using the second driving file removes the noise section having a small effect on the actual vehicle, so that the long-time real-vehicle wear evaluation can be reproduced with the short-time indoor wear evaluation.

The indoor wear evaluation can obtain a result almost similar to the actual vehicle wear evaluation, and can be applied to a severe damage analysis method.

An indoor test mode may be established by comparing the results of the indoor simulation test using the second driving file in the indoor wear evaluation device 10 with the results of the actual vehicle wear evaluation.

The fifth step (S5) is a process of verifying whether a noise section has been removed from the second driving file.

In the fifth step (S5), it can be determined whether the noise section has been removed by comparing the first driving file and the second driving file.

7 to 8 , in the fifth step ( S5 ), rainflow analysis may be used to easily determine whether the noise section has been removed.

In the graphs of FIGS. 7 to 8 , the upper black line is a graph of the actual vehicle wear evaluation, the lower blue line is a graph of the indoor wear evaluation, and the black line and the blue line indicate similar types.

In the graphs of FIGS. 7 to 8 , a portion raised in the middle is a noise section, and a portion close to the horizontal axis is a section necessary for indoor wear evaluation.

As can be seen from the graphs of FIGS. 7 to 8 , it can be confirmed that the noise section of the second driving file is removed and the section required for indoor wear evaluation has little effect by using the rainflow analysis.

The method for measuring wear performance of a pneumatic tire according to the present invention removes a noise section from a first drive file according to a predetermined standard, and connects the separated first drive file with the noise section removed to connect the second drive file can be created automatically.

The method for measuring wear performance of a pneumatic tire according to the present invention may include a program capable of editing the primary driving file into the secondary driving file according to a predetermined standard.

In the foregoing, specific embodiments of the present invention have been described and shown, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have

Therefore, such modifications or variations should not be individually understood from the technical spirit or viewpoint of the present invention, and it should be said that the modified embodiments belong to the claims of the present invention.

1: tire
2: Spindle part
3: drum
4: injection part
5: Sector plate
10: Indoor wear evaluation device

Claims (10)

A first step of producing a first drive file by collecting the lateral force and torque data measured in the tire actual vehicle wear evaluation;
a second step of selecting a noise section having a small effect on the actual vehicle in the first driving file;
a third step of removing the noise section from the first driving file;
a fourth step of manufacturing a second driving file by connecting the first driving file from which the noise section is removed; and
Comprising a fifth step of verifying through rainflow analysis whether the noise section has been removed by comparing the second drive file with the first drive file,
In the second step, a straight section with low lateral force or a flat or downhill section with low torque is selected as a noise section,
A shortened tire test method for an indoor simulation test, characterized in that it is possible to shorten the indoor test time. delete delete delete delete delete delete According to claim 1,
The second step is a single-axis tire test method for an indoor simulation test, characterized in that selecting a section in which the lateral force and torque are low at the same time as the noise section. delete According to claim 1,
The short-axis tire test method for an indoor simulation test, characterized in that the noise section is selected as a section that is repeated for 15 to 30 seconds.

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