KR20140106828A - Break performance test apparatus and test method of tire - Google Patents

Abstract

The present invention relates to a brake performance test device for a tire and a test method. The brake performance test device comprises a performance test part for testing the brake performance of a tire on a wet road surface and a dry road surface by simulating the real driving state of a vehicle and the state of real road surfaces; and a central control part for analyzing the brake performance of the tire by acquiring information measured by the performance test part. Using the brake performance test device for a tire and the test method, the present invention can evaluate the brake performance of the tire since the grip force and frictional force of the tire on the dry road surface and the wet road surface are measured by simulating the driving state of the vehicle and the state of the road surfaces indoors.

Description

TECHNICAL FIELD [0001] The present invention relates to a braking performance test apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for testing a braking performance of a tire for testing a braking performance of a tire by applying various test environments in a room.

The braking performance test of a tire is divided into wet grip test and dry grip test depending on whether it is sprayed or not. Traction test and grip test according to the slip rate range, .

Recently, according to the regulations of the tire efficiency rating system established to improve the stability of tires, domestic and foreign tire companies and various testing institutes have conducted tests such as rolling resistance (RR) and wet road surface friction test .

The wet road surface braking performance test of the tire is performed by operating the test equipment directly from the outside (test road surface of the driving test ground).

These wet tire braking performance tests are divided into the actual vehicle test and the trailer test method. Mostly, the trailer test method with excellent repeatability is mainly used.

As described above, when the braking performance of the tire is tested and measured while traveling on the actual road surface, the testability is determined according to the external weather environment.

In particular, it is not possible to perform the test at a low temperature of less than about 5 占 폚 in the rainy or winter season, or at a high temperature of more than 35 占 폚 in the summer, and the rubber as the main component of the tire is sensitive to the external environment do.

In addition, since the test is conducted by operating the test equipment directly, the test technique for measuring the braking performance of the tire according to the prior art has a problem in that a deviation of the result from the deviation and repeated measurement there was.

In addition, since the technique of testing the braking performance of the tire according to the prior art can not always be performed in the same test environment, there is a problem that a large deviation occurs in the results of the braking performance test between the test tires.

To solve such a problem, an example of a technique for testing a braking performance of a tire in a room is disclosed in Patent Documents 1 to 3 below.

Patent Document 1 discloses a drive test apparatus for evaluating grounding characteristics of a tire which can control precise test conditions and obtain a result while simplifying the structure of an apparatus for evaluating and measuring ground pressure, ground shape, friction energy and the like among dynamic characteristics of a tire Lt; / RTI >

Patent Document 2 discloses a static static tester in which conditions of the tire finished product are made using the tire test piece in the state that the tire is not the finished product so as to obtain the basic characteristic value when the tire finished product is manufactured.

Patent Document 3 discloses a measuring device capable of performing a dynamic test not only when traveling on a road surface having an inclination angle in various directions in a room but also when cornering at high speed.

Korean Patent Publication No. 10-2006-0060322 (published on June 5, 2006) Korea Patent Registration No. 10-0693450 (Announcement on March 12, 2007) Korean Patent Publication No. 10-0061860 (published on July 23, 2003)

However, the apparatus for testing the tire performance in the room according to the prior art including the patent documents 1 to 3 does not describe a configuration for testing the braking performance of the wet road surface.

Therefore, it is necessary to develop a technique that can test the braking performance in accordance with the tractive force, the frictional force, and the rotational resistance in the wet road surface and the dry road surface condition of the tire irrespective of the external environmental conditions of the outdoor environment or the driving behavior of the tester.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and a method for testing a braking performance of a tire capable of testing a braking performance and a rotational resistance performance on a wet road surface and a dry road surface of a tire .

Another object of the present invention is to provide an apparatus and a method for testing a braking performance of a tire which can test a braking performance of a tire in a room and remove a test error due to an influence of an external environment condition and an operation tendency of a tester.

In order to achieve the above-mentioned object, a tester for testing a braking performance of a tire according to the present invention includes a performance test section for testing a braking performance of a tire in a wet road surface and a dry road surface state by simulating a running state and an actual road surface state of an actual vehicle, And a central control unit for acquiring information measured by the performance testing unit and analyzing the braking performance of the tire.

According to another aspect of the present invention, there is provided a method of testing a braking performance of a tire, the method comprising the steps of: (a) measuring a braking performance of the tire, (B) running the tire at a predetermined speed to test the braking performance on the tire test rod, and (c) evaluating the braking performance of the tire using the information measured in the step (b) And a control unit.

As described above, according to the tester braking performance testing apparatus and method of the present invention, the running state and the road surface condition of the vehicle are simulated in the room to measure the tractive force and the frictional force in the dry road surface and the wet road surface state of the tire, The braking performance of the engine can be evaluated.

In other words, according to the tester braking performance test apparatus and test method of the present invention, the test time can be shortened by performing the test at the same time by installing the reference tire and the tire to be tested on two or more running modules .

According to the test apparatus and the test method of the tire according to the present invention, two reference tires and a maximum of six test tires are tested at the same time, thereby shortening the test time and improving the repeatability of the test result Can be obtained.

Further, according to the tester braking performance test apparatus and test method of the present invention, it is possible to quickly and accurately evaluate the tire braking performance in a dry road surface and a wet road surface condition by measuring the maximum friction coefficient generated in the braking operation in the tire test rod Effect is obtained.

Further, according to the tester braking performance testing apparatus and method of the present invention, it is possible to control the temperature and humidity of the road surface and the test space of the tire test rod by using the control unit, A test for analyzing the influence on the braking performance of the tire can be performed together with the braking performance test.

1 is a block diagram of an apparatus for testing a braking performance of a tire according to a preferred embodiment of the present invention.
2 is a schematic configuration diagram of a performance test section,
3 is a detailed block diagram of the drive unit shown in Fig. 2,
4 is an exemplary view for explaining the operation of the drive unit for each section of the tire test load of the road surface simulation unit shown in FIG. 2,
5 is an enlarged view of the road surface simulation unit shown in FIG. 4,
FIG. 6 is a flowchart for explaining steps of testing a braking performance of a tire according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and a method for testing a braking performance of a tire according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an apparatus for testing a braking performance of a tire according to a preferred embodiment of the present invention.

In the present embodiment, the braking performance test of the tire is performed by a state of the road surface, that is, a test of dry and dry wet road surface and a test of friction.

That is, the present invention simulates the running state and the road surface state of the vehicle in the test space in the room, and tests the braking performance including the tractive force and the frictional force of the tire in each road surface state.

For this purpose, as shown in FIG. 1, the apparatus for testing the braking performance of a tire according to the preferred embodiment of the present invention simulates the running state of an actual vehicle and the actual road surface state, and determines the braking performance of the tire in a wet road surface and a dry road surface state And a central control unit 20 for obtaining information measured by the performance testing unit 10 and the performance testing unit 10 to be tested and analyzing the braking performance of the tire.

The performance test section 10 includes a drive unit 30 for running a tire by simulating the running state of an actual vehicle, a road surface provided with a tire test road for testing the braking performance of the tire by simulating the actual road surface condition The measuring unit 50 measures the braking performance of the tire exerted by the simulation unit 40 and the road surface simulation unit 40 and the central control unit 20 to measure the information measured by the measuring unit 50, (60) that transmits the data to the mobile station (20).

The performance testing unit 10 includes a control unit 70 for controlling the operation of the drive unit 30 and the road surface simulation unit 40 based on the control signal of the central control unit 20, And an adjustment unit 80 for adjusting environmental conditions.

The configuration of the performance testing unit will be described in detail with reference to FIGS. 2 and 3. FIG.

Fig. 2 is a schematic configuration diagram of the performance test section, and Fig. 3 is a detailed configuration diagram of the drive unit shown in Fig.

The drive unit 30 serves to simulate the running state of the actual vehicle and provide the vehicle body load and the braking force of the braking device to the tire.

2 and 3, the drive unit 30 is provided between the upper and lower rails 31 and 32 and the upper and lower rails 31 and 32, which are vertically arranged to run the tire, A traveling module 33 installed to travel the tire according to the running state of the actual vehicle, an actuator 34 for transmitting a load added to each tire in the actual vehicle to the tire, A braking module 35 for transferring the braking torque to the tire, and a speed sensor 36 for sensing the rotational speed of the wheel on which the tire is mounted.

A measuring unit 50 may be installed on the wheel on which the tire is mounted.

The measurement unit 50 includes a load cell and measures force and moment in the x, y, and z axes of the tire under the condition that the braking torque of the braking module 35 is applied.

The upper and lower rails 31 and 32 are each formed in an elliptical shape as shown in FIG.

Both ends of the lower rail 32 can be inclined so as to maintain the test speed in the high-speed test.

3, the traveling module 33 includes an installation member 331 installed vertically between the upper and lower rails 31 and 32 and moving along the upper and lower rails 31 and 32, A rotating shaft 332 mounted horizontally on one side of the member 331 and rotatably mounted on the one end of the member 331 and a driving shaft 332 for generating a driving force to move the tire along the upper and lower rails 31, (Not shown) that rotates the motor.

The mounting member 331 is formed in the shape of a bar and a bearing can be coupled to the upper and lower ends of the mounting member 331 so that the mounting member 331 can move along the upper and lower rails 31 and 32 have.

The tire is coupled to the rotary shaft 332 in a state where the tire is mounted on the wheel, and receives the driving force of the driving motor and rotates while traveling in contact with the road surface.

The running module 33 can run at a predetermined speed, for example, a speed of about 50 to 65 km / h, in the same manner as the braking performance test process of a tire using an actual vehicle.

The actuator 34 is installed in the member and serves to transmit a load applied to the tire in the actual vehicle to the tire in the test load application period of the tire test rod of the road surface simulation unit 40 to be described below.

For example, the actuator 34 may be provided with a linear actuator that stretches and operates in accordance with the control signal of the control unit 70 to apply or stop the load on the tire.

The braking module 35 is installed on one side or both sides of the disk 351 and the disk 351 provided on the rotating shaft and applies a braking torque to the disk 351 in accordance with the control signal of the control unit 70, (Electro-Mechanical Brake) 352 that generates an electric signal.

The speed sensor 36 may be provided as an encoder for sensing the rotational speed of the wheel.

FIG. 4 is an exemplary view for explaining the operation of the drive unit for each section of the tire test rod of the road surface simulation unit shown in FIG. 2, and FIG. 5 is an enlarged view of the road surface simulation unit shown in FIG.

As shown in Figs. 4 and 5, the road surface simulation unit 40 is provided with a tire test rod 41 for testing the braking performance of the tire by simulating the environment in which the tire travels on the road surface in the actual vehicle.

The tire test rod 41 includes a test load application section A for applying a test load corresponding to the load of the vehicle body to the tire, a braking section B for measuring the braking performance of the tire in a state in which the braking module 35 is operated, And a test load release section C for releasing the test load applied to the tire.

5, the road surface simulation unit 40 includes a plate 42 for simulating a road surface of a road, at least one injection nozzle 41 for spraying water so as to simulate a wet road surface condition, And a circulation module 44 for collecting and circulating water sprayed on the plate 43 and the plate 42.

A drain hole 45 is formed at one side of the plate 42, that is, on the side opposite to the side where the injection nozzle 43 is provided, for transmitting the water sprayed on the road surface to the water collecting space 46 under the plate 42, A circulation pump (not shown) for pumping the water collected through the drain hole 45 to the spray nozzle 43 may be installed.

A filter member (not shown) may be installed between the circulation pump and the spray nozzle 43 to remove foreign substances contained in the water.

Accordingly, the present invention can test the braking performance of the tire according to the road surface condition by simulating the dry road surface and the wet road surface condition in the tire test rod provided in the road surface simulation unit.

The control unit 70 controls the operation of the traveling module 33 so as to run the tire along the upper and lower rails 31 and 32 and controls the operation of the vehicle body And controls the operation of the actuator 34 and the braking module 35 to transmit or stop the load and the braking torque.

That is, when the tire enters the test load application section A of the tire test rod 41, the control unit 70 generates a control signal for operating the actuator 34 to transmit the load of the vehicle body to the tire.

When the tire enters the braking section B, the control unit 70 generates a control signal for operating the braking module 35 to apply the braking cock to the tire.

The control unit 70 also controls so that the load of the vehicle body and the braking torque are not applied to the tire while the tire is traveling in the test load release period C of the tire test rod.

1, the control unit 80 includes a heating module for heating and controlling the temperature and humidity according to the control signals of the temperature sensor and the humidity sensor and the control unit for sensing the temperature and humidity of the road surface and the test space of the tire test rod, . ≪ / RTI >

The heating module may be provided with various types of heating means such as a heat wire or a hot air fan.

The central control unit 20 analyzes the information acquired by the information acquisition unit 21 and the information acquisition unit 21 for acquiring and storing the information measured by the performance test unit 10, Unit 22 as shown in FIG.

The central control unit 20 communicates with the communication unit 60 of the performance testing unit 10 to transmit a control signal for controlling the operation of the performance testing unit 10, And a communication module (23) for receiving the communication module (23).

The communication module (23) of the communication unit (60) of the performance testing unit (10) and the central control unit (20) can be connected in a wired or wireless communication manner.

For example, the communication unit 60 and the communication module 23 can perform communication in a telemtry manner.

The information obtaining unit 21 may include a memory for storing the measurement information received via the communication module 23. [

The central control unit 20 controls the operation of the performance testing unit 10 according to a test cycle preset to test the braking performance of the reference tire and the at least one test target tire at the same time and analyzes the information of the measured braking performance of each tire .

To this end, it is preferable that at least two traveling modules 33 are provided in the driving unit 30 of the performance testing unit 10. [

For example, the information analysis unit 22 sets the test cycle according to the number of the reference tire R and the number of the tires T to be tested as shown in Table 1 below, and sets the maximum friction coefficient Ra .

Table 1 shows the number of tires to be tested and the maximum friction coefficient of the tire to be tested according to the test cycle.

According to test cycle
Number of tires to be tested Tires to be tested The maximum coefficient of friction (Ra) 1 (R1-T1-R2) T1 1/2 (R1 + R2) 2 (R1-T1-T2-R2) T1 2 / 3R1 + 1 / 3R2 T2 1 / 3R1 + 2 / 3R2 3 (R1-T1-T2-T3-R2) T1 3 / 4R1 + 1 / 4R2 T2 1/2 (R1 + R2) T3 1 / 4R1 + 3 / 4R2

Here, T1, T2, and T3 are the tires to be tested, and Ra is the maximum friction coefficient of each tire under test in the test cycle.

The maximum coefficient of friction of the reference tire and the tire under test can be expressed using the average peak power coefficient (μ _{peak, ave} ) as shown in Table 2 below.

Table 2 shows the average peak power coefficient table of the test tire.

Test tire Average Peak Power Factor Reference tire mu _{peak , ave} (R) = Ra Tires to be tested mu _{peak , ave} (T) = Ta

Accordingly, the information analysis unit can calculate the wet grid index of the wet road surface using Equation (1) or Equation (2) below.

Here, t is the test and the wet temperature (℃) of the test to a destination Thai (T), t ₀ is a reference temperature condition of wet road surface and the normal tire 20 ℃, winter tires 10 _℃, μ _{p e ak, The} constant a is set to -0.4232 for the normal tire, 0.7721 for the winter tire, the constant b is set to -8.297 for the normal tire, 31.18 for the winter tire, and _ave (R ₀ ) is set to 0.85 for the reference tire under the reference condition. Can be set.

As described above, according to the present invention, the braking performance of a tire in a dry road surface and a wet road surface state of a tire in a room can be measured, and the braking performance of a tire can be accurately compared by comparing measurement information of a reference tire and measurement information of a tire to be tested.

Next, a method of testing a braking performance of a tire according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

FIG. 6 is a flowchart for explaining steps of testing the braking performance of a tire according to a preferred embodiment of the present invention.

In the present embodiment, a description will be given using a case in which a reference tire and three tires to be tested are successively installed in each running module 33 while a pair of running modules 33 are installed in the drive unit 30 .

However, the present invention is not limited to this, and it is also possible to test a reference tire and one or two test subject tires, or to sequentially install two reference tires and two to six test subject tires, It may be changed to test at the same time.

In the present embodiment, the braking performance is tested in a wet road surface condition after the braking performance is tested in a dry road surface condition. However, the present invention is not limited to the case where the order is changed as required, It may be changed to test only the braking performance.

As shown in FIG. 6, in the method of testing a braking performance of a tire according to a preferred embodiment of the present invention, the performance testing unit 10 and the central control unit 20 are driven while power is supplied from a power supply unit (not shown) (S10).

The central control unit 20 generates a control signal to control the operation of the performance testing unit 10 according to a previously stored program and controls the communication module 23 to transmit the control signal to the performance testing unit 10. [

The control unit 70 of the performance testing unit 10 then controls the performance testing unit 10 to test the braking performance in the dry road surface state according to the control signal of the central control unit 20 received via the communication unit 60. [ (Step S11).

More specifically, the control unit 70 sequentially enters the reference tire installed between the upper and lower rails 31 and 32 and at least one of the tires to be tested into the tire test rod 41 of the road surface simulation unit 40 The operation of each traveling module 33 of the driving unit 30 is controlled.

When the first running module 33 equipped with the reference tire enters the tire test rod 41 and the reference tire enters the test load application section A, the control unit 70 controls the actuator of the first running module 33 So that the load applied to the tire in the actual vehicle is applied to the reference tire.

Then, when the reference tire enters the braking section B, the control unit 70 controls the operation of the braking module 35 provided in the first running module 33 so as to apply the braking torque to the reference tire.

Then, the measuring unit 50 measures the force and moment in the x, y, and z axes of the reference tire under the condition that the braking torque is applied by the braking module 35. [

At this time, the communication unit 60 transmits the measured information from the measurement unit 50 to the central control unit 20.

The communication module 23 of the central control unit 20 receives the measured information, and the information obtaining unit 21 collects the received information and stores it in a memory provided therein.

Then, the information analyzing unit 22 calculates the grounding force and the frictional force in the dry road surface state of the reference tire using the collected information, analyzes the calculated result, and stores the analyzed result in the memory of the information obtaining unit 21 (S12).

Subsequently, in step S13, the control unit 70 enters the tire under test into the tire test rod 41 of the road surface simulation unit 40 to test the braking performance of the tire under test (S13)

The central control unit 20 calculates the grounding force and the frictional force in the dry road surface state of the tire under test by collecting the information measured by the performance testing unit 10, analyzes the calculated results, To evaluate the braking performance (S14).

Then, the central control unit 20 controls the information acquisition unit 21 to store the braking performance evaluation result of the tire under test again in the memory.

In step S15, the central control unit 20 checks whether the test of all the tires to be tested has been completed, and repeats the steps S13 to S15 until all the tires tested are completed. .

The control unit 70 operates the injection nozzle 43 provided in the road surface simulation unit 40 in accordance with the control signal of the central control unit 20 to control the tire test load (Step S16).

Subsequently, the control unit 70 performs the braking performance test of the reference tire and the tire under test in the wet road surface state in steps S17 and S18, and the central control unit 20 calculates the braking performance of the tire to be tested The performance is evaluated and the result of the evaluation is stored.

In step S19, the central control unit 20 checks whether the test of all the tires to be tested has been completed, and repeats the steps S18 to S19 until all the tires tested are completed. .

When the test of all the tires to be tested is completed in step S19, the central control unit 20 stops the operation of the tester's braking performance testing apparatus and terminates.

On the other hand, during the braking performance test of the tire described above, the control unit 80 senses the temperature and humidity of the test surface and the road surface of the tire test rod 41 using the temperature sensor and the humidity sensor, ) Detects the rotational speed of the wheel.

The control unit 70 then transmits the information sensed by the control unit 80 and the speed sensor 36 to the central control unit 20 via the communication unit 60. [

The central control unit 20 may store the received information in a memory and generate a control signal for controlling the operation of the heating module provided in the control unit 80 to adjust the temperature and humidity of the road surface and the test space of the tire test rod .

Accordingly, the present invention can also carry out a test for analyzing the influence of the road surface of the tire test rod and the environmental condition of the test space on the braking performance of the tire.

Through the above-described process, the present invention can evaluate the braking performance of a tire by measuring the running state and the road surface state of the vehicle in the room and measuring the tractive force and the frictional force in a dry road surface and a wet road surface state of the tire.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The present invention is applied to a technique for evaluating the braking performance of a tire by simulating the running state and the road surface state of a vehicle in a room to measure a tractive force and a frictional force in a dry road surface and a wet road surface state of the tire.

10: performance test section 20: central control section
21: information acquisition unit 22: information analysis unit
23: communication module 30: drive unit
31, 32: upper rail, lower rail 33: travel module
331: mounting member 332:
34: actuator 35: braking module
351: Disk 352: Electronic brake unit
36: speed detector 40: road surface simulation unit
41: tire test rod 42: plate
43: injection nozzle 44: circulation module
45: drain hole 50: measuring unit
60: communication unit 70: control unit
80: Control unit

Claims (18)

A performance test section 10 for testing the braking performance of the tire on the wet road surface and the dry road surface state by simulating the running state and the actual road surface state of the actual vehicle,
And a central control unit (20) for acquiring information measured by the performance testing unit (10) and analyzing the braking performance of the tire. The apparatus of claim 1, wherein the performance testing unit (10)
A drive unit (30) for running the tire by simulating the running state of the actual vehicle,
A road surface simulation unit 40 provided with a tire test rod 41 for testing the braking performance of the tire by simulating the actual road surface condition,
A measurement unit 50 for measuring the braking performance of the tire exerted by the road surface simulation unit 40,
And a communication unit (60) communicating with the central control unit (20) and transmitting the measured information from the measurement unit (50) to the central control unit (20)
Wherein at least one of the drive units (30) is provided. The apparatus of claim 2, wherein the performance testing unit (10)
A control unit 70 for controlling the operation of the drive unit 30 and the road surface simulation unit 40 based on the control signal of the central control unit 20,
Further comprising an adjustment unit (80) for adjusting environmental conditions such as temperature and humidity inside the test surface and the road surface of the tire test rod (41)
The control unit 70 controls the operation of the drive unit 30 so as to test the braking performance according to the set test period by setting the test period of the reference tire and the tire to be tested according to the number of tires to be tested Tester braking performance test apparatus. 4. The apparatus according to claim 2 or 3, wherein the drive unit (30)
Upper and lower rails 31 and 32 arranged up and down to run the tire,
A traveling module 33 installed between the upper and lower rails 31 and 32 for traveling the tire according to the traveling state of the actual vehicle,
An actuator 34 for transmitting a load added to each tire to the tire in an actual vehicle,
A braking module 35 installed on a rotating shaft on which a tire is mounted to simulate braking torque generated in an actual vehicle and transmit the braking torque to a tire,
And a speed sensor (36) for sensing the rotational speed of the wheel on which the tire is mounted. 5. The method of claim 4,
Wherein both side ends of the lower rail (32) are inclinedly installed so as to maintain a test speed in a high speed test. 5. The method of claim 4,
The measuring unit (50) comprises a load cell,
Wherein the force and moment in the x, y, and z axes of the tire are measured while the braking torque of the braking module (35) is applied. 7. The apparatus according to claim 6, wherein the traveling module (33)
An installation member 331 vertically installed between the upper and lower rails 31 and 32 and moving along the upper and lower rails,
A rotation shaft 332 installed at one side of the installation member 331 in a horizontal direction and having a tire rotatably mounted at one end thereof,
And a driving motor for generating a driving force to rotate the rotary shaft (332) so as to move the tire along the upper and lower rails (31,32). 5. The method of claim 4,
The tire test rod 41 includes a test load application section A for applying a test load corresponding to a load of the vehicle body to a tire and a braking section B for measuring a braking performance of the tire in a state in which the brake module 35 is operated And a test load release section (C) for releasing a test load applied to the tire. 9. The system according to claim 8, wherein the road surface simulation unit (40)
A plate 42 for simulating the road surface of the road,
At least one spray nozzle 43 disposed at one side of the plate 42 for spraying water,
And a circulation module (44) for collecting and circulating the water sprayed on the plate (42). 10. The method of claim 9,
A drain hole 45 is formed at one side of the plate 42 to transmit water sprayed on a road surface to a collecting space 46 below the plate 42,
The circulation module 44 includes a circulation pump installed in the water collecting space 46 and pumping to transfer water collected through the drain hole 45 to the injection nozzle 43,
And a filter member installed between the circulation pump and the injection nozzle (43) for removing foreign matter contained in water transferred to the injection nozzle (43). 2. The apparatus of claim 1, wherein the central control unit (20)
An information acquisition unit 21 for acquiring and storing information measured by the performance testing unit 10,
An information analysis unit 22 for analyzing the information acquired by the information acquisition unit 21 to evaluate the braking performance of the tire,
A communication unit 60 for communicating with the communication unit 60 of the performance testing unit 10 to transmit a control signal for controlling the operation of the performance testing unit 10 and for receiving data measured by the performance testing unit 10 And a module (23) for controlling the braking performance of the tire. 12. The method of claim 11,
The information obtaining unit 21 includes a memory for storing measurement information received via the communication module 23,
The information analyzing unit 22 evaluates the braking performance of the tire by setting a test cycle according to the number of reference tires and the tire to be tested, calculating the maximum friction coefficient of the tire to be tested,
The central control unit 20 controls the operation of the performance testing unit 10 according to a test cycle preset to test the braking performance of the reference tire and the at least one test target tire at the same time, And the result is stored in the memory. (a) simulating a tire test rod provided in a room according to a road surface condition to be tested for braking performance of the tire on a wet road surface or a wet road surface condition,
(b) running the tire at a preset speed to test the braking performance on the tire test rod and
(c) evaluating the braking performance of the tire using the information measured in the step (b). 14. The method of claim 13, wherein step (a)
(a1) injecting water onto the road surface of the tire test rod using the injection nozzle when the braking performance of the tire is tested in a wet road surface state, and
(a2) collecting water sprayed on the road surface of the tire test rod into a collecting space, and supplying the collected water to the injection nozzle again. 15. The method of claim 14, wherein step (a)
(a3) detecting the temperature and humidity of the road surface of the tire test rod and the test space, and operating the control unit according to the detection result to adjust the temperature and humidity. . 14. The method of claim 13, wherein step (b)
(b1) when the tire enters the test load application period of the tire test rod, simulating and transmitting the load applied to the tire in the actual vehicle,
(b2) applying a braking torque to the tire using the braking module when the tire enters the braking section of the tire test rod,
(b3) measuring forces and moments in the x, y, and z axes of the tire while the braking torque is applied to the tire in the step (b2); and
(b4) removing the test load applied to the tire when the tire enters the test load release section of the tire test rod. 17. The method of claim 16, wherein step (b)
A test cycle of a reference tire and a tire to be tested is set according to the number of tires to be tested, and the braking performance is performed in accordance with the set cycle. 14. The method of claim 13, wherein step (c)
Calculating the maximum friction coefficient of the tire using the information measured in the step (b), and evaluating the grounding force and the frictional force of the reference tire and the tire to be tested on a dry road surface or a wet road surface state using the calculated maximum friction coefficient A method for testing a braking performance of a tire.

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