KR20230152993A - How to measure the load of hanger rubber by actual vehicle test - Google Patents

Abstract

The present invention relates to a method of measuring the load of a hanger rubber, comprising a first step of providing an exhaust pipe mounting unit 200 for mounting and fixing an exhaust pipe 100, and mounting the exhaust pipe 100 on the exhaust pipe mounting unit 200. a second step, a third step of attaching a hanger latch to the installed exhaust pipe, a fourth step of processing a sensor attachment portion at a predetermined position of the hanger latch, and a third step of attaching a sensor to the sensor attachment location. Step 5, step 6 of calibrating the attached sensor, step 7 of removing the exhaust pipe to which the calibrated sensor is attached from the exhaust pipe mounting portion, and inserting a hanger rubber into the hanger latch of the removed exhaust pipe. Step 8, a ninth step of mounting the exhaust pipe into which the hanger rubber is inserted to an actual vehicle, a tenth step of performing a road driving test on the exhaust pipe mounted on the actual vehicle, and a sensor value measured during the road driving test. A method of measuring the load on the hanger rubber through an actual vehicle test is provided, characterized in that the load on the hanger rubber is obtained through an actual vehicle test through an 11th step of measuring the load on the hanger rubber.

Description

{How to measure the load of hanger rubber by actual vehicle test}

The present invention relates to a method of measuring the load of a hanger rubber, and more specifically, to a hanger through an actual vehicle test to measure the load in two axes applied to the hanger rod of the vehicle exhaust system through a road driving test with the hanger rubber inserted. This relates to the method of measuring the load on rubber.

In general, automobiles discharge combustion gases generated from the engine to the outside through exhaust pipes, and vibrations are generated in these exhaust pipes due to engine behavior and discharged combustion gases. To reduce this vibration and noise, a space is placed between the vehicle body and the exhaust pipes. Provide hangers.

In this way, the hanger for the exhaust pipe includes a hanger rod that connects the exhaust pipe and the vehicle body, and a hanger rubber that is inserted into the hanger rod to absorb and reduce vibration and noise of the exhaust pipe and the vehicle body.

In other words, the load generated by the road environment and engine behavior during driving is transmitted to the exhaust pipe through the hanger rubber, thereby reducing noise and vibration, and this load is an important factor affecting the durability of the exhaust pipe and noise generation.

These load data are important data for the design and durability testing of exhaust pipes and hangers, but in the past, there were few devices or methods to measure the load applied to these hangers.

In addition, the hanger rubber not only has various shapes and sizes depending on the type of engine, car body structure, etc., but also the load conditions acting on the exhaust pipe are very diverse, making it difficult to accurately measure the load, and there are not many load measurement methods or devices developed in the past. This situation requires development.

Republic of Korea Patent Publication No. 10-2008-0041499 Republic of Korea Patent Publication Registration No. 10-0828079 Republic of Korea Patent Publication No. 10-2010-0046330

The present invention is intended to solve the above-mentioned problems, and aims to provide a method of measuring the load of the hanger rubber through a road driving test in which the exhaust pipe is mounted on the actual vehicle with the hanger rubber inserted and the load is measured through a test on an actual road. There is a purpose.

In addition, the purpose is to provide a method of measuring the load on hanger rubber through a road driving test that can measure the load in two axes applied to the hanger latch using a stress sensor (strain gauge).

However, the object of the present invention is not limited to the object mentioned above, and other object not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, the present invention relates to a method of measuring the load of a hanger rubber, which includes a first step of attaching a hanger latch to the mounted exhaust pipe and an exhaust pipe mounting portion 200 for mounting and fixing the exhaust pipe 100. A second step of providing a second step, a third step of mounting the exhaust pipe 100 on the exhaust pipe mounting part 200, a fourth step of processing a sensor attachment portion at a predetermined position of the hanger latch, and a sensor attachment portion at the sensor attachment location. A fifth step of attaching, a sixth step of calibrating the attached sensor, a seventh step of removing the exhaust pipe to which the calibrated sensor is attached from the exhaust pipe mounting portion, and a hanger on the hanger latch of the removed exhaust pipe. An eighth step of inserting the rubber, and a ninth step of mounting the exhaust pipe with the hanger rubber inserted into the actual vehicle. The exhaust pipe mounted on the actual vehicle measures the load on the hanger rubber through a 10th step of conducting a road driving test and an 11th step of measuring the load on the hanger rubber through sensor values measured during the road driving test. A method of measuring the load of a hanger rubber through a road driving test is provided, which is characterized in that it is obtained through a road driving test.

In addition, in the first step, a hanger latch to be mounted on the exhaust pipe 100 is prepared. The hanger latch includes an attachment part 310 attached to the exhaust pipe and a fitting part 330 connected to the attachment part to insert the hanger rubber. ), and a first step of attaching the attachment portion 310 to the exhaust pipe 100 mounted on the exhaust pipe mounting portion 200 is added, but when mounting the attachment portion to the exhaust pipe, the fitting portion 330 ) A method of measuring the load of a hanger rubber through a road driving test is provided, characterized in that it is attached in a state where the center line of the hanger is arranged parallel to the ground.

In addition, a 4th step including a sensor attachment portion 340 for attaching a sensor is added to a predetermined area behind the fitting portion 330, and the sensor attachment portion 340 provided in the 4th step includes the insertion portion 340. A first surface 341 formed on one side of the unit 330 to have four surfaces on the top, bottom, left, and right sides, a second surface 343 formed on the opposite side of the first surface 341, and a third surface formed on the top surface. A method of measuring the load of a hanger rubber through a road driving test is provided, which is formed by (345) and a fourth surface (347) formed on the opposite side of the third surface (345).

In addition, a first sensor 342 is attached to the first surface 341, a second sensor 344 is attached to the second surface 343, and a third sensor ( 346) is attached, and a fourth sensor 348 is attached to the fourth surface 347, and the first surface 341 and the second surface 343 are formed to be parallel to each other and perpendicular to the ground. , the third surface 345 and the fourth surface 347 are formed to be parallel to each other and parallel to the ground.

In addition, the first sensor 342 to fourth sensor 348 is a strain gauge that is attached to the first surface 341 to fourth surface 347 and then moves according to the displacement of the first surface to fourth surface. Generates a current value,

The current value is measured to measure the load applied to the hanger rubber that is inserted into the fitting portion 330 and tested for the actual vehicle, and the first surface 341 and the axis in the direction perpendicular to the first surface and horizontal to the ground are referred to as the Y axis. And, when the axis in the direction perpendicular to the third surface 345 and the fourth surface 347 and perpendicular to the ground is called the Z axis, the first surface 341 and the second surface 343 are parallel to each other. , the third surface 345 and the fourth surface 347 are parallel, and the first surface 341 and the third surface 345 are perpendicular to the first load acting in the Y-axis direction. is disposed so that no load is applied to the third surface 345 and fourth surface 347 while applying tensile or compressive force to the first surface 341 and the second surface 343, and acts in the Z-axis direction. The second load is formed so that the load is not applied to the first surface 341 and the second surface 343 while applying a tensile or compressive force to the third surface 345 and the fourth surface 347. The first sensor 342 to fourth sensor 348 attached to the first to fourth surfaces 341 to 347 measures the amount of deformation caused by the tensile and compressive forces applied to the first to fourth surfaces. The first load and the second load are calculated, and the loads applied to the hanger rubber in the Z-axis direction and the Y-axis direction are measured through the calculated first load and the second load.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in this specification and claims should not be construed in their usual, dictionary meaning, and the inventor may appropriately define the concept of the term in order to explain his or her invention in the best way. It should be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it is.

As discussed above, according to the present invention, accurate load data can be provided by measuring the load applied to the hanger rubber through a road driving test, and through this, a hanger that can effectively prepare for the impact force applied to the hanger rubber is designed. There is an effect that can be done.

In addition, by forming four cross-sections in the hanger latch and attaching a sensor to each cross-section, the sensitivity of the sensor is increased, greatly improving deformation detection, and the load in two axes can be easily measured.

1 is a flowchart of a method for measuring the load on a hanger rubber through a road driving test according to a preferred embodiment of the present invention;
Figure 2 is a diagram schematically showing an exhaust pipe provided in an exhaust pipe mounting portion according to a preferred embodiment of the present invention;
Figure 3 is a diagram schematically showing a hanger latch attached to an exhaust pipe according to a preferred embodiment of the present invention;
Figure 4 is a cross-sectional view of portion "AA" in Figure 3;
Figure 5 is a diagram showing a hanger latch provided with a first stopper and a second stopper according to a preferred embodiment of the present invention;
Figure 6 is a graph schematically showing a figure modeling the first curve, second curve, third curve, and fourth curve as a linear function in a preferred embodiment of the present invention.
Figure 7 is a graph schematically showing a figure modeling the first curve, second curve, third curve, and fourth curve as a linear function in a preferred embodiment of the present invention.
Figure 8

Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or sizes of components shown in the drawing may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

In addition, the examples below do not limit the scope of the present invention, but are merely illustrative of the elements presented in the claims of the present invention, and are included in the technical idea throughout the specification of the present invention and constitute the scope of the claims. Embodiments that include elements that can be replaced as equivalents may be included in the scope of the present invention.

The attached Figure 1 is a flowchart of a method for measuring the load on a hanger rubber through a road driving test according to a preferred embodiment of the present invention, and Figure 2 is a schematic diagram showing an exhaust pipe provided in the exhaust pipe mounting unit according to a preferred embodiment of the present invention. Figure 3 is a schematic diagram of a hanger latch attached to an exhaust pipe according to a preferred embodiment of the present invention, Figure 4 is a cross-sectional view taken along the line "A-A" in Figure 3, and Figure 5 is a diagram showing a hanger latch attached to an exhaust pipe according to a preferred embodiment of the present invention. Figures 6 and 7 showing a hanger latch equipped with a first stopper and a second stopper according to a preferred embodiment of the present invention schematically show the first curve, the second curve, the third curve, and the fourth curve. As a graph shown, FIG. 6 is a graph modeled with a linear function and FIG. 7 is a graph modeled with a quadratic function.

As shown in FIG. 1 and below, the present invention relates to a method of measuring the load of a hanger rubber through a road driving test, including a first step (S110) comprising an exhaust pipe mounting unit 200 for mounting and fixing the exhaust pipe 100; , a second step (S120) of mounting the exhaust pipe 100 on the exhaust pipe mounting unit 200, a third step (S130) of attaching a hanger latch to the mounted exhaust pipe, and a predetermined position of the hanger latch. A fourth step of processing the sensor attachment site (S140), a fifth step of attaching a sensor to the sensor attachment location (S150), a sixth step of calibrating the attached sensor (S160), and the calibrated sensor. A seventh step (S170) of removing the attached exhaust pipe from the exhaust pipe mounting portion, an eighth step (S180) of inserting a hanger rubber into the hanger latch of the removed exhaust pipe, and placing the exhaust pipe with the hanger rubber inserted into the actual vehicle. A 9th step (S190) of mounting, a 10th step (S200) of performing a road driving test on the exhaust pipe mounted on the actual vehicle, and a load on the hanger rubber through sensor values measured during the road driving test. Through the 11th step of measuring (S210), the load applied to the hanger rubber is obtained through an actual vehicle test.

Also, referring to FIG. 2, in the third step (S130), a hanger latch to be mounted on the exhaust pipe 100 is prepared, and the hanger latch includes an attachment part 310 attached to the exhaust pipe, the attachment part, and It is connected and formed as a fitting portion 330 for inserting the hanger rubber.

In addition, step 1a of attaching the attachment portion 310 to the exhaust pipe 100 mounted on the exhaust pipe mounting portion 200 is added, and when mounting the attachment portion to the exhaust pipe, the center line of the fitting portion 330 is It is attached in a state that it is arranged parallel to the ground.

In addition, step 4a is added including a sensor attachment portion 340 for attaching a sensor to a predetermined portion behind the fitting portion 330.

In addition, referring to Figures 3 and 4, the sensor attachment part 340 provided in step 4a has a first surface 341 formed on one side to have four surfaces on the top, bottom, left, and right sides of the fitting part 330. and a second surface 343 formed on the opposite side of the first surface 341, a third surface 345 formed on the upper surface, and a fourth surface 347 formed on the opposite side of the third surface 345. is formed

In addition, a first sensor 342 is attached to the first surface 341, a second sensor 344 is attached to the second surface 343, and a third sensor ( 346) is attached, and a fourth sensor 348 is attached to the fourth surface 347.

And the first surface 341 and the second surface 343 are formed to be parallel to each other and perpendicular to the ground, and the third surface 345 and the fourth surface 347 are parallel to each other and parallel to the ground. It is formed to be like this.

In addition, the first sensor 342 to fourth sensor 348 is a strain gauge that is attached to the first surface 341 to fourth surface 347 and then moves according to the displacement of the first surface to fourth surface. Generates a current value.

Then, the current value is measured to measure the load applied to the hanger rubber that is inserted into the fitting portion 330 and tested on the actual vehicle.

In addition, the axis in the direction perpendicular to the first surface 341 and horizontal to the ground is called the Y axis, and the axis in the direction perpendicular to the third surface 345 and fourth surface 347 and perpendicular to the ground is called the Y axis. When the axis is referred to as the Z axis, the first surface 341 and the second surface 343 are parallel to each other, and the third surface 345 and the fourth surface 347 are parallel.

In addition, since the first surface 341 and the third surface 345 are perpendicular, the first load acting in the Y-axis direction is the tensile force and compressive force of the first surface 341 and the second surface 343. is placed so that no load acts on the third surface 345 and the fourth surface 347.

And the second load acting in the Z-axis direction applies tensile and compressive force to the third surface 345 and fourth surface 347, while a load is applied to the first surface 341 and second surface 343. It is formed so that it does not happen.

Therefore, the amount of deformation caused by the tensile and compressive forces applied to the first to fourth surfaces in the first sensors 342 to 448 attached to the first to fourth surfaces 341 to 347. is measured to calculate the first load and the second load, and the load applied to the hanger rubber in the Z-axis direction and the Y-axis direction is measured through the calculated first load and the second load.

At this time, when applying the first load in the Y-axis direction, tension and compression force are applied to the first surface 341 and the second surface 343, while the load is applied to the third surface 345 and the fourth surface 347. It is very important not to do this, and similarly, when applying the second load in the Z-axis direction, the tensile force and compressive force of the third surface 345 and the fourth surface 347 are applied while the first surface 341 and the second surface It is important to ensure that no load acts on (343).

For this purpose, in the present invention, a load jig 333 that can push or pull the hanger latch 330 is manufactured, and the part of the load jig that contacts the hanger latch 330 is arranged to enable point contact.

Figure 8 shows that the hanger latch is pushed or pulled through the load jig 333, and at this time, the load jig is provided with a first circular bar 331 and a second circular bar 332 spaced apart from each other and facing each other.

Accordingly, the hanger latch is positioned between the first circular bar and the second circular bar, and then the load jig is moved in the Y or Z direction to apply the first load and the second load.

At this time, the first circular bar and the second circular bar are in contact with the surface of the circular hanger latch. The first circular bar 331, the second circular bar 332, and the hanger latch 330 have a circular cross section, so they make point contact. Since the first load and the second load are applied to the hanger latch in one state, it is possible to apply the load at an accurate value.

Meanwhile, in the sixth step (S160) of correcting the attached sensor, a first load is applied to the position where the hanger rubber is inserted in the fitting portion 330, and a tensile force (or compressive force) is applied to the first surface 341. ) is input, and compression force (or tension force) is input to the second side 343, and then output from the first sensor 342 installed on the first side and the second sensor 344 installed on the second side 343. It includes step 6a of obtaining the current value.

In addition, while gradually increasing the size of the first input value of the first load, the first output value of the first sensor 342 is checked, and then a first curve is drawn through the plurality of first input values and the first output value. It includes a step 6b of obtaining and confirming the second output value of the second sensor 344, and then obtaining a second curve through the plurality of first input values and the second output value.

In addition, a second load is applied to the position where the hanger rubber is inserted in the fitting portion 330, and a tensile force (or compressive force) is input to the third surface 345 and a compressive force (or compressive force) is input to the fourth surface 347. or tensile force) is input, and then the current value output from the third sensor 346 installed on the third side and the fourth sensor 348 installed on the fourth side is obtained.

In addition, while gradually increasing the magnitude of the second input value of the second load, the third output value of the third sensor is confirmed, and then a third curve is obtained through the plurality of second input values and the third output value, Step 6b of confirming the fourth output value of the fourth sensor and then obtaining a fourth curve through the plurality of second input values and the fourth output value.

Through this, the first output value of the first sensor 342 for the first input value of the first load, the second output value of the second sensor 344, and the third sensor 346 for the second input value of the second load It includes a first correction step of obtaining the third output value of and the fourth output value of the fourth sensor 348.

In addition, referring to FIGS. 6 and 7, when the plurality of first input values forming the first curve are called V1_i and the output value of the first sensor for V1_i is U1_i, a first modeling step of the first curve is performed. ; Wow, a second modeling step of the second curve when the plurality of first input values forming the second curve are called V1_i and the output value of the second sensor for the V1_i is U2_i; Wow, the third curve A third modeling step of the third curve when the plurality of second input values forming the fourth curve are referred to as V2_i and the output value of the third sensor for the V2_i is U3_i; and the plurality of second input values forming the fourth curve are A fourth modeling step of the fourth curve is determined, assuming that V2_i is the output value of the fourth sensor for V2_i and that U4_i is the output value of the fourth sensor.

And it includes a step of analyzing the first to fourth modeling results and performing correction of the first to fourth sensors 342 to 348.

At this time, the first to fourth modeling steps for the first to fourth curves are preferably modeled with a linear function or a multi-order function depending on the characteristics of the first to fourth curves.

In one embodiment, when modeling with a linear function as shown in FIG. 6, when the plurality of first input values forming the first curve are called V1_i and the output value of the first sensor for V1_i is U1_i, the first curve is A step of defining U1_i = D1 Defining = D2 Defining = D3 = D4 D3 and E3 are obtained through U2_i and V3_i of the third curve, and D4 and E4 are obtained through U2_i and V4_i of the fourth curve to proceed with correction of the first to fourth sensors. The load of the hanger rubber can be measured. (where i= 1, 2, 3, ... n-1, n, i is an integer, and n is the maximum value of i index)

Meanwhile, in another embodiment, when modeling as a quadratic function as shown in FIG. 7, when the plurality of first input values forming the first curve are called V1_i and the output value of the first sensor for V1_i is U1_i, the first Defining a curve as U1_i = A1 x (V1_i) ² + B1 When U2_i is ^defined , the second curve is defined as U2_i = A2 When the output value of the third sensor is U3_i, defining the third curve as U3_i = A3 x (V3_i) ² + B3 x (V3_i) + C3; and a plurality of second inputs forming the fourth curve When the value is V2_i and the output value of the fourth sensor for V2_i is U4_i, defining the fourth curve as U4_i = A4 x (V4_i) ² + B4 x (V4_i) + C4 is determined.

And A1, B1, and C1 are obtained through U1_i and V1_i of the first curve, A2, B2, and C2 are obtained through U1_i and V2_i of the second curve, and A3 and B3 are obtained through U2_i and V3_i of the third curve. , C3, and calculating A4, B4, and C4 through U2_i and V4_i of the fourth curve to calibrate the first to fourth sensors. (where i = 1, 2, 3, ... n-1, n, i is an integer, n is the maximum value of i index)

Meanwhile, in the 11th step (S210), the output values of the first to fourth sensors are obtained through the actual vehicle test, and the Y axis of the hanger rubber is measured through the output value Vr1_j of the first sensor and the A1, B1, and C1. Measure Ur1_j, the actual 11th load applied in this direction.

And Ur2_j, which is the actual twelfth load applied in the Y-axis direction of the hanger rubber, is measured through the output value Vr2_j of the second sensor and the A2, B2, and C2, and the output value Vr3_j of the third sensor and the A3, B3, and C3. Ur3_j, which is the actual 21st load applied in the Z-axis direction of the hanger rubber, is measured, and the actual 22nd load applied in the Z-axis direction of the hanger rubber is measured through the output value Vr4_j of the fourth sensor and the A4, B4, and C4. Measure Ur4_j.

Accordingly, the average value of Ur1_j, which is the actual 11th load, and Ur2_j, which is the actual 12th load, is extracted to measure the load in the Y-axis direction applied to the hanger rubber, and the average value of Ur3_j, which is the actual 21st load, and Ur4_j, which is the actual 22nd load. is extracted to measure the Z-direction load applied to the hanger rubber (where j= 1, 2, 3, ... m-1, m, j is an integer, and m is the maximum value of the j index).

On the other hand, in the 11th step (S210), the actual load is specified using the first to fourth sensors through the actual vehicle test, and the output values according to the deformation of the first and second sensors are combined to produce one combined output value. It can be produced to be output as .

In this way, the actual load applied in the Y-axis direction can be directly measured using the combined output value of the first sensor and the second sensor, thereby improving the simplicity of measurement.

Therefore, if the combined output value combining the output values of the first sensor and the second sensor is called the first combined output value, and the combined output value combining the output values of the third sensor and the fourth sensor is called the second combined output value, the first combined output value is Through this, the actual load applied in the Y-axis direction can be directly measured, and the actual load applied in the Z-axis direction can be directly measured through the second combined output value, thereby improving the simplicity of measurement.

Meanwhile, in the above embodiment, the first to fourth curves were modeled as first-order and second-order functions, but it is natural that they can be modeled as first-order functions or multi-order functions depending on the sensor patent.

Meanwhile, referring to FIG. 5, in the eighth step (S180), when the hanger rubber is inserted into the hanger latch, the hanger rubber has a first first installed on one side of the hanger rubber to fix the installation position of the hanger rubber. A stopper 370 and a second stopper 371 installed on the other side are added to fix the installation position of the hanger rubber.

This is because during actual vehicle driving evaluation, the hanger rubber may move in the lateral (Y-axis) direction along the hanger latch, so in order to obtain stress data equal to the stress at the initially measured calibration position, it is recommended to use a fixing stopper to fix the position of the hanger rubber. desirable.

In addition, the first and second stoppers 370 and 371 are arranged to be detachable and are attached to both sides of the hanger rubber when inserting the hanger rubber into the hanger latch to fix the hanger rubber.

At this time, after attaching the hanger rubber to the hanger latch, it is preferable to place the first and second stoppers 370 and 371 on both sides of the hanger rubber and then attach them to fix the hanger rubber.

Although the present invention has been described in detail through specific examples, this is for detailed explanation of the present invention, and the present invention is not limited thereto, and can be understood by those skilled in the art within the technical spirit of the present invention. It is clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

100: exhaust pipe 200: exhaust pipe mounting part
310: Attachment part 330: Fitting part
340: Sensor attachment portion 341: First side
342: first sensor 343: second side
344: second sensor 345: third side
346: 3rd sensor 347: 4th side
348: 4th sensor 370: 1st stopper
371: 2nd stopper

Claims (10)

A first step of attaching a hanger latch to the installed exhaust pipe;
A second step of providing an exhaust pipe mounting unit 200 for mounting and fixing the exhaust pipe 100;
A third step of mounting the exhaust pipe 100 on the exhaust pipe mounting unit 200;
A fourth step of processing a sensor attachment portion at a predetermined position of the hanger latch;
A fifth step of attaching a sensor to the sensor attachment position;
A sixth step of calibrating the attached sensor;
A seventh step of removing the exhaust pipe to which the calibrated sensor is attached from the exhaust pipe mounting portion;
An eighth step of inserting a hanger rubber into the hanger latch of the removed exhaust pipe;
A ninth step of mounting the exhaust pipe into which the hanger rubber is inserted into an actual vehicle;
Step 10 of performing a road driving test on the exhaust pipe mounted on the actual vehicle;
An 11th step of measuring the load on the hanger rubber through sensor values measured during the road driving test; obtaining the load on the hanger rubber through an actual vehicle test. Load measurement method.
The method of claim 1, wherein in the first step,
Prepare a hanger latch to be mounted on the exhaust pipe 100, wherein the hanger latch is formed of an attachment part 310 attached to the exhaust pipe and a fitting part 330 connected to the attachment part to insert a hanger rubber. Method of measuring the load of hanger rubber through testing.
According to paragraph 2,
A first step of attaching the attachment portion 310 to the exhaust pipe 100 mounted on the exhaust pipe mounting portion 200 is added, and when mounting the attachment portion to the exhaust pipe, the center line of the fitting portion 330 is on the ground. A method of measuring the load of a hanger rubber through an actual vehicle test, characterized in that it is attached in a state arranged parallel to the.
According to paragraph 1,
A method of measuring the load of a hanger rubber through an actual vehicle test, characterized in that a 4th step is added including a sensor attachment part 340 for attaching a sensor to a predetermined area behind the fitting part 330.
According to paragraph 4,
The sensor attachment part 340 provided in step 4a includes a first surface 341 formed on one side to have four surfaces on the top, bottom, left, and right sides of the fitting part 330, and an opposite side of the first surface 341. A hanger through actual vehicle testing, characterized in that it is formed by a second surface 343 formed on the upper surface, a third surface 345 formed on the upper surface, and a fourth surface 347 formed on the opposite side of the third surface 345. How to measure the load of rubber.
According to clause 5,
A first sensor 342 is attached to the first surface 341, a second sensor 344 is attached to the second surface 343, and a third sensor 346 is attached to the third surface 345. is attached, and a fourth sensor 348 is attached to the fourth surface 347,
The first surface 341 and the second surface 343 are formed to be parallel to each other and perpendicular to the ground, and the third surface 345 and the fourth surface 347 are parallel to each other and parallel to the ground. A method of measuring the load of a hanger rubber through an actual vehicle test, characterized in that it is formed as much as possible.
According to clause 6,
The first sensor 342 to fourth sensor 348 is a strain gauge, which is attached to the first surface 341 to fourth surface 347 and then changes the current value according to the displacement of the first surface to fourth surface. generates,
A method of measuring the load on a hanger rubber through an actual vehicle test, characterized in that the current value is measured to measure the load applied to the hanger rubber that is inserted into the fitting portion 330 and tested on an actual vehicle.
In clause 7,
The axis in the direction perpendicular to the first surface 341 and horizontal to the ground is referred to as the Y axis, and the axis in the direction perpendicular to the third surface 345 and fourth surface 347 and perpendicular to the ground is referred to as Z. When it comes to axis,
The first surface 341 and the second surface 343 are parallel to each other, the third surface 345 and the fourth surface 347 are parallel, and the first surface 341 and the third surface 347 are parallel to each other. Since the surface 345 is vertical, the first load acting in the Y-axis direction exerts tensile and compressive force on the first surface 341 and the second surface 343 and the third surface 345 and the fourth surface 345. It is arranged so that no load acts on the surface 347,
The second load acting in the Z-axis direction applies tensile and compressive force to the third surface 345 and fourth surface 347 while preventing the load from being applied to the first surface 341 and second surface 343. As it is formed,
The amount of deformation caused by the tensile force and compressive force applied to the first to fourth surfaces in the first sensors 342 to 448 attached to the first to fourth surfaces 341 to 347 is measured. Through an actual vehicle test, which is characterized by measuring the first load and the second load and measuring the load applied to the hanger rubber in the Z-axis direction and the Y-axis direction through the calculated first load and second load. How to measure the load of hanger rubber.
The method of claim 8, wherein the sixth step is to calibrate the attached sensor.
A first load is applied to the position where the hanger rubber is inserted in the fitting portion 330, and a tensile force (or compressive force) is input to the first surface 341 and a compressive force (or tensile force) is input to the second surface 343. Step 6a of obtaining the current value output from the first sensor 342 installed on the first side and the second sensor 344 installed on the second side 343 after allowing this to be input;
Gradually increasing the size of the first input value of the first load, confirming the first output value of the first sensor 342, and then obtaining a first curve through the plurality of first input values and the first output value, , a 6b step of checking the second output value of the second sensor 344 and then obtaining a second curve through the plurality of first input values and the second output value;
A second load is applied to the position where the hanger rubber is inserted in the fitting part so that tension (or compression force) is input to the third surface 345 and compression force (or tension force) is input to the fourth surface 347. A 6c step of obtaining the current value output from the third sensor 346 installed on the third side and the fourth sensor 348 installed on the fourth side;
While gradually increasing the magnitude of the second input value of the second load, the third output value of the third sensor is confirmed, and then a third curve is obtained through the plurality of second input values and the third output value, and the third curve is obtained through the plurality of second input values and the third output value. Step 6b of checking the fourth output value of the four sensors and then obtaining the fourth curve through the plurality of second input values and the fourth output value.
The first output value of the first sensor and the second output value of the second sensor with respect to the first input value of the first load, and the third output value of the third sensor and the fourth output value of the fourth sensor with respect to the second input value of the second load. A method of measuring the load of a hanger rubber through an actual vehicle test, comprising a first correction step of obtaining an output value. According to clause 9,
A first modeling step of the first curve when a plurality of first input values forming the first curve are referred to as V1_i and the output value of the first sensor for the V1_i is U1_i;
A second modeling step of the second curve when a plurality of first input values forming the second curve are referred to as V1_i and the output value of the second sensor for the V1_i is U2_i;
A third modeling step of the third curve when a plurality of second input values forming the third curve are referred to as V2_i and the output value of the third sensor for the V2_i is U3_i;
When the plurality of second input values forming the fourth curve are called V2_i and the output value of the fourth sensor for V2_i is U4_i, a fourth modeling step of the fourth curve is determined;
A method of measuring the load of a hanger rubber through an actual vehicle test, characterized in that the first to fourth modeling results are analyzed to correct the first sensor (342) to the fourth sensor (348).