TR201910351A1 - A WARNING SYSTEM THAT ALLOWS THE VEHICLE USER NOTIFY ABOUT THE LIFES OF USE OF VIBRATION DAMPING ELEMENTS IN VEHICLES - Google Patents

Abstract

The invention consists of an outer pipe (20), an inner pipe (10) positioned concentrically with said outer pipe (20), an elastomer body (30) positioning between said outer pipe (20) and inner pipe (10) and providing connection between them. an in-vehicle warning system comprising at least one sensor (40) with a device, at least one electronic control unit (70) located on the vehicle and memory and peripherals connected thereto and generating information regarding the life of the bushing and a related vibration damping element. is the method of detection.

Description

DESCRIPTION LIFE OF VIBRATION DAMPING ELEMENTS IN VEHICLES A WARNING SYSTEM THAT ALLOWS THE VEHICLE USER TO BE NOTIFIED Technical Area The invention is used to provide vibration damping elements in vehicles by means of the sensor bushings it contains. It relates to a warning system that allows the vehicle user to be informed about their lifespan.

More specifically, the present invention provides data on different working axes and working conditions in vehicles. with a sensor assembly positioned in the bush structure that allows the collection of displacement - vibration related to measuring parameters such as force, dynamic spring constant, static spring constant It allows the vehicle user to be warned by generating information about the life of the damping element. a warning system and damping on a vehicle that allows this warning information to be produced It is related to the method of determining the lifetime of the elements.

More specifically, the present invention relates to the sensor assembly comprising a bushing on the vehicle. predetermined displacement (displacement) of the bush following the change in performance In cases where the bush operates above its value, again in a predetermined time or kilometer, It is about a life tracking and warning system that gives a warning about the remaining life and a method related to it.

State of the Art The bushings are at the connection points of the suspension parts to the vehicle chassis in motor vehicles, Reducing the vibrations and noises it is exposed to while in motion and unstable in the system specially designed and used to compensate for behavior, structure and suspension With the movement it allows, the noise and vibrations coming from the road to the vehicle are minimized and the same usually rubber, which also allows the suspension parts to move freely, rubber-metal or rubber-plastic vibration damping elements. Also called hydraulic bushing at least one channel, preferably from one room to another, containing a hydraulic fluid in it There are also bushing structures that allow it to pass through. Although traditional horoscopes Although they have a complex structure, hydraulic bushings are also an indispensable component of all bushings. which includes the rubber structure, in which all or most of the damping is provided.

Due to their functions and positions, all bushings are under loads of varying magnitudes and directions. they are working. Bushings in suspension system, radial, They are exposed to axial cardanic and torsional movements. Repetitive compression and draw The rubber part, which is exposed to (tension) loads, is constantly moving from a certain point (relaxation point). As it passes, it heats up over time and weakens the chemical bonds and starts to break after a while. is starting. As a result, the signs are subject to physical and mechanical changes over time. As it is damaged, their performance decreases accordingly and after a while, their service life decreases. they are completing.

A criterion or standard that determines the life performance of the bushings already determined by the standards. not available. The reason for this is the properties of the rubber material in the structure of the bush, according to the design and the place and location where the vehicle is mounted on the suspension system. incoming loads etc. Many factors are effective in determining the life performance of the bushings. This Therefore, the working life for each bushing may be different from each other.

Before bushing manufacturers put their bushings on the market, they must be subjected to force or any shape change. static characterization and low frequencies under repetitive loads to determine its behavior. The elastic, viscoelastic and damping properties of the products up to high frequencies are revealed. obtain results on mechanical and physical properties of bushings by performing dynamic characterization tests. is doing. However, different dynamics in one or more degrees of freedom (direction) by monitoring the physical and mechanical changes of the product by subjecting it to loads under the loading conditions how the parts will behave during their service life, that is, under real operating conditions. Fatigue and life tests are carried out in order to predict Life test, product physical While the strength test is continued until it breaks and is destroyed, the strength test of the product is It is continued until a change is seen or until a specified cycle is completed.

Fatigue tests can be performed with force or displacement control. Static to determine the behavior of the product under force or any change in shape. static spring constant (static stiffness - unit shape change in the object) by performing characterization tests the change in the value of the force required to create is being examined. These tests are performed before and after the life test or at certain intervals in the laboratory. is done in the environment. Relationship between force and deformation force-displacement curve is shown with. In a force-controlled test, the force is constant throughout the specified number of cycles. When examining the fatigue behavior of the part, the displacement change curves will be are used. This change alone is sufficient to evaluate the test result of the part. Although not, it gives information about the onset of cleavage and deformation. static value to examine the change; Before and after the fatigue test, the static of the part at the determined parameters spring constant is measured. If the change in static values is too much, the life of the sign means worsening performance. Finally, by making a visual control of the part, deformation, crack, splitting etc. in the part. Deciding on the fatigue test result by checking whether are given. Performance evaluation is carried out in the laboratory environment before the produced bushings are put on the market. performance of the bushings that are currently being used in the vehicle evaluation is provided by visual controls in the current technique and as a result, their lifespan is reduced. It is decided whether it is completed or not, that is, whether it will be changed. Your zodiac sign service life is very difficult to determine by the driver. The mentioned visual control maintenance It should be done by a person who is an expert in the subject, such as a staff member / repairman. This is a tool for the driver. entails control costs. For this reason, the controls of the bushings are usually carried out during periodic maintenance. However, in this way, between two periodic checks It is not possible to detect the bush whose performance has decreased and/or whose lifespan has expired.

Between two periodic maintenance, the bushing, which has reached the end of its life or has fallen below the critical level, reduces the comfort, negatively affecting the operation of other suspension elements. It also endanger the safe driving of the vehicle. Also, the driver driving When he notices a decrease in his comfort and takes his vehicle for service, the suspension system is very Since there are a large number of components and some components are visually inspected due to their location. It is difficult and time consuming to find the source of the problem because it is not possible. Zodiac performance visually in good condition, but with reduced service life. not replacing a bushing or similarly having a lifespan but visually bad It may be possible to change a bush that is in a condition unnecessarily.

Vibration between a first part and a second part in the patent document GB2494663A A system is provided for monitoring the damper. The system in question is a light source, light an optical sensor mounted to receive light from its source and vibration according to the output of the optical sensor It contains a processing unit that determines the amount of deformation of the damper link. But here movement in three axes as said sensor system only allows single axis measurement measurement was not available. In addition, the system mentioned in the patent document GB2494663A, It gives a warning every time the specified parameter exceeds the specified value range. However, such momentary Peak values are an accurate information about the performance of the sign and therefore its lifespan. does not give. Making a comment by evaluating these values for a certain period of time it is necessary. Every hill in the system bushing mentioned in the patent document GBZ494663A is worth warning, so a realistic performance and lifetime assessment is required. it is not possible to provide.

As a result, the performance of the bushings used on the vehicle throughout their lifetime. by following the changes in the vibration damping elements of the user or related to them. which allows the sign to have information about the remaining life of the sign, for this over a predetermined displacement, again at a predetermined time or kilometers, a warning system that gives a warning when it runs and includes a sensor bush and it The need for an in-vehicle bush life warning method regarding the present invention has arisen. caused it to pop up.

Purpose and Brief Description of the Invention The aim of the invention is to provide performance during the lifetime of the bushings used on the vehicle. It allows the user to have information about the remaining life of the sign by following the changes of the sign. for this, on the predetermined displacement value of the bush, again predetermined a warning system that gives a warning when it runs at a specified time or kilometer, and To reveal a bushing life detection method on a related vehicle.

Another object of the invention is the assembly of multiple sensors positioned in different working axes. It is to allow the measurement of the movement in three axes by revealing a bush structure containing

Another purpose of the invention is to give a warning every time the monitored parameter exceeds the determined value range. over the said value range at a predetermined period of time or It also gives a warning when it runs in kilometers.

The other purpose is that the monitored parameter is only above the specified value range. by providing a warning when it runs at a specified time or kilometer It is to provide the most realistic performance and lifetime evaluation.

Brief Description of Figures Figure 1a illustrates the preferred embodiment of the invention in which the sensor is located in the inner tube. A side section view is given.

In Figure 1b, the preferred choice of the invention is that the sensor is positioned between the inner tube and the rubber body. A side section view of the construction is given.

In Figure 2a, the preferred choice of the invention is that the sensor is located inside the rubber body. A side section view of the construction is given.

In Figure 2b, the preferred choice of the invention is that the sensor is positioned between the rubber body and the outer tube. A side section view of the construction is given.

Figure 3a shows the preferred embodiment of the invention in which the sensor is located in the outer tube. A side section view is given.

In Figure 3!), the preferred choice of the invention is that the sensor is positioned on the outer pipe butt surface. An upper section view of the construction is given.

In Figure 4a, a perspective view of the sensor bush structure, which is the subject of the present invention, is given.

In Figure 4b, the detailed technical drawing of the sensor bush structure, which is the subject of the invention, is given.

The position of the sensor bushing structures, which are the subject of the invention, on the vehicle in Figure 5a. a view is given.

In Figure 5b, it is seen that the sensor bushing structures, which are the subject of the invention, are located on the vehicle chassis. A perspective view showing the location is given.

In Figure 6, the system elements of the warning system and the interaction between them are given.

Reference Numbers 1. Horoscope 1.1. control arm bushing 1.2. lower sase sign 1.3. balance arm bushing . inner tube . external pipe . Elastomer body 40. Sensor assembly 50. Data collection system 60. Bushing life parameters database 70. Electronic control unit 80. Warning system 90. Vehicle 91. Vehicle chassis w. Torsional running direction (axial) 0. Kardenic operating direction in the X-axis (radial) Detailed Description of the Invention The present invention provides performance over the lifetime of the bushing being used on the vehicle. It allows the user to have information about the remaining life of the sign by following the changes of the sign. for this, on the predetermined displacement value of the bush, it is again predetermined. at least one sensor assembly that gives a warning when it runs within a specified time or mileage a component life warning system (80) including a bushing and a bushing life detection method on the vehicle.

Bushing containing existing sensor assembly; an outer tube (20), concentric with said outer tube an inner pipe (10) positioned between the said outer pipe (20) and the inner pipe (10) an elastomer body (30) connecting them and at least one sensor assembly (40) contains. In the preferred embodiment of the invention, rubber is used as the elastomer body (30) mentioned. material is used. In preferred embodiments of the invention, the outer tube (20) and the inner tube (10) are metal, plastic etc. can be of any material.

In a preferred embodiment of the invention, said sensor assembly 40 is a displacement measuring sensor. (for example; a fiber, piezo-electric, electromechanical) and the location in the main working axis of the bush It is positioned to measure the change. Furthermore, the vehicle with the said sensor assembly (40) (90) can also measure the force applied to the bush (1) on which the lifetime is determined. Like this In the analysis of the subject of the invention, the warning system (80) is determined by the sensor assembly on the bushing (1). (40) provides force - displacement information on the vehicle (90). In addition, available The subject of the invention is the sensor assembly (40) bushing (1) in the life warning system (80) where acceleration and bushing are located. The data obtained by measuring the temperature values in the region with the sensor device (40) will be sent to the warning system. (80) is provided.

In the present invention, the bush (1) to be determined for life is based on the dynamics on the vehicle (90). At least one sensor assembly positioned to collect data from different work axes (40) includes. Thus, it becomes possible to measure in more than one working axis. is coming. Operating directions of the sensor bush (1) which is the subject of the invention in Figures 4a and 4b. is shown. Radial movement around the X and Y axis and axial movement around the Z axis is taking place. For the axial movement around the Z axis in the aforementioned images, torsional operating direction (w), cardanic operating direction in the Y-axis for radial movement in the Y-axis For radial movement in (B) and X-axis, the kardenic operating direction (0) in the X-axis is shown.

Also, the position of the sensor bushing (1) structures, which is the subject of the present invention, on the vehicle (90). and the views showing their position on the vehicle chassis (91), respectively, in Figure 5a and Figure It is given in 5b.

In preferred embodiments of the present invention, said sensor assembly (40) is the inner tube (10) of the bush. inside, inner tube (10) outer surface, elastomer body (30), outer tube (20) inner surface, outer tube (20) inside or outside pipe (20) can be positioned on the forehead surface. Sectional views of these are presented with the visuals from Figure 1a” to Figure Bb, respectively.

In-vehicle bush life warning system containing bushing (1) with sensor assembly (40) which is the subject of the present invention. (80) the applied measurement or life determination method is basically; said sensor assembly (40) the parameter data (e.g. displacement, force, acceleration or temperature) is detected and transferred to a central processor unit on the vehicle (90). the parameter data is collected with a time stamp and stored in a memory unit, Analysis of the data by the processing unit by comparing it with predetermined normal and limit values includes the processes of giving the relevant warnings as a result of the comparison.

The system elements of the inventive warning system (80) and the interaction between them are shown in Figure 6 are given. All vibration damping elements connected to the vehicle chassis (91) on the vehicle (90), especially in the method of the invention, the displacement, force, acceleration mentioned directly from the bushings (1) or the collection of information on temperature parameters and the subject of evaluation according to these data. By commenting on the life of the bushings (1), the vehicle parts of the elements whose life is over or about to end are made. is reported to the driver. For this, as exemplified in Figure 6, each sensor assembly (40) consists of a control arm bushing (1.1), a lower chassis bushing (1.2) and a balance arm bushing (1.3). It is assumed that data is collected regularly. A data acquisition system (50) connects said data. comes from the zodiac signs. Opportunity to make comments about the lifetimes of the predetermined and signs. obtained from a database (60) of bush life parameters and data acquisition system (50) actual data is interpreted by an electronic control unit (70) by comparison. Said As a result of the comparison and decision procedure carried out by the electronic control system (70), if the measurement a statement that one or more of the signs (1) are about to expire or that their lives are over. triggers an alert system (80) if it decides. Said warning system (80) An electronic control system integrated into the control system on the vehicle or added to the vehicle later. may be part of the system. For example; vehicle (90) from the road and vehicle in accordance with the region or point on which it is positioned. (90) inside a bush (1) that moves at most ± 3 mm due to the incoming forces displacement or force data of the bush is collected by means of the sensor assembly (40) located in the bush, The average displacement or force values were calculated by analyzing the collected displacement or force data. is calculated and the previously determined time or kilometer-based control loop In case the bushing (1) is outside the maximum displacement limits in the frame It is also provided to give a warning to the technical service. Thus, the user or driver of the vehicle (90) service or the parties to whom the information should be communicated (for example, spare parts supplier, etc.) It can be conveyed that the bushing (1) on the vehicle (90) is about to expire or has expired. Thanks to the timely replacement of a bushing (1) that has expired or is about to expire, the vehicle (90) other possible damage or risks can be prevented.

The bush, which is a vibration damping tool, is under force or any shape change. Static tests are performed to determine its behavior. The interaction of this force and shape change with each other The relationship is represented by the force-displacement curve. Based on this relationship, unit shape in an object The force required for its change is called the static spring constant (stiffnes) and its unit is usually N/mm. It is denoted by ks. To examine the change in the static value; before and after the fatigue test Static spring constant measurement is made in the determined parameters. The difference in static values is large It means that the life performance of the sign deteriorates.

When interpreting the life of a sign; dynamic spring constant change, static spring constant change, displacement- force change is studied. In addition, visual control of the part is made and deformation, cracks, splitting etc. Fatigue test result is decided by checking whether it exists or not. Fatigue tests force or displacement control.

In a force-controlled test, the force is kept constant for the specified number of cycles and the bushing Fatigue behavior is examined using displacement curves. From road and vehicle (90) With the effect of the incoming forces, the bushing (1) makes a displacement movement. Scholarship (1) before starting work When the previously determined or measured displacement value increases, the life performance loss of the bush (1) It can be said that it is increasing.

In a displacement-controlled life test, the displacement is constant throughout the specified number of cycles. and the fatigue behavior of the bush (1) is examined using the force gradient curves. Force When the value decreases, it can be said that the performance loss starts to increase.

The heat energy generated in the part due to internal frictions during the movement of the bushings will extend the life of the part. is another parameter that affects Therefore, apart from displacement and force data, temperature data Also, the life of the parts can be predicted. Thanks to the bushing (1) with the sensor assembly (40) produced, the bushing (1) interacts with the other In order to eliminate the effects of suspension system elements, the first operation of the bush (1) By taking the instant static parameters as a reference, the relevant changes are analyzed according to this reference value. finalization is achieved.

A warning where the control loop is set at a predetermined distance eg 1000 km in system (80); the displacement of the bush (1) during this determined 1000 km drive of the vehicle After the values are collected by the sensor assembly (40), the distance in question is analyzed and At the end, a warning is given when the displacement value is higher than ± 3 mm.

Vehicle (90) speed, road bump etc. Due to various environmental conditions, the signs may appear from time to time, instantaneously or It can temporarily make a displacement movement outside of ± 3mm. However, the present invention parameter value (displacement value for this example) determined by the warning system (80), not every time it exceeds the threshold value (± 3mm displacement for this example), but within a specified It is also provided to give a warning when it exceeds the said threshold value throughout time. Just Giving a warning by monitoring the life by measuring force or acceleration, not by measuring displacement possible.

Claims (1)

CLAUSES ) with at least one sensor device (40) bushing (1), at least one electronic control unit (70) located on the vehicle, and memory and peripherals connected to it, and an electronic control system that generates information about the life of the bush. is and feature; the bush (1) contains at least one sensor device (40) to transmit data from the main working axis of the bush (1) to the said electronic control unit (ECU) (70) on the vehicle in which the bushing with said sensor device is located, said sensor device (40) through the vehicle (90) the displacement or force data of the bush is collected over a predetermined distance and transmitted to the said electronic control unit (70) and these are obtained by a data acquisition system (50) by the electronic control unit (70), life status is determined. preloading the parameter values determining the life of the bush to be made into a bushing life parameters database (60), collecting the displacement or force data recorded in a memory unit by collecting from at least one bushing (1) with the sensor device (40) by the electronic control unit (70) and analyzing the average displacement or Calculation of force values, predetermined time or kilometer based counter it is characterized by giving a warning to the driver and technical service in case the bush (1) is outside the maximum displacement limits within the framework of the role cycle. It is a warning method according to claim 1, its feature is; It is characterized by the process steps of detecting the parameter data determined in the rubber by means of said sensor assembly (40), collecting parameter data from the sensor assembly (40), storing the collected data, analyzing the data and comparing it with predetermined normal and/or limit values, giving warnings about the comparison aid. is to be done. It is a warning method according to claim 1, its feature is; It is related to the warning when the bush (1) operates above the predetermined displacement value, again in a predetermined time or kilometer.