Vehicle operating condition simulation system and application method

Abstract

The present invention discloses a vehicle working condition simulation system, comprising a support device fixedly connected to a car wheel hub to simulate a wheel and a control device connected to the support device capable of collecting height data and load data of the support device and changing the height of the support device, wherein the support device comprises a base placed horizontally to measure the load of the support device, a telescopic member whose bottom end is laterally fixed to the base and can swing in a fan shape along the longitudinal direction of the base, and an angle table indicating the angle between the base and the telescopic member is provided between the base and the telescopic member; the control device comprises a programmable controller, and the programmable controller contains a tire load-tire radius correspondence. The present invention also provides an application method of the vehicle working condition simulation system, which is applied to the vehicle working condition simulation system as described above.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile testing, and in particular to a vehicle operating condition simulation system and an application method. Background Art

[0002] During the process of automobile R&D and manufacturing, calibration and verification of prototype vehicles is the key R&D work, among which the testing and verification of the vehicle chassis is the top priority. The testing and verification of the vehicle chassis is to detect the working conditions of the suspension and tires, obtain the changes of the suspension and tires under different loads, and obtain the quality of R&D and the direction of improvement through comparative analysis. In the bench test and measurement process commonly used in the industry, the tire blocks the suspension measurement and needs to be removed or replaced, but it affects the working condition and the dynamic monitoring of the tire's own state (such as camber angle), which is also a technical problem in the industry.

[0003] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0004] The object of the present invention is to provide a vehicle operating condition simulation system and an application method that can accurately simulate tire operating conditions.

[0005] The present invention provides a vehicle working condition simulation system, comprising a support device fixedly connected to a car wheel hub for simulating a wheel and a control device connected to the support device capable of collecting height data and load data of the support device and changing the height of the support device, wherein the support device comprises a base placed horizontally for measuring the load of the support device, a telescopic member whose bottom end is transversely fixed to the base and can swing in a fan shape along the longitudinal direction of the base, and an angle meter indicating the angle between the base and the telescopic member is provided between the base and the telescopic member;

[0006] The control device includes a programmable controller, which contains a tire load-tire radius correspondence. The programmable controller is used to collect load data of the support device and substitute the tire load-tire radius correspondence into the tire load-tire radius correspondence to obtain the tire radius and change the height of the telescopic member with reference to the tire radius.

[0007] Furthermore, the telescopic part includes a cylinder body connected to the base and controlled by the control device to inflate and deflate, a piston rod driven by the pressure in the cylinder body to move up and down relative to the cylinder body, and a flange plate that fixes the piston rod to the automobile wheel hub.

[0008] Furthermore, the telescopic part also includes a height sensor for measuring the height of the supporting device and transmitting the height data to the control device, the height sensor includes a static slide fixed on the cylinder body and a dynamic slide fixed on the piston rod which can move with the piston rod and is in sliding contact with the static slide, and the dynamic slide can send different electrical signals to the control device when the relative position of the dynamic slide and the static slide is different.

[0009] Furthermore, the cylinder body is connected to the base via a rotating pin, and the cylinder body can swing in a longitudinal fan shape around the central axis of the rotating pin.

[0010] Furthermore, the angle gauge includes a scale plate fixed on the base and a pointer fixed on the cylinder body and capable of swinging with the cylinder body, the scale plate is marked with scales, and the front end of the pointer points to the scales on the scale plate.

[0011] Furthermore, a load sensor connected to the programmable controller for measuring load data of the supporting device is provided on the base.

[0012] Furthermore, the control device also includes a pressure pump connected to the programmable controller for pressurizing the cylinder body and a pressure relief valve for relieving pressure from the cylinder body.

[0013] The present invention also provides an application method of a vehicle operating condition simulation system, which is applied to the vehicle operating condition simulation system as described above, and includes steps S1 to S3, wherein step S1 is to connect the automobile wheel hub disk with the telescopic part, and the supporting device simulates the tire; step S2 is for the programmable controller to collect the load data and height data of the supporting device, and substitute the load data into the tire load-tire radius correspondence to obtain the corresponding tire radius and change the height of the telescopic part with reference to the corresponding tire radius; step S3 is to record the data of the angle table and the data of the automobile suspension.

[0014] Furthermore, the step S2 includes steps S21 to S22, wherein the step S21 is that the programmable controller collects load data and height data of the supporting device, and substitutes the load data into the tire load-tire radius correspondence to obtain the corresponding tire radius; the step S22 is that the programmable controller compares the height data and the corresponding tire radius, and changes the height of the telescopic member until the height data of the supporting device is equal to the corresponding tire radius.

[0015] Furthermore, the control device also includes a pressure pump connected to the programmable controller for pressurizing the cylinder body and a pressure relief valve for relieving pressure from the cylinder body; the step S22 is that the programmable controller compares the height data and the corresponding tire radius, and changes the height of the telescopic part by pressurizing the cylinder body through the pressure pump or relieving pressure from the cylinder body through the pressure relief valve until the height data of the support device is equal to the corresponding tire radius.

[0016] The vehicle working condition simulation system provided by the present invention simulates and replaces the tire through the support device, and will not block the suspension during measurement, and the suspension data can be directly measured without frequently disassembling and installing the tire; through the programmable controller with a built-in tire load-radius equation, the height of the support device can be directly adjusted according to the vehicle load to simulate the tire of the corresponding radius; the telescopic part can swing along the longitudinal direction of the base, which is different from the traditional fixed tire bracket auxiliary detection and is more in line with the actual working condition; the tire inclination is detected in real time through the angle meter, making the chassis posture measurement more convenient, intuitive and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structural connection of the vehicle operating condition simulation system according to the first embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the support device in the vehicle operating condition simulation system;

[0019] Figure 3 for Figure 2 A schematic diagram of the structure of the telescopic member in the supporting device after the flange and the height sensor are hidden;

[0020] Figure 4 for Figure 2 A schematic structural diagram of the base and the rotating pin in the supporting device;

[0021] Figure 5 for Figure 2 Structural schematic diagram of the angle meter in the supporting device

[0022] Figure 6 for Figure 3 A schematic structural diagram of a height sensor in the telescopic member;

[0023] Figure 7 for Figure 1 A connection diagram of a control device in the vehicle operating condition simulation system;

[0024] Figure 8 for Figure 7 An equation diagram of the tire load-tire radius correspondence in the control device. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] Please refer to Figures 1 to 8 The embodiment of the present invention provides a vehicle operating condition simulation system, which is used for testing and verifying the chassis of a whole vehicle during the process of automobile research and development and manufacturing, and includes a support device 10 and a control device 20 connected to the support device 10. The support device 10 includes a base 11, a telescopic member 12, and an angle meter 13. The base 11 is placed horizontally and a load sensor 111 for measuring the load of the support device 10 is provided on the base 11. The telescopic member 12 is connected to the base 11 and can swing in a fan shape along the longitudinal direction of the base 11. The angle meter 13 is used to indicate the angle between the telescopic member 12 and the base 11.

[0027] Please refer to Figures 2 to 5 The telescopic member 12 includes a cylinder body 121, a piston rod 122, a flange 123 and a height sensor 124. One end of the flange 123 is connected to the piston rod 122, and the other end is fixedly connected to the wheel hub of the vehicle. One end of the piston rod 122 extends into the cylinder body 121, and the pressure in the cylinder body 121 can drive the piston rod 122 to move up and down relative to the cylinder body 121. The cylinder body 121 is connected to the base 11 through the rotating pin 112 so that the cylinder body 121 can swing longitudinally in a fan shape around the central axis of the rotating pin 112 (such as Figure 4 The angle gauge 13 includes a scale plate 131 and a pointer 132. The scale plate 131 is fixed on the base 11 and is perpendicular to the upper surface of the base 11. The pointer 132 is fixed on the cylinder 121 and can swing with the cylinder 121 (as shown). Figure 5 The scale plate 131 is marked with scales indicating angles, and the front end of the pointer 132 points to the scales on the scale plate 131.

[0028] When the pointer 132 swings with the cylinder 121, the pointer 132 points to different scales on the scale plate 131, and the indicated scale is the angle between the support device 10 and the horizontal plane. The support device 10 is fixedly connected to the automobile wheel hub to simulate the automobile tire. By recording the scale of the angle meter 13, the camber angle of the tire in the vehicle chassis test can be recorded. In other embodiments, the angle meter 13 can also be connected to the control device 20, and the angle meter 13 transmits the angle data to the control device 20 after analog-to-electric conversion, and the control device 20 can record and output the tire camber angle data.

[0029] The vehicle working condition simulation system provided by this embodiment has a telescopic member 12 that can swing longitudinally along the base 11, which is different from the traditional fixed tire bracket auxiliary detection and is more in line with actual working conditions. The tire inclination is detected in real time through the angle meter 13, making the chassis posture measurement more convenient, intuitive and accurate.

[0030] like Figure 6 As shown, the height sensor 124 includes a static slide 1241 and a dynamic slide 1242. The static slide 1241 is fixed on the cylinder body 121, and the dynamic slide 1242 is fixed on the piston rod 122 and can move up and down with the piston rod 122. The front end of the dynamic slide 1242 is in sliding contact with the static slide 1241. The height sensor 124 is connected to the control device 20. When the relative positions of the dynamic slide 1242 and the static slide 1241 are different, different electrical signals can be sent to the control device 20. The heights represented by different electrical signals are pre-set in the control device 20, and the height of the support device 10, that is, the radius of the tire simulated by the support device 10, can be measured by the height sensor 124.

[0031] The cylinder body 121 is provided with a connecting hole 1211, and the connecting hole 1211 is connected to the control device 20. The control device 20 can control the pressure in the cylinder body 121 through the connecting hole 1211, so that the piston rod 122 can move up and down relative to the cylinder body 121. In this embodiment, the telescopic member 12 is a telescopic cylinder, and the piston rod 122 is driven by the air pressure in the cylinder body 121. In other embodiments, the telescopic member 12 can also be a hydraulic cylinder or other forms of lifting mechanisms.

[0032] like Figure 7 As shown, the control device 20 includes a programmable controller (PLC) 21, a pressure pump 22 and a pressure relief valve 23, and the pressure pump 22 and the pressure relief valve 23 are connected to the programmable controller 21 and the connecting hole 1211. The programmable controller 21 increases the pressure in the cylinder 121 through the pressure pump 22, so that the piston rod 122 moves upward relative to the cylinder 121, thereby raising the height of the supporting device 10; the programmable controller 21 reduces the pressure in the cylinder 121 through the pressure relief valve 23, so that the piston rod 122 moves downward relative to the cylinder 121, thereby lowering the height of the supporting device 10.

[0033] The programmable controller 21 is connected to the load sensor 111 and the height sensor 124. The load data of the support device 10 collected by the load sensor 111 and the height data of the support device 10 collected by the height sensor 124 are transmitted to the programmable controller 21. The programmable controller 21 contains the tire load-tire radius correspondence, and the corresponding tire radius can be obtained by inputting the tire load, that is, the load sensor 111 inputs the load data, and the corresponding tire radius can be calculated by the tire load-tire radius correspondence. The programmable controller 21 compares the corresponding tire radius with the height data input by the height sensor 124, and then changes the height of the support device 10 through the pressure pump 22 and the pressure relief valve 23.

[0034] In this embodiment, the tire load-tire radius correspondence is a linear equation, and the coordinate system is as follows: Figure 8As shown, the abscissa x represents the tire load (Kg), and the ordinate y represents the tire radius (mm). Figure 8 The tire load-tire radius equation for a certain tire model is y=-0.04x+362.4.

[0035] The programmable controller 21 may include multiple sets of tire load-tire radius equations corresponding to different types of tires. In the vehicle chassis test, the corresponding tire load-tire radius equation may be selected according to actual needs. The programmable controller 21 is also provided with a human-computer interaction module (not shown) for inputting new tire load-tire radius equations and modifying existing tire load-tire radius equations.

[0036] The vehicle operating condition simulation system provided in this embodiment simulates a replacement tire through the support device 10, does not block the suspension during measurement, and can directly measure the suspension data without frequently disassembling and installing the tire. Through the programmable controller 21 with a built-in tire load-tire radius correspondence, the height of the support device 10 can be directly adjusted according to the vehicle load to simulate tires of different radii.

[0037] This embodiment also provides an application method of a vehicle operating condition simulation system, which is applied to the vehicle operating condition simulation system as described above, and includes steps S1 to S3. Step S1 is to connect the automobile hub plate with the flange plate 123, and use the support device 10 to simulate a tire.

[0038] Step S2 includes steps S21 and S22. Step S21 is that the programmable controller 21 collects the load data and height data of the support device 10 through the load sensor 111 and the height sensor 124, and substitutes the load data into the tire load-tire radius correspondence to obtain the corresponding tire radius.

[0039] Step S22 is that the programmable controller 21 compares the corresponding tire radius with the height data input by the height sensor 124. When the height data is less than the corresponding tire radius, the programmable controller 21 increases the pressure in the cylinder 121 through the pressure pump 22, so that the piston rod 122 moves upward relative to the cylinder 121, thereby raising the height of the support device 10 until the height data is equal to the corresponding tire radius. When the height data is greater than the corresponding tire radius, the programmable controller 21 reduces the pressure in the cylinder 121 through the pressure relief valve 23, so that the piston rod 122 moves downward relative to the cylinder 121, thereby lowering the height of the support device 10 until the height data is equal to the corresponding tire radius.

[0040] Step S3 is to record the data of the angle table 13 and the data of the vehicle suspension.

[0041] The vehicle operating condition simulation system and application method provided in this embodiment simulates a replacement tire through the support device 10, which will not block the suspension during measurement, and the suspension data can be directly measured without frequent disassembly and assembly of the tire. Through the programmable controller 21 with a built-in tire load-tire radius correspondence, the height of the support device 10 can be adjusted directly according to the vehicle load to simulate tires of different radii. The telescopic member 12 can swing longitudinally along the base 11, which is different from the traditional fixed tire bracket auxiliary detection and is more in line with actual working conditions. The tire inclination is detected in real time through the angle meter 13, making the chassis posture measurement more convenient, intuitive and accurate.

[0042] In the accompanying drawings, the sizes and relative sizes of layers and regions are exaggerated for clarity. It should be understood that when an element, such as a layer, region, or substrate, is referred to as being "formed on," "disposed on," or "located on" another element, the element may be disposed directly on the other element, or there may be intervening elements. Conversely, when an element is referred to as being "formed directly on" or "disposed directly on" another element, there are no intervening elements.

[0043] In this document, unless otherwise specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore should not be understood as limitations of the present invention.

[0045] In this document, the ordinal adjectives “first”, “second”, etc. used to describe elements are only used to distinguish elements with similar attributes, and do not mean that the elements described in this way must follow a given order, or time, space, level or other limitations.

[0046] As used herein, unless otherwise specified, “plurality” or “several” means two or more.

[0047] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A vehicle operating condition simulation system, characterized in that: It comprises a support device fixedly connected to a car wheel hub to simulate a wheel and a control device connected to the support device to collect height data and load data of the support device and change the height of the support device, the support device comprises a base placed horizontally to measure the load of the support device, a telescopic member whose bottom end is transversely fixed to the base and can swing in a fan shape along the longitudinal direction of the base, and an angle meter indicating the angle between the base and the telescopic member is provided between the base and the telescopic member; The control device comprises a programmable controller, wherein the programmable controller contains a tire load-tire radius correspondence relationship, and the programmable controller is used to collect load data of the support device and substitute the tire load-tire radius correspondence relationship to obtain the tire radius and change the height of the telescopic member with reference to the tire radius; The telescopic member includes a cylinder body connected to the base and controlled by the control device to inflate and deflate, a piston rod driven by the pressure in the cylinder body to move up and down relative to the cylinder body, and a flange plate that fixedly connects the piston rod to the automobile wheel hub; the telescopic member also includes a height sensor for measuring the height of the support device and transmitting the height data to the control device, the height sensor includes a static sliding piece fixed to the cylinder body and a dynamic sliding piece fixed to the piston rod and capable of moving with the piston rod and in sliding contact with the static sliding piece, and the dynamic sliding piece can send different electrical signals to the control device when the relative positions of the dynamic sliding piece and the static sliding piece are different; The cylinder body is connected to the base through a rotating pin, and the cylinder body can swing in a longitudinal fan shape around the central axis of the rotating pin.

2. The vehicle operating condition simulation system according to claim 1, characterized in that: The angle gauge comprises a scale plate fixed on the base and a pointer fixed on the cylinder body and capable of swinging with the cylinder body. Graduations are marked on the scale plate, and the front end of the pointer points to the graduations on the scale plate.

3. The vehicle operating condition simulation system according to claim 1, characterized in that: The base is provided with a load sensor connected to the programmable controller for measuring the load data of the supporting device.

4. The vehicle operating condition simulation system according to claim 1, characterized in that: The control device also includes a pressure pump connected to the programmable controller for adding pressure to the cylinder body and a pressure relief valve for relieving pressure from the cylinder body.

5. An application method of a vehicle operating condition simulation system, applied to the vehicle operating condition simulation system as claimed in any one of claims 1 to 4, characterized in that: The method comprises steps S1 to S3, wherein step S1 is to connect the automobile wheel hub with the telescopic part, and the supporting device simulates the tire; step S2 is for the programmable controller to collect the load data and height data of the supporting device, substitute the load data into the tire load-tire radius correspondence to obtain the corresponding tire radius, and change the height of the telescopic part with reference to the corresponding tire radius; step S3 is to record the data of the angle table and the data of the automobile suspension.

6. The application method of the vehicle operating condition simulation system according to claim 5, characterized in that: The step S2 includes steps S21 to S22, wherein the step S21 is that the programmable controller collects the load data and height data of the supporting device, and substitutes the load data into the tire load-tire radius correspondence to obtain the corresponding tire radius; the step S22 is that the programmable controller compares the height data and the corresponding tire radius, and changes the height of the telescopic member until the height data of the supporting device is equal to the corresponding tire radius.

7. The application method of the vehicle operating condition simulation system according to claim 6, characterized in that: The control device also includes a pressure pump connected to the programmable controller for adding pressure to the cylinder body and a pressure relief valve for relieving pressure from the cylinder body; the step S22 is that the programmable controller compares the height data and the corresponding tire radius, and changes the height of the telescopic member by adding pressure to the cylinder body through the pressure pump or relieving pressure from the cylinder body through the pressure relief valve until the height data of the support device is equal to the corresponding tire radius.

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