Vehicle wheel chamber space design method and design system

Abstract

The invention discloses a vehicle wheel chamber space design method and system, and the method comprises the following steps: building a DMU model, and carrying out the tire envelope manufacturing; manufacturing a grass plate wheel cover metal plate and guard plate data; a wheel cover sample piece is manufactured according to the straw plate wheel cover protection plate designed in the step S2 and metal plate data; carrying out user actual use scene and working condition statistics; performing a real vehicle test based on the use scene and all working conditions counted in the step S4; carrying out data processing on the experimental data, dividing different areas and obtaining an envelope correction value of a relative DMU model tire envelope; a wheel chamber space design boundary is formulated and output; and outputting design data of the wheel cover metal plate and the guard plate, and completing data inspection. According to the method, different working conditions of a user in all scenes are counted, the tire envelope size made by the DMU model is corrected according to a large amount of real vehicle test data, the method is used for early-stage wheel chamber space size design, and wheel chamber space size design is high in accuracy and efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle design, and in particular relates to a vehicle wheel room space design method and a design system. Background Art

[0002] As competition in the automotive industry becomes increasingly fierce, users have higher and higher requirements for vehicle space. Under the condition that the size of the vehicle remains unchanged, obtaining a larger passenger space is particularly important for the competitiveness of automotive products. As one of the factors affecting the passenger space, the wheel room space is compressed to the extreme in the process of platform design in order to obtain a larger passenger space, resulting in many tire wheel cover and sheet metal interference problems during the actual vehicle verification stage, requiring design changes, resulting in a longer development cycle and increased investment costs.

[0003] The existing wheel room space design method is to determine the tire envelope by establishing a suspension DMU model. When establishing the motion model, it is necessary to simplify the elastic elements such as bushings. However, during the actual suspension movement, the motion trajectory constrained by these elastic elements is complex and changeable and cannot be simply simulated, resulting in the motion envelope produced using the simplified DMU motion model being smaller than the actual motion envelope. Considering the accumulation of errors such as manufacturing errors and assembly errors of various related parts and the slight deformation of the rod system parts, it is impossible to accurately reserve the size of the wheel room space, resulting in the problem of large or small reserved space in the design process. If the reserved space is too large, the indoor passenger space will be occupied; if the reserved space is too small, the actual vehicle interference wear problem will occur. Therefore, it is particularly important to study an effective wheel room space design method. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a vehicle wheel room space design method and design system, which corrects the tire envelope size made by the DMU model by counting the different working conditions under all user scenarios and based on a large amount of actual vehicle test data for use in the early stage of wheel room space size design.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] As a first aspect of the present invention, a method for designing a wheelhouse space of a vehicle is provided, comprising the following steps:

[0007] S1. Establish DMU model and make tire envelope;

[0008] S2. Prepare rough wheel cover sheet metal and guard plate data;

[0009] S3. The wheel cover samples are made according to the rough wheel cover guard and sheet metal data designed in step S2;

[0010] S4. Conduct statistics on users’ actual usage scenarios and working conditions;

[0011] S5. Perform vehicle tests based on the usage scenarios and all operating conditions counted in step S4;

[0012] S6. Process the experimental data, divide the data into different areas and obtain the envelope correction value relative to the tire envelope of the DMU model;

[0013] S7. Formulate and output wheel room space design boundaries;

[0014] S8. Output the wheel cover sheet metal and guard plate design data and complete the data check.

[0015] Furthermore, in the step S1, the ETRTO standard tire model is used to produce the tire envelope.

[0016] Furthermore, in step S1, based on the DMU model in CATIA software and according to the tire motion envelope without the snow chain cap diagram, a DMU model tire motion envelope is produced.

[0017] Furthermore, in the step S2, a 20 mm space is reserved on the tire envelope produced in the step S1, and rough wheel arch guard and sheet metal data are designed.

[0018] Furthermore, the step S5 comprises:

[0019] S51. Prepare the test vehicle, install the wheel cover sample, paste plasticine on each area of ​​the wheel cover sample, the plasticine has the same length, and mark each plasticine;

[0020] S52. The vehicle is tested in real vehicle according to the operating conditions of the usage scenarios calculated in step S4, and the test data is recorded;

[0021] S53. After completing each working condition test in turn, subtract the length of the clay at each position before the test from the length after the test to obtain the correction value of the tire envelope at each position under different working conditions.

[0022] Furthermore, the step S6 includes: performing data processing on the experimental data, dividing the wheel room space into a plurality of different areas, and obtaining an envelope correction value of the tire envelope generated in step S1 corresponding to each area.

[0023] Furthermore, step S7 includes: according to the envelope correction value calculated by the area division in step S6, using the tire envelope data produced in step S1, adding the corresponding envelope correction value in each area, and making the boundary under the actual use condition of the tire, that is, the wheel room space design boundary.

[0024] As a second aspect of the present invention, a vehicle wheel room space design is also provided, which is used to implement the vehicle wheel room space design method, comprising:

[0025] Tire motion envelope design module, used to establish DMU model and make DMU model tire envelope;

[0026] The rough version wheel cover sheet metal and guard plate data production module is used to produce rough version wheel cover sheet metal and guard plate data based on the DMU model tire envelope data;

[0027] A wheel cover sample experimental data processing module is used to obtain wheel cover sample experimental data and calculate the correction value of the tire envelope at each position under different working conditions;

[0028] A DMU model tire envelope correction value calculation module is used to divide the wheel room space into a number of different areas and calculate the envelope correction value of the DMU model tire envelope corresponding to each area;

[0029] The wheel room space design boundary formulation and output module is used to formulate the wheel room space design boundary after adding the corresponding envelope correction value to each area included in the DMU model tire.

[0030] The present invention has the following advantages:

[0031] The present invention provides a vehicle wheel room space design method and a design system. During the platform design process, the wheel room space size is designed with high accuracy, and interference wear problems will not occur in real vehicle tests or actual use, thereby improving design quality, improving work efficiency and reducing design change investment; avoiding space waste, minimizing wheel room space occupancy, maximizing vehicle riding space, and improving product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art are briefly introduced below.

[0033] Figure 1 A flow chart of a vehicle wheel room space design method according to Embodiment 1 of the present invention;

[0034] Figure 2 This is the hat diagram described in Example 1 of the present invention;

[0035] Figure 3 The tire envelope diagram produced in Example 1 of the present invention;

[0036] Figure 4 This is a schematic diagram of a grass wheel cover in Example 1 of the present invention;

[0037] Figure 5 This is a schematic diagram of a wheel cover sample with plasticine pasted thereon in Example 1 of the present invention;

[0038] Figure 6This is a schematic diagram of the six areas into which the wheel room space is divided in Example 1 of the present invention. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] This embodiment is a vehicle wheel room space design method, which mainly includes the following steps:

[0042] S1. Establish DMU model and make tire envelope:

[0043] The DMU model is established by using the ETRTO (European Tire and Rim Technical Organization) standard tire model. In this embodiment, the MacPherson front suspension is taken as an example. Based on the CATIA front suspension DMU model, Figure 2 There is no anti-skid chain cap in the figure, make the front wheel DMU model tire motion envelope, such as Figure 3 As shown;

[0044] S2. Prepare rough wheel cover sheet metal and guard plate data:

[0045] Based on the tire envelope produced in step S1, a 20mm space is reserved on the basis of this envelope, and the rough wheel cover guard and sheet metal data are designed, such as Figure 4 As shown;

[0046] S3. The wheel cover samples are made according to the rough wheel cover guard and sheet metal data designed in step S2;

[0047] S4. Conduct statistics on actual user usage scenarios and working conditions, as shown in Table 1;

[0048] Table 1 User usage scenarios and all actual vehicle usage conditions

[0049]

[0050] S5. Perform vehicle tests based on the usage scenarios and all operating conditions counted in step S4:

[0051] S51. Prepare the test vehicle, install the wheel cover sample, and paste plasticine on various areas of the wheel cover sample, such as Figure 5 As shown, the length of the plasticine is 20 mm, and the plasticine at each location is marked;

[0052] S52. The vehicle is tested under the operating conditions required in the usage scenario and the test data is recorded:

[0053] After each working condition test is completed, the length of the plasticine is measured and recorded according to the mark, as shown in Table 2;

[0054] Table 2 Plasticine length data after working condition test

[0055]

[0056]

[0057] S53. After completing each working condition test in turn, the length of the plasticine before the test at each position is subtracted from the length after the test to obtain the correction value of the tire envelope at each position under different working conditions, as shown in Table 3 and Table 4;

[0058] Table 3 Calculation table of correction values ​​for tires at different positions under different working conditions

[0059]

[0060]

[0061] Table 4 Correction values ​​for tires at different positions under different working conditions in this embodiment

[0062]

[0063]

[0064] S6. Process the experimental data, divide them into different areas and obtain the envelope correction value relative to the tire envelope of the DMU model:

[0065] The experimental data is processed, and the wheel room space is divided into 6 different areas according to the rules, and the envelope correction value of the tire envelope produced in step S1 corresponding to each area is obtained, as shown in Table 5;

[0066] Table 5 Envelope correction values ​​corresponding to different areas of the wheel room space in this embodiment

[0067] Serial number Partition Correction value (mm) 1 Area A +15 2 Zone B +10 3 Zone C +10 4 Area D +8 5 Zone E +12 6 F Zone +12

[0068] S7. Wheel room space design boundary formulation and output:

[0069] According to the envelope correction value calculated by the area division in step S6, the tire envelope data prepared in step S1 is used to add the corresponding envelope correction value in each area to make the boundary under the actual use condition of the tire, that is, the wheel room space design boundary;

[0070] S8. Output the wheel cover sheet metal and guard plate design data and complete the data check.

[0071] Example 2

[0072] This embodiment is a vehicle wheel room space design, which is used to implement the vehicle wheel room space design method as described in Embodiment 1, including:

[0073] Tire motion envelope design module, used to establish DMU model and make DMU model tire envelope;

[0074] The rough version wheel cover sheet metal and guard plate data production module is used to produce rough version wheel cover sheet metal and guard plate data based on the DMU model tire envelope data;

[0075] A wheel cover sample experimental data processing module is used to obtain wheel cover sample experimental data and calculate the correction value of the tire envelope at each position under different working conditions;

[0076] A DMU model tire envelope correction value calculation module is used to divide the wheel room space into a number of different areas and calculate the envelope correction value of the DMU model tire envelope corresponding to each area;

[0077] The wheel room space design boundary formulation and output module is used to formulate the wheel room space design boundary after adding corresponding correction values ​​to each area included in the DMU model tire.

[0078] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0079] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0080] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A vehicle wheel room space design method, characterized in that: The following steps are involved: S1. Establish DMU model and make tire envelope; S2. Prepare rough wheel cover sheet metal and guard plate data; S3. The wheel cover samples are made according to the rough wheel cover guard and sheet metal data designed in step S2; S4. Conduct statistics on users’ actual usage scenarios and working conditions; S5. Perform vehicle tests based on the usage scenarios and all operating conditions counted in step S4; S6. Process the experimental data, divide the data into different areas and obtain the envelope correction value relative to the tire envelope of the DMU model; S7. Formulate and output wheel room space design boundaries; S8. Output the wheel cover sheet metal and guard plate design data and complete the data check.

2. A vehicle wheel room space design method as claimed in claim 1, characterized in that: In the step S1, the tire envelope is produced using the ETRTO standard tire model.

3. A vehicle wheel room space design method as claimed in claim 1, characterized in that: In the step S1, based on the DMU model in the CATIA software and according to the tire motion envelope without the snow chain cap, the DMU model is produced.

4. A vehicle wheel room space design method as claimed in claim 1, characterized in that: In step S2, a 20 mm space is reserved on the tire envelope produced in step S1, and rough wheel arch guard and sheet metal data are designed.

5. A vehicle wheel room space design method as claimed in claim 1, characterized in that: The step S5 comprises: S51. Prepare the test vehicle, install the wheel cover sample, paste plasticine on each area of ​​the wheel cover sample, the plasticine has the same length, and mark each plasticine; S52. The vehicle is tested in real vehicle according to the operating conditions of the usage scenarios calculated in step S4, and the test data is recorded; S53. After completing each working condition test in turn, subtract the length of the clay at each position before the test from the length after the test to obtain the correction value of the tire envelope at each position under different working conditions.

6. A vehicle wheel room space design method as claimed in claim 1, characterized in that: The step S6 includes: performing data processing on the experimental data, dividing the wheel room space into a plurality of different areas, and obtaining an envelope correction value of the tire envelope generated in step S1 corresponding to each area.

7. A vehicle wheel room space design method as claimed in claim 1, characterized in that: The step S7 comprises: according to the envelope correction value calculated by the area division in step S6, using the tire envelope data produced in step S1, adding the corresponding envelope correction value in each area, and making the boundary under the actual use condition of the tire, that is, the wheel room space design boundary.

8. A vehicle wheel room space design, used to implement the vehicle wheel room space design method as claimed in any one of claims 1 to 7, characterized in that: include: Tire motion envelope design module, used to establish DMU model and make DMU model tire envelope; The rough version wheel cover sheet metal and guard plate data production module is used to produce rough version wheel cover sheet metal and guard plate data based on the DMU model tire envelope data; A wheel cover sample experimental data processing module is used to obtain wheel cover sample experimental data and calculate the correction value of the tire envelope at each position under different working conditions; A DMU model tire envelope correction value calculation module is used to divide the wheel room space into a number of different areas and calculate the envelope correction value of the DMU model tire envelope corresponding to each area; The wheel room space design boundary formulation and output module is used to formulate the wheel room space design boundary after adding the corresponding envelope correction value to each area included in the DMU model tire.

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