A parametric design method and system for the main section of a complete vehicle

Abstract

The present application relates to a parametric design method and system for the main section of a whole vehicle, which includes: obtaining tire envelope information and presetting the Y-direction wheel brow gap value; calculating the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel brow gap value; judging whether the difference between the vehicle width value at the wheel center and the preset vehicle width target value is within the error range, if it is within the error range, completing the hard point section HP01 drawing, if it is not within the error range, adjusting the preset parameters, and calculating the vehicle width value at the wheel center again, the preset parameters include the preset Y-direction wheel brow gap value. In the preliminary research stage of the project, the present invention calculates the vehicle width value at the wheel center, and judges whether the vehicle width at the wheel center meets the preset vehicle width target value to identify risks and determine the rationality of the data set in the early stage of the project; through the obtained tire envelope information, the modeling is included in the early consideration range, and the design direction of the modeling is considered while solving the engineering problem, effectively promoting the simultaneous progress of engineering and modeling.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a parametric design method and system for the main section of a whole vehicle. Background Art

[0002] Automobile design begins with the definition of hard points and parameters. The main section of the vehicle is an important means to verify whether these definitions are valid. The main section reflects the hard points and structural status of the key parts of the car. It is input into the styling and three major (body / chassis / electrical) disciplines in the early stage of design. It can be used to constrain styling and engineering design, and can realize the feasibility analysis and verification of the main structure of the vehicle body, and runs through the entire process from renderings to the release of production-standard data.

[0003] When the existing scheme sets and provides the approximate vehicle size ratio in the early stage of the project, it is not verified whether the vehicle width at the wheel center can meet the target value setting. Adjustments made after specific analysis in the later stage will lead to an extension of the entire project cycle or a shortening of the engineering development cycle. Therefore, in the process of developing based on the vehicle platform, under the premise of universal chassis architecture data, there may be contradictions between the vehicle width at the wheel center and the wheel arch clearance, which will cause conflicts in the styling design and engineering definition in the later stage of the project. Summary of the invention

[0004] The embodiment of the present application provides a parametric design method and system for the main section of a whole vehicle, so as to solve the problem in the related art that the vehicle width at the wheel center in the early stage of the project is not verified to meet the target value setting, which causes conflicts between the styling design and engineering definition in the later stage of the project.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: In the first aspect, a parametric design method for the main section of a whole vehicle is provided, which includes: obtaining tire envelope information and presetting a Y-direction wheel arch clearance value; calculating a vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel arch clearance value; judging whether the difference between the vehicle width value at the wheel center and a preset vehicle width target value is within an error range, if within the error range, completing the drawing of the hard point section HP01, if not within the error range, adjusting the preset parameters, and calculating the vehicle width value at the wheel center again, wherein the preset parameters include a preset Y-direction wheel arch clearance value.

[0006] In some embodiments, when the preset Y-direction wheel eyebrow clearance value is adjusted within the preset Y-direction wheel eyebrow clearance value value range, the difference between the vehicle width value at the wheel center and the preset vehicle width target value is not within the error range; the preset parameters also include the preset vehicle width target value;

[0007] The method further includes: restoring a preset Y-direction wheel brow gap value to an initial value; adjusting a preset vehicle width target value; determining whether a difference between a vehicle width value at a wheel center and an adjusted preset vehicle width target value is within an error range; if within the error range, completing the drawing of a hard point section HP01; if not within the error range, adjusting the preset Y-direction wheel brow gap value again, and returning to the step of calculating a vehicle width value at a wheel center based on tire envelope information and the preset Y-direction wheel brow gap value.

[0008] In some embodiments, the tire envelope information is obtained, and the specific steps include: setting pre-concept data of the target vehicle body; setting basic parameter data; and obtaining the tire envelope information using the pre-concept data and basic parameter data of the target vehicle body.

[0009] In some embodiments, the pre-conceptual data of the target vehicle body includes dimension positioning data and product model data.

[0010] In some embodiments, the basic parameter data includes chassis architecture data.

[0011] In some embodiments, the preset Y-direction wheel arch clearance value ranges from 10 mm to 20 mm.

[0012] In a second aspect, a parametric design system for the main section of a whole vehicle is provided, which includes: a first module, a second module and a third module, the first module is used to obtain tire envelope information and preset a Y-direction wheel arch gap value; the second module is used to calculate the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel arch gap value; the third module is used to determine whether the vehicle width value at the wheel center meets the preset vehicle width target value, if so, the hard point section HP01 drawing is completed, if not, the preset parameters are adjusted until the vehicle width value at the wheel center meets the preset vehicle width target value and the hard point section HP01 drawing is completed.

[0013] In some embodiments, when the preset Y-direction wheel eyebrow clearance value is adjusted within the preset Y-direction wheel eyebrow clearance value value range, the difference between the vehicle width value at the wheel center and the preset vehicle width target value is not within the error range; the preset parameters also include the preset vehicle width target value;

[0014] The third module is also used for: restoring the preset Y-direction wheel eyebrow clearance value to the initial value; adjusting the preset vehicle width target value; judging whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within the error range; if it is within the error range, completing the hard point section HP01 drawing; if it is not within the error range, adjusting the preset Y-direction wheel eyebrow clearance value again, and returning to the step of calculating the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel eyebrow clearance value.

[0015] In some embodiments, the first module is specifically used to: set pre-concept data of the target vehicle body; set basic parameter data; and obtain tire envelope information using the pre-concept data and basic parameter data of the target vehicle body.

[0016] In some embodiments, the pre-conceptual data of the target vehicle body includes dimension positioning data and product model data; and the basic parameter data includes chassis architecture data.

[0017] The beneficial effects of the technical solution provided by this application include:

[0018] The embodiment of the present application provides a parametric design method and system for the main section of a whole vehicle. In the early stage of the project, the vehicle width at the wheel center is calculated, and it is determined whether the vehicle width at the wheel center meets the preset vehicle width target value to identify risks and determine the rationality of the early stage setting data of the project. By obtaining the tire envelope information, the styling is included in the early stage consideration scope, and the design direction of the styling is considered while solving the engineering problems, which effectively promotes the simultaneous progress of engineering and styling, avoids the conflict between the later styling and engineering, and enables the project to be carried out smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the wheel camber angle provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of a hard point section HP01 provided in an embodiment of the present application;

[0022] Figure 3 A flow chart for calculating the vehicle width at the wheel center provided in an embodiment of the present application;

[0023] Figure 4 Flowchart of the parametric design method of the main section of the whole vehicle provided in the embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] The embodiment of the present application provides a method and system for parametric design of the main section of a whole vehicle, which can solve the problem in the related art that the vehicle width at the wheel center in the early stage of the project is not verified to meet the target value setting, which causes conflicts between the styling design and engineering definition in the later stage of the project.

[0026] In a first aspect, an embodiment of the present application provides a method for parametric design of a main section of a vehicle, which comprises the following steps:

[0027] S100: Obtain tire envelope information and preset a Y-direction wheel eyebrow clearance value;

[0028] S200: Calculating the vehicle width at the wheel center based on the tire envelope information and a preset Y-direction wheel arch clearance value;

[0029] S300: Determine whether the difference between the vehicle width value at the wheel center and the preset vehicle width target value is within an error range. If so, complete the drawing of the hard point section HP01. If not, adjust the preset parameters and calculate the vehicle width value at the wheel center again. The preset parameters include a preset Y-direction wheel arch clearance value.

[0030] Specifically, in this embodiment, before drawing the hard point section, the traditional automobile design does not verify whether the vehicle width at the wheel center can meet the target value setting. Adjustment after specific analysis in the later stage will lead to an extension of the entire project cycle or a shortening of the engineering development cycle. In the process of vehicle platform development, under the premise of common chassis architecture data, there may be contradictions between the vehicle width at the wheel center and the wheel eyebrow gap, which involves the combination of styling design and engineering definition, and conflicts will occur in the styling design and engineering definition in the later stage of the project.

[0031] Therefore, in order to solve the above problems, the present invention first obtains the tire envelope information and presets the Y-direction wheel brow gap value; then calculates the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel brow gap value; finally, determines whether the difference between the vehicle width value at the wheel center and the preset vehicle width target value is within the error range. If it is within the error range, the hard point section HP01 drawing is completed; if it is not within the error range, the preset parameters are adjusted and the vehicle width value at the wheel center is calculated again, wherein the preset parameters include the preset Y-direction wheel brow gap value. Therefore, in the early stage of the project, the present invention calculates the vehicle width value at the wheel center, and determines whether the vehicle width at the wheel center meets the preset vehicle width target value to identify risks and determine the rationality of the early stage setting data of the project; through the obtained tire envelope information, the modeling is included in the early stage consideration scope, and the design direction of the modeling is considered while solving the engineering problem, which effectively promotes the simultaneous progress of engineering and modeling, avoids the conflict between the later modeling and engineering, and enables the project to be carried out smoothly.

[0032] It should be noted that "tire envelope" refers to the space occupied by the wheels when they bounce up and down and turn to the extreme position under various driving conditions. The main purpose of obtaining tire envelope information is to obtain the tire envelope surface. The tire envelope surface determines the shape of the wheel cover and fender, and can check the motion interference between the wheel and the surrounding subsystems, while affecting the design changes of the subsystems.

[0033] In this embodiment, the styling professionals provide the trend line of the styling (car shape / exterior design) at the wheel guard position or the competing models that are closely related to the styling direction, which provides a reference for the preset Y-direction wheel eyebrow clearance value of this application. The preset Y-direction wheel eyebrow clearance value ranges from 10mm to 20mm. Preferably, the preset Y-direction wheel eyebrow clearance value is 15mm. This is because if the preset Y-direction wheel eyebrow clearance value is too small, it will limit the later styling design; if the preset Y-direction wheel eyebrow clearance value is too large, only ensuring the Y-direction wheel eyebrow clearance at the wheel center will result in failure to meet the target definition of the vehicle width. For example, in the early pre-research stage of a project, in order to meet the vehicle width requirements, the preset Y-direction fender clearance value of the front wheel is set to 9mm. Combined with the regulatory requirements of "GB7063 Automobile Wheel Guard" (the tire must be covered by the wheel guard in the plane 30° in front of and 50° behind the wheel center), the Y-direction fender clearance at 50° behind the tire needs to be ≥7mm considering the tolerance, which leaves only 2mm for the design of the shape. Therefore, the preset Y-direction fender clearance value is too small, which limits the later styling design.

[0034] After investigating the preset Y-direction fender gap values ​​and inward amounts of some models on the market (see Table 1), it was found that the early preset Y-direction fender gap values ​​were too small, which greatly restricted the styling.

[0035] Table 1: Y-direction wheel arch clearance and inset of some models on the market

[0036] Model ES8 Ideal one ID.6X X7 Touron 0° position (mm) 18.5 23.1 12.5 12.6 11.2 50° position (mm) 10.7 15.9 7.2 5.9 5 Adduction amount (0°-50°) 7.8 7.2 5.3 6.7 6.2

[0037] Preferably, in the embodiment of the present application, in the “S100: obtaining tire envelope information”, the specific steps include:

[0038] S110: setting preliminary concept data of the target vehicle body;

[0039] S120: Setting basic parameter data;

[0040] S130: Acquire tire envelope information using pre-conceptual data and basic parameter data of the target vehicle body.

[0041] Specifically, in this embodiment, during the process of verifying the width value of the vehicle at the wheel center, the product planning personnel need to set the pre-conceptual data of the target vehicle body, wherein the pre-conceptual data of the target vehicle body includes the size positioning data and the product model data; the platform architecture personnel set the basic parameter data, wherein the basic parameter data includes the chassis architecture data; when the pre-conceptual data and basic parameter data of the target vehicle body are set, the chassis professionals obtain the tire envelope information according to the product model and chassis architecture data and complete the production of the tire envelope. It should be noted that in this embodiment, the specific relevant dimensions of the tire are obtained by looking up the table according to GB / T 2978 Passenger Car Tire Specifications, Dimensions, Air Pressure and Load.

[0042] According to the calculation formula of the vehicle width at the wheel center:

[0043]

[0044] Where N represents the brake disc distance, which is set according to the chassis structure data of different models;

[0045] ET stands for wheel rim offset (the distance between the contact surface and the wheel centerline). There are positive offset, zero offset and negative offset. Positive offset means that the wheel hub is offset outward from the wheel centerline to reach the contact surface. Wheel hubs with positive offset are commonly found in front-wheel drive and some rear-wheel drive models. Zero offset means that the wheel hub and the contact surface are located at the wheel centerline. Negative offset means that the wheel hub is offset inward from the wheel centerline to reach the contact surface. Wheel hubs with negative offset are commonly found in SUV models. Under the same architecture platform, the smaller the ET value, the larger the wheel center distance between two coaxial wheels. The contact surface refers to the surface of the screws on the wheel (fastening surface).

[0046] D represents the static radius under actual load. The static radius refers to the vertical distance from the axle center to the ground under the static vertical load of the wheel. The static radius is calculated based on the tire selection, tire stiffness and axle load. It should be noted that the tire stiffness curves of the same model from different manufacturers are different.

[0047] α represents the wheel camber angle, which refers to the inward or outward inclination of the actual center line of the wheel relative to the longitudinal vertical plane. If the wheel is tilted outward, the camber angle is positive, and if the wheel is tilted inward, the camber angle is negative. The wheel camber angle of a family car is generally positive. The specific judgment method is as follows: Figure 1 As shown, Figure 1 In the figure, X is the vertical reference line and Y is the wheel plane;

[0048] B indicates the tire width in the free state. The tire width can be confirmed according to the tire selection. When confirming the tire width, refer to "GB / T2978 Passenger Car Tire Specifications, Dimensions, Air Pressure and Load". If there is no "GB / T2978 Passenger Car Tire Specifications, Dimensions, Air Pressure and Load" standard, a preliminary judgment can be made based on the tire model. The tire specifications are usually represented by a group of numbers. The first number represents the tire section width in mm, and the second number represents the rim diameter in inches. For example, 165 / 70R14 means a radial tire with a tire width of 165mm, an aspect ratio of 70, and a rim diameter of 14 inches.

[0049] Y represents the preset Y-direction fender gap value. In the vehicle model pre-research stage, the preset Y-direction fender gap value is generally set to 15mm. The preset Y-direction fender gap value can be freely used under the premise of meeting the "GB7063-2011 Automobile Wheel Guard" regulations. Generally, the preset Y-direction fender gap value is in the range of 10mm to 20mm.

[0050] According to the above formula, in this embodiment, the chassis structure data includes but is not limited to the brake disc distance; the size positioning data includes but is not limited to the rim offset distance, static radius, and wheel camber angle; the product model data includes but is not limited to the tire width in the free state.

[0051] The vehicle width at the wheel center is calculated by a formula. After the calculation, it is determined whether the difference between the vehicle width at the wheel center and the preset vehicle width target value is within the error range. Determining whether the difference between the vehicle width at the wheel center and the preset vehicle width target value is within the error range means: comparing the calculated vehicle width at the wheel center with the vehicle width target value. When the difference between the vehicle width at the wheel center and the vehicle width target value is less than or equal to 0, it indicates that the difference is within the error range; when the difference between the vehicle width at the wheel center and the vehicle width target value is greater than 0, it indicates that the difference is not within the error range.

[0052] If it is within the error range, the hard point section HP01 drawing is completed. The specific form of the hard point section HP01 is as follows: Figure 2 As shown, Figure 2 The Z in the middle represents the preset vehicle width target value.

[0053] The hard point section HP01 shall reflect the following contents:

[0054]

[0055] Table 2: Contents to be reflected in the hard point section HP01

[0056] It should be noted that the contents in Table 2 may differ due to different configurations, and therefore need to be adjusted accordingly in different embodiments.

[0057] If it is not within the error range, the preset parameters are adjusted. When the difference between the vehicle width at the wheel center and the preset vehicle width target value is not within the error range, there are different ways to adjust the preset parameters:

[0058] In some possible embodiments, the preset parameters include a preset Y-direction wheel arch clearance value. If the difference between the vehicle width value at the wheel center and the preset vehicle width target value is not within an error range, the preset Y-direction wheel arch clearance value is adjusted and the vehicle width value at the wheel center is calculated again.

[0059] Specifically, in this embodiment, when the difference between the vehicle width value at the wheel center and the preset vehicle width target value is greater than 0, the chassis structure data and the tire envelope information are not adjusted, and the styling designer is communicated with to compensate by adjusting the preset Y-direction wheel eyebrow gap value. When the preset Y-direction wheel eyebrow gap value is adjusted, within the value range of the preset Y-direction wheel eyebrow gap value, the preset Y-direction wheel eyebrow gap value must also meet the regulatory requirements of "GB7063-2011 Automobile Wheel Guard" and styling design requirements, wherein the styling design requirements include but are not limited to the motion clearance requirements of the tire envelope and the tire periphery. When the preset Y-direction wheel eyebrow gap value is within the value range and meets the regulatory requirements of "GB7063-2011 Automobile Wheel Guard" and styling design requirements, the vehicle width value at the wheel center is calculated again according to the formula:

[0060]

[0061] Calculate the vehicle width at the wheel center after adjusting the preset Y-direction wheel eyebrow clearance value. Then compare the vehicle width at the wheel center with the preset vehicle width target value again. If the difference is within the error range, the hard point section HP01 drawing is completed. If it is not within the error range, the adjusted preset Y-direction wheel eyebrow clearance value is within the value range of the preset Y-direction wheel eyebrow clearance value and also meets the regulatory requirements of "GB7063-2011 Automobile Wheel Guard" and the design requirements, repeat the above steps until the difference is within the error range and the hard point section HP01 drawing is completed.

[0062] In some other possible embodiments, when the difference between the vehicle width value at the wheel center and the preset vehicle width target value is not within the error range after the preset Y-direction wheel eyebrow clearance value is adjusted within the value range of the preset Y-direction wheel eyebrow clearance value, the preset parameters further include the preset vehicle width target value;

[0063] The parametric design method for the main section of the whole vehicle also includes: restoring the preset Y-direction wheel eyebrow gap value to an initial value; adjusting the preset vehicle width target value; judging whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within an error range; if it is within the error range, completing the drawing of the hard point section HP01; if it is not within the error range, adjusting the preset Y-direction wheel eyebrow gap value again, and returning to the step of calculating the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel eyebrow gap value.

[0064] Specifically, when the preset Y-direction wheel eyebrow gap value is adjusted within the value range of the preset Y-direction wheel eyebrow gap value, and the adjusted preset Y-direction wheel eyebrow gap value meets the regulatory requirements of "GB7063-2011 Automobile Wheel Guard" and the styling design requirements, the difference between the calculated vehicle width value at the wheel center and the preset vehicle width target value is still not within the error range, and the preset vehicle width target value needs to be adjusted.

[0065] At this time, since the preset Y-direction wheel eyebrow clearance value has been adjusted for many times, the preset Y-direction wheel eyebrow clearance value needs to be restored to the initial value. For example, when the vehicle width value at the wheel center is calculated for the first time, the preset Y-direction wheel eyebrow clearance value is 15 mm. At this time, the preset Y-direction wheel eyebrow clearance value is still 15 mm and remains unchanged. Then, the preset vehicle width target value is adjusted, and it is determined whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within the error range. If it is within the error range, the hard point section HP01 drawing can be completed. If it is not within the error range, first consider adjusting the preset Y-direction wheel eyebrow clearance value. At this time, the adjusted preset Y-direction wheel eyebrow clearance value is within the value range of the preset Y-direction wheel eyebrow clearance value and also meets the regulatory requirements and styling design requirements of "GB7063-2011 Automobile Wheel Guard", and the adjusted preset Y-direction wheel eyebrow clearance value is used to calculate the vehicle width value at the wheel center again, and it is determined whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within the error range. If the difference is not within the error range, repeat the above operation until the difference is within the error range, and the drawing of the hard point section HP01 is completed.

[0066] In summary, in the preliminary research stage of the project, this application calculates the vehicle width at the wheel center, and determines whether the vehicle width at the wheel center meets the preset vehicle width target value to identify risks and determine the rationality of the data set in the early stage of the project; through the obtained tire envelope information, the styling is included in the early consideration scope, and the design direction of the styling is considered while solving engineering problems, which effectively promotes the simultaneous progress of engineering and styling, avoids conflicts between styling and engineering in the later stage, and enables the project to be carried out smoothly.

[0067] In the second aspect, an embodiment of the present application provides a parametric design system for the main section of a whole vehicle, which includes: a first module, a second module and a third module, the first module is used to obtain tire envelope information and preset the Y-direction wheel arch gap value; the second module is used to calculate the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel arch gap value; the third module is used to determine whether the vehicle width value at the wheel center meets the preset vehicle width target value. If so, the hard point section HP01 drawing is completed; if not, the preset parameters are adjusted until the vehicle width value at the wheel center meets the preset vehicle width target value and the hard point section HP01 drawing is completed.

[0068] In this application, in the early stage of the project, the vehicle width at the wheel center is calculated, and it is determined whether the vehicle width at the wheel center meets the preset vehicle width target value to identify risks and determine the rationality of the data set in the early stage of the project; by obtaining the tire envelope information, the styling is included in the early consideration scope, and the design direction of the styling is considered while solving engineering problems, which effectively promotes the simultaneous progress of engineering and styling, avoids conflicts between styling and engineering in the later stage, and enables the project to proceed smoothly.

[0069] Among them, the first module is specifically used for: setting the pre-concept data of the target vehicle body; setting the basic parameter data; using the pre-concept data and basic parameter data of the target vehicle body to obtain the tire envelope information. In this embodiment, in the process of verifying the vehicle width value at the wheel center, the product planner needs to set the pre-concept data of the target vehicle body, wherein the pre-concept data of the target vehicle body includes the size positioning data and the product model data; the platform architecture personnel set the basic parameter data, wherein the basic parameter data includes the chassis architecture data; when the pre-concept data and basic parameter data of the target vehicle body are set, the chassis professionals obtain the tire envelope information according to the product model and chassis architecture data and complete the production of the tire envelope. It should be noted that in this embodiment, the specific relevant dimensions of the tire are obtained by looking up the table according to "GB / T2978 Passenger Car Tire Specifications, Dimensions, Air Pressure and Load".

[0070] The vehicle width at the wheel center is calculated by the formula. After the calculation, it is determined whether the difference between the vehicle width at the wheel center and the preset vehicle width target value is within the error range. To determine whether the difference between the vehicle width at the wheel center and the preset vehicle width target value is within the error range means: comparing the calculated vehicle width at the wheel center with the vehicle width target value. When the difference between the vehicle width at the wheel center and the vehicle width target value is less than or equal to 0, it indicates that the difference is within the error range; when the difference between the vehicle width at the wheel center and the vehicle width target value is greater than 0, it indicates that the difference is not within the error range. If it is within the error range, the hard point section HP01 drawing is completed;

[0071] If it is not within the error range, the preset parameters are adjusted. When the difference between the vehicle width at the wheel center and the preset vehicle width target value is not within the error range, there are different ways to adjust the preset parameters:

[0072] In some possible embodiments, the preset parameters include a preset Y-direction wheel arch clearance value. If the difference between the vehicle width value at the wheel center and the preset vehicle width target value is not within an error range, the preset Y-direction wheel arch clearance value is adjusted and the vehicle width value at the wheel center is calculated again.

[0073] Specifically, in this embodiment, when the difference between the vehicle width value at the wheel center and the preset vehicle width target value is greater than 0, the tire envelope information is not adjusted and the styling designer is communicated with to compensate by adjusting the preset Y-direction wheel eyebrow gap value. When the preset Y-direction wheel eyebrow gap value is adjusted, within the value range of the preset Y-direction wheel eyebrow gap value, the preset Y-direction wheel eyebrow gap value must also meet the regulatory requirements of "GB7063-2011 Automobile Wheel Guard" and styling design requirements, wherein the styling design requirements include but are not limited to the motion clearance requirements of the tire envelope and the tire periphery. When the preset Y-direction wheel eyebrow gap value is within the value range and meets the regulatory requirements of "GB7063-2011 Automobile Wheel Guard" and styling design requirements, the vehicle width value at the wheel center is calculated again according to the formula:

[0074]

[0075] Calculate the vehicle width at the wheel center after adjusting the preset Y-direction wheel eyebrow clearance value. Then compare the vehicle width at the wheel center with the preset vehicle width target value again. If the difference is within the error range, the hard point section HP01 drawing is completed. If it is not within the error range, the adjusted preset Y-direction wheel eyebrow clearance value is within the value range of the preset Y-direction wheel eyebrow clearance value and also meets the regulatory requirements of "GB7063-2011 Automobile Wheel Guard" and the design requirements, repeat the above steps until the difference is within the error range and the hard point section HP01 drawing is completed.

[0076] In some other possible embodiments, when the difference between the vehicle width value at the wheel center and the preset vehicle width target value is not within the error range after the preset Y-direction wheel eyebrow clearance value is adjusted within the value range of the preset Y-direction wheel eyebrow clearance value, the preset parameters further include the preset vehicle width target value;

[0077] In this embodiment, the third module is also used to: restore the preset Y-direction wheel arch clearance value to the initial value; adjust the preset vehicle width target value; determine whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within the error range; if it is within the error range, complete the hard point section HP01 drawing; if it is not within the error range, adjust the preset Y-direction wheel arch clearance value again, and return to the step of calculating the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel arch clearance value.

[0078] Specifically, when the preset Y-direction wheel eyebrow gap value is adjusted within the value range of the preset Y-direction wheel eyebrow gap value, and the adjusted preset Y-direction wheel eyebrow gap value meets the regulatory requirements of "GB7063-2011 Automobile Wheel Guard" and the styling design requirements, the difference between the calculated vehicle width value at the wheel center and the preset vehicle width target value is still not within the error range, and the preset vehicle width target value needs to be adjusted.

[0079] At this time, since the preset Y-direction wheel eyebrow clearance value has been adjusted for many times, the preset Y-direction wheel eyebrow clearance value needs to be restored to the initial value. For example, when the vehicle width value at the wheel center is calculated for the first time, the preset Y-direction wheel eyebrow clearance value is 15 mm. At this time, the preset Y-direction wheel eyebrow clearance value is still 15 mm and remains unchanged. Then, the preset vehicle width target value is adjusted, and it is determined whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within the error range. If it is within the error range, the hard point section HP01 drawing can be completed. If it is not within the error range, first consider adjusting the preset Y-direction wheel eyebrow clearance value. At this time, the adjusted preset Y-direction wheel eyebrow clearance value is within the value range of the preset Y-direction wheel eyebrow clearance value and also meets the regulatory requirements and styling design requirements of "GB7063-2011 Automobile Wheel Guard", and the adjusted preset Y-direction wheel eyebrow clearance value is used to calculate the vehicle width value at the wheel center again, and it is determined whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within the error range. If the difference is not within the error range, repeat the above operation until the difference is within the error range, and the drawing of the hard point section HP01 is completed.

[0080] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0081] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0082] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A parametric design method for the main section of a vehicle, characterized in that: It includes: Get tire envelope information and preset the Y-direction wheel eyebrow clearance value; Calculate the vehicle width at the wheel center based on the tire envelope information and the preset Y-direction wheel arch clearance value; It is determined whether the difference between the vehicle width value at the wheel center and the preset vehicle width target value is within the error range. If it is within the error range, the hard point section HP01 drawing is completed. If it is not within the error range, the preset parameters are adjusted and the vehicle width value at the wheel center is calculated again. The preset parameters include the preset Y-direction wheel eyebrow clearance value.

2. The parametric design method for the main section of a vehicle according to claim 1, characterized in that: When the preset Y-direction wheel eyebrow clearance value is adjusted within the preset Y-direction wheel eyebrow clearance value value range, the difference between the vehicle width value at the wheel center and the preset vehicle width target value is not within the error range; The preset parameters also include a preset vehicle width target value; The method further comprises: Restore the preset Y-axis wheel eyebrow clearance value to the initial value; Adjust the preset vehicle width target value; Determine whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within an error range; If it is within the error range, the hard point section HP01 drawing is completed; If it is not within the error range, the preset Y-direction wheel arch clearance value is adjusted again, and the process returns to the step of calculating the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel arch clearance value.

3. The parametric design method for the main section of a vehicle according to claim 1, characterized in that: Obtain tire envelope information. The specific steps include: Set pre-concept data of target vehicle body; Set basic parameter data; The tire envelope information is obtained using the pre-concept data and basic parameter data of the target vehicle body.

4. The parametric design method for the main section of a vehicle as claimed in claim 3, characterized in that: The pre-conceptual data of the target vehicle body includes dimension positioning data and product model data.

5. The parametric design method for the main section of a vehicle as claimed in claim 3, characterized in that: The basic parameter data includes chassis architecture data.

6. The parametric design method for the main section of a vehicle according to claim 1, characterized in that: The preset Y-direction wheel arch clearance value ranges from 10 mm to 20 mm.

7. A parametric design system for the main section of a vehicle, characterized in that: It includes: The first module is used to obtain tire envelope information and preset the Y-direction wheel eyebrow clearance value; The second module is used to calculate the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel eyebrow gap value; The third module is used to determine whether the vehicle width value at the wheel center meets the preset vehicle width target value. If so, the hard point section HP01 drawing is completed. If not, the preset parameters are adjusted until the vehicle width value at the wheel center meets the preset vehicle width target value and the hard point section HP01 drawing is completed.

8. The vehicle main section parametric design system according to claim 7, characterized in that: When the preset Y-direction wheel eyebrow clearance value is adjusted within the preset Y-direction wheel eyebrow clearance value value range, the difference between the vehicle width value at the wheel center and the preset vehicle width target value is not within the error range; The preset parameters also include a preset vehicle width target value; The third module is also used for: Restore the preset Y-axis wheel eyebrow clearance value to the initial value; Adjust the preset vehicle width target value; Determine whether the difference between the vehicle width value at the wheel center and the adjusted preset vehicle width target value is within an error range; If it is within the error range, the hard point section HP01 drawing is completed; If it is not within the error range, the preset Y-direction wheel arch clearance value is adjusted again, and the process returns to the step of calculating the vehicle width value at the wheel center based on the tire envelope information and the preset Y-direction wheel arch clearance value.

9. The vehicle main section parametric design system according to claim 8, characterized in that: The first module is specifically used for: Set pre-concept data of target vehicle body; Set basic parameter data; The tire envelope information is obtained using the pre-concept data and basic parameter data of the target vehicle body.

10. The vehicle main section parametric design system according to claim 9, characterized in that: The pre-conceptual data of the target vehicle body includes dimension positioning data and product model data; The basic parameter data includes chassis architecture data.

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