Vehicle Body Corner Reinforcement for Variant-Specific Crash Loads
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Solution Overview
Problem
Existing methods for manufacturing motor vehicle bodies with multiple design variants result in unwieldy multi-part constructions that burden lighter variants with unnecessary impact energy absorption measures, compromising compactness and maneuverability, and fail to efficiently utilize available space for tailored impact protection.
Innovation Solution
A method and body design that utilizes common components across variants, with localized reinforcement in the corner region of the front structure to absorb greater impact forces, particularly in heavier variants, by adding additional components to the bulkhead and bulkhead transverse members, optimizing space utilization and impact protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If common body components are used across multiple variants to reduce design effort and cost, then manufacturing efficiency and component standardization are improved, but the ability to meet different impact energy absorption requirements for different weight classes deteriorates
Solution Approach 1:
The patent applies local quality by differentiating only the corner region design between light and heavy variants while keeping all other body components identical. The heavy variant includes additional reinforcement elements (bulkhead transverse members, side sill reinforcements) specifically in the corner regions where impact forces are highest, while light variants use simpler corner designs. This allows each variant to meet its specific impact energy absorption requirements without unnecessary weight penalties from full-body reinforcement.
2Length of moving object
If lighter variants are designed with compact dimensions and minimal dash-to-axle distance for improved maneuverability, then vehicle compactness and handling are improved, but the space available for impact protection structures is reduced
Solution Approach 1:
The patent concentrates impact protection measures specifically in the corner regions rather than distributing them throughout the entire front structure. By placing reinforcement elements strategically in the corner regions where impact forces are most severe, the design achieves adequate impact protection for heavy variants without extending the dash-to-axle distance or compromising the compact dimensions of light variants.
3Strength
If the corner region is designed to absorb greater impact forces for heavier variants, then impact energy absorption capacity is improved, but the complexity of the front structure increases
Solution Approach 1:
The patent segments the front structure into modular components: a common body component set used by all variants, and variant-specific reinforcement elements added only to the corner regions of heavy variants. This segmentation allows the heavy variant to achieve superior impact energy absorption through localized additions rather than redesigning the entire front structure, thereby limiting the increase in overall structural complexity.
4Strength
If additional reinforcement components are added to the corner region of heavier variants, then impact energy absorption is improved, but the weight of the vehicle increases
Solution Approach 1:
The patent minimizes weight increase by concentrating reinforcement measures exclusively in the corner regions rather than reinforcing the entire front structure. The additional bulkhead transverse members, side sill reinforcements, and corner post elements are placed only where impact forces are most severe, allowing heavy variants to achieve necessary impact energy absorption capacity with minimal additional weight compared to light variants.
Data Source
AI summary
A method for producing a body for a motor vehicle, includes providing body components at least of a front structure of a passenger compartment of the motor vehicle which are useable in the manufacturing of a front structure of a passenger compartment of a first variant of the body, to produce the front structure of the passenger compartment of a second variant of the body. The first variant of the body is smaller and more lightweight than the second variant of the body. A corner region of the front structure of the second variant, in which a front wall of the front structure adjoins a front-side end region, belonging to the front structure, of a side sill of the passenger compartment, is designed to absorb a larger force impact than a corresponding corner region of the front structure of the first variant.