Vehicle Door Reinforcement Layout for Side-Impact Lock Integrity
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Solution Overview
Problem
In motor vehicle doors, side impacts cause deformation of the exterior opening control support, leading to potential unintended door opening, endangering passengers due to interference with the lock, as existing reinforcements fail to adequately distribute forces and prevent harmful interference.
Innovation Solution
The addition of an auxiliary side reinforcement above the main side reinforcement, fixed to the exterior opening control support, helps distribute forces and reduce deformation, preventing door opening during side impacts by providing additional support and controlling bending behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only main side reinforcement and upper reinforcement are used, then the door structure is simpler, but the exterior opening control support deforms during side impact causing harmful interference with the lock
Solution Approach 1:
The side reinforcement is divided into two separate components: a main side reinforcement extending along the lower portion of the door, and an auxiliary side reinforcement extending along the upper portion. This segmentation allows each reinforcement to independently manage deformation in its specific zone, preventing the exterior opening control support from deforming during side impact while maintaining a relatively simple overall structure.
2Reliability
If the exterior opening control support is attached only to the upper reinforcement, then the attachment is simpler, but the control support deforms during side impact causing the door to open inadvertently
Solution Approach 1:
The control support attachment system is designed with differentiated local qualities: the upper reinforcement provides attachment at the top portion of the control support, while the auxiliary side reinforcement provides attachment at the side portion. This local differentiation ensures that each attachment point experiences optimized stress distribution, preventing deformation that would cause inadvertent door opening during side impact.
Data Source
AI summary
The invention relates to a door (3) of a motor vehicle (1), having an outer wall and a lining (7) forming a casing (9), said casing (9) comprising: a main side reinforcement (17) extending longitudinally between a front edge (9A) and a rear edge (9C) of said casing (9); an upper reinforcement (15) extending longitudinally along an upper edge (9B) of said casing (9); an exterior opening control support (11) of the door (3), which is fixed to the upper reinforcement (15); the casing (9) further comprising: an auxiliary side reinforcement (21) which extends above the main side reinforcement (17) longitudinally between the front edge (9A) and the rear edge (9C) of the casing (9) and is fixed to the control support for the exterior opening (11) of the door (3).