Crash Compatibility Bracket with Discontinuous Front Surface
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Solution Overview
Problem
Existing vehicle chassis designs face challenges in providing effective crash compatibility between vehicles of different heights during frontal and offset crashes, leading to inefficiencies in crash energy management and potential hazards to occupant safety due to increased design complexity, weight, and cost.
Innovation Solution
A lightweight and cost-effective system featuring crush horns attached to a frame assembly with cross members and a bracket located near the front-end, which provides a secondary crash management structure with a discontinuous front surface to manage crash energy by aligning with the crash management structures of colliding vehicles, thus compensating for height differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of frontal structures is increased to increase load bearing capacity, then crash energy absorption is improved, but vehicle weight and manufacturing cost increase
Solution Approach 1:
The patent applies local quality by varying the thickness of the bracket in specific regions rather than uniformly increasing thickness throughout. The bracket has a first thickness at the front surface and a second, greater thickness at the rear surface, creating localized reinforcement where crash forces are most intense while maintaining lighter weight in less critical areas.
Solution Approach 2:
The patent employs composite material construction by combining the bracket with the cross member through attachment, creating a composite crash management structure. This allows the bracket to provide localized reinforcement without requiring the entire vehicle structure to be heavier, achieving strength enhancement with minimal weight penalty.
2Strength
If reinforcement members are added to frontal structures to increase load bearing capacity, then crash energy absorption is improved, but design complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the reinforcement function directly into the existing bracket structure rather than adding separate reinforcement members. The bracket itself is designed with variable thickness to provide reinforcement, eliminating the need for additional reinforcement components and reducing overall design complexity.
Solution Approach 2:
The bracket serves multiple functions: it connects the cross member to the frame assembly, provides structural reinforcement during crash events, and manages crash energy through its discontinuous front surface design. This multi-functionality eliminates the need for separate reinforcement members, simplifying the overall design.
3Adaptability or versatility
If bumper height is adjusted to improve crash compatibility between vehicles of different heights, then crash energy management is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent changes the geometric parameters of the bracket, specifically its discontinuous front surface configuration and variable thickness, to achieve crash compatibility. This allows the vehicle to adapt to crashes with vehicles of different heights without physically adjusting the bumper height, maintaining manufacturing simplicity while improving adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively mitigates crash momentum and reduces the risk of injury by distributing crash forces and restraining the crash pulse, enhancing occupant safety without requiring adjustments in bumper height or increasing vehicle weight and complexity.
Implementation Method 1
the bracket can have a discontinuous front surface based on the predetermined criteria for managing the crash energy
Implementation Method 2
The system effectively mitigates crash momentum and reduces the risk of injury by distributing crash forces
Data Source
AI summary
A system for providing crash compatibility between automotive vehicles is disclosed. The system includes crush horns and a bracket located below the longitudinal axis of the crush horns.


