Dash Upper Reinforcing Member for Front Vehicle Body Collision Rigidity
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Solution Overview
Problem
The existing front vehicle body structures are insufficient in supporting the rear portion of the front side member during collisions, leading to inadequate protection of passengers due to insufficient connection rigidity between the rear portion of the front side member and the dash panel, resulting in deformation and a dipping phenomenon of the vehicle body.
Innovation Solution
A reinforcing structure that includes a dash panel, front side members, and dash upper and cross reinforcing members forming a closed box space, with the dash upper reinforcing member overlapping the inner surface of the dash panel and the dash cross reinforcing member extending in the width direction to enhance connection strength and transverse strength, reducing the push amount towards the passenger room and preventing upward lifting of the rear portion during collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the dash panel is designed with a larger area than thickness to provide sufficient coverage, then the panel coverage area is improved, but the connection rigidity and structural strength deteriorate
Solution Approach 1:
The patent transitions from a two-dimensional panel structure to a three-dimensional box-shaped structure by adding the rear portion reinforcing member that extends in the height direction. This dimensional change creates a closed-box configuration with the dash panel, front side member, and front pillar, significantly enhancing connection rigidity and structural strength while maintaining adequate coverage area.
2Ease of manufacture
If the rear portion of the front side member is coupled to the dash panel with a simple panel structure, then the ease of manufacture is improved, but the structural strength and collision resistance deteriorate
Solution Approach 1:
The reinforcing structure is divided into distinct segments: the dash panel, front side member, front pillar, and rear portion reinforcing member. Each component maintains its functional independence while being connected through standardized coupling interfaces, enabling modular manufacturing and assembly while achieving enhanced structural strength through their integrated box-shaped configuration.
3Weight of moving object
If the dash panel is made thinner to reduce weight, then the weight of the vehicle is reduced, but the ability to support collision impact and prevent deformation deteriorates
Solution Approach 1:
The patent creates a composite structural system by combining the dash panel with the rear portion reinforcing member, front side member, and front pillar to form an integrated box-shaped structure. This composite configuration provides enhanced collision resistance and deformation prevention capabilities while allowing the use of thinner, lighter panel materials, thus reducing overall vehicle weight without compromising strength.
4Strength
If the front side member is pushed to the rear side during collision without sufficient support, then the absorption of collision impact is improved, but the deformation of the dash panel toward the passenger room and the dipping phenomenon worsen
Solution Approach 1:
The rear portion reinforcing member is pre-installed and coupled to the dash panel and front side member before collision occurs, creating a pre-strengthened box-shaped structure. This preliminary reinforcement prevents the dash panel from deforming toward the passenger room and prevents the dipping phenomenon by providing advance structural support that resists collision forces, thereby maintaining vehicle body stability while still allowing controlled impact absorption.
Data Source
AI summary
A front vehicle body reinforcing structure may include a dash panel configured to partition an engine room and a passenger room, front side members deployed at both left and right sides in a width direction of a vehicle, formed to extend in a longitudinal direction of the vehicle, and having rear portions coupled to an outer surface of the dash panel, and a dash upper reinforcing member overlapped with an inner surface of the dash panel to be coupled together with the front side member.