Rear Vehicle-Body Brace Members for Damper Rigidity
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Solution Overview
Problem
Existing rear vehicle-body structures are limited in applicability and deteriorate the utility of the rear baggage room due to their design, which restricts their use across various vehicle types and hinders smooth loading and vibration absorption.
Innovation Solution
A rear vehicle-body structure featuring first and second brace members extending vertically along the vehicle-inside wall face of the wheel house to reinforce the damper support portion, preventing it from falling inwardly and absorbing vibrations without compromising the rear baggage room's utility, and being applicable to a wide range of vehicle types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an upper cross member is used to secure rigidity of the rear vehicle body, then the rigidity of the damper support portion is improved, but the structure is only applicable to sedan type vehicles having a rear parcel and the utility of the rear baggage room is deteriorated
Solution Approach 1:
The reinforcement structure is segmented into multiple components: a pair of reinforcing members extending in the vehicle width direction, and a pair of connecting gussets extending in the vehicle longitudinal direction. This segmentation allows the structure to be adapted to different vehicle types (sedan, hatch-back, SUV) without requiring a complete redesign, thereby improving versatility while maintaining the rigidity enhancement function.
Solution Approach 2:
The reinforcing members and connecting gussets are designed to perform multiple functions: they reinforce the damper support portion to prevent inward collapse, improve torsional rigidity of the rear vehicle body, and can be configured to avoid interfering with rear baggage room utility. This multi-functionality allows the same basic structure to be applied across different vehicle types and configurations.
2Strength
If connecting gussets are arranged to extend longitudinally along side wall portions to improve torsional rigidity, then the torsional rigidity of the vehicle-body rear portion is improved, but smooth loading of baggage into the rear baggage room is hindered
Solution Approach 1:
The connecting gussets are positioned specifically at the upper portions of the rear wheel house portions, connecting the reinforcing members to the vehicle-body rear wall. This localized placement provides torsional reinforcement where structurally necessary while minimizing interference with the rear baggage room space, allowing smooth baggage loading while maintaining rigidity improvement.
3Strength
If reinforcing members and connecting gussets are connected at the upper portions of the rear wheel house portions, then the torsional rigidity is improved, but the structure may be only applicable to hatch-back type vehicles
Solution Approach 1:
The reinforcing members are designed to extend along the rear wheel house portions in the vehicle width direction, and the connecting gussets connect these reinforcing members to the vehicle-body rear wall. This dynamic configuration allows the same basic structure to be adapted to different vehicle types (sedan, hatch-back, SUV) by adjusting the specific positioning and dimensions, thereby improving versatility while maintaining torsional rigidity enhancement.
Data Source
AI summary
In a rear vehicle-body structure of a vehicle in which a damper support portion supporting an upper end portion of a suspension damper is provided at a rear wheel house, on a vehicle-inside wall face of the rear wheel house are provided a first brace member which interconnects a front portion of the damper support portion and a rear side frame and a second brace member which interconnects a rear portion of the damper support portion and the rear side frame. Accordingly, the rigidity of the damper support portion provided at the rear wheel house can be improved easily and effectively, and this structure can have superiority in its applicability.