Side Sill Reinforcement for B-Pillarless Sliding-Door Stiffness
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Solution Overview
Problem
The removal of the B-pillar and the formation of a hole for the rail part in the side sill of vehicles with double-door-type sliding doors can lead to a reduction in lateral stiffness of the vehicle body, compromising collision performance and NVH (Noise, Vibration, and Harshness) performance.
Innovation Solution
A reinforcing material is connected to the side sill, specifically a rail reinforcement is positioned at the entry hole to block the rail unit and is connected to crossmembers to enhance the stiffness of the side sill, thereby improving the vehicle's collision and NVH performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If double-door-type sliding doors are applied with removed B-pillar and rail part entry hole in side sill, then passenger convenience and wide entrance are improved, but lateral stiffness of vehicle body is reduced
Solution Approach 1:
The patent applies local quality by adding reinforcing materials specifically at the side sill entry holes and B-pillar removal areas where stiffness is compromised. The reinforcing members are strategically positioned only at the weakened locations rather than throughout the entire vehicle body, providing localized strength enhancement while preserving the overall sliding door design benefits.
Solution Approach 2:
The patent employs composite materials by combining the vehicle body's original structure with additional reinforcing materials. The reinforcing members are integrated with the existing side sills and body structure to create a composite system that maintains both the sliding door functionality and the required lateral stiffness for collision performance.
2Adaptability or versatility
If B-pillar is removed and hole is formed for rail part entry, then sliding door function is enabled, but collision performance is compromised
Solution Approach 1:
The patent applies local quality by adding reinforcing materials specifically at the side sill entry holes and B-pillar removal areas where stiffness is compromised. The reinforcing members are strategically positioned only at the weakened locations rather than throughout the entire vehicle body, providing localized strength enhancement while preserving the overall sliding door design benefits.
Solution Approach 2:
The patent converts the harmful effect of the entry hole (which weakens the structure) into a beneficial design by carefully shaping the hole and adding targeted reinforcement. The hole is designed to accommodate the rail part while the surrounding reinforcing structure compensates for the weakness, transforming the potential vulnerability into an accepted design feature that enables sliding door functionality without compromising collision performance.
Data Source
AI summary
A vehicle body can include a reinforcing material connected to a side sill to improve the lateral stiffness of the vehicle body, thereby improving collision performance. The vehicle can include a side sill having an entry hole configured to allow a rail unit for a sliding door to enter the inner side of the vehicle body, a rail reinforcement shaped to block the rail unit at the inner side of the vehicle body adjacent to the entry hole, and a reinforcing structure in which the rail reinforcement is connected to members crossing the vehicle body from side to side in front of and behind the entry hole to reinforce a side surface of the vehicle body.