A-pillar Lower Part Reinforcement Panel Segmentation

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Solution Overview

Problem

Conventional vehicle front structures face challenges in maintaining passenger seat safety during front, oblique, or offset collisions due to significant deformation of the A-pillar and side sill members, which compromises the rigidity needed to absorb impact effectively.

Innovation Solution

The vehicle front body incorporates an A-pillar lower part with a reinforcement panel dividing it into two members, connected to a side sill part with a bracket, forming two spaces that enhance collision rigidity by distributing impact forces and reducing deformation, while maintaining a lightweight design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If rigidity of the rear portion of the front side member is increased to protect the passenger seat, then passenger seat safety is improved, but deformation of the A-pillar increases significantly

Engineering Contradiction:

Improvepassenger seat safetyVSAvoidA-pillar deformation

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The A-pillar lower part is divided into two separate members (first and second members) positioned side by side in the width direction of the vehicle. This segmentation allows each member to independently bear and distribute impact forces, increasing overall structural rigidity while controlling deformation of individual components during collisions.

Inventive Principle:

Principle #1Segmentation

2Reliability

If rigidity of the A-pillar is increased to reduce passenger seat deformation, then passenger seat safety is improved, but overall vehicle weight increases

Engineering Contradiction:

Improvepassenger seat safetyVSAvoidvehicle weight

Core Design Contradiction:

ReliabilityVSWeight of moving object

Solution Approach 1:

The reinforcement panel is strategically positioned only in the lower part of the A-pillar where impact forces are most concentrated during collisions. This localized reinforcement provides enhanced rigidity exactly where needed to protect the passenger seat, while leaving other portions of the vehicle structure at optimal weight, avoiding unnecessary overall weight increase.

Inventive Principle:

Principle #3Local quality

3Strength

If a reinforcement structure is added to the A-pillar lower part, then collision rigidity is improved, but device complexity increases

Engineering Contradiction:

Improvecollision rigidityVSAvoidstructural complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The reinforcement panel is integrated directly between the inner and outer panels of the A-pillar lower part, merging multiple structural functions into a single unified component arrangement. This integration achieves enhanced collision rigidity through the combined action of three panels working together, while avoiding the need for separate, additional reinforcement structures that would increase complexity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP3733484B1Front body of vehicle

Publication Date: 2022.12.14 HYUNDAI MOTOR CO LTD

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AI summary

A front body of a vehicle includes an A-pillar lower part configured with an inner panel and an outer panel to make a single member. The A-pillar lower part extends downward from a front end of an A-pillar and has a reinforcement panel between the inner panel and the outer panel. The reinforcement panel extends in a longitudinal direction to divide an inside of the A-pillar lower part into two members.