Vehicle Front Pillar Stiffener and Dash Upper Side Spacing
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Solution Overview
Problem
Existing vehicle body designs fail to effectively absorb collision energy during small overlap collisions, especially when vehicle weight increases, and may not prevent side door deformation.
Innovation Solution
The vehicle body incorporates a front pillar upper with a stiffener and a dash upper side connected to the front pillar lower, featuring a distance between the rear extension part of the dash upper side and the front end of the front pillar upper stiffener, along with additional reinforcing structures to enhance bending rigidity and energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the weight of the vehicle increases, then the vehicle can carry more load and provide better comfort, but the collision energy cannot be completely absorbed by the deformation of the upper members alone
Solution Approach 1:
The front pillar is divided into two separate components: the front pillar upper and the front pillar lower. This segmentation allows each component to have optimized rigidity characteristics - the front pillar upper has higher rigidity to prevent side door deformation, while the front pillar lower can deform to absorb collision energy, resolving the contradiction between vehicle weight and collision energy absorption capability
Solution Approach 2:
Different parts of the front pillar structure are given different rigidity properties. The front pillar upper is designed with high rigidity (through reinforcement structures) to maintain structural integrity and prevent side door deformation, while the front pillar lower is designed with lower rigidity to enable energy-absorbing deformation during collisions
2Strength
If the rigidity of the front pillar is weakened to allow deformation for energy absorption, then collision energy can be absorbed during offset collision, but the collision energy of small overlap collision cannot be absorbed based on deformation of the upper member
Solution Approach 1:
The front pillar is segmented into upper and lower portions with different rigidity characteristics. The front pillar upper maintains high rigidity to prevent side door deformation during small overlap collisions, while the front pillar lower is designed to deform for energy absorption during offset collisions
Solution Approach 2:
Different rigidity properties are assigned to different locations of the front pillar structure. The front pillar upper has reinforced structures for high rigidity, while the front pillar lower has reduced rigidity to enable controlled deformation and energy absorption
Data Source
AI summary
The disclosure provides a vehicle body capable of well preventing the deformation of a side door even if the weight of the vehicle itself increases. The vehicle body includes a front pillar upper which extends rearward and upward along a side edge of a windshield, a front pillar lower which is joined to a lower end of the front pillar upper to support a front end of the side door, a dash upper side which connects an upper member to the front pillar lower while being joined to the front pillar upper at a rear extension part, and a front pillar upper stiffener which reinforces the bending rigidity of the front pillar upper. A distance is set between the rear extension part of the dash upper side and a front end of the front pillar upper stiffener above the front pillar lower.