Vehicle Front Pillar Stud and Garnish Design
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Solution Overview
Problem
Existing vehicle body front structures with hollow cross-section front pillars limit further reduction in pillar width, thereby restricting the improvement of a driver's field of vision.
Innovation Solution
A vehicle body front structure featuring a stud positioned between the front glass and subsidiary glass, with a garnish covering the stud from the outside, which supports the glasses and minimizes impact loads, allowing for a narrower pillar width and enhanced field of vision while maintaining strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hollow cross section is formed in the front pillar to increase strength, then the strength of the front pillar is improved, but the width of the front pillar cannot be further reduced, which limits the improvement of the driver's field of vision
Solution Approach 1:
The front pillar structure is segmented into multiple functional parts: the front pillar upper part forming the load path, the stud positioned in front of it for glass support, and the garnish covering the stud. This segmentation allows the load-bearing function to be separated from the visual obstruction element, enabling the stud to be narrower while maintaining overall strength through the hollow cross-sectioned upper part.
Solution Approach 2:
The study position is moved to another dimension by placing it in front of the front pillar upper part rather than using the full pillar width. The stud extends forward from the pillar upper part, utilizing the depth dimension to provide glass support functionality without increasing the width dimension that obstructs the driver's view.
2Length of moving object
If the width of the front pillar is reduced to improve the driver's field of vision, then the field of vision is improved, but the strength and structural integrity of the front pillar may be compromised
Solution Approach 1:
The front pillar structure is segmented into multiple functional parts: the front pillar upper part forming the load path, the stud positioned in front of it for glass support, and the garnish covering the stud. This segmentation allows the load-bearing function to be separated from the visual obstruction element, enabling the stud to be narrower while maintaining overall strength through the hollow cross-sectioned upper part.
Solution Approach 2:
The front pillar upper part employs a hollow cross-sectioned composite structure that provides high strength-to-weight ratio. This composite design allows the pillar to maintain structural integrity while reducing material usage and overall width, thereby improving the driver's field of vision without compromising strength.
3Strength
If a garnish is added to cover the stud to maintain aesthetic appearance and protect the structure, then the structural integrity is maintained, but the device complexity increases
Solution Approach 1:
The garnish serves multiple functions simultaneously: it covers the stud from the outer side to maintain aesthetic appearance, provides additional structural support and protection, and helps seal the gap between the front glass and subsidiary glass. By consolidating these multiple functions into a single component, the overall device complexity is minimized while achieving structural integrity and aesthetic requirements.
Solution Approach 2:
The garnish is integrated with the stud and front pillar upper part structure, merging the protective covering function with the structural support elements. This integration reduces the number of separate components and assembly steps, thereby minimizing device complexity while maintaining structural integrity.
Data Source
AI summary
A vehicle body front structure includes a front glass, a front pillar having a subsidiary glass provided at further outward in a vehicle width direction of a vehicle body than the front glass, a front pillar upper part provided between a roof and an upper member of the vehicle body and forming a load path of a front collision together with the upper member, and a stud provided in front of the front pillar upper part and configured to support an end portion of the front glass and an end portion of the subsidiary glass, and a garnish configured to cover the stud from an outer side of a passenger compartment.