Vehicle Door Assembly With Integrated B-Pillar for Unobstructed Access
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Solution Overview
Problem
Existing vehicle door assemblies with B pillars obstruct access to the interior, necessitating improvements for unhindered ingress and egress, particularly in coach-style configurations where front and rear doors open in opposite directions.
Innovation Solution
A door assembly design that integrates B pillar functionality into the doors themselves, using cant and rocker rails with integrated latch and striker systems, allowing doors to open without a B pillar obstruction, and incorporating multiple seals for enhanced safety and sealing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a B pillar is installed in the vehicle body to provide structural support and safety, then structural integrity is improved, but access to the interior is obstructed
Solution Approach 1:
The B pillar structural support function is extracted from the body and relocated to the doors themselves. The front door includes a front B pillar region and the rear door includes a rear B pillar region, which provide the necessary structural support while allowing the body to have no B pillar, thus creating an unobstructed opening when doors are open.
Solution Approach 2:
The B pillar functionality is merged with the door structures. The front and rear doors are configured to collectively provide B pillar support when closed, combining the structural support function with the door assembly rather than having a separate body-mounted B pillar.
2Adaptability or versatility
If independent opening/entrance is provided for each door, then access flexibility is improved, but the opening size is limited by the B pillar position
Solution Approach 1:
The B pillar is extracted from the body structure, allowing the door openings to extend further inward without obstruction. This creates a larger effective opening area while maintaining independent door operation capability.
Solution Approach 2:
The opening geometry is changed by removing the vertical B pillar obstruction, allowing the opening to extend in the horizontal dimension across the entire width where the B pillar would have been, effectively increasing the opening area.
3Area of stationary object
If B pillar regions are integrated into the doors, then opening area is increased, but device complexity increases
Solution Approach 1:
The B pillar regions are merged with the door assemblies, combining multiple functions (structural support, door operation, sealing surfaces) into integrated components. This reduces the need for separate body-mounted structures and simplifies the overall system despite the increased functional requirements.
Solution Approach 2:
The door assemblies are designed to perform multiple functions: providing structural support (B pillar regions), enabling door operation (hinge and latch systems), and creating sealing surfaces (B pillar sealing regions). This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
A door assembly for a vehicle includes a body that has an A pillar, a C pillar, a cant rail extending between a top of the A pillar and a top of the C pillar, and a rocker rail that extends between a bottom of the A pillar and a bottom of the C pillar. A front door is moveably connected to the A pillar along a front connector, and has a front B pillar region spaced from the front connector. A rear door is moveably connected to the C pillar along a rear connector, and has a rear B pillar region spaced from the rear connector. The front and rear doors are moveable into a closed position in which the front B pillar region of the front door and the rear B pillar region of the rear door overlie one another to close the body.