Sliding Door Drive Protective Cover for Post-Impact Opening
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Solution Overview
Problem
In vehicle impact events, modern sliding door systems driven by door drive units face challenges in maintaining functionality, as they are not protected from deformation by traditional hinge-based designs, leading to potential failure in opening the doors post-impact.
Innovation Solution
A protective system comprising a rigid protective cover structure attached to the vehicle body, acting as a barrier between the door drive unit and exterior structures, designed to absorb energy and prevent objects from impacting the door drive unit, ensuring its functionality is maintained for emergency door opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hinge-based door constructions are used, then the vehicle body structure can be designed for low deformations, but modern sliding door systems require protection from impact to maintain functionality
Solution Approach 1:
A protective cover structure is introduced as an intermediary element between the door drive unit and the exterior environment. This cover acts as a mediator that absorbs and deflects impact forces, preventing direct transmission to the door drive unit while allowing the door system to maintain its sliding door configuration and functionality
2Strength
If the protective cover structure is made rigid to block objects, then the door drive unit is protected from impact, but the structure requires additional material and weight
Solution Approach 1:
The protective cover structure implements local quality by providing rigid protection only in the specific areas where impact forces are most likely to occur, rather than making the entire door system uniformly heavy. The cover is strategically designed to protect critical components like the door drive unit while minimizing unnecessary material usage in non-critical areas
3Reliability
If the protective cover structure deforms to absorb energy, then the door drive unit is protected from damage, but the cover structure itself undergoes deformation
Solution Approach 1:
The protective cover structure is designed with energy-absorbing characteristics that allow it to deform in a controlled manner during impact events. This beforehand cushioning approach enables the cover to absorb impact energy through planned deformation, protecting the door drive unit while the cover itself can be replaced or repaired after the event
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The protective system effectively prevents damage to the door drive unit, allowing for manual or electric operation of vehicle doors even after an impact event, ensuring occupant egress by deflecting objects and maintaining the door drive unit's functionality.
Implementation Method 1
the protective system is arranged as an energy absorbing barrier structure configured for absorbing energy from moving objects through deformation of the protective cover structure when impacted by the moving objects in a vehicle impact event
Implementation Method 2
The protective cover structure is designed with a rigid construction that is blocking objects from impacting the door drive unit, and the objects may for example be deflected away from the door drive unit
Data Source
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AI summary
A protective system for protecting a door drive unit of a vehicle, where the door drive unit is attached to a vehicle body structure and connected to a vehicle door. The door drive unit is configured for displacing the vehicle door relative to the vehicle body structure between a closed door position and open door positions. The protective system comprises a protective cover structure attached to the vehicle body structure, and the protective cover structure is arranged as a protective barrier between the door drive unit and an exterior vehicle structure. The protective cover structure is configured for preventing objects from impacting the door drive unit in a vehicle impact event.