Motor Vehicle Rear Light Air Outlet Design
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Solution Overview
Problem
Existing motor vehicle rear end designs face issues with air throughput fluctuations due to body shell tolerances, leading to whistling noises and compromised cleaning accessibility, particularly with raised bulges on rear lights that impede styling and maintenance.
Innovation Solution
The motor vehicle rear end features air outlet openings in the side wall regions, arranged flush with a smooth surface, integrated into the covering panes of the rear lights, which communicate with air ducts to manage airflow effectively, allowing for easy cleaning and maintaining stability with reduced wall thickness through a C-shaped hole pattern, utilizing natural pressure drops during vehicle travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air outlet openings are integrated into the covering panes of rear lights, then airflow management is improved and whistling noises are reduced, but cleaning accessibility is impeded
Solution Approach 1:
A removable cover element is introduced as an intermediary component that seals the air outlet openings during normal operation to prevent whistling noises, and can be removed to provide access for cleaning the air ducts and openings. This mediator allows both functions to coexist without direct conflict.
2Reliability
If raised bulges are integrated into rear lights for air separation, then airflow stall is improved, but design aesthetics and cleaning accessibility are compromised
Solution Approach 1:
The air separation function is extracted from the raised bulge structure on the rear light and relocated to a separate spoiler element positioned on the rear cover. This extraction allows the rear light to maintain its aesthetic design without protrusions while the spoiler provides the necessary airflow management.
3Productivity
If air outlet openings are positioned close to the air separation edge, then airflow efficiency is improved, but whistling noises increase due to narrow cross sections
Solution Approach 1:
The air outlet openings are repositioned from a location close to the air separation edge to a position on the rear cover in the vicinity of the rear bulkhead. This spatial relocation in another dimension allows sufficient cross-sectional area for noise-free airflow while maintaining connection to the air separation function through the air duct system.
4Ease of manufacture
If body shell tolerances are compensated for in gap dimensions, then assembly flexibility is improved, but air throughput fluctuation increases
Solution Approach 1:
A seal element is introduced as an intermediary component between the air duct and the body shell opening. This seal element compensates for body shell tolerances while maintaining a consistent, controlled cross-sectional area for airflow, preventing both assembly difficulties and air throughput fluctuations.
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
This configuration ensures reliable airflow management, reduces whistling noises, and enhances design aesthetics and maintenance accessibility by maintaining airflow stability and smooth surface contours while preserving the structural integrity of the rear lights.
Implementation Method 1
utilizing natural pressure drops during vehicle travel
Data Source
AI summary
A motor vehicle rear end is delimited by a rear bulkhead, side wall regions, and a rear cover. An air separation edge extends on the rear cover in the width direction of the motor vehicle. Lateral rear lights are integrated into the motor vehicle rear end, and include means, which are arranged in the side wall regions, for release of the side wall flow, and which extend at a distance below the air separation edge over a height region of the associated rear light (20) and at a distance from the rear bulkhead. At least one opening, through which air flows, is provided in a covering element arranged at the end of an air duct as a means for release of the side wall flow in both side wall regions.