Motor Vehicle Lighting Ventilation with Adjustable Air Outlet

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Solution Overview

Problem

Existing motor vehicle headlight designs suffer from passive and uncontrolled air exchange through ventilation openings, leading to moisture accumulation and limited prevention of dust and dirt entry.

Innovation Solution

A ventilation arrangement with an adjustable air outlet opening and filtering membrane, allowing controlled ambient air supply to the lighting chamber, including a condensation arrangement to dehumidify air and prevent moisture condensation, and an air inlet opening utilizing vehicle movement for automatic ventilation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a single ventilation opening with filtering membrane is used, then dust and dirt particles are filtered, but air exchange is passive and uncontrolled

Engineering Contradiction:

Improvedust and dirt particlesVSAvoidair exchange control

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The single ventilation opening is divided into multiple ventilation openings (first, second, third ventilation openings) with different functions. The first ventilation opening has a filtering membrane for dust filtration, while the second and third openings enable controlled air exchange without filters, allowing active ventilation control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The ventilation system transitions from passive diffusion-based air exchange to active controlled ventilation. The control unit dynamically adjusts the ventilation process by actuating the cover element between first and second positions, enabling on-demand active ventilation when moisture accumulation is detected.

Inventive Principle:

Principle #15Dynamics

2Productivity

If ambient air is supplied uncontrolled through ventilation opening, then air exchange occurs, but moisture accumulation cannot be effectively prevented

Engineering Contradiction:

Improveair exchange rateVSAvoidmoisture prevention

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The control unit receives signals from the moisture sensor that detects moisture accumulation in the headlight housing. Based on this feedback, the control unit activates the cover element to switch between positions, enabling on-demand active ventilation when moisture accumulation is detected and maintaining normal filtered ventilation when no moisture is present.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If filtering membrane covers ventilation opening, then dust filtration is improved, but air flow resistance increases

Engineering Contradiction:

Improvedust particlesVSAvoidair flow velocity

Core Design Contradiction:

Object-affected harmful factorsVSSpeed

Solution Approach 1:

The ventilation system is segmented into different pathways: the first ventilation opening with filtering membrane for dust filtration, and the second ventilation opening without filter for high-velocity air exchange during active ventilation mode. This segmentation allows the system to optimize between filtration and air flow velocity depending on operational requirements.

Inventive Principle:

Principle #1Segmentation

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

Optimizes air exchange and prevents moisture condensation on the light-permeable section by adjusting air flow velocity and ensuring effective filtration, reducing dust and dirt entry while maintaining efficient ventilation.

Implementation Method 1

the latter are customarily covered by a filtering membrane such that air and moisture can be exchanged with the surroundings, but dust and dirt particles can only enter to a small extent

Methodology Applied

Scientific EffectFiltration: Filter (physical)

Implementation Method 2

the air in the headlight housing is exchanged only passively by means of diffusion with the ambient air

Methodology Applied

Scientific EffectDiffusion: Diffusion

Data Source

PatentUS9534760B2Lighting arrangement for a motor vehicle

Publication Date: 2017.01.03 DR ING H C F PORSCHE AG

AI summary

A lighting arrangement includes a lighting chamber having a light-permeable section and a ventilation opening with a filtering membrane. A light source for supplying light is arranged in the lighting chamber. A ventilation arrangement is assigned to the ventilation opening so as to supply ambient air through the ventilation opening to the lighting chamber. The ventilation arrangement includes an air outlet opening assigned to the ventilation opening of the lighting chamber so as to supply the ambient air to the ventilation opening. A distance between the air outlet opening and the filtering membrane is configured so as to be adjustable.