Motor Vehicle Headlamp Dynamic Pressure Particle Barrier
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Solution Overview
Problem
Existing motor vehicle headlights require time-consuming processes to remove dirt and contamination, as current cleaning devices only address existing contamination and do not effectively prevent particle penetration.
Innovation Solution
The design incorporates a first cavity with a through-opening that generates dynamic pressure to prevent particle penetration, and a second cavity with a guide channel and Venturi nozzle to remove larger particles, along with a protective element and air discharge device to minimize contamination and protect sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover lens and screen are fastened together in a motor vehicle headlight, then the headlight structure is complete and functional, but particles can penetrate between the cover lens and screen causing contamination that requires time-consuming cleaning
Solution Approach 1:
The patent applies preliminary action by creating a dynamic pressure barrier before particles can penetrate into the sealing area. The through-opening is positioned and dimensioned to generate dynamic pressure in advance that prevents particle infiltration, rather than attempting to clean particles after they have contaminated the surface
Solution Approach 2:
The patent uses pneumatic principles by utilizing air flow through the through-opening to create dynamic pressure that acts as a protective barrier. The air flow generated through the specifically designed opening prevents particles from penetrating into the cavity between the cover lens and screen, eliminating the need for mechanical cleaning
2Reliability
If the through-opening area is increased to allow more air flow for dynamic pressure, then particle prevention is improved, but the structural integrity and sealing between cover and lens may be compromised
Solution Approach 1:
The patent applies local quality by concentrating the protective function in a specific localized area (the through-opening) rather than requiring complex sealing across the entire cover-lens interface. The opening is strategically positioned and dimensioned to generate sufficient dynamic pressure locally to prevent particle penetration without compromising overall sealing
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 solution effectively prevents contamination of the headlight's exterior and sensor windows, reducing the need for frequent cleaning and ensuring optimal visibility and functionality.
Implementation Method 1
the first through-opening being designed in such a way that air flowing onto the orifice creates a dynamic pressure in a region in front of the first through-opening, with the dynamic pressure preventing penetration of first particles, which have a first grain size distribution, via the first through-opening in the first cavity
Implementation Method 2
second particles, which have a second grain size distribution which is larger than the first grain size distribution, and enter the first cavity via the first through-opening, are guided by gravity through the guide channel into the second cavity
Data Source
Figure 1~3
AI summary
Motor vehicle headlight (1) comprising a housing (2), a cover plate (3) terminating the housing (2) and a aperture (4) attached to the cover plate (3), wherein the aperture (4) has a rear side facing the cover plate (3) and a front side facing away from the cover plate (3), wherein the aperture (4) is designed such that a first cavity (5a) is formed between the aperture (4) and the cover plate (3), wherein the contact between the aperture (4) and the cover plate (3) is sealed, wherein the aperture (4) has a first through-opening (4a) leading into the first cavity (5a), wherein the first through-opening (4a) is designed such that a dynamic pressure is generated in an area in front of the first through-opening (4a) by an incoming air flowing onto the aperture (4), wherein the dynamic pressure allows the penetration of first particles having a first particle size distribution,via the first through-opening (4a) into the first cavity (5a) is prevented.