Cabin Air Extraction Snorkel Layout for Water-Intrusion Prevention
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Solution Overview
Problem
Modern vehicles with tightly sealed cabins face challenges in pressure management, particularly during wading applications, where low air extractor positions are undesirable and prone to water intrusion, and existing solutions are aesthetically unappealing and obstructive.
Innovation Solution
A cabin air extraction assembly that utilizes an air extractor input port in the rear cabin, conduiting air to a snorkel assembly within a sealed body panel near the rear wheel well, featuring a one-way pressure relief valve and snorkel concept, allowing air to be vented above the wading line without visible external components or water intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the air extractor is positioned low on the vehicle body to hide it aesthetically, then the aesthetic appearance is improved, but the air extractor becomes prone to water intrusion during wading applications
Solution Approach 1:
The patent introduces a snorkel assembly that extends vertically through the body panel, creating a multi-level air extraction system. The snorkel allows air to be extracted from a high position (above wading line) while the low position on the body panel serves only for aesthetic concealment, not for air extraction. This dimensional separation resolves the contradiction between aesthetic appearance and water intrusion prevention.
2Object-affected harmful factors
If the air extractor is positioned high on the vehicle body to prevent water intrusion, then water intrusion is prevented, but the air extractor becomes visible and obstructive on the exterior
Solution Approach 1:
The patent nests the functional air extraction components within the vehicle's existing body structures. The snorkel assembly is integrated into the body panel, and the air extractor input port is concealed within interior structures such as speaker assemblies or vent covers. This nesting allows the high-position snorkel to function while remaining aesthetically integrated into the vehicle design.
3Shape
If the air extractor input port is concealed within interior structures, then aesthetic appearance is improved, but the complexity of the air conduction path increases
Solution Approach 1:
The patent introduces interior grates, vent covers, or speaker assemblies as intermediary structures that serve dual purposes: concealing the air extractor input port for aesthetic purposes while simultaneously providing a structured air conduction path. These intermediaries channel air from the cabin through the concealed port to the snorkel assembly, resolving the contradiction between aesthetics and complexity.
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 solution maintains passenger comfort by allowing HVAC operation with fresh outside air without cabin pressure issues, even during wading, without rolling down windows, while hiding the air extractor input port and preventing water intrusion, thus addressing both operability and aesthetics concerns.
Implementation Method 1
The snorkel assembly includes a one-way pressure relief valve and employs a snorkel concept similar to that employed in sport utility and adventure vehicles for internal combustion engine intake air
Data Source
AI summary
A cabin air extraction assembly for a vehicle that utilizes an air extractor input port disposed in the rear portion of the cabin of a vehicle that conduits cabin air to a snorkel assembly disposed within a sealed or substantially sealed body panel or side structure near the rear wheel well of the vehicle, for example. This snorkel assembly includes a one-way pressure relief valve. Because the snorkel assembly is positioned such that it is not prone to obstruction or the intake of water in a wading application, there is no risk of water intrusion into the cabin of the vehicle, even if the bottom portion of the snorkel assembly is disposed below the wading line during vehicle operation. Thus, the cabin air extraction assembly and associated method promote passenger comfort by allowing the HVAC system of a vehicle to be operated using fresh, outside air without cabin pressure problems, even during a wading application.