Vehicle Cowl Structure for Air-Water Separation in Narrow Passages
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Solution Overview
Problem
Existing vehicle cowl structures face challenges in achieving satisfactory separation between air and liquid, particularly rainwater, due to narrow passageways and high flow velocities, which complicates effective separation.
Innovation Solution
A vehicle cowl structure with a gas-liquid separation mechanism, including a chamber with a blocking wall, water inlets, and drainage outlets, is designed to separate air and liquid by directing airflow through a duct throttle part and utilizing vortex flows to effectively drain liquid from the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the passageway for air in the cowl is narrowed to reduce size, then the cowl structure becomes more compact, but the flow velocity of outside air increases and gas-liquid separation becomes difficult
Solution Approach 1:
The cowl structure is divided into multiple functional segments: a gas-liquid separation chamber with blocking walls to separate water from air, a heating chamber with heating elements to prevent freezing, and an air outlet passage. This segmentation allows each section to perform its specific function independently, enabling effective separation despite narrow overall dimensions.
Solution Approach 2:
The patent introduces vertical dimensionality by stacking functional chambers one above another (separation chamber at bottom, heating chamber above it). This vertical arrangement allows multiple processes to occur simultaneously in different height levels, achieving compact horizontal footprint while maintaining adequate flow paths for gas-liquid separation.
2Volume of moving object
If the passageway for air in the cowl is narrowed to reduce size, then the cowl structure becomes more compact, but gas-liquid separation becomes difficult
Solution Approach 1:
The cowl structure is divided into multiple functional segments: a gas-liquid separation chamber with blocking walls to separate water from air, a heating chamber with heating elements to prevent freezing, and an air outlet passage. This segmentation allows each section to perform its specific function independently, enabling effective separation despite narrow overall dimensions.
Solution Approach 2:
Blocking walls are introduced as intermediary structures within the separation chamber to create turbulence and enhance the separation between gas and liquid phases. These walls act as mediators that force the airflow to change direction and separate water droplets from the air stream, improving separation effectiveness in the compact space.
3Reliability
If a chamber is added to the cowl body, then liquid can be effectively separated and drained, but the device complexity increases
Solution Approach 1:
The gas-liquid separation chamber is merged with the cowl body structure itself, using the cowl body as the housing for the separation chamber. The blocking walls and drainage mechanisms are integrated into the existing cowl architecture rather than being separate add-on components, reducing overall device complexity while maintaining separation functionality.
Solution Approach 2:
The chamber structure serves multiple functions simultaneously: it acts as the housing for the separation process, provides the blocking walls for turbulence generation, contains the drainage mechanism, and integrates with the heating chamber above it. This multi-functionality reduces the need for separate components, simplifying the overall device despite adding separation capability.
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 structure achieves efficient separation of air and liquid, ensuring dry air is supplied to the vehicle interior while effectively draining liquid, even in conditions with high airflow velocities and rainwater ingress.
Implementation Method 1
The water inlet allows liquid inside the cowl body to be drawn into the chamber interior
Implementation Method 2
utilizing vortex flows to effectively drain liquid from the system
Implementation Method 3
The chamber-side drainage outlet allows the liquid drawn into the chamber interior to be drained out
Data Source
AI summary
A vehicle cowl structure includes a cowl body, a cowl panel, an air outlet, and a chamber. The cowl body has a recessed shape with an upper opening facing a vehicle upper side when viewed in a longitudinal direction thereof. The cowl panel closes the upper opening of the cowl body and has an outside air inlet. The outside air inlet allows outside air to be introduced into the cowl body. The air outlet is disposed in the cowl body and allows air inside the cowl body to be discharged toward a vehicle interior. The chamber has a hollow interior, is provided in a bottom part of the cowl body, and is disposed between the outside air inlet and the air outlet in a vehicle width direction. The chamber includes a blocking wall, a chamber-side drainage outlet, and a communication port. The blocking wall has a water inlet.