EV Cowl Air Intake Structure for Clean HVAC Airflow
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Solution Overview
Problem
In electric vehicles, there is a need to effectively utilize the clean air within the underhood area for HVAC systems without contamination from hydrocarbon emissions, which are absent in electric vehicles, while managing moisture and debris.
Innovation Solution
A vehicle air flow structure that includes a cowl box structure and air handling system, utilizing the clean air from the underhood area to condition and direct it into the passenger compartment, with features like seals, ducts, and a mixing valve to manage airflow and moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air is drawn from the underhood area in electric vehicles, then air quality is improved (cleaner air without hydrocarbon emissions), but moisture and debris management becomes more challenging
Solution Approach 1:
The air intake system is segmented into separate pathways: one for drawing clean air from the underhood area through the air handling structure, and another for managing moisture and debris through dedicated drainage channels and filters. This segmentation allows the system to utilize clean underhood air while independently addressing moisture and debris removal through separate structural components.
2Productivity
If the cowl box structure is located within the underhood area to draw air, then airflow efficiency is improved, but the risk of debris entry increases
Solution Approach 1:
The air handling structure acts as an intermediary component between the underhood area and the passenger compartment. It includes integrated filters and drainage systems that mediate the airflow, allowing efficient air intake from the underhood area while blocking debris and managing moisture through intermediate filtering and drainage stages.
3Productivity
If the air handling structure is attached to the dashwall with an opening, then air distribution is improved, but contamination risk from the passenger compartment increases
Solution Approach 1:
The system performs preliminary air treatment by drawing air through the air handling structure attached to the dashwall, which includes pre-filtration and moisture removal mechanisms before air enters the passenger compartment. This preliminary action ensures air cleanliness is established before distribution, preventing contamination from mixing with the clean underhood air source.
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
Enables efficient conditioning and distribution of clean air from the underhood area into the passenger compartment, improving HVAC system performance and reducing moisture and debris impact, while ensuring air quality and debris management, thus enhancing airflow and debris management, thereby improving HVAC system performance and reducing moisture and debris impact.
Implementation Method 1
The cowl box structure is located at least partially within the underhood area and is configured to draw air from the underhood area such that prior to being drawn into the cowl box structure air passes through the underhood area and into the cowl box structure through the opening in the dashwall
Data Source
AI summary
A vehicle air flow structure includes a vehicle body structure, an air handling structure and a cowl box structure of a vehicle. The vehicle body structure has a passenger compartment and a hood that covers an underhood area forward of the passenger compartment with a dashwall located between the passenger compartment and the underhood area. The dashwall further has an opening. The air handling structure is attached to the dashwall. The cowl box structure is located at least partially within the underhood area and is configured to draw air from the underhood area such that prior to being drawn into the cowl box structure air passes through the underhood area and into the cowl box structure through the opening in the dashwall and into the air handling structure.