Vehicle Cabin Venting System with Blend Door Control
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Solution Overview
Problem
High voltage chargers in PHEV vehicles can heat up the cabin air, making the charger inefficient, and the outside air vent system may inadvertently remain open, allowing outside air to enter the vehicle.
Innovation Solution
A vehicle cabin venting method that uses a controller to maintain the blend door open and ensure a flow of fresh air through the vehicle if the outside air vent system does not close, preventing outside air from entering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the outside air vent door remains open to cool the battery charger, then the charger cooling efficiency is improved, but outside air enters the vehicle cabin causing discomfort
Solution Approach 1:
The blend door acts as an intermediary element between the outside air vent door and the cabin air flow. When the outside air vent door is stuck open, the blend door is forced to the recirculation position to block outside air from entering the cabin, while still allowing the outside air vent door to remain open for charger cooling.
Solution Approach 2:
The air flow control system is segmented into two independent control mechanisms: the outside air vent door for charger cooling and the blend door for cabin air flow management. This segmentation allows independent control of each function, enabling the system to maintain charger cooling while preventing unwanted outside air entry.
2Object-affected harmful factors
If the outside air vent door is closed to prevent outside air inflow, then cabin air quality is improved, but the battery charger cannot be cooled effectively
Solution Approach 1:
The system dynamically adjusts the blend door position based on the status of the outside air vent door. When the vent door is properly closed, the blend door operates normally to control cabin air flow. When the vent door is stuck open, the blend door dynamically shifts to the recirculation position to compensate and prevent outside air entry.
3Object-affected harmful factors
If the blend door is closed to maintain cabin air flow control, then outside air entry is prevented, but fresh air circulation is reduced
Solution Approach 1:
The system takes preliminary anti-action by forcing the blend door to the recirculation position in anticipation of outside air vent door failure. This preemptive measure blocks the potential path of outside air entry through the cabin air flow path, while the charger cooling function remains intact through the separately controlled outside air vent door.
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 method effectively cools the battery charger by maintaining fresh air flow and preventing outside air from entering the vehicle, ensuring efficient operation and comfort.
Implementation Method 1
cooling a vehicle battery charger by drawing outside air through a vehicle outside air vent door
Implementation Method 2
cooling a vehicle battery charger by drawing outside air through a vehicle outside air vent door
Implementation Method 3
operating a hybrid vehicle battery system to establish and maintain flow of fresh air in a cabin of the vehicle
Data Source
AI summary
A vehicle cabin venting method includes cooling a vehicle battery charger by drawing outside air through a vehicle outside air vent door; and operating a hybrid vehicle battery system to establish and maintain flow of fresh air in a cabin of the vehicle by ensuring an open position of a blend door in the vehicle if the outside air vent door will not close. A vehicle cabin venting system is also disclosed.