Louvered Sidewall Cargo Container Crosswind Management
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Solution Overview
Problem
Existing cargo container assemblies, such as semi-trailers, lack the ability to effectively manage crosswind exposure through their sidewalls, which remain either fully open or closed, failing to provide a middle ground for reduced wind resistance when empty.
Innovation Solution
A cargo container assembly featuring sidewalls composed of louvers that can be actuated between a closed and open configuration, allowing crosswind passage when empty, utilizing a system of linkage bars, pivot bars, motors, and a controller to manage the louvers' position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sidewalls are kept closed during transport, then cargo security and aerodynamic efficiency are improved, but crosswind management flexibility deteriorates
Solution Approach 1:
The sidewalls are designed as dynamic structures with multiple louvers that can independently rotate between closed and open positions. This allows the container to adapt its aerodynamic profile in real-time based on wind conditions and cargo status, transforming a static structure into a dynamically adjustable one that optimizes both security and wind management.
Solution Approach 2:
The continuous sidewall is segmented into multiple discrete louvers (typically 3-7 per side), each capable of independent movement. This segmentation enables granular control over airflow and wind exposure, allowing partial opening configurations that balance cargo security with crosswind management needs.
2Ease of operation
If the sidewalls are opened for loading and unloading, then cargo access is improved, but crosswind exposure increases
Solution Approach 1:
The louvers provide dynamic control over sidewall opening, allowing the container to transition smoothly between fully closed, partially open, and fully open states. This enables operators to open only the necessary portions for cargo access while maintaining closed positions in areas where crosswind exposure would be problematic.
Solution Approach 2:
Different sections of the sidewall can have different louver positions - some louvers open for cargo access while others remain closed to maintain aerodynamic efficiency and reduce crosswind exposure in specific zones, creating localized functional areas along the container side.
3Loss of energy
If the sidewalls remain fully closed when empty, then aerodynamic efficiency is improved, but ventilation and stability control deteriorate
Solution Approach 1:
The louver system enables the empty container to dynamically adjust its ventilation and aerodynamic properties. When stability or ventilation is needed, louvers can be opened to specific degrees; when pure aerodynamic efficiency is prioritized, they can be closed, providing adaptability that static structures cannot achieve.
4Device complexity
If traditional doors or panels are used for sidewall opening, then structural simplicity is maintained, but wind management precision deteriorates
Solution Approach 1:
Instead of a single large door or panel, the sidewall is divided into multiple smaller louver segments. This segmentation provides precise control over airflow and wind exposure, allowing fine-tuned adjustment of opening degrees for each louver to optimize wind management while maintaining relative structural simplicity.
Solution Approach 2:
The louver system allows for partial opening actions rather than requiring full door openings. This enables the container to achieve adequate ventilation or cargo access with smaller, more controlled openings, reducing crosswind exposure while still meeting operational needs.
Data Source
AI summary
A louvered sidewall cargo container assembly for reducing crosswind exposure includes a cargo container, which is substantially cuboid shaped and comprises a pair of sidewalls, a front, a back, a bottom, and a roof. Each sidewall comprises a plurality of louvers. An actuator is engaged to the cargo container and is operationally engaged to each of the plurality of louvers. The actuator is positioned to selectively motivate each of the louvers between a first position a second position. In the first position, the louver is substantially perpendicular to the bottom and each of the plurality of louvers is in a closed configuration. In the second position, the louver is transverse or parallel to the bottom, extends into the cargo container, and each of the pluralities of louvers is in an open configuration. In the open configuration, the pluralities of louvers allow passage of a crosswind through the cargo container.