Retractable Pickup Bed Cover for Aerodynamic Drag Reduction
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Solution Overview
Problem
Vehicles with blunt rear ends experience significant aerodynamic drag due to airflow separation, leading to increased fuel consumption, especially at high speeds, and existing solutions are impractical for crowded urban areas due to increased length requirements.
Innovation Solution
Aerodynamic drag reducing apparatus with gently sloping surfaces that can be configured to extend or retract, using nested shapes and linkages to maintain airflow attachment, allowing for practical use in both high-speed and congested areas, and featuring optional motorized extension and covers to prevent debris accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If aerodynamic drag reducing apparatus with extended configuration is used, then fuel consumption is reduced, but vehicle length increases making it impractical for crowded areas
Solution Approach 1:
The apparatus employs a retractable configuration system with linkages that allow the aerodynamic surfaces to extend or retract based on driving conditions. This dynamic adjustment enables the vehicle to achieve reduced fuel consumption at highway speeds while maintaining a compact form for urban maneuvering
Solution Approach 2:
The aerodynamic surfaces are designed to nest within the vehicle body when retracted, similar to nested dolls. This nesting mechanism allows the extended configuration to be stored compactly within the vehicle's existing structure, minimizing the increase in vehicle length while still providing drag reduction capability when extended
2Force
If aerodynamic drag reducing apparatus is used, then aerodynamic drag is reduced, but device complexity increases due to additional mechanisms
Solution Approach 1:
The aerodynamic drag reducing apparatus is divided into multiple independent surfaces or panels that can be individually adjusted. Each surface is connected to the vehicle body through separate linkage mechanisms, allowing for modular implementation and maintenance while collectively achieving drag reduction
Solution Approach 2:
The linkage mechanisms are designed to utilize aerodynamic forces and vehicle motion to automatically position the drag reducing surfaces. The system self-adjusts based on flow conditions and vehicle speed, reducing the need for complex active control systems while maintaining optimal aerodynamic performance
3Adaptability or versatility
If retractable configuration system is added, then adaptability to different driving conditions is improved, but manufacturing cost increases
Solution Approach 1:
The retractable aerodynamic surfaces serve multiple functions: they reduce drag at highway speeds, can be retracted for urban driving, and may provide additional benefits such as cargo protection or aerodynamic assistance during loading/unloading operations. This multi-functionality justifies the added manufacturing cost by providing value across multiple operational scenarios
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
Reduces aerodynamic drag and fuel consumption, particularly at highway speeds, while maintaining practicality in crowded areas by adjusting configuration, and prevents debris from reaching internal components.
Implementation Method 1
a significant amount of aerodynamic drag is created when a vehicle travels at typical velocities on a modern roadway. This is partly due to areas of low pressure that act on the rear surfaces of the vehicle. The low pressure becomes more pronounced as airflow over the vehicle separates from the vehicle surfaces.
Implementation Method 2
The low air pressure acting on the rear surfaces of a moving vehicle produces a force that resists the forward motion of the vehicle. This force is opposed by the vehicle's engine and requires power that is typically produced by burning fuel.
Data Source
AI summary
An apparatus behind a passenger cab of a pickup truck may provide access to an interior of a pickup truck box, when retracted, and a cover, when extended. The apparatus, when extended, may produce an aerodynamic shape that significantly reduces drag on the pickup truck. The apparatus, at least when retracted, may allow rear visibility. Extension and retraction of the apparatus may be motorized and may further be done remotely and/or automatically. The apparatus may include a plurality of moveable panels linked together, and/or the panels may slope. Adjacent panels may be linked together by one or more hinges. A pickup truck may include such an apparatus.