Trailer Airfoil Drag Reduction Flexible Mounting
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Solution Overview
Problem
Long-haul semi-trailers exhibit suboptimal aerodynamic performance, leading to significant aerodynamic drag, increased fuel consumption, and emissions due to turbulent airflow and pressure differentials, which also cause premature wear and instability.
Innovation Solution
The implementation of an aerodynamic apparatus featuring a combination of airfoils and stiffeners, with a flexible mounting system, designed to reduce turbulent flow characteristics and stabilize airflow, thereby improving aerodynamic efficiency and reducing drag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional trailer design is used, then manufacturing simplicity is maintained, but aerodynamic drag increases significantly
Solution Approach 1:
The aerodynamic improvement system is divided into separate, modular components including airfoils, fairings, and deflectors that can be independently designed, manufactured, and attached to the trailer. This segmentation allows the aerodynamic elements to be added without fundamentally redesigning the entire trailer structure, thus reducing overall system complexity while achieving drag reduction.
Solution Approach 2:
The patent introduces intermediate aerodynamic elements such as airfoils and fairings that act as mediators between the airflow and the trailer structure. These intermediary components manage airflow patterns and reduce turbulence without requiring direct modification of the trailer's primary structure, thereby achieving aerodynamic improvement with minimal structural complexity.
2Reliability
If rigid mounting system is used, then structural stability is improved, but vulnerability to wind-force loading increases
Solution Approach 1:
The mounting system incorporates flexible elements and thin-film structures that can bend and deform under wind loading conditions. This flexibility allows the aerodynamic components to accommodate transient wind forces without causing structural failure or premature wear, while still maintaining reliable attachment to the trailer.
Solution Approach 2:
The mounting system is designed with cushioning characteristics that absorb and dissipate wind-force loads before they can cause damage to the rigid trailer structure. This prior cushioning effect protects the overall system from the harmful effects of transient wind loading while maintaining structural stability.
3Use of energy by moving object
If aerodynamic components are added, then fuel efficiency improves, but device complexity increases
Solution Approach 1:
The aerodynamic components are designed with dynamic characteristics that allow them to adapt to varying operating conditions such as different speeds and weather patterns. This dynamic design enables the system to maintain optimal aerodynamic performance across a range of conditions without requiring an overly complex system with multiple adjustable components.
Solution Approach 2:
The aerodynamic components are designed to perform multiple functions simultaneously - reducing drag, managing airflow patterns, and protecting the trailer structure. This multi-functionality reduces the need for separate specialized components, thereby improving fuel efficiency without proportionally increasing system complexity.
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 solution effectively minimizes aerodynamic drag, enhances fuel efficiency, and stabilizes the vehicle, reducing wear and emissions while maintaining smoother airflow over long-haul tractor-trailer vehicles.
Implementation Method 1
aerodynamic apparatus configured to minimize aerodynamic drag and maintain smoother air flow over highway-operated vehicles
Implementation Method 2
The apparatus includes an airfoil and a stabilizer interconnected by a series of stiffeners
Implementation Method 3
The apparatus includes an airfoil and a stabilizer interconnected by a series of stiffeners
Implementation Method 4
Most large long-haul cargo trailers exhibit less than optimal aerodynamic performance during highway operation. At highway speeds, conventional trailers develop a substantial amount of turbulent airflow in the region between the axles below the trailer box and behind the trailer
Implementation Method 5
Pressure drag is caused by large pressure differentials in the wake of a trailer due to rapid flow separation creating turbulent flow characteristics
Data Source
AI summary
An aerodynamic device for attachment to a trailer of a tractor-trailer having a centerline, a trailer sidewall and a trailer door. The aerodynamic device comprises an airfoil and a flexible mounting system. The airfoil comprises a leading edge, a trailing edge, an inner surface, and an outer surface. The flexible mounting system comprises a door hinge, a mounting bracket, a trailer hinge and a door strap. The door hinge is coupled to the trailer door. The mounting bracket is coupled to the inner surface of the airfoil. The trailer hinge is coupled to the mounting bracket and the trailer sidewall. The door strap coupled to the door hinge at a first end and the mounting bracket at a second end.