Movable Skirt Fairing for Tractor-Trailer Drag Reduction
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Solution Overview
Problem
Conventional long-haul cargo trailers experience significant aerodynamic drag and turbulent airflow, leading to increased fuel consumption and Nitrogen Oxide emissions, as well as premature wear and noise due to wind-force loading, which existing systems fail to adequately address.
Innovation Solution
An aerodynamic fairing assembly is designed for tractor-trailer vehicles, comprising a front skirt fairing, movable skirt fairing, and exit fairing system, which directs airflow to reduce drag by promoting laminar flow and is adjustable to accommodate various trailer configurations, using materials like steel, aluminum, and polymers for structural rigidity and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional trailers operate at highway speeds, then cargo transport is achieved, but significant aerodynamic drag and turbulent airflow increase fuel consumption and emissions
Solution Approach 1:
The aerodynamic fairing assembly is divided into multiple functional segments: front skirt fairing (with front cap and side skirt fairings), movable skirt fairing (with front panel, wheel panel, and rear panel), and exit fairing system (with forward panel, transition, and rear panel). Each segment addresses specific airflow problems in different regions of the trailer undercarriage, allowing targeted optimization of aerodynamic performance to reduce drag and improve fuel efficiency
Solution Approach 2:
The movable skirt fairing is designed to move forward and rearward along the length of the trailer, allowing dynamic adjustment to accommodate various trailer configurations and optimize aerodynamic performance for different operating conditions. This dynamic capability enables the system to maintain effective airflow management across diverse scenarios
2Reliability
If conventional trailers operate at highway speeds, then cargo transport is achieved, but turbulent airflow causes premature wear and noise due to wind-force loading
Solution Approach 1:
The aerodynamic fairing assembly proactively counteracts wind-force loading by directing airflow smoothly over the trailer undercarriage components before turbulent conditions can develop. The fairing structure creates a protective airflow pattern that prevents harmful wind forces from directly impacting structural members, reducing vibration, noise, and premature wear before they occur
3Use of energy by moving object
If aerodynamic fairing assembly is designed to reduce drag, then fuel efficiency improves, but system complexity increases with multiple fairing components
Solution Approach 1:
The fairing assembly is segmented into modular components (front skirt fairing, movable skirt fairing, exit fairing system) that can be independently designed, manufactured, and installed. This segmentation allows for optimized aerodynamic performance through specialized design of each segment while facilitating easier maintenance and replacement of individual components without replacing the entire system
Solution Approach 2:
The aerodynamic fairing assembly is designed to accommodate various trailer configurations through the movable skirt fairing's ability to move forward and rearward, and the adjustable positioning of fairing components. This multi-functionality allows a single fairing system design to serve multiple trailer types and operating conditions, reducing the need for multiple specialized systems
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 aerodynamic fairing assembly significantly reduces aerodynamic drag, enhances airflow continuity, and minimizes wear and noise, thereby improving fuel efficiency and reducing emissions while maintaining adaptability to different trailer designs.
Implementation Method 1
directs airflow to reduce drag by promoting laminar flow
Implementation Method 2
significantly reduces aerodynamic drag
Data Source
AI summary
An aerodynamic fairing assembly for attachment to a trailer of a tractor-trailer. The aerodynamic fairing assembly may comprise a front skirt fairing and a movable skirt fairing that is configures to move forward and rearward along the length of the trailer. The front skirt faring and movable skirt fairing are coupled to the trailer by one or more mounting brackets.