Aerodynamic Inserts for Cargo Trailer Drag Reduction
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Solution Overview
Problem
Over-the-road trailers face challenges in achieving aerodynamic efficiency, leading to increased fuel consumption due to suboptimal airflow management around the cargo area, particularly between the front and side walls and the roof.
Innovation Solution
The implementation of a cargo transport design featuring upper rails with integrated aerodynamic inserts and corner castings that direct airflow from the front and side walls onto the roof, utilizing convex and concave curved surfaces to enhance airflow transition and reduce drag, with the inserts secured within cavities to avoid airflow interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional flat rail designs are used to couple walls to the roof, then the structure is simple and easy to manufacture, but aerodynamic efficiency deteriorates due to poor airflow management
Solution Approach 1:
The patent applies curvature to the aerodynamic inserts by providing convex and concave curved surfaces that guide airflow smoothly from the side walls onto the roof. The convex surface faces the side wall and the concave surface faces the roof, creating a curved transition path that reduces turbulence and aerodynamic drag while maintaining manufacturing feasibility through molded plastic components.
2Object-affected harmful factors
If aerodynamic inserts are integrated into upper rails, then aerodynamic efficiency improves through optimized airflow, but device complexity increases
Solution Approach 1:
The patent merges the aerodynamic insert with the upper rail assembly by integrating the insert into the rail structure. The insert is received within a cavity formed in the upper rail and secured through attachment features, creating a combined component that improves aerodynamics without requiring separate complex assemblies. The end connector also integrates multiple functions including securing the insert and providing aerodynamic coverage.
Solution Approach 2:
The upper rail assembly serves multiple functions: it structurally couples the side wall to the roof, provides a cavity to house the aerodynamic insert, and the insert itself serves as both a structural element and an aerodynamic flow guide. The end connector similarly provides both structural attachment and aerodynamic sealing functions.
3Ease of manufacture
If connection points are exposed on the surface of aerodynamic inserts, then assembly is simplified, but airflow is disrupted causing increased drag
Solution Approach 1:
The aerodynamic insert is nested within a cavity formed in the upper rail structure, with the cavity walls surrounding the insert. Attachment features such as ribs and recesses allow the insert to be secured within the cavity while keeping all connection points hidden from the external airflow path. The end connector further nests over the insert to provide additional aerodynamic coverage.
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 design significantly improves aerodynamic efficiency by optimizing airflow, resulting in reduced fuel consumption and operating costs by minimizing aerodynamic drag across the trailer's surface.
Implementation Method 1
Each of the aerodynamic inserts is configured to direct airflow from the front wall or the plurality of side walls onto the roof
Implementation Method 2
utilizing convex and concave curved surfaces to enhance airflow transition and reduce drag
Data Source
AI summary
A cargo transport includes a cargo area defined by a front wall, a plurality of side walls, and a roof. A front upper rail is disposed between the front wall and the roof and configured to couple the front wall to the roof. A plurality of side upper rails is disposed between the plurality of side walls and the roof and configured to couple the plurality of side walls to the roof. A front aerodynamic insert is coupled to the front upper rail, and a plurality of side aerodynamic inserts is coupled to the plurality of side upper rails. Each of the aerodynamic inserts is configured to direct airflow from the front wall or the plurality of side walls onto the roof.