Porous Aerodynamic Mud Flap Design for Drag Reduction
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Solution Overview
Problem
Conventional motor vehicle mud flaps suffer from issues such as sailing, weight-related fuel inefficiency, heat generation leading to premature wear, complex modifications for 'shortie' configurations, and spray-induced visibility issues for following vehicles.
Innovation Solution
A mud flap design featuring a longitudinal plate-like body with a suspension section, quadrant section, and extension section, incorporating arrays of elongate through-openings and ribs in a diagonal pattern to allow airflow and water passage while deflecting debris, and having identical front and back faces for versatile mounting, which reduces drag and eliminates the need for anti-sail brackets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid panel mud flaps are used, then debris blocking is effective, but the mud flaps tend to sail and lift away from the roadway
Solution Approach 1:
The mud flap uses a porous or perforated panel design instead of a solid panel, allowing air to pass through while maintaining debris blocking capability. This reduces the pressure differential that causes sailing while preserving the primary function of deflecting water and roadway debris.
Solution Approach 2:
The panel is segmented into multiple sections with openings distributed throughout, creating a structure that allows controlled airflow passage while maintaining structural integrity and debris blocking function across the entire surface area.
2Stability of the object's composition
If anti-sail brackets are added to restrain sailing, then mud flap positioning is improved, but vehicle weight increases
Solution Approach 1:
The invention eliminates the need for anti-sail brackets by integrating the anti-sail function directly into the mud flap panel structure itself through the porous/perforated design, thereby removing the additional brackets and reducing overall vehicle weight.
3Reliability
If solid section mud flaps are used, then debris blocking is effective, but fuel efficiency is reduced due to increased weight
Solution Approach 1:
The porous or perforated panel design allows the mud flap to be constructed with less material while maintaining debris blocking effectiveness, thereby reducing weight and improving fuel efficiency without sacrificing the primary protective function.
4Reliability
If solid section mud flaps are used, then debris blocking is effective, but heat buildup occurs around tires and brakes
Solution Approach 1:
The porous or perforated panel structure allows air to flow through the mud flap, creating ventilation channels that carry heat away from the tire and brake areas, thereby reducing temperature buildup while maintaining the debris blocking function through the distributed openings.
5Reliability
If conventional mud flaps are used, then debris blocking is effective, but spray is generated affecting visibility
Solution Approach 1:
The porous or perforated panel design allows water to pass through in a controlled manner rather than being forced to flow around the edges, significantly reducing spray generation and improving visibility for following vehicles while maintaining debris blocking through the larger opening structures.
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 design effectively breaks up trailing air vortices, reduces drag, improves fuel efficiency, minimizes spray, and enhances heat venting, eliminating the need for anti-sail brackets and facilitating easier storage and installation.
Implementation Method 1
the invention relates to a mud flap that effectively breaks up trailing air vortex which tends to pull backward out of effective blocking position
Implementation Method 2
a mud flap that has improved aerodynamic properties for less drag and therefore reduces fuel costs
Implementation Method 3
The array of elongate through-openings is defined by alternating recesses and ribs in parallel and longitudinal disposition. Water and air can flow through the recesses
Implementation Method 4
debris larger than the width of the through-openings is deflected by the mud flap
Implementation Method 5
a mud flap that improves venting of excess heat around tires and brakes
Data Source
AI summary
A motor vehicle mud flap is a plate-like body having a suspension section, a quadrant section, and an extension section. The suspension section is adapted for attachment to a mud flap bracket for suspension of the mud flap therefrom. The quadrant section is coupled with the suspension section and has an array of elongate through-openings. The extension section is coupled with the quadrant section and has an array of elongate through-openings. The array of elongate through-openings is defined by alternating recesses and ribs in parallel and longitudinal disposition. Each recess is configured as a pair of opposed elongate shallow recesses fluidly coupled by an elongate through-opening having a width less than the width of each recess. Water and air can flow through the recesses, and debris larger than the width of the through-openings is deflected by the mud flap.