Rectifying Device for Vehicle Underbody Turbulence Management
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Solution Overview
Problem
Vehicle body vibration caused by aerodynamic pressure fluctuations near the underside of a vehicle is not effectively addressed by existing rectifying devices, which often require large and costly components.
Innovation Solution
A rectifying device comprising front and rear flaps disposed along the vehicle width direction, positioned to manage turbulence generated by the rear suspension's lower links, with the rear flap located centrally to intercept and redirect low-frequency pressure fluctuations, thereby reducing vehicle body pitching vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a large-sized rectifying member is provided to suppress vehicle body vibration, then vibration suppression performance is improved, but weight and cost increase
Solution Approach 1:
The rectifying device is divided into multiple small flaps (first flaps and second flaps) distributed across the underside of the vehicle body, rather than using a single large rectifying member. Each flap independently manages turbulence in its local region, collectively achieving vibration suppression while minimizing weight
Solution Approach 2:
The invention extracts only the essential function of turbulence management from large rectifying members, implementing it through small, strategically positioned flaps that intercept and redirect low-frequency pressure fluctuations without the excess weight and cost of comprehensive coverage
2Object-affected harmful factors
If a large-sized rectifying member is provided to suppress vehicle body vibration, then vibration suppression performance is improved, but cost increases
Solution Approach 1:
The rectifying device is divided into multiple small flaps (first flaps and second flaps) distributed across the underside of the vehicle body, rather than using a single large rectifying member. Each flap independently manages turbulence in its local region, collectively achieving vibration suppression while minimizing weight
Solution Approach 2:
The invention extracts only the essential function of turbulence management from large rectifying members, implementing it through small, strategically positioned flaps that intercept and redirect low-frequency pressure fluctuations without the excess weight and cost of comprehensive coverage
3Object-affected harmful factors
If the rectifying device manages turbulence near lower links, then aerodynamic performance is improved, but device complexity increases
Solution Approach 1:
The flaps are positioned at specific locations where turbulence generation is most problematic (near the lower links of rear suspension), concentrating rectifying action at critical points rather than distributing it uniformly, thus achieving effective turbulence management with minimal structure
Solution Approach 2:
Instead of trying to prevent turbulence generation at its source, the invention allows turbulence to form and then uses the second flaps to intercept and redirect the low-frequency pressure fluctuations back toward the vehicle body, inverting the conventional approach to turbulence management
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 device suppresses vehicle body vibrations by redirecting and dissipating low-frequency turbulence, improving riding comfort without the need for large, heavy rectifying members, thus achieving effective aerodynamic rectification with a simple configuration.
Implementation Method 1
air current flowing along the floor surface of the vehicle is separated at a suspension arm (lower link) of a rear suspension projecting downward from the floor, to become turbulence accompanying pressure fluctuation with a relatively low frequency
Implementation Method 2
air current flowing along the floor surface of the vehicle is separated at a suspension arm (lower link) of a rear suspension projecting downward from the floor, to become turbulence accompanying pressure fluctuation with a relatively low frequency
Data Source
AI summary
A rectifying device includes: at least one front rectifying member that is disposed adjacent to projecting components on a rear side of a vehicle with respect to the projecting components to extend substantially along a vehicle width direction and project downward; and a rear rectifying member that is disposed at a center in the vehicle width direction on the rear side of the vehicle with respect to the front rectifying member to extend substantially along the vehicle width direction and project downward. The projecting components are disposed to at least partly project from an underside part of a vehicle body and provided as a pair apart from each other in the vehicle width direction.