Vehicle Downforce Restrictor Using Pneumatic Pressure Differential
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Solution Overview
Problem
Existing vehicle downforce systems rely on aerodynamic surfaces that increase drag and downforce magnitude is speed-dependent, limiting grip and traction at low speeds.
Innovation Solution
A downforce system using a restrictor and a dedicated pressure source to generate a pressure differential, independent of vehicle speed, with a dust and debris removal system to enhance safety and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If aerodynamic surfaces (aerofoils) are used to generate downforce, then downforce magnitude can be increased, but aerodynamic drag increases and downforce becomes speed-dependent
Solution Approach 1:
The patent uses a pressure source (pneumatic system) to generate a pressure differential across a restrictor, creating downforce through controlled air flow rather than aerodynamic lift. This allows downforce generation independent of vehicle speed and reduces reliance on high-speed aerodynamic effects that create drag
Solution Approach 2:
The system changes the physical parameter used for downforce generation from aerodynamic pressure (speed-dependent) to controlled pneumatic pressure (speed-independent). By using a pressure source to create a pressure differential, the system decouples downforce magnitude from vehicle speed, allowing consistent downforce across various operating conditions
2Speed
If aerodynamic surfaces are used to generate downforce, then downforce can be generated at high speeds, but downforce magnitude is relatively small at low speeds
Solution Approach 1:
The pneumatic system with a pressure source can generate downforce at any vehicle speed by actively controlling the pressure differential. Unlike passive aerodynamic surfaces that require airflow to generate downforce, the active pneumatic system can create the necessary pressure difference even when the vehicle is stationary or moving slowly
Solution Approach 2:
The system transitions from a passive aerodynamic approach (where downforce is a byproduct of vehicle motion) to an active control system that can dynamically adjust downforce generation regardless of vehicle speed. The pressure source can be activated at any speed to maintain adequate downforce levels
3Speed
If a pressure source is used to generate downforce, then downforce can be generated at low speeds, but the system complexity increases
Solution Approach 1:
The patent employs a pressure source connected to a restrictor to create a controlled pressure differential. This pneumatic approach, while adding components, provides a relatively simple and reliable method for generating downforce at low speeds compared to complex active aerodynamic systems
Solution Approach 2:
The system focuses the pressure differential effect at a specific location (across the restrictor) to generate downforce. By concentrating the pneumatic action at a key point rather than requiring complex system-wide adjustments, the implementation remains relatively simple while achieving the desired low-speed downforce
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
Improves vehicle grip and stability across various speeds by generating consistent downforce, reducing the risk of slipping and enhancing handling and safety.
Implementation Method 1
a pressure source configured to generate a pressure differential across the restrictor, in order to generate a downforce
Data Source
AI summary
A downforce system for a vehicle includes: a restrictor configured to restrict a flow of air into a region that is defined at least in part by the restrictor and a ground surface, a rim disposed on the restrictor and configured to form at least a partial seal with the ground surface; a dedicated pressure source disposed outside the restrictor and connected to the restrictor via an air flow path, the pressure source being configured to generate a pressure differential across the restrictor; and a dust and debris removal system configured to prevent dust and debris from exiting the downforce system via the air flow path. By generating a pressure differential across the restrictor, a downforce which acts on the vehicle may be generated. The downforce may result in an improved grip or traction of the vehicle, which may improve handling and safety of the vehicle.