Electrostatic Wheel Particulate Capture Near the Tire Contact Point
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Solution Overview
Problem
Modern vehicle tyres and rail vehicles produce significant particulate emissions through wear, contributing to air pollution and health risks, with existing technologies failing to address these non-exhaust sources effectively.
Innovation Solution
A particulate collecting device with an electrostatic filter unit is attached to vehicles to capture particulates by electrostatic attraction, positioned near the wheel or tyre to collect emissions at their source, utilizing airflow dynamics and a charging circuit to enhance collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrostatic filter units are mounted close to the wheel to capture particulates at the source, then collection efficiency is improved, but device complexity and power consumption increase
Solution Approach 1:
The electrostatic filter unit is divided into multiple collector electrodes arranged in series, each contributing to the overall electrostatic field. This segmentation allows the system to achieve high collection efficiency through cumulative effect while keeping individual electrode complexity manageable and enabling modular design.
Solution Approach 2:
The collector electrodes are charged to create equipotential regions that effectively capture charged particulates. By maintaining appropriate voltage potentials across the electrodes, the system maximizes electrostatic attraction force on particulates passing through the wheel vicinity without requiring excessive complexity in electrode configuration.
2Productivity
If electrostatic filter units are mounted close to the wheel to capture particulates at the source, then collection efficiency is improved, but power consumption increases
Solution Approach 1:
The filter unit captures particulates partially through electrostatic attraction rather than attempting to capture all particulates. The system is designed to capture the majority of charged particulates in the flow path without requiring excessive voltage or continuous high-power operation, achieving satisfactory collection efficiency with moderate power consumption.
Solution Approach 2:
The charging circuit operates periodically to recharge the collector electrodes rather than maintaining continuous high-voltage operation. This periodic charging approach reduces average power consumption while maintaining effective particulate collection during the charged intervals when particulate flow is present.
3Productivity
If collector electrodes are charged to attract particulates, then particulate capture is improved, but loss of charged particulates through repulsion or discharge increases
Solution Approach 1:
The charging circuit incorporates feedback control to monitor the charge state of collector electrodes and adjust charging parameters accordingly. This feedback mechanism prevents overcharging that would cause particle repulsion and minimizes charge discharge losses by maintaining optimal electrode potential for continuous particulate attraction.
Solution Approach 2:
The system periodically discharges accumulated particulates from the collector electrodes through controlled discharge mechanisms, recovering the electrostatic charge energy while removing captured particulates. This cycle of capture and controlled discharge prevents charge saturation and maintains high capture efficiency over extended operation.
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 effectively captures tyre and wheel particulates, preventing environmental release and allowing for controlled disposal or recycling, while reducing power consumption and maintaining vehicle performance.
Implementation Method 1
The filter unit may be configured to collect or capture charged particulates in the flow. The electrostatic filter unit may comprise one or more electrostatically chargeable collector electrodes for attracting the particulates (in the flow) to the or each collector electrode when charged to collect or capture the particulates.
Implementation Method 2
The charging circuit may be connectable to a power source of the device and/or the vehicle and operable to charge the one or more collector electrodes.
Data Source
AI summary
A particulate collecting device (100) attachable to a vehicle for collecting or capturing particulates that are released from a tyre or a wheel (W) of the vehicle through wear on or against a driving surface (S) when the vehicle is driven on the driving surface. The device comprises an electrostatic filter unit (110) mountable in an operative position in close proximity to the tyre or the wheel of the vehicle for receiving a flow of particulates (FI) from a contact point (CP) between the tyre or wheel and the driving surface. The filter unit (110) is configured to collect or capture the particulates in the flow by electrostatic attraction.