Swingable Activated Carbon Filter Suspension for Vibration Analysis
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Solution Overview
Problem
Existing filter arrangements in vehicles with activated carbon filters for hydrocarbon emission control experience undefined or unanalyzable vibrations due to uneven spring element expansion, affecting the determination of volumetric efficiency and regeneration accuracy.
Innovation Solution
A spring-mounted filter arrangement with a sensor unit to measure and stimulate vibrations about a fixed axis of rotation, allowing for unambiguous vibration analysis and calculation of filter weight, enabling precise determination of filling degree and adaptive engine actuation for regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the activated carbon filter is swingably suspended by spring elements on both sides, then the filter can be regenerated by the internal-combustion engine, but the vibrations become undefined and unanalyzable when spring elements expand unevenly
Solution Approach 1:
The filter suspension system is segmented into a primary support structure and a secondary swingable mounting for the activated carbon filter. This segmentation allows the filter to swing independently about a fixed axis while maintaining stable primary support, resolving the contradiction between enabling regeneration swing motion and maintaining vibration analyzability.
Solution Approach 2:
A fixed axis of rotation acts as an intermediary element between the spring-mounted suspension and the filter housing. This intermediary provides a stable reference point for vibration analysis while allowing the necessary swing motion for regeneration, eliminating the undefined vibrations caused by direct asymmetric spring expansion.
2Measurement precision
If the filter weight is determined through vibration analysis, then the filling degree can be calculated for optimized regeneration, but the vibrations must be unambiguous and clearly analyzable
Solution Approach 1:
The system transitions from static spring expansion to dynamic swingable motion about a fixed axis. This dynamic configuration allows controlled vibration patterns that are consistently analyzable for weight determination while maintaining the ability to perform regeneration operations.
Solution Approach 2:
The suspension system parameters are changed from fixed spring expansion to swingable motion about a fixed axis. This parameter change creates consistent, analyzable vibration patterns that enable precise weight determination through vibration analysis while maintaining regeneration capability.
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
Ensures clear and analyzable filter vibrations, allowing for precise regeneration and reduced CO2 emissions by optimizing filter operation and minimizing interference with engine performance.
Implementation Method 1
The filter arrangement according to the invention comprises a spring-mounted suspension of the filter in the vehicle such that the filter is suspended swingably about a vehicle-fixed axis of rotation
Implementation Method 2
a sensor unit is provided which is designed for determining the weight of the filter... the sensor unit is designed for measuring a vibration of the filter
Implementation Method 3
an activated carbon filter is disposed between the tank and the atmosphere... This activated carbon filter absorbs the gaseous hydrocarbons from the tank ventilation system
Implementation Method 4
The regeneration takes place by way of the internal-combustion engine driving the vehicle, which internal-combustion engine generates a vacuum and can thereby take in air from the environment through the activated carbon filter
Implementation Method 5
a sensor unit is provided which is designed for determining the weight of the filter... allowing for unambiguous vibration analysis
Data Source
AI summary
A filter arrangement of a vehicle includes a filter, preferably an active carbon filter, a sprung suspension for the vibrational mounting of the filter in the vehicle, a sensor unit for determining a variable corresponding to the current weight of the filter from a vibrational movement of the filter, and an analyzing unit for calculating a filling degree of the filter from the filter weight determined, taking the empty weight of the filter into account. The filter is suspended such that the filter can vibrate about a rotational axis fixed to the vehicle.