Dual Air Dryer Control for Continuous Commercial Vehicle Air Supply
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Solution Overview
Problem
Conventional commercial vehicle compressed air treatment systems with a single air drying cartridge require intermittent supply and regeneration operations, leading to interruptions in compressed air supply, while twin tower systems with two cartridges only provide partial airflow during operation.
Innovation Solution
A compressed air treatment system with two air drying cartridges allows independent control of regeneration mode for one cartridge relative to the supply mode of the other, using electronic control units and solenoid valves to manage pneumatic connections, enabling flexible and continuous air supply by adjusting regeneration times and air flows based on demand and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single air drying cartridge is used in conventional systems, then the device complexity is reduced, but the compressed air supply must be interrupted during regeneration operation
Solution Approach 1:
The system divides the air drying function into two separate cartridges (first and second air drying cartridges) operating in parallel. One cartridge handles supply operation while the other performs regeneration, allowing continuous compressed air supply without interruption. This segmentation resolves the contradiction by maintaining reliability through redundancy while keeping each individual cartridge relatively simple.
2Reliability
If two air drying cartridges are used in twin tower systems to ensure continuous supply, then the continuous compressed air supply is achieved, but only a partial airflow is available in the compressed air system during operation
Solution Approach 1:
The system dynamically switches between different operational modes: supply mode where one cartridge dries air for the system, regeneration mode where the other cartridge is regenerated, and a combined mode where both cartridges can supply dried air simultaneously. This dynamic operation allows the system to maximize compressed air flow availability while maintaining continuous supply, resolving the productivity limitation of traditional twin tower systems.
3Reliability
If regeneration operation is performed in twin tower systems, then the desiccant is regenerated, but the compressor must be activated and deactivated which complicates control and reduces service life
Solution Approach 1:
The system enables the compressor to operate continuously by coordinating the two air drying cartridges such that one is always in supply mode while the other undergoes regeneration. This eliminates the need to repeatedly start and stop the compressor, simplifying control logic and extending compressor service life while maintaining effective desiccant regeneration.
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
This system ensures continuous compressed air supply by minimizing regeneration disruptions, optimizing air flow distribution, and extending compressor service life through intelligent control of air drying cartridge operations.
Implementation Method 1
the desiccants used in conventional air drying cartridges have only a limited capacity to absorb moisture
Implementation Method 2
using electronic control units and solenoid valves to manage pneumatic connections
Data Source
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AI summary
The invention relates to an air treatment device (1) in which a compressor (2) can alternatively supply two air drying cartridges (15, 16). While, according to the prior art, the regeneration operation of the air drying cartridge (15), which is not used in supply mode and is not connected to the compressor (2), takes place simultaneously with the supply operation of the other cartridge (16), the invention proposes to control the regeneration operation of this air drying cartridge (15) independently of the supply operation of the other air drying cartridge (16).