Compressed Air Supply System Regeneration Control
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Solution Overview
Problem
Conventional compressed air supply systems for commercial vehicles experience excessive loss of compressed air during regeneration phases, leading to energy inefficiencies and over-regeneration of the filter unit, which negates the benefits of shutting off the compressor.
Innovation Solution
An electronic control unit coordinates the shutdown of the compressor and regeneration of the compressed air supply system by using electrically and pneumatically controllable valve units to manage delivery and non-delivery phases, ensuring energy savings and minimizing air loss through strategic control of the delivery line shut-off and drain valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the compressor is shut off during regeneration phases to save energy, then energy consumption is reduced, but compressed air in the delivery line is lost unnecessarily
Solution Approach 1:
The system separates the delivery line from the regeneration process using a shut-off valve, dividing the air system into independent segments. This allows the delivery line to be isolated and preserved while regeneration occurs in the air treatment unit, preventing compressed air loss during energy-saving shutdown phases.
Solution Approach 2:
The shut-off valve closes the delivery line before the compressor is switched off, preserving the compressed air in the delivery line in advance. This preliminary action ensures that when the compressor shuts down for energy savings, the delivered air remains protected and available for immediate use upon restart.
2Reliability
If the filter unit is regenerated in each idle phase of the compressor to maintain air quality, then filtration effectiveness is improved, but excessive compressed air is lost
Solution Approach 1:
The electronic control unit monitors system parameters and intelligently determines when regeneration is actually needed, rather than regenerating in every idle phase. This feedback-based control prevents unnecessary regeneration operations, maintaining air quality while avoiding excessive compressed air loss from frequent regeneration cycles.
Solution Approach 2:
Instead of regenerating the filter in every idle phase (excessive action), the system applies partial action by selectively regenerating only when necessary based on actual air quality requirements and system conditions, optimizing the balance between filtration effectiveness and compressed air conservation.
3Loss of substance
If the delivery line is shut off during regeneration to prevent air loss, then compressed air is preserved, but the system requires additional control valves and coordination
Solution Approach 1:
The electronic control unit serves multiple functions: it controls the compressor shutdown timing, manages the shut-off valve operation, coordinates regeneration timing, and monitors system parameters. This multi-functionality consolidates control logic into a single device, managing the additional valve complexity through integrated electronic control rather than requiring separate mechanical control systems.
Data Source
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AI summary
The invention relates to a compressed air supply system (10) for a utility vehicle, comprising an air dryer unit (12) provided with a filter unit (14), an electrically controllable value unit (18,18') and a pneumatically controllable discharge valve unit (20,20'), a compressor (22) with a coupling (24), which supplies compressed air to the air dryer unit via a delivery pipe (26), a multi-circuit safety valve unit (28) which removes the compressed air from the air dryer unit, and an electrically controllable compressor coupling switch valve unit (30). According to the invention, an electronic control unit (34) which controls, or regulates, the functions of the air dryer unit (12) and the compressor coupling switch valve unit (30) is provided.