Compressed Air Supply Control for Vehicle Fuel Efficiency
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Solution Overview
Problem
Conventional methods for supplying compressed air in commercial vehicles lead to high fuel consumption due to unnecessary operation of the compressor, resulting from inefficient air pressure management and request signaling.
Innovation Solution
The method calculates the required pressure value based on current conditions and additional functions, allowing for precise control of compressor actuation, reducing fuel consumption by optimizing air pressure and volume requests through CAN messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compressor is operated to supply compressed air for level regulation and other functions, then the compressed air requirement is met, but fuel consumption increases due to unnecessary operation
Solution Approach 1:
The control device calculates the required pressure value in advance based on the vehicle state and additional functions before actually requesting compressed air. This preliminary calculation allows the system to determine the exact pressure needed, avoiding unnecessary compressor operation and reducing fuel consumption while ensuring reliable compressed air supply when needed.
Solution Approach 2:
The system dynamically adjusts the requested pressure value based on real-time vehicle state and additional functions. Instead of using a fixed or overly conservative pressure request, the control device continuously adapts the pressure requirement to match actual needs, optimizing the balance between supply reliability and energy consumption.
2Quantity of substance
If the level regulation control device requests compressed air for any function, then the compressed air volume increases, but this leads to unnecessary compressor operation and increased fuel consumption
Solution Approach 1:
The control device performs preliminary calculations to determine the exact compressed air volume and pressure required based on the vehicle state and additional functions before sending the request signal. This advance planning ensures that only the necessary amount of compressed air is requested, preventing unnecessary compressor operation and reducing fuel consumption.
Solution Approach 2:
The system changes the pressure parameter dynamically based on calculated requirements rather than using fixed pressure requests. By adjusting the requested pressure value to match actual needs, the system optimizes compressed air volume delivery and minimizes unnecessary compressor operation, thereby reducing fuel consumption.
3Device complexity
If the compressor is controlled based on simple pressure threshold values, then the control logic is simple, but this results in inefficient compressor operation and high fuel consumption
Solution Approach 1:
The control device performs preliminary calculations of the required pressure value based on vehicle state and additional functions before compressor operation. This advance calculation enables more intelligent compressor control that adapts to actual needs, improving energy efficiency while maintaining manageable control logic complexity through systematic pressure request management.
Data Source
AI summary
The method involves determining compressed air requirements by a level regulating control device (8) of a pneumatic level regulating system that includes multiple air springs (3-6). A response signal (S1) is issued to a controller (2) of compressors (1). The compressors are controlled by the controller to output compressed air based on the response signal. A required compressed air value is determined by the level regulating control device based on performed functions e.g. starting aid regulations, and the required compressed air value in the response signal is conveyed by the control device.