Air Compressor Clutch Control for Demand-Based Engine Loading
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Solution Overview
Problem
Multi-function machines, such as engine-driven welders with integrated air compressors, often face inefficiencies due to engines being undersized to handle combined loads, leading to suboptimal performance in welding, auxiliary power, and compressed air capabilities.
Innovation Solution
Implementing a system with a first air pressure sensor, a proportional air inlet valve, and a controller that adjusts engine speed and disengages the clutch when no compressed air load is required, allowing for efficient regulation of air pressure and engine operation based on demand, thereby optimizing the use of resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the engine is sized to handle the combined output of air compressor, weld output, and auxiliary output, then the multi-function machine can provide all capabilities, but the engine becomes oversized and inefficient when not all functions are used simultaneously
Solution Approach 1:
The clutch assembly is dynamically engaged or disengaged based on real-time detection of compressed air tool usage, allowing the air compressor to be connected to or disconnected from the engine output. This dynamic configuration enables the engine to efficiently power only the required functions at any given time, rather than maintaining capacity for all possible functions simultaneously.
Solution Approach 2:
The engine output is segmented into separate functional paths: one path connects to the air compressor via the clutch assembly, and another path connects to the welder and auxiliary power components. This segmentation allows independent control and engagement of different functional modules based on operational requirements.
2Adaptability or versatility
If the clutch remains engaged to provide compressed air capability, then compressed air tools can be used, but the engine continues to run and consume fuel even when no compressed air is needed
Solution Approach 1:
The system incorporates detection mechanisms that monitor whether a compressed air tool is actually connected and actively using compressed air. Based on this feedback, the controller automatically engages or disengages the clutch assembly, ensuring the engine powers the air compressor only when needed, thereby eliminating unnecessary fuel consumption.
3Productivity
If the engine speed is kept high to meet peak demand, then all functions can operate at full capacity, but energy consumption and emissions increase during partial load operation
Solution Approach 1:
The engine speed is dynamically adjusted based on the actual operational demands of the connected functions. When the clutch is disengaged and the air compressor is not needed, the engine operates at lower speeds appropriate for welding and auxiliary power only, thereby reducing emissions and fuel consumption while maintaining the capability to operate at full speed when all functions are required.
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 solution enhances the efficiency and performance of multi-function machines by dynamically adjusting engine speed and air compressor output, ensuring optimal resource allocation and reducing energy consumption and emissions.
Implementation Method 1
a first air pressure sensor configured to measure an outlet air pressure value at an outlet of the air compressor subsystem
Implementation Method 2
a proportional air inlet valve device configured to be adjusted to regulate the outlet air pressure value
Implementation Method 3
a clutch assembly or clutch mechanism configured to be engaged to enable air compression, and configured to be disengaged by the controller
Implementation Method 4
the controller is configured to vary a speed of an engine of the engine driven welding system based on a demand of the air compressor subsystem
Implementation Method 5
the proportional air inlet valve device includes a solenoid valve
Data Source
AI summary
An engine driven welding system having an air compressor subsystem is provided. The system includes a first air pressure sensor to measure an outlet air pressure value at an outlet of the air compressor subsystem. A proportional air inlet valve device is configured to be adjusted to regulate the outlet air pressure value. A controller is configured to record an adjustment value of the proportional air inlet valve device as adjusted. A clutch mechanism is configured to be engaged to enable air compression, and to be disengaged by the controller when the adjustment value of the proportional air inlet valve falls below a first threshold value for a determined period of time. A second air pressure sensor is configured to monitor a second air pressure value, where the clutch mechanism cannot be re-engaged by the controller unless the second air pressure value falls below a second threshold value.