Engine Load Management via Intake Manifold Pressure Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing load management systems for generators and machines fail to effectively reduce engine lug during transient conditions, leading to undesirable output fluctuations and decreased productivity due to sudden changes in load.
Innovation Solution
A load management system comprising a controller that monitors intake manifold pressure and load, calculates a ratio, and initiates a predetermined time period to allow the power source to build up power, determining a transient power value to manage loads and prevent engine lug by gradually increasing power output during sudden load increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the engine immediately responds to sudden load increases, then the power demand is met, but engine lug and speed droop occur
Solution Approach 1:
The controller prepares the engine for load changes by pre-adjusting intake manifold pressure and fuel injection parameters before the actual load demand occurs. This preliminary action allows the engine to build up power gradually, meeting sudden load increases without experiencing lug or excessive speed droop.
Solution Approach 2:
The system dynamically adjusts engine parameters including intake manifold pressure, fuel injection timing, and air-fuel ratio based on real-time load conditions. This dynamic control enables the engine to optimize power delivery while maintaining speed stability during transient operations.
2Reliability
If the engine builds up power gradually to avoid lug, then speed stability is maintained, but response time to load changes increases
Solution Approach 1:
The controller anticipates load changes and begins adjusting engine parameters in advance. By pre-modulating intake manifold pressure and fuel injection, the engine is prepared to deliver power more quickly while still building up gradually enough to avoid lug, thus reducing the effective response time.
Solution Approach 2:
The system rapidly changes key engine parameters such as intake manifold pressure, fuel injection timing, and air-fuel ratio in response to detected load conditions. These parameter changes enable faster power build-up while maintaining control over the rate of increase to prevent engine lug.
3Device complexity
If the controller manages only engine side power, then engine control is simplified, but generator side load fluctuations are not reduced
Solution Approach 1:
The controller implements feedback control by monitoring both engine parameters and generator output, and adjusting engine power delivery based on actual load conditions and output stability requirements. This closed-loop control reduces generator side load fluctuations while maintaining manageable control complexity through integrated sensing and actuation.
Data Source
AI summary
A load management system for reducing engine lug during transient conditions is disclosed. The load management system may include a driven component, a power source configured to drive the driven component, and a controller in communication with the driven component and the power source. The controller may be configured to: monitor a current intake manifold pressure of the power source and a current load of the driven component, calculate a ratio based on the current intake manifold pressure and a steady state intake manifold pressure of the power source, and start a predetermined time period based on the ratio and the current load during which the power source builds up power to respond to the current load.