Adaptive Engine Speed Control for Load Transients
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Solution Overview
Problem
Internal combustion engine speed control systems face inefficiencies and increased fuel consumption due to sudden load changes, leading to speed overshooting and undershooting, which are not effectively managed by existing adaptive accelerator pedal based speed control systems.
Innovation Solution
A control system that dynamically adjusts the ABS reference speed based on detected load changes, using a controller to identify unloading conditions and modify the speed demand, thereby preventing overshooting and undershooting by temporarily adjusting the engine speed in response to sudden torque demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If adaptive accelerator pedal based speed control is used, then engine speed control is improved, but speed overshooting and undershooting during sudden load changes occurs
Solution Approach 1:
The controller detects load changes before they cause significant speed deviations and proactively adjusts the speed demand accordingly. By detecting the load change condition and modifying the speed demand in advance, the system prevents overshooting and undershooting from occurring in the first place, rather than reacting after the problem arises.
Solution Approach 2:
The system continuously monitors load parameters and engine speed, using this feedback to dynamically adjust the speed demand. When a load change is detected, the controller modifies the speed demand based on the detected change, creating a closed-loop control system that responds to actual operating conditions and maintains speed stability.
2Use of energy by moving object
If engine speed is controlled to match torque demands, then fuel efficiency is improved, but response to sudden load changes causes inefficiency
Solution Approach 1:
By detecting load changes early and proactively adjusting the speed demand before significant speed deviations occur, the system maintains the engine in its optimal efficiency range during transient load changes. This prevents the engine from operating in inefficient regions during sudden load transitions, thereby maintaining fuel efficiency while improving response capability.
3Reliability
If ABS reference speed is dynamically adjusted, then speed overshooting is prevented, but control system complexity increases
Solution Approach 1:
The system uses feedback from load parameter sensors to automatically adjust the ABS reference speed. The controller continuously monitors load conditions and modifies the speed demand accordingly, creating an adaptive control system that maintains speed stability without requiring complex manual intervention or additional hardware components.
Data Source
AI summary
A method of controlling speed of an internal combustion engine is disclosed. The method includes receiving a load parameter input. The method also includes determining a requested speed demand and detecting a change in load based on the load parameter input. The method also includes determining a modified speed demand based on the detected change in load, and modifying the requested speed demand to the modified speed demand.