Distributed Engine Fuel Control for Cylinder Load Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing engine speed control methods rely on non-distributed fuel demand control, which is inadequate for handling speed control in a distributed manner, particularly during certain conditions where cylinder loads vary.
Innovation Solution
A distributed fuel control system where multiple control units, each controlling a cylinder's fuel injection valve, communicate via a network to share speed measurement data and calculate cylinder-specific load, allowing for precise fuel supply control and load balancing across cylinders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-distributed fuel demand control is used, then the control system is simple, but the engine cannot handle speed control in a distributed manner when cylinder loads vary
Solution Approach 1:
The control system is segmented into multiple independent control units, each responsible for a specific cylinder. Each control unit has its own fuel demand controller that can independently calculate and adjust fuel injection based on local cylinder load conditions, enabling distributed control while maintaining individual cylinder autonomy
Solution Approach 2:
The system implements feedback mechanisms where each control unit receives actual cylinder load information and engine speed data, compares it with reference values, and adjusts fuel injection accordingly. This closed-loop feedback enables adaptive distributed control that responds to varying cylinder loads
2Manufacturing precision
If global fuel demand control is used, then all cylinders take on approximately the same load, but this is inadequate when cylinder loads need to be individually optimized
Solution Approach 1:
Each control unit implements local quality control by calculating fuel demand specifically for its assigned cylinder based on that cylinder's actual load conditions. This allows each cylinder to receive precisely tailored fuel supply optimized for its specific operating conditions rather than a uniform global control approach
Solution Approach 2:
The unified fuel demand control is segmented into multiple independent fuel demand controllers, each dedicated to a specific cylinder. This segmentation enables independent optimization of fuel supply for each cylinder while maintaining overall system coordination through shared engine speed control
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a control of fuel supply to internal combustion engine. Cylinder specific load data (61) is provided to control modules (100) and a load deviation value (122) of said control module (100) is used to generate a cylinder specific speed reference data (132) by affecting a speed reference data (62) with determined load sharing deviation value (122). Fuel supply is controlled based on cylinder specific speed reference data (132).