Fuzzy modelling techniques applied to an air/fuel ratio control system

Maintaining low exhaust emissions on a turbocharged, natural gas engine through the speed and load range requires precise control of the air–fuel ratio. Changes in ambient conditions or fuel heating value will cause the air–fuel ratio to change substantially. By combining air–gas pressure with preturbine temperature control, the air–fuel ratio can be maintained regardless of changes in the ambient conditions or the fuel’s heating value. Design conditions and operating results are presented for an air–fuel controller for a turbocharged engine.

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Comparison of SVM-Fuzzy Modelling Techniques for System Identification

Lecture Notes in Computer Science - MICAI 2005: Advances in Artificial Intelligence ◽

10.1007/11579427_50 ◽

2005 ◽

pp. 494-503

Author(s):

Ariel García-Gamboa ◽

Miguel González-Mendoza ◽

Rodolfo Ibarra-Orozco ◽

Neil Hernández-Gress ◽

Jaime Mora-Vargas

Keyword(s):

System Identification ◽

Fuzzy Modelling ◽

Modelling Techniques

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Development of Next-Generation Air-Fuel Ratio Control System, “COSMIC”

10.4271/2002-01-0477 ◽

2002 ◽

Cited By ~ 8

Author(s):

Hajime Hosoya ◽

Hidekazu Yoshizawa ◽

Shigeo Ohkuma ◽

Satoru Watanabe ◽

Hiroshi Okada ◽

...

Keyword(s):

Control System ◽

Next Generation ◽

Fuel Ratio

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A Comparison of Fuzzy Modelling Techniques for Load Forecasting

2007 IEEE International Fuzzy Systems Conference ◽

10.1109/fuzzy.2007.4295382 ◽

2007 ◽

Author(s):

P.R.J. Campbell

Keyword(s):

Load Forecasting ◽

Fuzzy Modelling ◽

Modelling Techniques

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Development and Simulation Using of Energy Saving Combustion Control System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.512-515.1117 ◽

2012 ◽

Vol 512-515 ◽

pp. 1117-1120

Author(s):

Fei Fei Zhang ◽

Guo Liang Guo ◽

Chun Shan Sun ◽

Bao Zhu Liu ◽

Zong Qi Liu

Keyword(s):

Control System ◽

Energy Saving ◽

Computer Control ◽

Control Program ◽

Combustion Control ◽

Dynamic Link Library ◽

Control Programs ◽

Fuel Ratio ◽

Communication Program ◽

Upper Computer

A remotely controlled energy saving combustion control system is developed in this paper. The system includes three parts: upper computer, communication program between upper and lower computer, lower computer control program. Friendly human-machine interface is designed by Labview, which realizes the remote control of PLC; With Visual C, a standard dynamic link library is designed and debugged, by which the serial communication between PC and PLC can be realized; According to the scheme of air-fuel ratio, the control programs are achieved by PLC, which realizes energy saving combustion. The results of experiment in PLC experimental platform shows that the PC can effectively control the PLC .The scheme of air-fuel ratio is similar with the actual situation.

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Hybrid fault tolerant control for air–fuel ratio control of internal combustion gasoline engine using Kalman filters with advanced redundancy

Measurement and Control ◽

10.1177/0020294019842593 ◽

2019 ◽

Vol 52 (5-6) ◽

pp. 473-492 ◽

Cited By ~ 4

Author(s):

Arslan Ahmed Amin ◽

Khalid Mahmood-ul-Hasan

Keyword(s):

Control System ◽

Kalman Filters ◽

Active Fault ◽

Fault Tolerant ◽

Fault Tolerant Control ◽

Internal Combustion ◽

Sensors And Actuators ◽

Triple Modular Redundancy ◽

Fuel Ratio ◽

Modular Redundancy

In this paper, a hybrid fault tolerant control system is proposed for air–fuel ratio control of internal combustion gasoline engines based on Kalman filters and triple modular redundancy. Hybrid fault tolerant control system possesses properties of both active fault tolerant control system and passive fault tolerant control system. As part of active fault tolerant control system, fault detection and isolation unit is designed using Kalman filters to provide estimated values of the sensors to the engine controller in case of faults in the sensors. As part of passive fault tolerant control system, a dedicated proportional–integral feedback controller is incorporated to maintain air–fuel ratio by adjusting the throttle actuator in the fuel supply line in faulty and noisy conditions for robustness to faults and sensors’ noise. Redundancy is proposed in the sensors and actuators as a simultaneous failure of more than one sensor, and failure of the single actuator will cause the engine shutdown. Advanced redundancy protocol triple modular redundancy is proposed for the sensors and dual redundancy is proposed for actuators. Simulation results in the MATLAB Simulink environment show that the proposed system remains stable during faults in the sensors and actuators. It also maintains air–fuel ratio without any degradation in the faulty conditions and is robust to noise. Finally, the probabilistic reliability analysis of the proposed model is carried out. The study shows that the proposed hybrid fault tolerant control system with redundant components presents a novel and highly reliable solution for the air–fuel ratio control in internal combustion engines to prevent engine shutdown and production loss for greater profits.

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