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Simple adaptive air-fuel ratio control of a port injection SI engine with a cylinder pressure sensor
C.Khajorntraidet,K.Ito
0
(Graduate School of Engineering and Science, Shibaura Institute of Technology)
摘要:
The problem of air-fuel ratio (AFR) control of the port injection spark ignition (SI) engine is still of considerable importance because of stringent demands on emission control. In this paper, the static AFR calculation model based on in-cylinder pressure data and on the adaptive AFR control strategy is presented. The model utilises the intake manifold pressure, engine speed, total heat release, and the rapid burn angle, as input variables for the AFR computation. The combustion parameters, total heat release, and rapid burn angle, are calculated from in-cylinder pressure data. This proposed AFR model can be applied to the virtual lambda sensor for the feedback control system. In practical applications, simple adaptive control (SAC) is applied in conjunction with the AFR model for port-injected fuel control. The experimental results show that the proposed model can estimate the AFR, and the accuracy of the estimated value is applicable to the feedback control system. Additionally, the adaptive controller with the AFR model can be applied to regulate the AFR of the port injection SI engine.
关键词:  Spark ignition engine, in-cylinder pressure, simple adaptive control, air-fuel ratio estimation and control
DOI:
Received:October 29, 2014Revised:March 20, 2015
基金项目:
Simple adaptive air-fuel ratio control of a port injection SI engine with a cylinder pressure sensor
C. Khajorntraidet,K. Ito
(Graduate School of Engineering and Science, Shibaura Institute of Technology;Department of Machinery and Control Systems, College of Systems Engineering and Science, Shibaura Institute of Technology)
Abstract:
The problem of air-fuel ratio (AFR) control of the port injection spark ignition (SI) engine is still of considerable importance because of stringent demands on emission control. In this paper, the static AFR calculation model based on in-cylinder pressure data and on the adaptive AFR control strategy is presented. The model utilises the intake manifold pressure, engine speed, total heat release, and the rapid burn angle, as input variables for the AFR computation. The combustion parameters, total heat release, and rapid burn angle, are calculated from in-cylinder pressure data. This proposed AFR model can be applied to the virtual lambda sensor for the feedback control system. In practical applications, simple adaptive control (SAC) is applied in conjunction with the AFR model for port-injected fuel control. The experimental results show that the proposed model can estimate the AFR, and the accuracy of the estimated value is applicable to the feedback control system. Additionally, the adaptive controller with the AFR model can be applied to regulate the AFR of the port injection SI engine.
Key words:  Spark ignition engine, in-cylinder pressure, simple adaptive control, air-fuel ratio estimation and control