Lean-burn air-fuel ratio control using genetic algorithm-based PI controller

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dc.contributor.authorCoşkun, Serdar
dc.contributor.authorKöse, Ercan
dc.date.accessioned2025-03-16T12:43:02Z
dc.date.available2025-03-16T12:43:02Z
dc.date.issued2021
dc.departmentTarsus Üniversitesi
dc.description.abstractMaximizing the fuel economy while lowering exhaust emissions highly depend on precise air-fuel ratio (AFR) control. The major challenge in the control of AFR is the time-varying delay, which is an inherent reason for performance degradation and instability. For analysis, the time delay is approximated by Padé approximation, leading to a non-minimum phase system that exhibits the difficulty of controlling due to its zeroes in the right half side of the s-plane. Moreover, dealing with uncertainties in fuel-path dynamics and minimizing the effect of external disturbances are key goals in the minimization of harmful emissions and maximization of fuel economy. This study puts forward an AFR control strategy in lean-burn spark-ignition (SI) engines by proposing a genetic algorithm (GA)-based proportional-integral (PI) control technique. The proposed PI controller aims at dealing with the aforementioned design challenges. The PI controller gains, namely, proportional (K_p), integral (K_i) gains are obtained with the proposed GA algorithm based on minimization of an objective function. The GA-based PI controller’s performance is analyzed with several methods in time-domain study. According to the obtained results, it has been revealed that the proposed GA-based PI controller improves the reference air-fuel ratio tracking performance in the existence of the time-varying delays in the closed-loop system, exhibiting good disturbance rejection properties, and is robust against system uncertainties. Thus, it can be effectively used for the accurate regulation of AFR under various operating conditions in SI engines.
dc.identifier.doi10.18245/ijaet.824507
dc.identifier.endpage134
dc.identifier.issn2146-9067
dc.identifier.issue3
dc.identifier.startpage126
dc.identifier.urihttps://doi.org/10.18245/ijaet.824507
dc.identifier.urihttps://hdl.handle.net/20.500.13099/488
dc.identifier.volume10
dc.language.isoen
dc.publisherMurat CİNİVİZ
dc.relation.ispartofInternational Journal of Automotive Engineering and Technologies
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_DergiPark_20250316
dc.subjectAir-fuel ratio control
dc.subjectgenetic-algorithm
dc.subjectPI control
dc.subjecttime-delay systems
dc.subjectnon-minimum phase systems
dc.titleLean-burn air-fuel ratio control using genetic algorithm-based PI controller
dc.typeArticle

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