Adaptive controller with delay compensation for Air-Fuel Ratio regulation in SI engines

Kahveci, Nazli E.; Janković, Mrdjan

doi:10.1109/acc.2010.5530525

Cited by 25 publications

(19 citation statements)

References 19 publications

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“…The external reference signal is a square wave as in [10]. This square wave signal might come from cycling the precatalyst AFR across the stoichiometric value based on relay feedback from a relay-type post-catalyst Heated Exhaust Gas Oxygen (HEGO) sensor [19].…”

Section: Adaptive Imc In Discrete-timementioning

confidence: 99%

“…The closed-loop system including the The path from the fuel injectors to the AFR sensor in SI engines can be approximated by a series connection of a first-order lag and a time delay as proposed in [18]. A first-order model of the AFR path is verified through experiments run at 1000 rpm, 0.16 load in closed-loop with a PI controller in [10] where the comparison with the model output is demonstrated for an AFR disturbance generated by a step change in the amount of injected fuel by 27 %. Accordingly, the model of the AFR path is…”

Section: Adaptive Imc In Discrete-timementioning

confidence: 99%

“…An adaptive controller with delay compensation including a Smith Predictor is proposed for AFR regulation in SI engines in [10]. IMC is applied to AFR control problem formulated in continuous-time in [11] where the parameters of the internal model and the parameters of the controller are sequentially tuned by running a gradient-based minimization procedure similar to the Iterative Feedback Tuning (IFT) structure in [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Air-fuel ratio regulation using a discrete-time internal model controller

Kahveci

Impram

Genç

2014

17th International IEEE Conference on Intelligent Transportation Systems (ITSC)

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As the transportation systems become increasingly complex and crowded, more strict standards are proposed to reduce the levels of emissions produced by motor vehicles and hence the negative effects these emissions have on public health and the environment. The efficiency of three-way catalysts typically employed in Spark Ignition (SI) engines depends primarily on the Air-Fuel Ratio (AFR) regulation performance. We implement an Internal Model Controller (IMC) combined with an adaptive law in discrete-time and use this structure to address the AFR control problem despite the presence of parametric uncertainties.

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Section: Adaptive Imc In Discrete-timementioning

confidence: 99%

Section: Adaptive Imc In Discrete-timementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Air-fuel ratio regulation using a discrete-time internal model controller

Kahveci

Impram

Genç

2014

17th International IEEE Conference on Intelligent Transportation Systems (ITSC)

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show abstract

“…A backstepping controller [7] was designed for the AFR regulation to solve the problem of unknown input time delay and unknown parameters in the plant. Linear parameter-varying control [8,9], sliding mode control [10,11], and a Smith predictor [12] were introduced to improve the AFR regulation performance. As it is hard to describe the exact AFR path dynamic with certain models and parameters, using adaptive control [1,12,13] for the AFR regulation aroused interest regarding the control issue.…”

Section: Introductionmentioning

confidence: 99%

“…Linear parameter-varying control [8,9], sliding mode control [10,11], and a Smith predictor [12] were introduced to improve the AFR regulation performance. As it is hard to describe the exact AFR path dynamic with certain models and parameters, using adaptive control [1,12,13] for the AFR regulation aroused interest regarding the control issue. A new method of AFR calculation was carried out in Reference [14] using fast response CO and CO 2 sensors.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Air-Fuel Ratio Regulation for Port-Injected Spark-Ignited Engines Based on a Generalized Predictive Control Method

et al. 2019

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The accurate air-fuel ratio (AFR) control is crucial for the exhaust emission reduction based on the three-way catalytic converter in the spark ignition (SI) engine. The difficulties in transient cylinder air mass flow measurement, the existing fuel mass wall-wetting phenomenon, and the unfixed AFR path dynamic variations make the design of the AFR controller a challenging task. In this paper, an adaptive AFR regulation controller is designed using the feedforward and feedback control scheme based on the dynamical modelling of the AFR path. The generalized predictive control method is proposed to solve the problems of inherent nonlinearities, time delays, parameter variations, and uncertainties in the AFR closed loop. The simulation analysis is investigated for the effectiveness of noise suppression, online prediction, and self-correction on the SI engine system. Moreover, the experimental verification shows an acceptable performance of the designed controller and the potential usage of the generalized predictive control in AFR regulation application.

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Adaptive air–fuel ratio control scheme and its experimental validations for port‐injected spark ignition engines

Jiao

Zhang

Shen

et al. 2013

Adaptive Control & Signal

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To maintain the stoichiometric air-fuel ratio (AFR), this paper presents a model-based adaptive AFR control scheme for port-injected spark ignition engines. The utilized mean-value model in control design accounts for the impingement and the evaporation process of the injected fuel on the walls and calculates on the uncertainties in the dynamics of the intake manifold and crankshaft rotation. A fueling controller with adaptive update laws is derived for estimating the uncertain parameters related to inaccuracies in air flow and fuel delivery into the cylinders and engine torque production, which is implemented by utilizing engine speed, manifold pressure and temperature, air mass flow rate at the throttle, and the universal exhaust gas oxygen (UEGO) sensor information, without knowledge of the fuel flow mass. Theoretical analysis shows that the proposed strategy is able to regulate the AFR against the parameter uncertainties. Moreover, both simulation and experiment on an engine test bench demonstrate the capability of the adaptive controller to recover the performance and robustness properties of the control system in the presence of various operating conditions and uncertainties including air path and fuel path perturbations and load torque disturbance as well.

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Adaptive controller with delay compensation for Air-Fuel Ratio regulation in SI engines

Cited by 25 publications

References 19 publications

Air-fuel ratio regulation using a discrete-time internal model controller

Air-fuel ratio regulation using a discrete-time internal model controller

Adaptive Air-Fuel Ratio Regulation for Port-Injected Spark-Ignited Engines Based on a Generalized Predictive Control Method

Adaptive air–fuel ratio control scheme and its experimental validations for port‐injected spark ignition engines

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