Input Observer-Based Individual Cylinder Air-Fuel Ratio Control: Modelling, Design and Validation

He, Bin; Shen, Tielong; Kako, Junichi; Ouyang, Minggao

doi:10.1109/tcst.2007.916323

Cited by 37 publications

(16 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The combusted gas of each cylinder is discharged into the corresponding exhaust port and flows to the exhaust confluence point in the exhaust manifold, in which we assume that exhaust gas mixing in the individual exhaust runner can be neglected. Hence, the AFR in the exhaust runner is constant during one engine cycle, and the AFR at the exhaust confluence point in the th engine cycle can be given by [15] (…”

Section: Journal Of Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

Estimation of Individual Cylinder Air-Fuel Ratio in Gasoline Engine with Output Delay

Wang

Liu

2016

Journal of Sensors

View full text Add to dashboard Cite

The estimation of the individual cylinder air-fuel ratio (AFR) with a single universal exhaust gas oxygen (UEGO) sensor installed in the exhaust pipe is an important issue for the cylinder-to-cylinder AFR balancing control, which can provide high-quality torque generation and reduce emissions in multicylinder engine. In this paper, the system dynamic for the gas in exhaust pipe including the gas mixing, gas transport, and sensor dynamics is described as an output delay system, and a new method using the output delay system observer is developed to estimate the individual cylinder AFR. With the AFR at confluence point augmented as a system state, an observer for the augmented discrete system with output delay is designed to estimate the AFR at confluence point. Using the gas mixing model, a method with the designed observer to estimate the individual cylinder AFR is presented. The validity of the proposed method is verified by the simulation results from a spark ignition gasoline engine from engine software enDYNA by Tesis.

show abstract

Section: Journal Of Sensorsmentioning

confidence: 99%

“…In the diesel engines, a nonlinear observer is proposed to estimate the individual cylinder AFR [14]. In [15], a PI compensator is designed to compensate the cylinder-by-cylinder variations, in which an input observer is proposed to estimate individual cylinder AFR.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Individual Cylinder Air-Fuel Ratio in Gasoline Engine with Output Delay

Wang

Liu

2016

Journal of Sensors

View full text Add to dashboard Cite

show abstract

“…Each cross-hair in the plot represents one measurement. The slope of the diagonal solid line is the robustness margin a whose value of 1 was determined before analytically using (10). Clearly, the error for the different imbalance patterns remains below the limiting line.…”

Section: Test Case -Five-cylinder Enginementioning

confidence: 99%

Robustness analysis of a Fourier-based strategy for cylinder-individual air–fuel ratio control

Schick

Onder

Guzzella

2011

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

The paper investigates the robustness of a cylinder-to-cylinder air-fuel ratio controller that aims to reduce the exhaust emissions of automotive gasoline engines with spark ignition. A hardware configuration is considered where one wide-range sensor that measures the air-fuel ratio is mounted downstream of the confluence point of an exhaust manifold whose runners are linked to up to five cylinders. An uncertainty analysis is carried out for the closedloop system with a controller based on Fourier analysis. First, a sensor non-linearity is modelled as an uncertainty and the robustness margins are investigated. With existing observers, the control loop can have a marginal robustness for systems with an even number of cylinders per sensor. For uneven cylinder numbers, however, the loop is always robust. The class of observers considered uses for reconstruction only the necessary number of spectral components of the sensor signal. A modified observer is proposed that also evaluates available redundant spectral information. As a result, the robustness is fully recovered for even numbers of cylinders and further improved for uneven numbers. The robustness is validated on an engine test-bench. Finally, a more complicated case of model uncertainty is investigated where the superimposing signals that originate from the individual cylinders are assumed to be uncertain.

show abstract

“…The control problem for the air-fuel ratio in a spark ignition engine has been a challenging topic in recent years [1][2][3][4]. A crucial factor for the control of the air-fuel ratio is the new air charge, which can be directly estimated by a common mean-value model [5,6].…”

Section: Introductionmentioning

confidence: 99%

Stochastic adaptive air-fuel ratio control of spark ignition engines

Yang

Shen

Jiao

2014

IEEJ Trans Elec Electron Eng

Self Cite

View full text Add to dashboard Cite

This paper investigates the stochastic adaptive control problem of the air-fuel ratio in gasoline engines. A discrete-time dynamic model is introduced to represent the cyclic transient characteristics of the air mass and the fuel mass with consideration of residual gas variation. Then, using the model, a feedback adaptive control law is derived to guarantee the convergence of the regulation error of the air-fuel ratio in the sense of mean square stability, where the unknown perturbation in the cyclic fresh air charge is targeted by the adaptation parameter of the controller. To show its effectiveness, experiments are conducted on a V6 gasoline engine.instead of the mean-value model. Experimental results are given to demonstrate the performance of the proposed control scheme.Jun Yang (Non-member) received the M.S. degree from the

show abstract

Input Observer-Based Individual Cylinder Air-Fuel Ratio Control: Modelling, Design and Validation

Cited by 37 publications

References 14 publications

Estimation of Individual Cylinder Air-Fuel Ratio in Gasoline Engine with Output Delay

Estimation of Individual Cylinder Air-Fuel Ratio in Gasoline Engine with Output Delay

Robustness analysis of a Fourier-based strategy for cylinder-individual air–fuel ratio control

Stochastic adaptive air-fuel ratio control of spark ignition engines

Contact Info

Product

Resources

About