Air-to-fuel ratio control of spark ignition engines using Gaussian network sliding control

Won, Moon; Choi, Seibum B.; Hedrick, J. Karl

doi:10.1109/87.709504

Cited by 52 publications

(4 citation statements)

References 17 publications

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“…5 Air-to-fuel ratio (AFR) control is a third objective, as accurate regulation of AFR is required to achieve proper combustion stability, efficiency, and emission levels. 6 Specifically, there are limits on AFR for a lean-burn natural gas engine to avoid misfire (when AFR is too high) or detonation (when AFR is too low).…”

Section: Introductionmentioning

confidence: 99%

Control design-oriented modeling and µ-synthesis-based robust multivariate control of a turbocharged natural gas genset engine

Qiu

Rayasam

Shaver

et al. 2023

International Journal of Engine Research

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This paper describes a comprehensive framework for the development and validation of a model-based robust multivariate controller, which is used to regulate the gas exchange processes of an advanced turbocharged natural gas genset engine. The natural gas genset engine involved in this study features a multi-input and multi-output structure and is highly nonlinear, making it a challenge for which to design a controller. A control design-oriented model describing the dynamics of the studied engine is first developed and validated, using modeling techniques commonly employed for modeling of turbocharged engines. A novel robust model-based multivariate controller is then synthesized to incorporate the significant coupling between the engine actuators (throttle valve, bypass valve, and fuel valve) and the desired control objectives (engine speed, throttle differential pressure, and air-to-fuel ratio). To verify the effectiveness of the synthesized controller, it is compared to a benchmark production controller using an experimentally-validated simulation model. Simulation results indicate the merits of the synthesized robust multivariate controller in terms of better tracking performance (robust multivariate controller reduces steady-state error of engine speed, throttle differential pressure, and AFR at most by 100%, 58.9%, and 100% respectively, compared to benchmark production controller), faster transient response (robust multivariate controller reduces settling time of engine speed, throttle differential pressure, and AFR at most by 74.5%, 47.8%, and 71.2% respectively, compared to the benchmark production controller), and finer coordination among multiple interacted actuators when faced with multifacted control objectives.

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Section: Introductionmentioning

confidence: 99%

Control design-oriented modeling and µ-synthesis-based robust multivariate control of a turbocharged natural gas genset engine

Qiu

Rayasam

Shaver

et al. 2023

International Journal of Engine Research

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“…In Lee et al, 21 fuzzy logic rules are used to determine the amount of fuel to be injected. Neural network approaches for AFR control in an SI engine have been utilized in Lennox et al 22 and Won et al 23 while SMC has been used for AFR control in Tafreshi et al 24 and Ebrahimi et al 25 In Zope et al, 26 a gain scheduled H ∞ controller is designed to regulate AFR over a large engine operating space.…”

Section: Introductionmentioning

confidence: 99%

Robust model-based switching MIMO air handling control of turbocharged lean-burn SI natural gas variable speed engines

Rayasam

Qiu

Rimstidt

et al. 2022

International Journal of Engine Research

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This paper demonstrates a multiple-input multiple-output (MIMO) controller design framework and a controller switching algorithm for MIMO controllers in their state-space form, which together achieve robust, efficient control of turbocharged lean-burn engines over a wide operating space. The controller design framework requires a linearized plant model, and uses the [Formula: see text]-synthesis and DK-iteration algorithms while considering state and output uncertainties and actuator bandwidths to synthesize a robust [Formula: see text] controller. A controller switching methodology using slow-fast controller decomposition and also incorporating hysteresis at switching points is utilized to smoothly transfer control authority between several MIMO controllers. The approach is applied to a high-fidelity truth-reference GT-Power engine model for a lean-burn natural gas-fueled engine to evaluate the closed-loop controller performance. The multi-tracking control problem targets engine speed, differential pressure across throttle as well as air-to-fuel ratio to achieve satisfactory engine performance and emissions without compressor surge. The engine response obtained using the robust MIMO controller is compared with that obtained using a state-of-the-art benchmark controller to evaluate the additional benefits of the MIMO controller.

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“…Still, the potential of ICE performance improvement has not been exhausted yet. The main lines of working on the problem include structure optimization [11], developing new methods of control [12,13] and the use of alternative fuels [14][15][16]. Studying gas dynamic properties of an ICE intake manifold is essential for achievement of a high level of energy saving and efficiency of the ICE operating cycle.…”

Section: Introductionmentioning

confidence: 99%

ICEs as Part of Mobile Units: Efficiency Improvement

Pshikhopov¹,

Beresnev²,

Beresnev³

2015

AMM

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Paper considers problem of increase in key indicators of the internal combustion engines which are used as a part of a wide range of mobile objects, including motor transport surface, underwater and aircrafts. Approach to the solution of a problem of development of the optimum form of an intake system of the engine providing increase in filling of cylinders with fuel and air mix and uniform distribution of air on cylinders is offered. Besides, the requirement of symmetry in time that means a need of air intake from a throttle to the inlet valve of each cylinder for identical amount of time is put. The results of computing tests of the developed form of an intake collector confirming compliance to the developed model to the given requirements are presented. Model sample intended for installation on small-capacity atmospheric 4-cylinder IC engine is made on the base of 3d-model. Need of modification of the software of a control system of the engine for achievement of the maximum return at tests of a model sample is proved. Corresponding changes are described, comparison charts of adjusting parameters are given. Experimental stand for carrying out natural tests was assembled and used to get the external high-speed characteristic of the engine when using a regular intake collector and intake collector of the developed form. The results of tests that clearly demonstrate increase in power and a torque of the engine are given.

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Air-to-fuel ratio control of spark ignition engines using Gaussian network sliding control

Cited by 52 publications

References 17 publications

Control design-oriented modeling and µ-synthesis-based robust multivariate control of a turbocharged natural gas genset engine

Control design-oriented modeling and µ-synthesis-based robust multivariate control of a turbocharged natural gas genset engine

Robust model-based switching MIMO air handling control of turbocharged lean-burn SI natural gas variable speed engines

ICEs as Part of Mobile Units: Efficiency Improvement

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