Assessing Boost-Assist Options for Turbocharged Engines Using 1-D Engine Simulation and Model Predictive Control

Darlington, Alexander P. S.; Cieslar, Dariusz; Collings, Nick; Glover, K.

doi:10.4271/2012-01-1735

Cited by 15 publications

(5 citation statements)

References 10 publications

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“…Figure 2 shows characteristics of approximated function compared to literature models. [7][8][9] In an airpath system, the cylinder becomes an integral part which needs to be modeled. The thermodynamic properties and their states are described in next section.…”

Section: Actuator Flowmentioning

confidence: 99%

“…Considering the slow dynamics of pressures and temperatures inside the control volumes, a mean value model of airpath is derived using 1,2,7–10 and adapted to current application. The ninth order dynamic coupled differential equations describing the complex airpath system denoted by ∑ 9 .…”

Section: Modeling Airpath Systemmentioning

confidence: 99%

“…Continuing the development work to solve higher order dynamic airpath models and to control airpath variables, there are various non-RT nonlinear control techniques proposed. 6–11 Adapting these models onto a processor for RT calculations with high accuracy and stability for large uncertainty is still challenging as measured values of the thermodynamic properties are used for airpath control in ECU models.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development and validation of nonlinear dynamic engine airpath models for real-time advanced control application

Kamath

Kopold²,

Venkobarao³

et al. 2021

International Journal of Engine Research

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This paper proposes model reduction techniques for reducing engine airpath models in real-time (RT), for a control oriented application in an engine equipped with high pressure exhaust gas recirculation (EGR-HP) and single stage turbocharger. There are two major challenges addressed by authors: First, reducing the order without compromising the performance in terms of accuracy by decoupling the nonlinear coupled differential equations of airpath system in-order to use them in real-time processor-in-loop control application. A model reduction technique based on different dynamic characteristics between thermodynamic states followed by semi-implicit Euler (SIE) numerical method to solve coupled dynamic multi-input multi-output (MIMO) differential equation models is demonstrated. Second, the authors have proposed a novel method to calculate gas mass flow via compressor, coupled with engine airpath model in real-time. The proposed models of airpath system coupled with turbocharger models for a diesel engine is validated with experimental data to evaluate performance of pressures, temperatures, mass flows at relevant components. The developed airpath model is used for calculating thermodynamic properties in real-time for state of art engine control unit (ECU) in production engine and become basis for feedforward as well as closed loop control of airpath variables for real-time system. Authors further propose to use this modeling approach for calculating airpath system variables for exhaust aftertreatment system, injection system, and for virtualization of sensor values in airpath systems.

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Section: Actuator Flowmentioning

confidence: 99%

Section: Modeling Airpath Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development and validation of nonlinear dynamic engine airpath models for real-time advanced control application

Kamath

Kopold²,

Venkobarao³

et al. 2021

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…The result from each control step is applied at the current control instance and the process repeated at the next operating condition. This approach captures much of the model non-linearity without suffering the difficulties in optimising for a nonlinear model and has been successfully applied to similar problems (for example Darlington et al (2012)).…”

Section: Real-time Mpcmentioning

confidence: 99%

On-Engine Validation of Mean Value Models for IC Engine Air-Path Control and Evaluation

Dickinson

Cieslar

Glover

et al. 2014

IFAC Proceedings Volumes

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“…Recently, the engine energy savings through turbochargers has been studied extensively. Darlington et al 27 used a one‐dimensional (1D) model that studied the injection of compressed air into a turbocharger turbine to increase the shaft torque and performance. Katrasnik et al 28 discussed using an electric motor mounted on the turbocharger shaft or a separated electric supercharger to improve the engine performance.…”

Section: Introductionmentioning

confidence: 99%

Engine performance improvements through turbocharger matching and turbine design

Chen

Zhang

et al. 2022

Energy Science & Engineering

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It is interesting to improve engine system performance with turbocharger technologies. In this study, a systematic simulation for engine and turbocharger matching to provide full utilization of the turbocharger potential and improve the engine performance without sacrificing the emission is developed. A velocity ratio concept was proposed to count the turbocharger performance impacts due to the diameter ratio of compressor and turbine wheels. A design of experiments was used to optimize the turbocharger and engine performance for different turbocharger factors. A better‐matched turbocharger was obtained. A multidisciplinary optimization method was used to design a mixed flow turbine wheel to reduce the turbine velocity ratio at peak efficiency and increase the overall turbocharger efficiency. Results showed that about 0.4% torque improvements and 1.2% reductions in the engine brake‐specific fuel consumption were obtained without making any other changes to the engine. This study demonstrated that systematic simulations for engine systems and considering turbocharger wheel diameter ratio effects could further improve the turbocharged engine system matching and the engine performance.

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Assessing Boost-Assist Options for Turbocharged Engines Using 1-D Engine Simulation and Model Predictive Control

Cited by 15 publications

References 10 publications

Development and validation of nonlinear dynamic engine airpath models for real-time advanced control application

Development and validation of nonlinear dynamic engine airpath models for real-time advanced control application

On-Engine Validation of Mean Value Models for IC Engine Air-Path Control and Evaluation

Engine performance improvements through turbocharger matching and turbine design

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