Modeling and Analysis of a Turbocharged Diesel Engine with Variable Geometry Compressor System

Canova, Marcello; Taburri, Massimiliano; Fiorentini, Lisa; Chiara, Fabio; Wang, Yue-Yun

doi:10.4271/2011-24-0123

Cited by 12 publications

(7 citation statements)

References 21 publications

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“…19 For the current study authors have considered a VGT turbocharger. The mathematical model of turbocharger is described in terms of time derivative of kinetic energy in turbocharger shaft, which is equal to difference in power between turbine and compressor with friction losses 13,20–22 as illustrated by,…”

Section: Modeling Airpath Systemmentioning

confidence: 99%

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: Modeling Airpath Systemmentioning

confidence: 99%

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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“…To demonstrate the benefits of the proposed regulator design, we present a case study concerning a tracking control problem for air path systems of turbocharged Diesel engines (Guzzella and Amstutz, 1998) characterized by a redundant set of actuators, namely an Exhaust Gas Recirculation (EGR) valve, a Variable Geometry Turbine (VGT), and a Variable Geometry Compressor (VGC) (Canova et al, 2011). A schematic representation of the considered air path system is shown in Figure 2, illustrating the available actuator set.…”

Section: Case Study: Over-actuated Diesel Enginementioning

confidence: 99%

Predictive inverse model allocation for constrained over-actuated linear systems

2016

Self Cite

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The paper presents a model predictive allocation scheme for constrained over-actuated linear systems, for which input redundancy entails the existence of multiple trajectories in the state space yielding a given reference output. The method relies upon the concept of inverse model allocation, where dynamic allocation of reference state and input trajectories is accomplished within the framework of output regulation while maintaining invariance of the error-zeroing subspace. The study focuses on the design of model predictive allocator to achieve constraint satisfaction and asymptotic evolution of the trajectories to a precomputed steady-state target. In particular, the objective of this study is the analysis of the stability and feasibility properties of the proposed schemes and the characterization of suitable sufficient conditions for stability in geometric terms. In support of the theoretical findings, this study presents an example where the proposed methodology is applied to solve a constrained tracking control problem for the linearized model of the air path system of a turbocharged Diesel engine.

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“…In previous work [10], [11], a mean-value model was derived and validated to capture the dynamics of the engine air path system. The model equations read as:…”

Section: A Diesel Engine Air Path Modelmentioning

confidence: 99%

“…Based on these maps, an analytical expression for the compressor power, P c , was derived. Further details on the equations that define the variables in (2), parameters that need to be calibrated and calibration procedures can be found in [10].…”

Section: A Diesel Engine Air Path Modelmentioning

confidence: 99%

Dynamic steady-state allocation for over-actuated turbocharged diesel engines

Zhou

Fiorentini

Canova

et al. 2013

52nd IEEE Conference on Decision and Control

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This paper presents a control design for the air path system dynamics of a turbocharged Diesel engine equipped with exhaust gas recirculation (EGR), variable geometry turbine (VGT) and a variable geometry compressor (VGC) system. Previous work has shown that the VGC actuator provides the opportunity to improve the stability of the compressor, optimize its efficiency and increase the shaft speed to minimize the turbo lag during transients. Building upon this study, the extra degree of freedom introduced by the VGC is exploited in this paper to dynamically optimize some performance variables during transients while regulating the controlled variables to the desired set points. A linearized model, derived from a validated model of the engine air-path dynamics, is used for control design. The proposed control methodology, suitable for over-actuated systems, relies on the characterization of the redundancy in geometric terms. This redundancy is exploited to shape the steady-state response by optimizing on-line a given cost function. A case study that shows the effectiveness of the proposed control strategy is presented. 52nd IEEE Conference on Decision and ControlDecember 10-13, 2013. Florence, Italy 978-1-4673-5717-3/13/$31.00 ©2013 IEEE 6843

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Modeling and Analysis of a Turbocharged Diesel Engine with Variable Geometry Compressor System

Cited by 12 publications

References 21 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

Predictive inverse model allocation for constrained over-actuated linear systems

Dynamic steady-state allocation for over-actuated turbocharged diesel engines

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