Integrated, Feed-Forward Hybrid Electric Vehicle Simulation in SIMULINK and its Use for Power Management Studies

Lin, Chih-Yang; Filipi, Zoran; Wang, Yongsheng; Louca, Loucas S.; Peng, Huei; Assanis, Dennis N.; Stein, Jeffrey L.

doi:10.4271/2001-01-1334

Cited by 102 publications

(68 citation statements)

References 10 publications

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“…Simulation tools are indispensable for rapid prediction of vehicle behavior during a typical mission and evaluation and selection of propulsion concepts and components early in the design process [8,10,11,19,[26][27][28][29][30][31][32][33][34]. Simulation tools also make it possible to vary and optimize component and subsystem designs for given goals and constraints [35,36].…”

Section: Engine-in-the-loop With a Virtual Vehiclementioning

confidence: 99%

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Hydraulic Hybrid Propulsion for Heavy Vehicles: Combining the Simulation and Engine-In-the-Loop Techniques to Maximize the Fuel Economy and Emission Benefits

Filipi

Kim

2009

Oil & Gas Science and Technology

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Résumé -Propulsion hybride hydraulique des poids lourds : une approche alliant les techniques de simulation et d'« Engine-In-the-loop » (EIL) afin de maximiser les économies de carburant et les avantages en termes d'émissions-La situation énergétique mondiale, la dépendance du secteur des transports vis-à-vis des combustibles d'origine fossile et la nécessité d'une réponse rapide face au défi présenté par le réchauffement climatique fournissent une forte motivation pour le développement de moyens de propulsion véhiculaires économes. Pour les camions, cette tâche est particulièrement difficile à accomplir du fait d'importantes contraintes de taille et de poids. L'hybridation est la seule approche qui puisse déboucher sur des progrès importants à court et moyen termes. En particulier, la configuration "hybride série" découple le moteur thermique des roues et permet une flexibilité complète dans le contrôle des points de fonctionnement moteur. De plus, la conversion et le stockage de l'énergie hydraulique fournissent une densité de puissance et un rendement excellents. Le défi technologique tient à la faible densité d'énergie de l'accumulateur hydraulique, et met en avant l'importance particulière du développement du gestionnaire de l'énergie. Il est communément admis qu'il faut maintenir le moteur au point de rendement maximum mais, si l'objectif ultime en terme énergétique consiste à optimiser drastiquement le rendement du moteur, ceci induit des phases transitoires fréquentes causant pour des moteurs diesels des effets opposés tant sur l'émission de particules que sur l'agrément de conduite. Par conséquent, nous proposons une méthodologie pour le superviseur d'énergie d'un système hybride, qui prend en compte 2 objectifs : la réduction de consommation et la réduction des émissions polluantes. Les économies de carburant sont prises en compte par une approche fondée sur la simulation, alors que l'étude de l'impact des phases transitoires du moteur sur les émissions de particules, est fondée sur un dispositif expérimental combinant modèles temps réel et moteur réel -l'EIL (Engine-In-the-Loop). Le dispositif EIL confirme que le contrôle de la répartition énergétique thermique/hydraulique de l'état de charge des batteries (SOC) présente des avantages certains sur celui basé sur l'approche de contrôle type « bang-bang ». De plus, elle démontre la capacité de l'Hybride Hydraulique Série à améliorer de 72 % les économies de carburant d'un camion de taille moyenne tout en réduisant les émissions de particules de 74 % comparée á la référence conventionnelle sur le cycle de conduite urbain.

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Section: Engine-in-the-loop With a Virtual Vehiclementioning

confidence: 99%

“…logic [48,49], or horizon optimization [31,32,50,51]. The nature of the series hybrid system, with the engine decoupled from the wheels, allows significant freedom in designing the supervisory control strategy.…”

Section: Z Filipi and Yj Kim / Hydraulic Hybrid Propulsion For Heavy mentioning

confidence: 99%

Hydraulic Hybrid Propulsion for Heavy Vehicles: Combining the Simulation and Engine-In-the-Loop Techniques to Maximize the Fuel Economy and Emission Benefits

Filipi

Kim

2009

Oil & Gas Science and Technology

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“…Hierarchical methodologies for optimally designing a complex vehicle system are explored in [8], while [21] considers design under uncertainty. Techniques for optimal power management are addressed in [19,22]. Finally, a methodology for the combined optimization of hybrid propulsion system design and power management is proposed by Filipi et al in [23].…”

Section: Approach -Merging the Real And Virtual Worldsmentioning

confidence: 99%

Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion Concepts and Transient Emissions - HMMWV Case Study

Filipi¹,

Fathy²,

Hagena³

et al. 2006

SAE Technical Paper Series

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This paper describes a test cell setup for concurrent running of a real engine and a vehicle system simulation, and its use for evaluating engine performance when integrated with a conventional and a hybrid electric driveline/vehicle. This engine-in-the-loop (EIL) system uses fast instruments and emission analyzers to investigate how critical in-vehicle transients affect engine system response and transient emissions. Main enablers of the work include the highly dynamic AC electric dynamometer with the accompanying computerized control system and the computationally efficient simulation of the driveline/vehicle system. The latter is developed through systematic energy-based proper modeling that tailors the virtual model to capture critical powertrain transients while running in real time. Coupling the real engine with the virtual driveline/vehicle offers a chance to easily modify vehicle parameters, and even study two different powertrain configurations. In particular, the paper describes the engine-in-the-loop study of a V8, 6L engine coupled to a virtual 4x4 HighMobility Multipurpose Wheeled Vehicle (HMMWV). The results shed light on critical transients in a conventional powertrain and their effect on NO x and soot emissions. Next, the conventional HMMWV powertrain is replaced with a parallel hybrid electric configuration and two power management strategies are examined. Comparison of the conventional and hybrid propulsion options provides detailed insight into fuel economyemissions tradeoffs at the vehicle level.

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“…torque converter, transmission, differential etc, covering up to hybrid truck operation. An extended set of simulations was carried out for truck acceleration or Transient Cycles studies [55][56][57]. They also investigated the effect of various parameters on the vehicle and engine transient response with emphasis on VGT systems.…”

Section: Historical Overviewmentioning

confidence: 99%

“…A slightly different approach, being in the middle of quasi-linear and filling and emptying modeling, has been also adopted [55,57,114,115]. Here, a o CA based thermodynamic code was used to generate a steadystate, multi-dimensional, look-up engine torque map.…”

Section: Combustionmentioning

confidence: 99%

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Rakopoulos¹,

Giakoumis²

2006

SAE Technical Paper Series

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Study and modeling of transient operation is an important scientific objective. This is due to the fact that the majority of daily vehicle driving conditions involve transient operation, with non-linear situations experienced during engine transients. Thus, proper interconnection is needed between engine, governor, fuel pump, turbocharger and load. This paper surveys the publications available in the open literature concerning diesel engine simulations under transient operating conditions. Only those models that include both full engine thermodynamic calculations and dynamic powertrain modeling are taken into account, excluding those that focus on control design and optimization. Most of the attention is concentrated to the simulations that follow the filling and emptying modeling approach. A historical overview is given covering, in more detail, research groups with continuous and consistent study of transient operation. One of the main purposes of this paper is to summarize basic equations and modeling aspects concerning in-cylinder calculations, friction, turbocharger, engine dynamics, governor, fuel pump operation, and exhaust emissions during transients. The various limitations of the models are discussed together with the main aspects of transient operation (e.g. turbocharger lag, combustion and friction deterioration), which diversify it from the steady-state. Some of the most important findings in the field during the last 30 years are presented and discussed. The survey extends to special cases of transient diesel engine simulation, such as second-law analysis, response when the turbocharger compressor experiences surge, and whole vehicle performance. Several methods of improving transient response are also mentioned, based on the various simulations. An easy-to-read tabulation of all research groups dealing with the subject, that includes details about each model developed and engines/parameters studied, is also provided at the end of the paper.

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Integrated, Feed-Forward Hybrid Electric Vehicle Simulation in SIMULINK and its Use for Power Management Studies

Cited by 102 publications

References 10 publications

Hydraulic Hybrid Propulsion for Heavy Vehicles: Combining the Simulation and Engine-In-the-Loop Techniques to Maximize the Fuel Economy and Emission Benefits

Hydraulic Hybrid Propulsion for Heavy Vehicles: Combining the Simulation and Engine-In-the-Loop Techniques to Maximize the Fuel Economy and Emission Benefits

Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion Concepts and Transient Emissions - HMMWV Case Study

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

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