Multi-parametric and multi-objective thermodynamic optimization of a spark-ignition range extender ICE

• Autorzy: Toman R. , Brankov I.

Identyfikatory

DOI

10.5604/01.3001.0012.4368

• Języki publikacji: EN

Abstrakty

EN

The current legislation pushes for the increasing level of vehicle powertrain electrification. A series hybrid electric vehicle powertrain with a small Range Extender (REx) unit – comprised of an internal combustion engine and an electric generator – has the technical potential to overcome the main limitations of a pure battery electric vehicle: driving range, heating, and air-conditioning demands. A typical REx ICE operates only in one or few steady-states operating points, leading to different initial priorities for its design. These design priorities, compared to the conventional ICE, are mainly NVH, package, weight, and overall concept functional simplicity – hence the costeffectiveness. The design approach of the OEMs is usually rather conservative: parting from an already-existing ICE or components and adapting it for the REx application. The fuel efficiency potential of a one-point operation of the REx ICE is therefore not fully exploited. This article presents a multi-parametric and multi-objective optimization study of a REx ICE. The studied ICE concept uses a well-known and proven technology with a favourable production and development costs: it is a two-cylinder, natural aspirated, port injected, four-stroke SI engine. The goal of our study is to find its thermodynamic optimum and fuel efficiency potential for different feasible brake power outputs. Our optimization tool-chain combines a parametric GT-Suite ICE simulation model and modeFRONTIER optimization software with various optimization strategies, such as genetic algorithms, gradient based methods or various hybrid methods. The optimization results show a great fuel efficiency improvement potential by applying this multi-parametric and multi-objective method, converging to interesting short-stroke designs with Miller valve timings.

Słowa kluczowe

EN

Range Extender; hybrid electric vehicle; battery electric vehicle; internal combustion engine; spark ignition; thermodynamic optimization; genetic algorithm

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2018
• Tom: Vol. 25, No. 3
• Strony: 459--466
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Toman R.

• Czech Technical University in Prague Faculty of Mechanical Engineering Department of Automotive, Combustion Engine and Railway Engineering Technická Street 4, 166 07 Prague 6, Czech Republic tel.: [phone]

autor

Brankov I.

• Czech Technical University in Prague Faculty of Mechanical Engineering Department of Automotive, Combustion Engine and Railway Engineering Technická Street 4, 166 07 Prague 6, Czech Republic tel.: [phone]

Bibliografia

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• [4] Bogomolov, S., Doleček, V., Macek, J., Mikulec, A., Vítek, O., Combining thermodynamics and design optimization for finding ICE downsizing limits, SAE Technical Paper, 2014-01-1098, 2014.
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• [9] modeFRONTIER – Multi-Objective Design Environment, version 4.4.3. [CD-ROM], 2012.
• [10] Pischinger, M., Tomazic, D., Wittek, K., Esch, H.-J., Köhler, E., Baehr, M., A low NVH range-extender application with small V-2 engine – based on a new vibration compensation system, SAE Technical Paper, 2012-32-0081, 2012.
• [11] Turner, J., Blake, D., Moore, J., Burke, P., Pearson, R., Patel, R., Blundell, D. Chandrashekar, R., Matteucci, L., Barker, P., Card, C., The Lotus Range Extender Engine, SAE Technical Paper, 2010-01-2208, 2010.
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• [13] Vítek, O., Macek, J., Thermodynamic potential of electrical turbocharging for the case of small passenger car ICE under steady operation, SAE Technical Paper, 2017-01-0526, 2017.
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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).