An application of the heat accumulator and improvement of the DC-DC converter for hybrid-electric vehicles

• Autorzy: Kosztyła T. , Tutaj J.

Identyfikatory

DOI

10.5604/12314005.1216492

• Języki publikacji: EN

Abstrakty

EN

In this article, both problems of the internal combustion-engine’s thermal equilibrium as well as improving the DC-DC converter’s operation in the hybrid-electric vehicle’s propulsion system. The purpose of the proposed amendments is to increase the energy efficiency of the hybrid-electric vehicle’s propulsion system. Such a hybridelectric vehicle in city traffic is characterized by intermittent operation of the internal combustion engine with long pauses, which causes difficulty in obtaining and maintaining the desired operating temperature of the internal combustion engine, especially at low outdoor temperatures and intensive use of the heating system inside the hybridelectric vehicle. The result is the increased emission of noxious exhaust gas components and increased fuel consumption. The proposed solution to this problem is to apply heat accumulator in the cooling system. It is stored in the waste heat from the cooling system used to obtain and maintain the internal combustion engine’s nominal operating temperature. The paper presents the results of simulation analyses the impact of applying heat accumulator in the hybrid-electric vehicle driving in city traffic, at different ambient conditions, such as: air temperature, internal combustion engine’s load and the frequency and length of stops. The proposed algorithm for controlling the circulation of the cooling liquid ensures as soon as possible to achieve and maintain the internal combustion engine’s temperature. Furthermore, the temperature of the operating medium can be adjusted depending on the operating conditions of the internal combustion engine. Experimental studies, on the example of the Toyota Prius and Yaris, confirmed the desirability of the use of the proposed solution. Improving the DC-DC converter’s current is to change the configuration by the use of a two-phase DC-DC converter – instead of a single-phase DC-DC converter, supplying a DC-AC inverter of the DC motoring the hybrid-electric vehicle’s propulsion system. This article also includes waveforms for comparison of the properties of both DC-DC converters.

Słowa kluczowe

EN

simulation; road transport; DC-DC converter; propulsion system; heating system; hybrid vehicle

• 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: 2016
• Tom: Vol. 23, No. 3
• Strony: 263--270
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Kosztyła T.

• State Higher Vocational School in Krosno Department of Engineering and Construction Machinery Rynek 1, 38-400 Krosno, Poland tel.: [phone], fax: [phone]

autor

Tutaj J.

• Krakow University of Technology Department of Mechanical Engineering Institute for Automotive Vehicles and Combustion Engines Warszawska Street 24, 31-155 Krakow, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Brzeżański, M., Spark ignition engine exhaust gas toxic components emission during warming up phase with use of heat storage, Combustion Engine, SC3, 2007.
• [2] Kruse, H., Reibungsanalyse beim Kaltstart einer Verbrennungskraftmaschine, Dissertation TU, Hannover 1964.
• [3] Schatz, O., Cold-start improvements with latent heat store, Automotive Engineering, 1992.
• [4] Setlak, R., Kuś, P., Thermal analysis in combustion engine cooling car system using mild hybdrid drive, Krakow 2010.
• [5] Szumanowski, A., Hybrid electric vehicle drives fitted with combustion engines, Institute of Sustainable Technologies, Radom 2009.
• [6] Tutaj, J., A two-phase DC-DC converter and its application in the automotive technology, The Archives of Automotive Engineering, No. 4, pp. 279-285, 2010.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.