The impact of drive mode of a hybrid drive system on the energy flow indicators in the RDE test
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Faculty of Transport Engineering, Poznan University of Technology.
Publication date: 2018-11-01
Combustion Engines 2018,175(4), 18–25
The drive to reduce fuel consumption of vehicles equipped with internal combustion engines leads to an increasing share of hybrid drives used in various means of transport. Such hybrid vehicles, thanks to the use of diesel-electric drive systems, allow for a fuel consumption reduction, and thus to reduce the carbon dioxide emissions. This fuel consumption reduction results from a specifically selected energy flow strategy in hybrid systems. This strategy was the focus of the research performed in order to identify the energy flow conditions in a hybrid drive system in driving conditions corresponding to the RDE test. A Lexus LS 500h vehicle was tested in two drive modes, while determining the related energy flow conditions, including the operating conditions of: electric motors, internal combustion engine and battery. Energy balance was determined taking into account the high voltage battery discharge and charging energy as well as the energy recovered during regenerative braking. It was found that in the RDE test conditions the vehicle is in electric mode for over 30% of the distance and 35% of the drive time, with the energy balance of the vehicle being positive (SOCend > SOCstart). Additionally, it was pointed out that the time spent in the electric mode when driving in urban conditions is about 50% and decreases to about 15% for highway conditions.
ANDERSSON, J. Particle Number (PN) measurement experiences from 2016 AECC GDI GPF project. AECC Seminar on real-driving emissions of particles. Brussels, 2016.
CIEŚLIK, W., PIELECHA, I., SZAŁEK, A. Assessment of parameters of the hybrid drive system in vehicles in urban traffic conditions. Combustion Engines. 2015, 161(2), 14-27.
Commission Regulation (EU) 2016/646 of 20 April 2016 amending Regulation (EC) No 692/2008 as regards emissions from light passenger and commercial vehicles (Euro 6), Verifying Real Driving Emissions, Official J. European Union, L 109, 2016.
KATO, S., ANDO, I., OHSHIMA, K. et al. Development of Multi Stage Hybrid System for New Lexus Coupe. SAE Technical Paper, 2017-01-1173.DOI:10.4271/2017-01-1173.
KUMAZAKI, K., MATSUBARA, T., KOBAYASHI, N. et al. Development of shift control system for Multi Stage Hybrid Transmission. SAE Technical Paper 2017-01-1150, 2017.DOI:10.4271/2017-01-1150.
Lexus Experience Amazing, (accessed 17.10.2018).
Lexus Tech: Inside the Multi-Stage Hybrid System, 14.12.2017. (accessed 03.09.2018).
MAIWALD, O., BRUCK, R., ROHRER, S. et al. Optimised diesel combustion and SCR exhaust aftertreatment combined with a 48 V system for lowest emissions and fuel consumption in RDE. Aachen Colloquium, 2016.
MERKISZ, J., PIELECHA, I. Mechanical systems for hybrid vehicles. 2015, Publishing House Poznan University of Technology.
OKUDA, K., YASUDA, Y., ADACHI, M. et al. Development of Multi Stage Hybrid Transmission. SAE Int. J. Alt. Power. 2017, 6(1). DOI:10.4271/2017-01-1156.
OSHIMA, K., KATO, S. New Multi Stage Hybrid System for the LC500h with innovative drivability of the THSII. 39 Internationales Wiener Motorensymposium. 2018.
PIELECHA, J., JASIŃSKI, R., MAGDZIAK, A. Practicability of passenger vehicle driving emission tests according to new European Union procedures. MATEC Web Conferences 118, 00021, 2017.
SCHARF, J., OGRZEWALLA, J., WOLFF, K. et al. Gasoline engines for hybrid powertrains – high tech or low cost? 38thInternationales Wiener Motorensymposium. 2017.
Toyota Motor Europe, (accessed 10.10.2018).
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