TY - GEN
T1 - Torque-vectoring driveline for electric vehicles
AU - Hoehn, Bernd Robert
AU - Stahl, Karsten
AU - Gwinner, Philipp
AU - Wiesbeck, Ferdinand
PY - 2013
Y1 - 2013
N2 - The range of electric vehicles is limited due to the battery capacity. As a result of high prices for batteries as well as a rising weight using additional battery modules, both the feasible level of electric recuperation and the efficiency of the system have to be as high as possible. Therefore, the Technische Universität München has developed and designed a new torque-vectoring system for electrical powertrains. Besides the main driving machine a second smaller superimposing electric motor combined with a superimposing gear makes it possible to recuperate brake energy for all driving situations. Especially in curves with high lateral forces the new system reaches higher recuperation values than comparable systems. The system size of the superimposing machine is only about 5 % of the vehicle's driving power. Due to the continuously variable power delivery there are no slipping losses, i. e. such as those of wet clutches. The overall losses in the presented powertrain are only 10 % of the losses compared to existing systems. Gearbox efficiency results, which were calculated with a simulative model, are presented for straight-ahead driving and cornering. Varying deceleration values for these driving conditions, efficiency values are illustrated for different recuperation levels with or without the superimposing machine being activated.
AB - The range of electric vehicles is limited due to the battery capacity. As a result of high prices for batteries as well as a rising weight using additional battery modules, both the feasible level of electric recuperation and the efficiency of the system have to be as high as possible. Therefore, the Technische Universität München has developed and designed a new torque-vectoring system for electrical powertrains. Besides the main driving machine a second smaller superimposing electric motor combined with a superimposing gear makes it possible to recuperate brake energy for all driving situations. Especially in curves with high lateral forces the new system reaches higher recuperation values than comparable systems. The system size of the superimposing machine is only about 5 % of the vehicle's driving power. Due to the continuously variable power delivery there are no slipping losses, i. e. such as those of wet clutches. The overall losses in the presented powertrain are only 10 % of the losses compared to existing systems. Gearbox efficiency results, which were calculated with a simulative model, are presented for straight-ahead driving and cornering. Varying deceleration values for these driving conditions, efficiency values are illustrated for different recuperation levels with or without the superimposing machine being activated.
KW - Electric city vehicle
KW - Gearbox efficiency
KW - Planetary gear train
KW - Recuperation
KW - Torque-vectoring
UR - http://www.scopus.com/inward/record.url?scp=84869483723&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-33777-2_48
DO - 10.1007/978-3-642-33777-2_48
M3 - Conference contribution
AN - SCOPUS:84869483723
SN - 9783642337765
T3 - Lecture Notes in Electrical Engineering
SP - 585
EP - 593
BT - Proceedings of the FISITA 2012 World Automotive Congress
T2 - FISITA 2012 World Automotive Congress
Y2 - 27 November 2012 through 30 November 2012
ER -