The Hybrid Electric Vehicles (HVEs) are reaching a wide diffusion both because the energy density and life of batteries increased in the last years with a decrease of their costs and because the reduction of air pollution is a very important issue, especially in big cities. This latter is one, or probably the main, reason that pushes the development of HEVs and electric vehicles (EVs). A secondary advantage of HEVs could be to protect the clutch components from overheating problems. For this reason, the contribute of the electric motor (EM) to reduce overheating of clutch material during the slipping phase has been investigated in this paper. As well known, thermal issue is one of the most important aspect which affects automotive dry clutch systems. In fact, if the clutch material reaches a temperature of 250-300 Celsius degree it could suffer permanent damage as well as to produce a burnt smell perceived by car passengers. Thus, in this paper vehicle launch simulations have been carried out to highlight how the intervention of the electric motor can effectively reduce thermal field during the slipping phase by avoiding to reach critical values.
COULD ELECTRIC MOTOR IN HEV ASSIST VEHICLE LAUNCH AND RELIEF DRY CLUTCH FROM THERMAL DAMAGE?
PISATURO, MARIO;SENATORE, Adolfo;D'Agostino,Vincenzo
2017-01-01
Abstract
The Hybrid Electric Vehicles (HVEs) are reaching a wide diffusion both because the energy density and life of batteries increased in the last years with a decrease of their costs and because the reduction of air pollution is a very important issue, especially in big cities. This latter is one, or probably the main, reason that pushes the development of HEVs and electric vehicles (EVs). A secondary advantage of HEVs could be to protect the clutch components from overheating problems. For this reason, the contribute of the electric motor (EM) to reduce overheating of clutch material during the slipping phase has been investigated in this paper. As well known, thermal issue is one of the most important aspect which affects automotive dry clutch systems. In fact, if the clutch material reaches a temperature of 250-300 Celsius degree it could suffer permanent damage as well as to produce a burnt smell perceived by car passengers. Thus, in this paper vehicle launch simulations have been carried out to highlight how the intervention of the electric motor can effectively reduce thermal field during the slipping phase by avoiding to reach critical values.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
