In automotive dry clutch systems the cushion spring plays an important role in terms of gradually torque transmitted during the engagement phase. In fact, it strongly influences the clutch torque transmission from engine to driveline through its non-linear load deflection curve. Therefore, to improve the gearshift performance in automated manual transmission is fundamental the knowledge of the cushion spring compression behaviour. Furthermore, the cushion spring compression behaviour is influenced by the temperature due to the frictional heat generation of clutch facings with the flywheel and the pressure plate surfaces during the engagement phase. In this paper an analysis on the load-deflection curve, taking into account the thermal load to which it is subjected, of a typical passenger car cushion spring is proposed. Four temperature load values, in addition to the room one, have been analysed to investigate how the cushion spring load-deflection curve depends from temperature.

CUSHION SPRING SENSITIVITY TO THE TEMPERATURE RISE IN AUTOMOTIVE DRY CLUTCH AND EFFECTS ON THE FRICTIONAL TORQUE CHARACTERISTIC

CAPPETTI, Nicola;PISATURO, MARIO;SENATORE, ADOLFO
2012

Abstract

In automotive dry clutch systems the cushion spring plays an important role in terms of gradually torque transmitted during the engagement phase. In fact, it strongly influences the clutch torque transmission from engine to driveline through its non-linear load deflection curve. Therefore, to improve the gearshift performance in automated manual transmission is fundamental the knowledge of the cushion spring compression behaviour. Furthermore, the cushion spring compression behaviour is influenced by the temperature due to the frictional heat generation of clutch facings with the flywheel and the pressure plate surfaces during the engagement phase. In this paper an analysis on the load-deflection curve, taking into account the thermal load to which it is subjected, of a typical passenger car cushion spring is proposed. Four temperature load values, in addition to the room one, have been analysed to investigate how the cushion spring load-deflection curve depends from temperature.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/3863956
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact