Method for the operation of a multiple clutching device and a power shift transmission

US6881171B2 · kind B2 · utility

Assignee

• ZF Sachs AG · DE

Inventors

• Jochen Kuhstrebe · Wassertrüdingen, DE
• Thomas John · Augsburg, DE
• Rainer Reuthal · Unterpleichfeld, DE
• Thomas Strasser · Boynton Beach, US

Key dates

• Filing date: Dec 21, 2001
• Grant date: Apr 19, 2005
• Expiry date: Dec 21, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19233
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

In either a pull-mode operating state or a push-mode operating state, a clutch arrangement assigned to the first gearbox input shaft and a clutch arrangement assigned to the second gearbox input shaft are actuated in such a way and a torque-generating arrangement comprising a drive unit is controlled in such a way that, when a shift is to be made between a first gear assigned to a first gearbox input shaft and a second gear assigned to a second gearbox input shaft, at least one of the following criteria with respect to the shifting sequence comprising the shift in question is fulfilled:(1) during the shifting sequence, the torque present at the gearbox output shaft is at least approximately constant or changes monotonically;(2) during the shifting sequence, the vehicle accelerates in an essentially monotonically increasing or in an essentially monotonically decreasing manner.