Powershift transmission having two clutches and a device for recording the clutch torque and method for the control of a push downshift

US7080569B2 · kind B2 · utility

Assignee

• LuK Lamellen und Kupplungsbau Beteiligungs KG · DE

Inventors

• Marian Preisner · Laufenburg (Baden), DE
• Jurgen Benz · Besigheim, DE
• Reinhard Berger · Bühl, DE
• Dietmar Lang · Regenstauf, DE
• Alexander Schweizer · Laufenburg (Baden), DE
• Olaf Werner · Laufenburg (Baden), DE

Key dates

• Filing date: May 21, 2004
• Grant date: Jul 25, 2006
• Expiry date: Sep 27, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19274
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A powershift transmission is proposed using two transmission paths, a friction clutch being assigned to each transmission path and the transmission paths being coupleable to an output shaft for torque transmission. The transmission has a device that detects the clutch torque transmitted by the friction clutch of the active transmission path, which is coupled to the output shaft, and, when the clutch torque falls below threshold value, initiates a disengagement of the active gear ratio.