Method for controlling a dual clutch transmission

US6698304B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Armin Gierling · Tettnang, DE
• Andreas Paul · Kirkel, DE

Key dates

• Filing date: Sep 19, 2002
• Grant date: Mar 2, 2004
• Expiry date: Oct 12, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19288
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for control of a gear step change in a vehicle having a dual clutch transmission (2) actuatable by a prime mover (4), several gear steps in which a first dividing gear (6) and a second dividing gear (10) can be operatively coupled with the prime mover (4), respectively, by a first clutch (8) and a second clutch (12) and both dividing gears (6, 10) have a common output (14) wherein each dividing gear (6, 10) preferably has several ratio steps and at least two consecutive gear steps of the dual clutch transmission (2) are not associated with the same dividing gear (6, 10). It is proposed that upon a demand for a double downshift, a gear step change occurs within the same dividing gear (6) without the other dividing gear (10) transmitting during the gear step change a torque from the prime mover (4) to the output, and that the torque delivered by the prime mover (4) during the gear step change is essentially used for the acceleration of rotary masses on the side of the prime mover.