Method for motor reduction while closing the bridging clutch of an automatic transmission for vehicles

US6449550B1 · kind B1 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Otto Lutz · Bad Königshofen im Grabfeld, DE
• Franz Sorg · Aalen, DE
• Peter Muschel · Friedrichshafen, DE
• Roland Leibinger · Markdorf, DE

Key dates

• Filing date: Aug 28, 2000
• Grant date: Sep 10, 2002
• Expiry date: Aug 28, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H63/50
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Within the scope of the method for motor reduction while closing the lock-up clutch for automatic transmission of a motor vehicle, the starting value of the motor reduction is brought up via an adjustable ramp within the time period elapsed while laying on the disks of the lock-up bridge clutch, the motor reduction being adjustable with reference to a characteristic field.