Method for controlling an automatically operated motor vehicle transmission

US5474505A · kind A · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Willi Seidel · Lambach, DE
• Joseph Petersmann · Wimsheim, DE

Key dates

• Filing date: May 9, 1994
• Grant date: Dec 12, 1995
• Expiry date: May 9, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2302/00
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method for controlling an automatically actuated transmission for a motor vehicle, for improving behavior before curves and during braking, provides that a coasting function to suppress a shift or gear ratio changing process is initiated as soon as the accelerator pedal is quickly released. This coasting function is maintained until powered operation is again detected and the vehicle accelerates. Then a holding time is started during which the coasting function is started again as soon as the vehicle changes to coasting operation. The method is applicable to multi-step transmissions as well as continuously variable transmissions.