Method for controlling kickdown while braking and as a function of vehicle's operating parameters

US5605519A · 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: Jun 22, 1994
• Grant date: Feb 25, 1997
• Expiry date: Jun 22, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/163
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method for controlling preferably an electro-hydraulic automatic transmission of a motor vehicle fitted with a combustion engine provides a gradual kick-down while braking. In particular the kick-down is performed when, in the course of approaching a bend, a condition is activated, which prevents upshifting. The upshift prevention is initiated when the accelerator pedal is released quickly during shearing action. The upshift prevention stops if after an interval, upon detection of tensile action, the vehicle does drive round a bend. The upshift prevention is followed by a gradual adaptation of the gear level to the shift parameter.