Gear selection method for an automatic transmission for a traction phase after a coasting phase of a motor vehicle

US8571773B2 · kind B2 · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventor

• Martin Roth · Taufkirchen, DE

Key dates

• Filing date: Jun 13, 2011
• Grant date: Oct 29, 2013
• Expiry date: Dec 6, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/60
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Disclosed herein is a gear selection method and device for an automatic transmission for a traction phase (Z2) after a coasting phase (S) of a motor vehicle. According to the method, in a traction phase (Z1) before the coasting phase (S), a sliding average value of the rotational speed level (n) and/or of the traction force level (Fx) is formed depending on the particular velocity (v) and particular gradient (ST) and is taken into consideration for defining at least one gear choice of the automatic transmission for the traction phase (Z2) after the particular coasting phase (S).