The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2005
Filed:
Nov. 07, 2001
Markus Henneken, Kressbronn, DE;
Friedemann Jauch, Meckenbeuren, DE;
Franz-josef Schuler, Kressbronn, DE;
Thomas Mauz, Langenargen, DE;
Michael Kiefer, Rehlingen-Siersburg, DE;
Markus Henneken, Kressbronn, DE;
Friedemann Jauch, Meckenbeuren, DE;
Franz-Josef Schuler, Kressbronn, DE;
Thomas Mauz, Langenargen, DE;
Michael Kiefer, Rehlingen-Siersburg, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method for controlling an automatic transmission of a motor vehicle in the event of a spontaneous gas/pedal release (FastOff). The automatic transmission is driven by an internal combustion engine which can be influenced by an accelerator pedal and a signal proportional to a pedal position is fed to an electronic transmission control in which shifting characteristic field is stored and the spontaneous gas/pedal release (FastOff) is detected and an upshift block (FFO=1) is activated when a pedal position gradient (PSTG) falls below a pedal gradient threshold (KF_PSTG). The mode of the upshift block (FFO=1) is removed when a traction operation is detected when an actual engine torque (MMM) exceeds a push-pull line (KL_ZS) stored as a function of a value equivalent to an engine rotational speed (NMO) in dependence on a vehicle acceleration/deceleration (AIST) dependent on an overall tractional resistance (GFW) and pedal gradient thresholds (KW_PSTGPOS, KW_PSTGNEG).