Method for determining the shift sequence of a change of transmission ratio of a transmission device in a vehicle drive train

US9291261B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Eckehard Münch · Jülich, DE
• Uwe Heitz · Markdorf, DE
• Mauro Cesar Zanella · Dielingen, DE
• Manfred Sieger · Freudenstadt, DE
• Jörg Geis · Markdorf, DE

Key dates

• Filing date: Mar 13, 2012
• Grant date: Mar 22, 2016
• Expiry date: Sep 27, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/161
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The shift sequence for a transmission ratio change of a vehicle drive train is determined depending on an operating state of the vehicle drive train existing upon the actual transmission ratio of the transmission device. The operating state is characterized by various operating state quantities of the vehicle drive train, which represent input quantities of a model representing the vehicle drive train. Output quantities of the model supply at least one target value that determines the shift sequence in terms of characterization and application as input quantities of an optimization routine, by which a minimization of the functional connection of at least one target value is carried out. The torque characteristics representing the shift sequence of devices of the vehicle drive train are determined depending on the minimum of the functional connection of at least one target value, taking into account the limits of the operating state quantities.