Procedure for controlling continuous variable transmissions in motor vehicles

US5983152A · kind A · utility

Assignee

• Temic Telefunken Microelectronik · DE

Inventors

• Michael Genzel · Roßtal, DE
• Rodolfo Moller · Nürnberg, DE
• Armin Tonn · Roth, DE

Key dates

• Filing date: Jan 8, 1997
• Grant date: Nov 9, 1999
• Expiry date: Jan 8, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H61/66254
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A process for regulating continuously variable transmissions in motor vehicles by means of a controller includes a first control circuit as a speed controller for regulating the transmission input speed as the product calculated from the transmission output speed and the transmission ratio, and a second control circuit post-connected to the first control circuit as a speed gradient controller for regulating the time derivative of the transmission input speed. A correction value, dependent on the functional value of a correcting function and obtained from a correction element, is added to the summation element at the controller input of one of the two control circuits. The correction value is obtained such that the regulating ranges are specified, respectively, with a different control behavior of the controller.