Method for checking an emergency condition in a transmission system

US8751122B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Jörg Arnold · Markdorf, DE
• Michael Sohler · Isny im Allgäu, DE
• Klaus Steinhauser · Kreßbronn, DE
• Thilo Schmidt · Meckenbeuren, DE

Key dates

• Filing date: Jan 24, 2013
• Grant date: Jun 10, 2014
• Expiry date: Feb 9, 2033

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2094
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method of monitoring an emergency condition in an automatic transmission, with which, by comparing a theoretical with an actual rotational speed, measured on the transmission input side, overlap of the activated emergency condition, with a gear engagement process called for during the normal condition, is prevented.