Method of determining diagnostic threshold values for a particular motor vehicle type and electronic computing unit for a motor vehicle

US5781871A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Manfred Mezger · Markgröningen, DE
• Klaus Ries-Mueller · Bad Rappenau, DE

Key dates

• Filing date: Oct 23, 1995
• Grant date: Jul 14, 1998
• Expiry date: Oct 23, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C5/0808
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method of determining diagnostic threshold values for a particular motor vehicle type is proposed, the motor vehicles of the motor vehicle type being equipped with an electronic computing unit and the electronic computing unit having a programmable memory module and a microcomputer, as well as an interface for data communication with an external computer. The diagnostic data of each available motor vehicle of the particular motor vehicle type are transmitted to an external central computer and stored there in a database of the central computer. Then a statistical distribution is formed on the basis of the diagnostic data compiled there. Then at least one diagnostic threshold value for a certain diagnostic data item is established on the basis of this statistical distribution. A suitable electronic computing unit, which programs the newly established diagnostic threshold values into the programmable memory module, is likewise proposed.