Method for the quantitative determination of an aging effect on motor oil

US8166803B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Volker Haller · Holzgerlingen, DE
• Markus Niemann · Annweiler am Trifels, DE
• Thomas Hilberath · Eningen unter Achalm, DE
• Gerald Hamm · Herrenberg, DE
• Rolf Speicher · Lörrach, DE
• Monika Scherer · Bonn, DE
• Udo Kaess · Walheim, DE

Key dates

• Filing date: Jan 25, 2006
• Grant date: May 1, 2012
• Expiry date: Feb 27, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/2888
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The quantitative determination of aging effects on motor oil is of great interest. According to a method, two variables of the motor oil are detected, one of the two variables being the viscosity and the other variable being the acid content of the motor oil. A first deviation of the detected first variable from a default value is then determined, and the second variable is estimated based on the deviation. By determining a second deviation of the estimated second variable from the detected second variable, the second deviation is determined as a measure of the aging effect on the motor oil. Since various aging effects influence the two variables in different manners, individual aging effects may be quantitatively determined in a targeted manner.