Adaption device for transmitter wheel of combustion engine

US5696316A · kind A · utility

Assignees

• Robert Bosch GmbH · DE
• AUDI AG · DE

Inventors

• Manfred Mezger · Markgröningen, DE
• Martin Klenk · Munich, DE
• Heinz Bohmler · Pleidelsheim, DE
• Karsten Mischker · Leonberg, DE
• Klaus Ries-Muller · Bad Rappenau, DE
• Wolfgang Wimmer · Rietheim, CH

Key dates

• Filing date: Nov 20, 1995
• Grant date: Dec 9, 1997
• Expiry date: Nov 20, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G01P21/02
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A transmitter wheel is used for example to detect speed changes of an internal combustion engine with high precision in order to calculate a running imbalance value from them. A transmitter wheel of this kind has for example three segments, which are ideally the same length, but in reality usually have lengths which differ slightly from one another. In order to prevent measurement errors which are caused by this, it is known to determine the actual lengths by means of an adaption process. The device according to the invention is embodied such that for each segment, it has a plurality of adaption filters to detect different adaption values for different speed ranges. It has namely turned out that in different speed ranges, different lengths are measured, which is an error that must be compensated for since the length of a segment is in fact actually constant.