Method for determining a rotational speed of a driveshaft of an internal combustion engine

US9068905B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Matthias Cwik · Stuttgart, DE
• Markus Roessle · Stuttgart, DE
• Ewald Mauritz · Rutesheim, DE
• Stefan Tumback · Stuttgart, DE

Key dates

• Filing date: Feb 23, 2011
• Grant date: Jun 30, 2015
• Expiry date: Aug 26, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02N2300/2006
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method determines a rotational speed of a driveshaft of an internal combustion engine. The rotating driveshaft assumes different rotary positions at different times. An average gradient of rotary speed for the driveshaft is determined at at least two rotary positions. Subsequently, an average rotational speed for the driveshaft is obtained from a past average gradient of rotary speed at at least one later point in time.