Magnetic field sensor for measuring the rotational speed of a turboshaft

US7372253B2 · kind B2 · utility

Assignees

• Siemens Aktiengesellschaft · DE
• Siemens VDO Automotive AG · US

Inventors

• Peter Biber · Poltringen, DE
• Markus Gilch · Moosburg an der Isar, DE
• Jean-Louis Roux · Brax, FR
• Antoine Simonnet · Paris, FR

Key dates

• Filing date: Jun 26, 2006
• Grant date: May 13, 2008
• Expiry date: Jun 26, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor for measuring the rotational speed of a turboshaft of a turbocharger includes a sensor housing and a sensor element which is positioned in the sensor housing and which senses a variation of a magnetic field caused by the rotation of the turboshaft. In order to provide a sensor for measuring the rotational speed of a turboshaft which can be produced simply and at low cost and also can be integrated in a turbocharger without major structural modifications, the sensor element can be positioned outside the turbocharger, on or in a compressor housing, and a pole piece is arranged on the sensor element in such a way that it concentrates the magnetic field in the sensor element.