Electromagnetic camshaft-adjuster device

US8448615B2 · kind B2 · utility

Assignees

• ETO MAGNETIC GMBH · DE
• Daimler AG · DE

Inventors

• Markus Laufenberg · Stockach, DE
• Thomas Schiepp · Seitingen-Oberflacht, DE
• Simone Nowak · Schorndorf, DE
• Bernd-Heinrich Schmitfranz · Eßlingen, DE

Key dates

• Filing date: Mar 31, 2010
• Grant date: May 28, 2013
• Expiry date: May 13, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01F2007/185
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An electromagnetic camshaft-adjuster device having an armature unit (14, 42) drivable along an axial direction in reaction of a current feed of a stationary inductor unit (10), which for interacting with an adjusting unit (16, 48) causing adjustment of a camshaft of an internal combustion engine is configured with a slide and/or tappet unit, wherein on and/or in the armature unit and/or the adjusting unit, a permanent magnet element (20, 44) is provided and the inductor unit and the armature unit are at least partially received in a housing or supporting unit, and wherein the supporting unit is associated with a configured stationary magnetic field detection element (22, 38) preferably for contactless magnetic interaction with the permanent magnet element, which is configured so that in a current feed condition and a non current feed condition the inductor unit an axial position of the armature unit and/or the adjusting unit can be determined electronically by evaluating a magnetic field detection signal of the magnetic field detection element.