Method of accurately controlling the armature motion of an electromagnetic actuator

US5748433A · kind A · utility

Assignee

• FEV Motorentechnik GmbH & Co., KG · DE

Inventors

• Ekkehard Schrey · Aachen, DE
• Lutz Kather · Würselen, DE
• Frank van der Staay · Aachen, DE

Key dates

• Filing date: Jul 22, 1996
• Grant date: May 5, 1998
• Expiry date: Jul 22, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2041/2037
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method of controlling a motion of an armature away from an electromagnet of an electromagnetic actuator includes the following steps: passing an electric current through a solenoid of the electromagnet for holding the armature at the electromagnet against a resetting force; interrupting the current flow through the solenoid at a desired moment for releasing the armature from the electromagnet; and impressing a current pulse of reverse polarity on the solenoid after interrupting the current flow for launching the armature from the electromagnet.