Method for operating actuators for electromagnetically controlling a valve

US6216652A · kind A · utility

Assignee

• DaimlerChrysler AG Stuttgart · DE

Inventors

• Matthias Gramann · Neunkirchen, DE
• Michael Nagel · Tempe, US
• Reinhard Orthmann · Leonberg, DE
• Hans-Peter Schoener · Seeheim-Jugenheim, DE
• Holger Steffen · Stuttgart, DE
• Werner Wiedemann · Garching bei München, DE
• Rudolf Wilczek · Altdorf, DE

Key dates

• Filing date: Mar 27, 2000
• Grant date: Apr 17, 2001
• Expiry date: Mar 27, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L9/20
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method of operating an actuator for electromagnetically controlling a valve in an internal combustion engine involves supplying a heating current to the operating coils of the actuator before starting the internal combustion engine from a cold start condition. Thereby, the operating coils, the components surrounding them, and the lubricant are heated to ensure proper viscosity of the lubricant and thus proper operation of the actuator.