Device for actuating a control member

US5624100A · kind A · utility

Assignee

• U.S. Philips Corporation · US

Inventors

• Ekkehard Bolte · Aachen, DE
• Bernd Ackermann · Aachen, DE
• Leo Bertram · Stolberg, DE

Key dates

• Filing date: Jun 7, 1995
• Grant date: Apr 29, 1997
• Expiry date: Jun 7, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2011/103
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A throttle valve in a gas conduit (3), such as for example an intake of an internal-combustion engine, is pivotable from an idling position into operating positions by means of a valve shaft (5), the valve shaft (5) carrying an actuator body formed by a magnetised rotor body (9) which, via an air gap (10), cooperates with pole shoes (15) of a stationary excitation section (11), which is electrically energisable by a pick-up, which pole shoes surround said rotor body externally, the excitation section (11) comprising a U-shaped stator whose limbs (12a, 12b) form the pole shoes (15), which cooperate with the permanent-magnet rotor body (9) at the air gap, in such a manner that the rotor body (9) is subjected to magnetic torques which tend to pull said rotor body into a well-defined rest position, in order to thereby return the throttle valve (4) in a direction opposite to the opening direction into a well-defined rest position in the non-energised condition.