Device for actuating a control member

F - Mech Eng,Light,Heat,Weapons – 02 – D

Patent

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Details

F02D 9/10 (2006.01) F02D 11/10 (2006.01) F16K 31/08 (2006.01) H01F 7/14 (2006.01) H02K 26/00 (2006.01)

Patent

CA 2169281

The invention relates to a device for actuating a control member, particularly a throttle valve in a gas conduit (3), such as for example an intake of an internal-combustion engine, which valve 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 c 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.

L'invention porte sur un dispositif d'entraînement d'un élément de régulation, en particulier du papillon de carburateur d'une conduite de gaz d'un moteur à combustion interne, ledit papillon pouvant pivoter entre une position de repos et une position de fonctionnement autour d'un axe (5) solidaire d'un élément d'entraînement constitué par un rotor magnétique (9) qui à travers un entrefer (10) coagit avec les pièces polaires (15) d'une partie excitatrice fixe (11) alimentée en courant lors des reprises. Lesdites pièces polaires entourent ledit corps de rotor et la partie excitatrice (11) comporte un stator en U dont les branches (12a, 12b) qui en constituent les pièces polaires (15) coagissent avec le corps magnétique du rotor (9) à travers l'entrefer pour le soumettre (9) à un couple magnétique tendant à le ramener dans une position de repos bien définie et par là à amener le papillon (4) dans le sens opposé à la direction d'ouverture dans une position de repos bien définie, à l'état non activé.

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