Fuel valve for supplying fuel to an auxiliary heating device...

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 31/06 (2006.01) B60H 1/22 (2006.01)

Patent

CA 2625692

A fuel valve (10) for supplying fuel to an auxiliary heating device in a motor vehicle comprises a magnet coil (12), a magnet armature (14) and a spring (16) which can be compressed by the magnetic force generated when a pick-up voltage is applied to the magnet coil and causes the magnet armature to move; at a maximum residual voltage applied to the magnet coil, the spring overcomes the magnetic force and expands. According to the invention, a spring force- distance travelled characteristic curve (FWK) is adapted in such a way that it lies, for all relevant values of distance travelled, between a magnetic force- distance travelled characteristic curve with applied pick-up voltage (MWKA) and a magnetic force-distance travelled characteristic curve with applied maximum residual voltage (MWKR).

L'invention concerne une soupape à combustible (10) pour alimenter en combustible un appareil de chauffage auxiliaire dans un véhicule automobile. Cette soupape à combustible (10) comprend une bobine magnétique (12), un induit (14) et un ressort (16) qui peut être comprimé par application d'une tension de démarrage au niveau de la bobine magnétique et par l'intermédiaire de la force magnétique ainsi générée, cette force permettant un déplacement de l'induit. En présence d'une tension résiduelle maximale appliquée au niveau de la bobine magnétique, le ressort en expansion surmonte la force magnétique. Selon l'invention, une courbe caractéristique force du ressort-course (FWK) est adaptée de sorte qu'elle soit comprise pour toutes les valeurs de course appropriées entre une courbe caractéristique force magnétique-course en présence d'une tension de démarrage (MWKA) et une courbe caractéristique force magnétique-course en présence d'une tension résiduelle maximale (MWKR).

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