US 6,982,619 B2 | ||
Solenoid stator assembly having a reinforcement structure | ||
Randy Nussio, Grand Rapids, Mich. (US) | ||
Assigned to Robert Bosch GmbH, Stuttgart (Germany) | ||
Filed on Feb. 07, 2003, as Appl. No. 10/361,124. | ||
Prior Publication US 2004/0155740 A1, Aug. 12, 2004 | ||
Int. Cl. H01F 7/08 (2006.01) |
U.S. Cl. 335—262 | 14 Claims |
1. A solenoid stator assembly for an electromechanically actuated fuel injector, the solenoid stator assembly comprising:
a permeable stator core having a central pole piece and an outer pole piece, each pole piece terminating at a pole face;
a stator coil with a central axis comprising conductor windings about the stator core central pole piece, the stator coil
being insulated with respect to the stator core and having a pair of leads;
a housing formed of an electrically insulating material, the housing having a wall with a mounting end and a closed end, the
wall defining an internal cavity for enclosing the stator core and stator coil therein such that the pole face of the stator
core central pole piece is oriented proximate to the mounting end of the housing, which forms a mounting surface about the
periphery of the wall, the stator assembly being attachable to a fuel injector such that the mounting surface sealingly engages
a corresponding fuel injector surface, the pole face of the stator core central pole piece being proximate to an armature
of the fuel injector;
the insulating material engaging an outer surface of the stator core whereby the stator core is secured firmly to the housing;
an elongate reinforcement structure disposed within the insulating material of the housing whereby the reinforcement structure
is enveloped by the insulating material, the reinforcement structure being positioned generally about the stator core for
structurally enhancing the housing;
the reinforcement structure extending in the direction of the central axis and from the mounting end of the housing to the
closed end of the housing; and
a pair of electrical terminals extending into the housing, each terminal being connected to one of the pair of leads of the
stator coil for conducting an electrical current therethrough to generate a flux field that electro-mechanically actuates
the fuel injector armature.
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