Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1996-06-13
1997-05-20
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
25112917, 251118, F02M 3302, F16K 3106
Patent
active
056304030
ABSTRACT:
The solenoid-operated valve's outlet port (26) is a tube having a thread (60) threaded into a threaded socket (66, 68) in a valve housing member (34). The valve seat (62) is at an end of the tube, and the extent to which the tube is threaded into the socket sets the position of the seat within the housing's interior (42). Once the position has been set, an adhesive sealant is applied and upon setting, forms a plug (164) which locks the tube in place and seals between the tube and the socket. The valve element (33) is spring-biased (160) closed on the seat, but when the solenoid is energized, it is unseated by the solenoid's armature (122) to which it is attached. The solenoid's stator (86, 88, 90) includes an annular shunt (90) which forms an air gap to the armature for the magnetic circuit that acts on the armature to unseat the valve element and which also holds the outer margin (154) of a diaphragm (124) sealed against the solenoid. The inner margin of the diaphragm is sealed to the armature. The diaphragm creates a space that is separated from the interior of the housing and to which vacuum at the outlet port is communicated via a passage (142) formed in the armature to provide force-balancing of the valve element. The outlet port also contains a sonic nozzle (28). The shunt is secured against the solenoid by tabs (102) at ends of the stator part (98) bent into interference with margins of notches (108) in the outer margin (104) of the shunt.
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Cook John E.
Van Kampen Leo
Moulis Thomas N.
Siemens Electric Limited
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