Internal-combustion engines – Poppet valve operating mechanism – Electrical system
Reexamination Certificate
2000-01-24
2001-06-19
Lo, Weilun (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Electrical system
C251S129010, C251S129100, C251S129160
Reexamination Certificate
active
06247431
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic valve actuating apparatus for opening and closing a valve such as an intake valve or an exhaust valve of an internal combustion engine.
A Japanese Patent Kokai Publication No. H09(1997)-60512 discloses an electromagnetic valve actuating system including an armature and an armature shaft (or valve stem) which are fastened together through a two-split cotter.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an electromagnetic valve actuating apparatus having a reliable joint structure.
According to the present invention, a valve actuating apparatus for an internal combustion engine, comprises an armature and an armature shaft joined with the armature, for transmitting movement of the armature to a valve. The armature has a tapered joint hole, and the armature shaft has a tapered joint portion joined with the armature by fitting in the joint hole of the armature.
According to another aspect of the invention, the armature has a center portion, and the armature shaft has a joint portion which is joined with the center portion of the armature by friction welding. The joint portion of the armature shaft may be fit in a joint hole formed in the center portion of the armature.
REFERENCES:
patent: 4087038 (1978-05-01), Yagi
patent: 5095856 (1992-03-01), Kawamura
patent: 5690064 (1997-11-01), Izuo
patent: 5704314 (1998-01-01), Allmendinger et al.
patent: 6031303 (2000-02-01), DeGrace
patent: 6079609 (2000-06-01), Fochtman
patent: 197 28 348 (1999-01-01), None
patent: 0 922 520 (1999-06-01), None
patent: 0 922 526 (1999-06-01), None
patent: 9-60512 (1997-03-01), None
Konno Tsuneo, “Valve System For Internal Combustion Engine.”, Patent Abstracts of Japan, #09060514, Apr. 3, 1997.
Foley & Lardner
Lo Weilun
Nissan Motor Co,. Ltd.
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