Internal-combustion engines – Intake manifold – Multiple passage leading to inlet of one cylinder
Reexamination Certificate
2005-05-03
2005-05-03
McMahon, Marguerite (Department: 3747)
Internal-combustion engines
Intake manifold
Multiple passage leading to inlet of one cylinder
C123S306000, C123S193500
Reexamination Certificate
active
06886516
ABSTRACT:
A cylinder head of an internal combustion engine comprises a structure cast in metal, the structure defining therein an intake port and having a side wall surface from which an upstream end of the intake port is exposed to the outside; and a partition plate of metal installed in the intake port to divide the same into two parallel intake conduits, the partition plate having lateral edges which are embedded in an inner wall of the intake port. The partition plate has an upstream edge which includes a major straight portion and two projected end portions which are provided on both ends of the major straight portion respectively, and the major straight portion is positioned inside relative to the side wall surface and the two projected end portions have upstream edges which are embedded in the inner wall of the intake port and machined to be flush with the side wall surface.
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Foley & Lardner LLP
McMahon Marguerite
Nissan Motor Co,. Ltd.
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