Intake device of internal combustion engine

Details Intake device of internal combustion engine Intake device of internal combustion engine

2011-03-01

2011-03-01

Huynh, Hai H (Department: 3747)

Internal-combustion engines

Intake manifold

C123S184420, C123S184470, C123S184530

Reexamination Certificate

active

07895984

ABSTRACT:
An intake passage is formed by connecting upper and lower cases10, 20of an intake manifold. The lower case10has a recessed portion50on an inner surface17a. The recessed portion50has a deep surface53to which a negative pressure outlet port42opens, and an opening51is provided in an upper portion of the recessed portion50. The upper case20has a projecting portion60extending further downwards towards the negative pressure outlet port42than mating surfaces10a,20aand projects into the recessed portion50through an opening52. The projecting portion60is positioned above the negative pressure outlet port42and between the negative pressure outlet port42and the inner surface17a. A lower end portion63of the projecting portion60is formed into an arc-like shape of which central portion65projects downwards.

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