Patent ID: 7946267

Claim:
An intake device of an internal combustion engine, comprising: an upper case having an upper side wall and a ceiling wall, and a lower case having a lower side wall and a bottom wall, the lower case and the upper case being connected together to form an intake passage with a lower portion of the upper side wall disposed next to an upper portion of the lower side wall in a vertical direction, wherein the lower side wall has a recessed portion formed on an inner surface thereof, the recessed portion defining a recessed surface extending from the upper portion of the lower side wall toward the bottom wall, wherein a negative pressure outlet port for taking out negative pressure generated in the intake passage opens into the recessed portion, and wherein the upper side wall has a projecting portion which projects downwards from the lower portion of the upper side wall into the recessed portion towards the negative pressure outlet port, the projecting portion being positioned horizontally between the negative pressure outlet port and the inner surface.