Patent ID: 7455044

Claim:
An intake device of an internal combustion engine, comprising: an air intake passage leading to a combustion chamber of the engine through an intake valve; a fuel injection valve provided in the air intake passage to inject a fuel into the air intake passage; and an intake control valve arranged in the air intake passage at a position upstream of the fuel injection valve, wherein the intake control valve comprises: a given portion defined by the air intake passage; a pivot shaft passing through the given portion; a valve plate secured to the pivot shaft to pivot therewith within the given portion, the valve plate being pivotal between a close position to close the air intake passage and an open position to open the air intake passage; and an arrangement that provides, when the valve plate assumes the close position, an interior of the air intake passage downstream of the valve plate with mutually isolated first and second air flows that are separated and oriented to enhance a flow of air/fuel mixture in the combustion chamber, wherein the arrangement comprises: upper side open portion that is provided when the valve plate assumes the close position, the upper side open portion being a given cut formed in an upper right half portion of the valve plate; and a lower side open portion that is provided when the valve plate assumes the close position, the lower side open portion being an open portion provided at an opposite position of the given cut with respect to an axial center line of the air intake passage, wherein a flow passage sectional area of the lower side open portion is smaller than that of the upper side open portion.