Patent ID: 8025042

Claim:
An intake flow control device for an internal combustion engine comprising: a plurality of valve units for changing intake flow, the valve unit including a tubular housing defining an intake passage therein, wherein the housing is disposed in an intake manifold such that an outer face of the housing is contact with an inner face of the intake manifold, a valve shaft supported between side walls of the housing, and a valve mounted to the valve shaft so as to open or close the intake passage; a drive shaft connecting the valve shafts of the valve units to rotatably drive the valve shaft, the drive shaft extending in a shaft extending direction; and an actuator directly connected to the drive shaft so as to drive the valve units to open or close, wherein the valve has side clearances on both side ends in the shaft extending direction, each side clearance being defined between a respective said side end of the valve and an inner side wall of the housing in the shaft extending direction, and the valve has a width defined between the side ends of the valve in the shaft extending direction, which is larger than a width in the shaft extending direction defined between inner side walls of the intake manifold located at an upstream side of the valve.