Patent ID: 7895989

Claim:
A butterfly-type throttle valve comprising: a valve shaft extending across an intake air passage of an internal combustion engine; a butterfly-type valve body constructed to enable adjustment of a flow rate of intake air flowing through the intake air passage by rotating in unison with the valve shaft, the valve body comprising a plurality of first split members jointly defining an axial bore for fitting with the valve shaft; a first coupling device including no screw and constructed to couple the split members together; and a gap closing member disposed on a peripheral edge portion of the valve body, wherein the gap closing member is constructed to close a gap that is produced between the valve body and a passage wall surface of the intake air passage when the valve body is in a fully closed position; wherein: the valve body further includes a plurality of second split members constructed to jointly define a peripheral edge groove portion of the valve body, the peripheral edge groove portion being configured to be able to be fitted with the gap closing member; and the throttle valve further comprises a second coupling device constructed to couple the second split members together.