Intake air control device having strain absorbing structure

An intake air control device that is mounted to a fixed member, the intake air control device comprising:

• a throttle body that defines an intake air passage;
• and
• a throttle valve that is rotatably supported in the throttle body, the throttle valve controlling an amount of intake air flowing through the intake air passage,
• wherein the throttle body includes a cylindrical portion, a plurality of fixed portions, and a strain absorbing portion,
• the cylindrical portion defines the intake air passage that accommodates the throttle valve,
• the plurality of fixed portions are connected to the fixed member,
• the strain absorbing portion connects the cylindrical portion with the plurality of fixed portions, the strain absorbing portion absorbing displacement arising in the plurality of fixed portions, and
• he strain absorbing portion is a deformable connecting arm that connects to the cylindrical portion in a location, which is apart from a radially inner periphery of the plurality of fixed portions, and further comprising:
• a flange that includes the plurality of fixed portions,
• wherein the strain absorbing portion includes the flange and an axial arm,
• the axial arm extends in an axial direction of the cylindrical portion from a portion of the flange that is arranged between the plurality of fixed portions, and
• the axial arm connects to the cylindrical portion.

An intake air control device that is mounted to a fixed member, the intake air control device comprising:

• a throttle body that defines an intake air passage;
• and
• a throttle valve that is rotatably supported in the throttle body, the throttle valve controlling an amount of intake air flowing through the intake air passage,
• wherein the throttle body includes a cylindrical portion, a plurality of fixed portions, and a strain absorbing portion,
• the cylindrical portion defines the intake air passage that accommodates the throttle valve,
• the plurality of fixed portions are connected to the fixed member,
• the strain absorbing portion connects the cylindrical portion with the plurality of fixed portions, the strain absorbing portion absorbing displacement arising in the plurality of fixed portions, and
• the strain absorbing portion is a deformable connecting arm that connects to the cylindrical portion in a location, which is apart from a radially inner periphery of the plurality of fixed portions, and further comprising:
• a plurality of bolts that includes a plurality of bolt heads, which is fixed to the plurality of fixed portions;
• a plurality of washers that is inserted between the plurality of bolt heads and the plurality of fixed portions;
• and
• a compositely fixed member that is fixed compositely with the plurality of fixed portions using the plurality of bolts,
• wherein the throttle body defines a gap forming recess that is arranged between the plurality of fixed portions and the cylindrical portion, and
• the gap forming recess restricts the plurality of bolt heads, the plurality of washers, and the compositely fixed member from interfering with the cylindrical portion other than via the strain absorbing portion.