In a throttle device including: a throttle shaft to which a throttle valve is secured; a motor; and a deceleration mechanism decelerating rotation of a drive shaft of the motor and transmitting the rotation to the throttle shaft, the deceleration mechanism includes a throttle gear secured to the throttle shaft, the throttle gear includes a tubular ring into which the throttle shaft is detachably inserted and a gear main body including a gear portion, and the gear main body is formed of a resin by insert processing including the ring.

An air intake device includes: an air intake port; and a valve that includes an elastically deformable seal portion disposed in a side end portion, and switches between flow paths of the air intake port by being turned around a turning shaft, wherein the side end portion of the valve is provided with a curved side end portion that extends from one end portion side to the other end portion side along an extension direction of the turning shaft while being curved.

An intake device includes: a plurality of intake ports which are adjacent to each other with a partition wall interposed therebetween; a valve body provided for each of the plurality of intake ports; a rotating shaft which rotates along with the valve body; and a bearing member which is disposed between the intake ports adjacent to each other and rotatably supports the rotating shaft of the valve body, wherein the bearing member includes a bearing main body having a bearing hole which rotatably supports the rotating shaft, and an arm portion which extends in a length larger than an inner diameter of the bearing hole from the bearing main body along the partition wall between the intake ports adjacent to each other and configures a bearing-side welding portion.

Provided is a throttle device including two throttle bodies having motors that face to each other, in which the wiring base member is compactly placed. A throttle device 1 includes first and second throttle bodies 2 and 3. The first and second throttle bodies 2 and 3 each include a gear case 10 that houses a deceleration mechanism 9 that transmits the rotational force of the motor 8 to the throttle shaft 6. A wiring base member 7 having a power coupler 14 is fixed between the first and second throttle bodies 2 and 3 while being placed between these gear cases 10. The wiring base member 7 has wiring 32 embedded therein, the wiring 32 connecting the motor terminal 25 of each motor 8, the motor terminal 25 protruding into the gear case 10, and the power coupler 14.

Present embodiments relate to an electronic fuel injection throttle body assembly for an internal combustion engine. More specifically, but without limitation, present embodiments relate to an improved electronic fuel injection (EFI) throttle body which has a remote communication capability as well as improved throttle position sensing.