US Patent 7219653 Electronic control throttle body

An electronically controlled throttle body has a torque motor including a stator and a moving portion (a slider), and a throttle shaft which is rotated by the torque motor. A rack as a plurality of gear teeth is formed at the moving portion, and a gear which mates with the rack is disposed at the throttle shaft. By arranging the radius of the gear appropriately to the reciprocating range of the slider, the motion of the slider is transmitted to the throttle shaft effectively. Therefore, the electronically controlled throttle body, can efficiently transmit motion of the torque motor, including a linear type, to the throttle shaft with a simple structure.