ELECTRONIC THROTTLE

PROBLEM TO BE SOLVED: To solve the problem that in the conventional electronic throttle, sliding hysteresis torque due to contact of a coil part of a second spring with an inner circumferential guide of a throttle gear is generated, and return margin torque of a throttle valve between an enclosed opening to an opener opening in which evacuation travel is allowed is lowered, thus this afgfects evacuation travel performance when an electronic throttle fails.SOLUTION: In an electronic throttle, a second spring 12 is arranged at an outward side in a radial direction from a coil part 13 of a first spring 11, so that the second spring 12 does not slide with an inner circumferential guide 23 of a throttle gear 8, thus coating with a lubricant for decreasing sliding hysteresis torque is unnecessary. This makes it possible to decrease manufacturing cost and facilitates local procurement in foreign countries. The axial length of a coil spring 5 can be shortened, allowing an intake throttle valve to be compact. Furthermore, a safe evacuation travel performance can be secured when the electronic throttle fails.