Throttle device

A throttle device mountable on a multiple cylinder engine having an intake port, the throttle device comprising:

• a first throttle body having a first intake passage formed therein;
• a second throttle body having a second intake passage adjacent to the first intake passage formed therein;
• a first throttle valve rotatably provided in the first intake passage;
• a second throttle valve rotatably provided in the second intake passage;
• a throttle shaft supporting the first throttle valve and the second throttle valve;
• an actuator that drives the throttle valve to open and close through the throttle shaft;
• a rotation transmission mechanism interposed between the actuator and the throttle shaft;
• a displacement transmission mechanism connected to the throttle shaft and transmits a rotational displacement of the throttle shaft to a predetermined detection position;
• and
• a throttle opening degree sensor to detect the opening degree of the throttle valve the displacement transmission mechanism, wherein
• the rotation transmission mechanism is disposed at a position where the first throttle body and the second throttle body are adjacent,
• the actuator is disposed within an installation width of either one of the first and the second throttle bodies,
• the throttle opening degree sensor includes a movable side detection element and a fixed side detection element, the movable side detection element being integrally supported by one end of the throttle shaft through the displacement transmission mechanism, the throttle opening degree sensor disposed within an installation width of other one of the first and the second throttle bodies and
• the displacement transmission mechanism is connected to the throttle shaft at an end portion side where the other one of the first and the second throttle bodies is not adjacent to the either one of the first and the second throttle bodies and the displacement transmission mechanism transmits a rotational displacement of the throttle shaft to the throttle opening degree sensor.