| 摘要 |
In an intake air control apparatus provided with a main throttle valve and a sub throttle valve, rotation of a rotating portion between an intermediate link lever support pin and a collar integrally formed with an intermediate lever can be stably maintained over a long period of time, so that the intermediate link lever can be rotationally controlled on the basis of a drive of a motor securely over a long period of time. A cam lever (9) screwed to a sub throttle shaft (8) driven by a motor (M) and a main throttle shaft (3) operated by a throttle drum (5) work together by an intermediate link (20). A wire bracket (6) supporting a valve opening wire (Wa) and a valve closing wire (Wb) is screwed to an outer end surface (1a) at a throttle drum side of a throttle body (1), and an intermediate link lever support pin (23) is provided so as to rise toward the throttle body (1) side on an inner end surface (6d) facing to the throttle body (1) of the wire bracket (6). An intermediate link lever (20) is rotatably borne to the intermediate link lever support pin (23) . The intermediate link lever (20) is arranged at the throttle body (1) side from the inner end surface (6d) of the wire bracket (6), and a rotating portion (R) of the intermediate link lever support pin (23) and the intermediate link lever (20) is arranged so as to face to the inner end surface (6d) of the wire bracket (6).
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