| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbocharger wastegate structure capable of regulating a flow of exhaust gas flowing into an exhaust bypass passage by a valve element when a valve is opened, and preventing a turbine housing from turning into a locally overheated state in a specific region having low heat radiation.SOLUTION: A turbocharger wastegate structure includes: a valve element 31 that can open/close an opening end portion 22a of an exhaust bypass passage formed in a turbine housing 11; a supporting arm 32 supporting the valve element 31, and supported rotatably with respect to the turbine housing 11 via a rotary shaft 33; and a valve-element operation mechanism 30 opening/closing the valve element 31 together with the supporting arm 32 via the rotary shaft 33. The valve-element operation mechanism 30 executes a slide operation for sliding the valve element 31 so as to approach an inner wall surface 11a of the turbine housing 11 in a radial direction of the valve element 31 when the valve element 31 moves from a valve closing position toward a valve opening position, and a revolution operation for revolving the valve element 31 from the valve closing position to the valve opening position. |
