| 摘要 |
A variable geometry exhaust turbocharger, wherein bolts which fasten a variable nozzle mechanism do not loosen. A variable geometry exhaust turbocharger is provided with a turbine housing (1), a turbine rotor (3), a turbine shaft (3A), a bearing (5) for supporting the turbine shaft, a bearing housing (4), and a variable nozzle mechanism (8) for regulating the flow of exhaust gas. The variable nozzle mechanism (8) is provided with a nozzle (6), a nozzle mount (7), a lever plate (11), and a drive ring (10). A nozzle plate (9) with which the tip of the nozzle (6) makes contact is provided to an inner tube section (1a) of the turbine housing (1). A sleeve member (12) is provided between the nozzle mount (7) and the nozzle plate (9) so as to be coaxial with a through-hole (7a) and a screw-through hole (9a). The nozzle mount (7) and the nozzle plate (9) are connected together by fastening bolts (B) passed through the through-hole (7a), the sleeve member (12), and the screw through-hole (9a), in that order. The thickness of that portion of the sleeve member (12) which is in contact with the nozzle mount (7) and the nozzle plate (9) is greater than the thickness of the center portion of the sleeve member (12). |
