| 摘要 |
The invention relates to an exhaust-gas turbocharger (1) for an internal combustion engine (2) having an intake duct (3) for air and having an exhaust duct (5) and having a turbine (6) arranged in the exhaust duct and having a compressor wheel (4) arranged in the intake duct, which turbine and compressor wheel are both arranged on a common shaft (24), wherein the exhaust duct has a spiral housing (7) which coaxially surrounds the turbine (6), and wherein, between the spiral housing and the turbine, there is provided a ring-shaped gap (8) through which the exhaust-gas flow flows circumferentially to the turbine, and wherein, in the ring-shaped gap, there are arranged guide blades (9, 9 ', 9'', 9'"', 10, 11) which can be rotated about an adjustment axis (12) by way of an adjustment mechanism (12, 17) for the purposes of controlling the flow resistance. To be able to compensate thermal expansion and shrinkage of the guide blades under different operating conditions, it is provided according to the invention that the adjustment mechanism of the guide blades (9, 9', 9'', 9'"', 10, 11) additionally has a displacement mechanism (18, 18a, 18b, 20, 21, 22) for the displacement of the guide blades (9, 9', 9'', 9''', 10, 11) in the ring-shaped gap (8). The displacement mechanism may be directly coupled to the adjustment mechanism. |
