| 摘要 |
In a gas inlet casing (27) of a turbocharger (10) that compresses combustion air for an internal combustion engine and forcibly feeds high-density air into a combustion chamber of the internal combustion engine, a space formed between an inner casing (21) and an outer casing (22) is configured to serve as a first exhaust gas channel (26) for guiding exhaust gas discharged from the internal combustion engine to the outer periphery side of a turbine nozzle (25). A second exhaust gas channel (36) for guiding exhaust gas that branches at an intermediate point in the first exhaust gas channel (26) to the inner periphery side of the turbine nozzle (25) is formed at the inner periphery side of the inner casing (21). An intermediate portion of the first exhaust gas channel (26) and a gas inlet of the second exhaust gas channel (36) are communicated through an exhaust gas pipe (38), and an on/off valve (41) is connected at an intermediate point thereof. This can reduce the manufacturing costs and maintenance costs with a simple structure and enhances the performance of the turbine. |
