| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize an exhaust turbo supercharger capable of switching supercharging performances with a simple and compact structure.SOLUTION: A first compressor vane 13 accommodated in an inner chamber 21 and a second compressor vane 14 accommodated in an outer chamber are disposed in a state of being superposed inside and outside, in a compressor housing 12 constituting an exhaust turbo supercharger 9. An intake outlet 23 of the inner chamber 21 and a second intake inlet 25 of the outer chamber 24 are communicated with each other through a communication passage 27. In the communication passage 27, a second intake outlet 26 is communicated by a bypass passage 28, and the bypass passage 28 can be opened and closed by a switch valve 29. High-pressure supercharging with compression in two stages by the first and second compressor vanes 13, 14, and low-pressure supercharging with compression by only the first compressor vane 13 are switched by operation of the switch valve 29. As the intake inlet, the intake outlet and the switch valve 29 are disposed one each, a structure can be simplified.</p> |
