| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve torque in the low rotational speed area of an engine. <P>SOLUTION: This engine supercharging device 10 includes: a turbine 50 provided in an exhaust passage 24; a first impeller 60 provided in a first intake passage 26; a second impeller 70 provided in a second intake passage 28; a recirculation passage 30; and a first operating valve 34 and a second operating valve 35 which open/close the first intake passage 26 and recirculation passage 30. When the engine is operated in the rotational speed area after middle speed, the first operating valve 34 is opened and also the second operating valve 35 is closed, thereby the engine is supercharged by introducing compressed air from the first impeller 60 and the second impeller 70. Meanwhile, when the engine is operated in the low rotational speed area, the first operating valve 34 is closed and the second operating valve 35 is opened, thereby the engine is supercharged by introducing the compressed air from the second impeller 70 to the engine. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
