| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a variable turbosupercharger performing accurate control and improving reliability by improving control characteristics, and providing reduced size. <P>SOLUTION: A hydraulic servo driving device 30 driving the swing mechanism of the variable turbosupercharger is composed of a servo piston 31 coupled to the drive shaft 21 of the swing mechanism and a pilot spool 36 stored in the center hole 34 of the servo piston 31 and slid by pilot pressure. A first hydraulic chamber 47 and a second hydraulic chamber 48 into/out of which oil is led or flow are arranged in a housing 33. A pressure port 51 for oil inflow from the outside, a first piston port 53 communicating between the center hole 34 and the first hydraulic chamber 47, a second piston port 54 communicating between the center hole 34 and the second hydraulic chamber 48, and a return port 52 for oil outflow are individually provided into the servo piston 31. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
