| 摘要 |
PURPOSE:To lower the level of pressure fluctuation of intake air and to thereby prevent degradation of the centering action to a sleeve, by communicating an intake passage of an air pump with an air journal chamber of the air chamber via a connecting passage having a surge tank, and providing a check valve in said connecting passage on the downstream side of the surge tank. CONSTITUTION:In case that fluctuation of pressure is produced through opening and closing of a rotary valve 14 and the pressure of intake air becomes higher than a predetermined value, part of intake air is relieved from a check valve 13 to the side of a surge tank 11, so that so high pressure waves are not transmitted to the side of an air pump 20. High-pressure air introduced into the surge tank 11 is carried into an air journal chamber 28 of the air pump 20 and enhances the effect of pneumatic bearing. |
