| 摘要 |
<p>The discharge of a compressor in a turbo-compressor system is controlled in dependence on a pressure signal at (40) derived from the engine intake manifold. The high pressure discharge from the compressor at (20) leads to an opening (21) in a planar surface (22) of a housing (16), which opening is normally closed by a flexible diaphragm (48). The diaphragm is given rigidity by a piston (56) which is biased in the sense to cause the diaphragm to close the opening by a spring (60) acting through a retainer (64) which has limited scope for transverse movement in relation to the piston by virtue of a surrounding upstanding ring (58). If the vacuum in a chamber (54) on the upper side of the diaphragm is sufficient, the diaphragm can lift from the opening (21) to allow recirculation of the outlet air to the compressor inlet (18).</p> |
