| 摘要 |
<p>PURPOSE:To reliably execute the movement control of a control spool by placing required signal pressure in a control pressure chamber under the wide range control from a value corresponding to that in a low pressure area to a value corresponding to that in a high pressure area. CONSTITUTION:A control valve 400 which controls the signal pressure supplied to a control pressure chamber 200 has a low pressure intake passage 404 communicated with the intake portion of a compressor to supply a low pressure therein, a high pressure passage 403 communicated with the high pressure portion of the compressor to supply a high pressure therein, and a signal pressure passage 402 communicated with the control pressure chamber. In addition, said control valve 400 has a primary valve seat face 405 formed between said signal pressure passage 402 and the low pressure intake passage 404, and a secondary valve seat face 406 formed between the signal pressure passage 402 and the high pressure intake passage 403 and opposed to the primary valve seat face 405, and a control valve body 409 placed between the primary and the secondary valve seat face 405 and 406.</p> |
