| 摘要 |
<p>PURPOSE:To change throttling characteristics against negative pressure with a simple structure by changing pressure which is impressed upon a throttle modulator in accordance with an adjusting condition of a vacuum modulator. CONSTITUTION:A vacuum pump 10 as a negative pressure source is connected to a diverging point 21 through a line 11. The diverging part 21 is connected to each of a negative pressure multiplying device 14, a throttle modulator 19, a vacuum modulator 23. That is to say, the diverging part 21 is not only connected with the negative pressure multiplying device 14 through a check valve 13 but is connected with the vacuum modulator 25 through a line 22 and with the throttle modulator 19 through a line 25. The degree of connection between the vacuum pump 10 and an atmospheric pressure part which is adjusted by the vacuum modulator 23 changes pressure to be impressed upon the throttle modulator 19 corresponding to the adjusting condition of the vacuum modulator 23.</p> |
