| 摘要 |
PURPOSE: To obtain an increase in SAC pressures without leakage or expansion of the plungers by forming a timing fluid chamber between upper and intermediate plungers and arranging a spring between intermediate and lower plungers. CONSTITUTION: A variable timing fluid chamber 21 is formed between an upper plunger 13 and an intermediate plunger 11. An injection chamber 41 is formed under a lower plunger 9. A single spring 19 is arranged between the intermediate plunger 11 and the lower plunger 9. The rise of the lower plunger is controlled by pushing the intermediate plunger 11 upward. Thus, it is possible to obtain an increase in SAC pressures without leakage or expansion of the plungers. |
