| 摘要 |
PURPOSE:To enable to injecto two different types of liquid in the form of layers without mixing them together, by forming a hollow space respectively at a position near the sealing portion of a needle valve and at a position near the outlet of a main liquid passage, and communicating these two hollow spaces with each other via a connecting portion consisting of a small gap. CONSTITUTION:Since the pressure of alcohol is transmitted from an opening 15 to a hollow space 16, a connecting portion 19 and a hollow space 18 successively, the internal pressure of the hollow space 18 is increased. When the internal pressure of the hollow space 18 is raised to a prescribed value, a needle valve 2 is raised upward against the force of a spring which urges the needle valve 2 downward and it is moved away from a seat portion 11, so that gas oil reserved in the hollow space 18 is at first injected from an injection port 13 and then alcohol is injected. That is, gas oil is injected in the form of layers prior to injection of alcohol. |
