| 摘要 |
PURPOSE:To permit two kinds of fuel to be injected in a laminar state without being mixed, by arranging first and second fuel passages intersecting and communicating to each other at the end portion of an injection valve body, and partially opening the intersecting portion toward the end portion of a needle valve. CONSTITUTION:At an injection stage, alcohol compresses light oil filled in a part of a first fuel passage 4, and increases pressure of the light oil. At this time, the light oil filled in a second fuel passage 5 is hindered from flowing by a check valve of a light oil pumping device. Accordingly, pressure of the alcohol supplied to the first fuel passage 4 is transmitted through an opening 8 at the intersection between the first and second fuel passages to the end of a needle valve 3. As a result, the needle valve 3 is gradually lifted to open an injection port 2. At this time, the light oil filled in a part of the first fuel passage 4 is first discharged, and then the alcohol is injected, thus achieving laminar injection. |
