| 摘要 |
PURPOSE:To certainly permit laminar injection without mixing a plural kinds of fuel by installing a fuel sump and a communication passage which is opened to the fuel sump. CONSTITUTION:When a fuel injector is put into injection cycle, the pressurized alcohol by an injection pump 24 pressurizes the light oil filling a fuel sump 8 and a lateral hole 9 and returns the light oil and raises a needle valve 3. When said needle valve 3 is raised, the cylindrical surface part under the annular groove 11 of the needle valve 11 closes a lateral hole 14, and the communication between the second fuel passage 5, lateral hole 14, and the annular groove 11 is intercepted. Owing to the cut-off of the light oil passage, the light oil filling the fuel sump 8 is jetted-out from an injection port 2 at the initial stage of injection, and then alcohol is jetted-out, and laminar injection is realized. |
