Fuel injector for internal combustion engine, has injection orifice, where inner wall of orifice includes large number of bowl-shaped cavities for creating turbulent boundary layer, where depth of cavities is less than fifty micrometer
摘要
<p>The injector has a body (1) provided with an injection orifice (7) and a pressure chamber formed in the body. The orifice leaves from the chamber in order to eject the fuel from the chamber across the orifice. The orifice includes an inlet orifice (107) and an outlet orifice (207) and an inner wall (17) connecting the inlet orifice to the outlet orifice. The inner wall of the orifice includes a large number of cavities (30) in the shape of a bowl for creating turbulent boundary layer, where depth of the cavities is less than 50 micrometer.</p>
