| 摘要 |
<p>This invention concerns a fuel injection nozzle that ensures enlargement of the joining angle (30) of a sharp-edged corner (29) formed in that section of the fuel intake channel (17) opening to the pressure chamber (5), which constitutes the most critical area with respect to fatigue strength, in high pressure fuel injection systems used in the internal combustion engines. As the fuel intake channel (17) starts with a smaller diameter (19) on top (18) of the injector body, reaching a larger diameter (21) at the 15 joining cross-section (20) with the pressure chamber (5), the angle (30) at the joining corner (29) becomes greater than the angle (31) at the joining corner (16) of a cylindrical fuel intake channel (12) with the pressure chamber (6) in a usual injector body (1), which, in turn, ensures that a less vulnerable joining corner (16,29) with a wider angle (30,31) and reduced sharpness be obtained relative to a cylindrical fuel intake channel (12) in today's application. Thus, it will be ensured that a less stress build-up occur at the joining corner (29) of the conical fuel channel (17) with the pressure chamber (5) under the influence of high fuel pressure and hence it will be possible to increase the injector life without occurrence of any breakage at the critical cross-section.</p> |
