| 摘要 |
In order to ensure injection of high quantity of fuel from injector in internal combustion engines, there are systems containing two rows of holes provided in the nozzle on top of each other relative to injector axis and consisting of one outer needle and one inner needle which separately control opening and closing of such holes. The purpose of the invention explained herein is to convert a coaxial dual-needle (5, 6) system into an incomplicated, simplified structure. In the system explained in this invention, out of such coaxial needles, the outer needle (5) is controlled by a spring (12), while the inner needle (6) is controlled through capillary channels (9) creating throttling effect, which interconnect the volume (8) provided over the needle with the fuel channel (10) in the main injector. If desired, to control the inner needle (6), a small spring (1 1 ) can also be added to the volume (8) provided at the upper side of inner needle. It will be possible that an injector-nozzle system to be thus obtained be used extensively without any major modification since it is similar to usual standard single-needle systems. |
