| 摘要 |
<p>The injector body (2) has a fuel inlet pipe (4) leading to a cavity (3). The fuel passes from the cavity to the combustion chamber via a channel (6) which can be blocked by a needle valve, when the end (9) of the needle (8) is in contact with the seating (5). The valve is opened, against pressure developed by a spring (10) and electromagnet (11), by the fuel pressure in the cavity (3). The electromagnet armature (20) is mounted on the needle shaft. The current through the coil (19) is varied by a control unit (14) and synchronised with the engine rotation by a cam (18) which operates a microswitch (15).</p> |
