| 摘要 |
Such an injection nozzle is used in air-compressing, direct- injection internal combustion engines with a combustion chamber arranged in the piston. It has a nozzle body (1) with a bore (2) for receiving a nozzle needle (3). In the rest position the latter bears on a needle seat (4), forming a seal, projects through an annular chamber (5) having an injection hole (6) and by means of a pin (8) closes a blind bore (7) having a further injection hole (9). When fuel is fed in the nozzle needle (3) lifts against the force of a spring (12) initially by a clearance amount (15) and frees the injection hole (6), additionally freeing the further injection hole (9) only as it lifts further against the force of an additional spring (13). In the lower speed and load range the fuel injection accordingly occurs only through the injection hole (6), thereby achieving a fuel atomisation which can be uncompromisingly performed without regard or detriment to the full load behaviour. <IMAGE> |
