BRENSLEINSPRUTNINGSMUNSTYCKE

摘要

A direct-injection internal combustion engine has a combustion chamber in the form of a body of rotation in the piston head. Means are provided for creating air swirl about the longitudinal axis of the combustion chamber. A fuel-injection nozzle is arranzed to spray fuel on the combustion chamber wall substantially as a film at upper engine speeds and loads, and to mix the fuel directly with the air at idling and lower engine speeds and loads. The nozzle has a nozzle needle longitudinally movable in a nozzle body to open the nozzle for fuel injection. In order to reduce the size of the nozzle, the nozzle needle is arranged to move in a direction outwardly of the nozzle body to open the nozzle and inwardly of the nozzle body to close the nozzle. The nozzle is adapted to open at a slower rate at lower engine speeds and loads and at a faster rate at upper engine speeds and loads.