| 摘要 |
An injection device for administering a reagent into an exhaust passage of an internal combustion engine, the injection device having an axis (A) along its length and comprising an outwardly opening valve member (14) having a seating surface which is engageable with a valve seating region (30). A seating member provided with an internal bore (12) which defines the valve seating region (30), wherein the internal bore (12) further defines a flow re-directing region (32) downstream of the valve seating region (30). The seating member (10) has an end face (36; 136) provided with a feature (38; 138; 238; 338; 438; 538) which intersects with at least a portion of the flow re-directing region (32) to define, together with the flow re-directing region (32), a spray path for reagent exiting the injection device when the valve member (10) is moved outwardly from the bore (12) away from the valve seating region (30). The spray path has a variable spray angle, relative to the axis A, around the circumference of the valve seating region (30). |
