Abstract: An injection device for administering a reagent into an exhaust chamber of an internal combustion engine, comprising a device inlet and a device outlet and a sub-assembly held securely within a device housing. The sub-assembly comprises (i) valve housing defining a valve seat, (ii) valve means movable outwardly from the valve housing, away from the valve seat, to permit the reagent to be delivered into the exhaust chamber through the device outlet, whereby a force is applied to the valve means due to reagent delivered to the device inlet which serves to urge the valve means away from the valve seat, and (iii) bias means for applying a biasing force to the valve means which serves to urge the valve means against the valve seat so as to prevent delivery of the reagent through the device outlet into the exhaust chamber.

Abstract: An injection nozzle for an internal combustion engine includes a nozzle body having a first nozzle outlet, a second nozzle outlet and a delivery chamber for fuel, an outer valve needle engageable with an outer valve seating to control fuel injection through the first nozzle outlet and an inner valve needle engageable with an inner valve seating to control fuel injection through the second nozzle outlet. The outer valve needle is provided with an axial bore within which the inner valve needle is slidable. The injection nozzle further includes a sleeve member coupled to the inner valve needle and a ring member coupled to the outer valve needle, wherein the ring member is brought into engagement with the sleeve member when the outer valve needle is moved axially through a distance that is greater than a predetermined distance ‘L’ so as to cause axial movement of the inner valve needle.

Abstract: An injection device for administering a reagent into an exhaust chamber of an internal combustion engine, comprising a device inlet and a device outlet and a sub-assembly held securely within a device housing. The sub-assembly comprises (i) valve housing defining a valve seat, (ii) valve means movable outwardly from the valve housing, away from the valve seat, to permit the reagent to be delivered into the exhaust chamber through the device outlet, whereby a force is applied to the valve means due to reagent delivered to the device inlet which serves to urge the valve means away from the valve seat, and (iii) bias means for applying a biasing force to the valve means which serves to urge the valve means against the valve seat so as to prevent delivery of the reagent through the device outlet into the exhaust chamber.

Abstract: An injection nozzle for an internal combustion engine, the injection nozzle including an outer valve needle which is engageable with an outer valve seating so as to control injection through a first nozzle outlet, an inner valve needle which is movable within the outer valve needle and engageable with an inner valve seating so as to control injection through a second nozzle outlet, and a coupling arrangement for coupling movement of the outer valve needle to the inner valve needle in circumstances in which the outer valve needle is moved away from the outer valve seating beyond a predetermined amount, thereby to permit fuel injection through both the first and second nozzle outlets.

Abstract: An injection nozzle (10), for use in a fuel injector for an internal combustion engine, has an inner valve needle (26) which is engageable with an inner valve seating (24, 58) to control fuel delivery through one or more first nozzle outlets (14), and an outer valve (28) which is engageable with an outer valve seating (24, 70) to control fuel delivery through one or more second outlets (16). The outer valve (28) is provided with a valve bore (36) within which at least a part of the inner valve needle (26) is received. Coupling means (46, 48) are provided for coupling movement of the inner valve needle (26) to the outer valve (28) in circumstances in which the inner valve needle (26) is moved away from the inner valve seating (24, 58) through an amount exceeding a predetermined threshold amount (D). This allows the outer valve (28) to be lifted away from the outer valve seating (24, 70) to provide an increased injection rate.

Abstract: An injection nozzle (10), for use in a fuel injector for an internal combustion engine, has an inner valve needle (26) which is engageable with an inner valve seating (24, 58) to control fuel delivery through one or more first nozzle outlets (14), and an outer valve (28) which is engageable with an outer valve seating (24, 70) to control fuel delivery through one or more second outlets (16). The outer valve (28) is provided with a valve bore (36) within which at least a part of the inner valve needle (26) is received. Coupling means (46, 48) are provided for coupling movement of the inner valve needle (26) to the outer valve (28) in circumstances in which the inner valve needle (26) is moved away from the inner valve seating (24, 58) through an amount exceeding a predetermined threshold amount (D). This allows the outer valve (28) to be lifted away from the outer valve seating (24, 70) to provide an increased injection rate.

Abstract: An injection nozzle for an internal combustion engine includes a nozzle body having a first nozzle outlet, a second nozzle outlet and a delivery chamber for fuel, an outer valve needle engageable with an outer valve seating to control fuel injection through the first nozzle outlet and an inner valve needle engageable with an inner valve seating to control fuel injection through the second nozzle outlet. The outer valve needle is provided with an axial bore within which the inner valve needle is slidable. The injection nozzle further includes a sleeve member coupled to the inner valve needle and a ring member coupled to the outer valve needle, wherein the ring member is brought into engagement with the sleeve member when the outer valve needle is moved axially through a distance that is greater than a predetermined distance ‘L’ so as to cause axial movement of the inner valve needle.

Abstract: An injection nozzle for an internal combustion engine, the injection nozzle including an outer valve needle which is engageable with an outer valve seating so as to control injection through a first nozzle outlet, an inner valve needle which is movable within the outer valve needle and engageable with an inner valve seating so as to control injection through a second nozzle outlet, and a coupling arrangement for coupling movement of the outer valve needle to the inner valve needle in circumstances in which the outer valve needle is moved away from the outer valve seating beyond a predetermined amount, thereby to permit fuel injection through both the first and second nozzle outlets.