초록 ▼

A fuel injection device for internal combustion engines having a magnet valve that has a damping chamber and a relief chamber which communicate hydraulically through a damping throttle that damps in both laminar and turbulent fashion. As a result, the waviness of the characteristic curves of the fue

A fuel injection device for internal combustion engines having a magnet valve that has a damping chamber and a relief chamber which communicate hydraulically through a damping throttle that damps in both laminar and turbulent fashion. As a result, the waviness of the characteristic curves of the fuel injection system is reduced and its function is improved.

대표청구항 ▼

1. A fuel injection device, comprising a magnet valve (24) for controlling fuel flows, which valve, in at least one of its positions, closes a damping chamber (40) in the magnet valve (24) that communicates constantly with a relief chamber (41) via a damping throttle, said damping throttle being ada

1. A fuel injection device, comprising a magnet valve (24) for controlling fuel flows, which valve, in at least one of its positions, closes a damping chamber (40) in the magnet valve (24) that communicates constantly with a relief chamber (41) via a damping throttle, said damping throttle being adapted to throttle in both laminar fashion (49) and turbulent fashion (39), wherein said damping throttle is embodied in a support plate (38), which support plate is disposed between the damping chamber (40) and the relief chamber (41) and which closes off the damping chamber (40) toward the relief chamber (41).2. The fuel injection device of claim 1, wherein said turbulent throttle (39) of the damping throttle is embodied in the form of a through bore (45) that connects the damping chamber (40) and the relief chamber (41).3. The fuel injection device of claim 2, wherein said through bore (45) has a countersunk recess (47) on at least one end.4. The fuel injection device of claim 3, wherein said support plate (38), on its side toward the damping chamber (40), has at least one indentation (51), which with the magnet valve (24), in particular the electromagnet (29) of the magnet valve (24), forms a gap (49).5. The fuel injection device of claim 2, wherein said support plate (38), on its side toward the damping chamber (40), has at least one indentation (51), which with the magnet valve (24), in particular the electromagnet (29) of the magnet valve (24), forms a gap (49).6. The fuel injection device of claim 1, wherein said laminar throttle of the damping throttle is embodied in the form of a gap (49).7. The fuel injection device of claim 6, wherein the thickness of said gap (49) is from 0.1 to 0.2 mm.8. The fuel injection device of claim 1, wherein said support plate (38), on its side toward the damping chamber (40), has at least one indentation (51), which with the magnet valve (24), in particular the electromagnet (29) of the magnet valve (24), forms a gap (49).9. The fuel injection device of claim 8, wherein said indentation (51) is round and is disposed substantially concentrically with the through bore (45).10. The fuel injection device of claim 8, wherein said indentation (51) or indentations (51) are grooves extending substantially radially to the longitudinal axis of the through bore (45).11. The fuel injection device of claim 8, wherein said indentation (51) intersects at least one recess (53) in said support plate (38).12. The fuel injection device of claim 8, wherein the depth of the indentation (51) or indentations (51) is from 0.1 to 0.2 mm.13. The fuel injection device of claim 1, wherein said support plate (38) is mounted detachably in the fuel injection device.