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US 10,415,523 B2Granted
Fuel injection valve
AssigneeRobert Bosch GmbH
InventorsDieter Blatterer, Gerhard Girlinger, Roland Mitter
Life of this patent
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AssigneeRobert Bosch GmbH
InventorsDieter Blatterer, Gerhard Girlinger, Roland Mitter
Estimating the term…
Fuel injection valve having a magnet armature (18) which interacts with a valve seat (19), which is formed on a valve piece (15), in order to open and close an outflow opening (20), wherein the magnet armature (18) can be moved away from the valve seat (19) by an electromagnet (24). A valve piece (15) delimits a control chamber (12), wherein the outflow opening (20) opens into the control chamber (12), and the control chamber (12) can be charged with fuel at high pressure that exerts a hydraulic force on the valve piece (15). Between the magnet armature (18) and the valve piece (15), there is arranged a bracing element (30) which is preloaded against the valve piece (15) and which exerts a force on the valve piece (15) in the region of the outflow opening (20) in the direction of the control chamber (12).
A fuel injection valve having a magnet armature (18) which is arranged in an outflow chamber (16) formed in a valve body (2) and interacts with a valve seat (19), which is formed on a valve piece (15), in order to open and close an outflow opening (20), wherein the magnet armature (18) is movable away from the valve seat (19) by an electromagnet (24), and having a control chamber (12) which is delimited by the valve piece (15), wherein the outflow opening (20) opens into the control chamber (12), and the control chamber (12) is configured to be charged with fuel at high pressure, wherein pressure in the control chamber (12) exerts a hydraulic force on the valve piece (15) in a direction of the magnet armature (18), wherein a bracing element (30) is arranged between the magnet armature (18) and the valve piece (15), wherein one of the valve piece (15) or the bracing element (30) includes a protrusion positioned about the outflow opening (20) and radially inward of an outer edge of the valve piece (15) such that the protrusion does not contact the outer edge, and wherein the bracing element (30) is preloaded against the valve piece (15) at the protrusion and exerts a force on the valve piece (15) at the protrusion in a direction of the control chamber (12), and wherein the bracing element (30) is preloaded against the valve piece (15) by a sleeve (28) that contacts a bottom side of the electromagnet (24) and a top side of the bracing element (30).
A fuel injection valve having a magnet armature (18) which interacts with a valve seat (19), which is formed on a valve piece (15), in order to open and close an outflow opening (20), wherein the magnet armature (18) is movable in an axial direction away from the valve seat (19) by an electromagnet (24), and having a control chamber (12) which is delimited by the valve piece (15), wherein the outflow opening (20) opens into the control chamber (12), and the control chamber (12) is configured to be charged with fuel at high pressure, wherein pressure in the control chamber (12) exerts a hydraulic force on the valve piece (15) in a region of the outflow opening (20) in a direction of the magnet armature (18), wherein a bracing element (30) is arranged between the magnet armature (18) and the valve piece (15), wherein one of the valve piece (15) or the bracing element (30) includes a protrusion positioned about the outflow opening (20) and located nearer to the outflow opening (20) than to an outer edge of the valve piece (15) in a radial direction perpendicular to the axial direction, and wherein the bracing element (30) is preloaded against the valve piece (15) and exerts a force on the valve piece (15) in the region of the outflow opening (20) at the protrusion in a direction of the control chamber (12).
A fuel injection valve having a magnet armature (18) which interacts with a valve seat (19), which is formed on a valve piece (15), in order to open and close an outflow opening (20), wherein the magnet armature (18) is movable away from the valve seat (19) by an electromagnet (24), and having a control chamber (12) which is delimited by the valve piece (15), wherein the outflow opening (20) opens into the control chamber (12), and the control chamber (12) is configured to be charged with fuel at high pressure, wherein pressure in the control chamber (12) exerts a hydraulic force on the valve piece (15) in a region of the outflow opening (20) in a direction of the magnet armature (18), wherein a bracing element (30) is arranged between the magnet armature (18) and the valve piece (15), wherein one of the valve piece (15) or the bracing element (30) includes a protrusion positioned about the outflow opening (20), wherein the bracing element (30) is preloaded against the valve piece (15) and exerts a force on the valve piece (15) in the region of the outflow opening (20) at the protrusion in a direction of the control chamber (12), wherein the electromagnet (24) is preloaded in a direction of the valve piece (15) by a magnet spring (27), and wherein the bracing element (30) is non-threaded and thereby configured to linearly translate against the magnet spring (27) to move the electromagnet (24) in response to deformation of the valve piece (15).
Dependencies are inferred from the claim text.