Lever device and a fuel injection valve
View Patent ↗A lever device for a fuel injection valve includes a housing with a housing recess, at least one lever element arranged in the housing recess and having a coupling section coupled to a section of the housing, a drive element arranged in the housing recess and coupled to the at least one lever element to act upon the at least one lever element in the direction of a force-action axis, and an output element arranged in the housing recess and coupled to the at least one lever element such that the output element may be moved in the force-action axis direction by the at least one lever element. The coupling section of the lever element has at least one recess that defines at least two coupling section contact surfaces spaced apart from one another and resting against the housing section.
1. A lever device for a fuel injection valve, the lever device comprising:
a housing having a housing recess,
at least one lever element, each arranged in the housing recess and having a coupling portion coupled to a portion of the housing,
a drive element arranged in the housing recess and coupled to the at least one lever element to act on the at least one lever element along a longitudinal axis, and
an output element arranged in the housing recess and coupled to the at least one lever element such that the output element is moveable along the longitudinal axis by the at least one lever element,
wherein for each lever element, the coupling portion has a recess that defines at least two contact faces of the coupling portion that are spaced apart from each other and lie on the portion of the housing.
2. The lever device of claim 1 , wherein the at least two contact faces of the coupling portion comprise convex curved faces.
3. The lever device of claim 1 , wherein the portion of the housing comprises a disk shape.
4. The lever device of claim 1 , wherein the portion of the housing comprises at least one protrusion extending toward the at least one lever element in the longitudinal direction.
5. The lever device of claim 4 , wherein each protrusion is arranged between the at least two contact faces of the coupling portion of a respective lever element.
6. The lever device of claim 4 , wherein each protrusion contacts one of the contact faces of the coupling portion of a respective lever element.
7. The lever device of claim 1 , wherein the drive element comprises a bell-shaped element configured to act on the at least one lever element.
8. The lever device of claim 1 , wherein:
the at least one drive element comprises first and second drive elements arranged around a perimeter of the output element,
the output element defines first and second opposing flat wall segments, the first flat wall segment of the output element facing a corresponding flat wall section of the first drive element and the second flat wall segment of the output element facing a corresponding flat wall section of the second drive element.
9. A fuel injection valve, comprising:
a lever device comprising:
a housing having a housing recess,
at least one lever element, each arranged in the housing recess and having a coupling portion coupled to a portion of the housing,
a drive element arranged in the housing recess and coupled to the at least one lever element to act on the at least one lever element along a longitudinal axis, and
an output element arranged in the housing recess and coupled to the at least one lever element such that the output element is moveable along the longitudinal axis by the at least one lever element,
wherein for each lever element, the coupling portion has a recess that defines at least two contact faces of the coupling portion that are spaced apart from each other and lie on the portion of the housing, and
a valve needle coupled to or defining the output element,
wherein the drive element and the valve needle are coupled together via the lever device such that a closed position of the valve needle prevents a fluid flow through the fuel injection valve and other positions of the valve needle allow a fluid flow through the fuel injection valve.
10. The fuel injection valve of claim 9 , wherein the at least two contact faces of the coupling portion comprise convex curved faces.
11. The fuel injection valve of claim 9 , wherein the portion of the housing comprises a disk shape.
12. The fuel injection valve of claim 9 , wherein the portion of the housing comprises at least one protrusion extending toward the at least one lever element in the longitudinal direction.
13. The fuel injection valve of claim 12 , wherein each protrusion is arranged between the at least two contact faces of the coupling portion of a respective lever element.
14. The fuel injection valve of claim 12 , wherein each protrusion contacts one of the contact faces of the coupling portion of a respective lever element.
15. The fuel injection valve of claim 9 , wherein the drive element comprises a bell-shaped element configured to act on the at least one lever element.
16. The fuel injection valve of claim 9 , wherein:
the at least one drive element comprises first and second drive elements arranged around a perimeter of the output element,
the output element defines first and second opposing flat wall segments, the first flat wall segment of the output element facing a corresponding flat wall section of the first drive element and the second flat wall segment of the output element facing a corresponding flat wall section of the second drive element.