Fuel injection valve
AssigneeRobert Bosch GmbH
InventorsThomas Sebastian, Juergen Graner, Wolfgang-Manfred Ruehle, Joachim Stilling, Matthias Boee, Norbert Keim
Life of this patent
Estimating the term…
Abstract
A fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, has a valve needle which cooperates with a valve-seat surface to form a sealing seat, and an armature which is connected to the valve needle, the armature being acted upon in the closing direction by a restoring spring and cooperating with a magnetic coil. The armature has a guide flange which is guided at an opposite surface. The guide flange does contact the opposite surface in all places, so that recesses are formed between the guide flange and the opposite surface.
Claims7
A fuel injector, comprising:
- a valve seat surface;
- a restoring spring;
- a magnetic coil;
- a valve needle that cooperates with the valve-seat surface to form a sealing seat;
- and
- an armature that is connected to the valve needle and is acted upon in a closing direction by the restoring spring, the armature cooperating with the magnetic coil and having a guide flange that is formed around a circumference of the armature and guided at an opposite surface, wherein:
- the guide flange is wave shaped and includes flattened regions that deviate from a circular outer contour of the armature, so that at least one recess is present between the guide flange and the opposite surface.
A fuel injector, comprising:
- a valve seat surface;
- a restoring spring;
- a magnetic coil;
- a valve needle that cooperates with the valve-seat surface to form a sealing seat;
- and
- an armature that is connected to the valve needle and is acted upon in a closing direction by the restoring spring, the armature cooperating with the magnetic coil and having a guide flange that is formed around a circumference of the armature and guided at an opposite surface, wherein:
- the guide flange includes flattened regions that deviate from a circular outer contour of the armature, so that at least one recess is present between the guide flange and the opposite surface, the armature includes a wave-shaped outer contour in a region of the guide flange.
Dependencies are inferred from the claim text.