Fuel injector with clamping sleeve as a stop for a valve needle
AssigneeRobert Bosch GmbH
InventorPeter Grabandt
Life of this patent
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Abstract
A method for producing a fuel injector and a fuel injector for internal combustion engines, having a control valve with an electromagnetically actuatable valve needle; a coil is received in a magnet cup made of magnetizable material. At least one clamping sleeve, with a slot extending between the face ends of the clamping sleeve, is received in the magnet cup.
Claims18
In a fuel injector for internal combustion engines, having a control valve (1) with an electromagnetically actuatable valve needle (3), in which a coil (19) is received in a magnet cup (18) made of magnetizable material, the valve needle (3) having a head (11) with an end face stop (14) at the end of the valve needle (3) facing the magnetic cup (18), at least one tubular clamping sleeve (23) received in the magnet cup (18), the tubular clamping sleeve (23) having a slot (24) extending between its face ends, wherein the diameter (28) of the end face stop (14) of the valve needle head (11) is less than the outer diameter (29) of the tubular clamping sleeve (23) and greater than the inner diameter of the tubular clamping sleeve (23) so that upon opening of the valve the valve needle (3) will strike against only the tubular clamping sleeve (23), and not against the magnet cup (18).
In a fuel injector for internal combustion engines, having a control valve (1) with an electromagnetically actuatable valve needle (3), in which a coil (19) is received in a magnet cup (18) made of magnetizable material, the improvement comprising at least one clamping sleeve (23) received in the magnet cup (18), the clamping sleeve (23) having a slot (24) extending between its face ends, wherein at least two clamping sleeves (23, 38), whose slots (24, 39) are located at different radial positions, are received in the magnet cup (18).
Dependencies are inferred from the claim text.