Injection valve

Patent metadata

Field	Value
Publication number	US-9506437-B2
Application number	US-201314443239-A
Country	US
Kind code	B2
Filing date	Oct 1, 2013
Priority date	Nov 28, 2012
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A fuel injection valve includes: a magnetic coil; an armature; and a valve needle connected to the armature for actuating a valve closing body which forms, together with a valve seat surface, a seal seat. Formed downstream from the valve seat surface is a spray opening that has, at the transition from a first to a second spray opening segment, a tear-off edge such that the complete opening angle of the spray opening at the tear-off edge is greater than 270° over the entire circumferential tear-off edge, so that, going out from the tear-off edge, on the floor of the second spray opening segment of the spray opening, there extends a circumferential floor region that is recessed behind the transition plane in which the tear-off edge is situated.

First claim

What is claimed is:

1. An injection valve for a fuel injection system of an internal combustion engine, comprising:
an actuator;
a movable valve component;
a valve closing body which forms, together with a valve seat surface, a seal seat; and
at least one spray opening formed downstream from the valve seat surface, the at least one spray opening having at least one upstream first spray opening segment having a first opening width, and having a downstream second spray opening segment having a second opening width greater than the first opening width, wherein at a transition from the first to the second spray opening segment, a tear-off edge is formed in such a way that a complete opening angle of the at least one spray opening at the tear-off edge is greater than 270° over an entire circumferential tear-off edge so that, going out from the tear-off edge on a floor of the second spray opening segment of the at least one spray opening, a recessed circumferential floor region extends behind a transition plan in which the tear-off edge is situated;
wherein going out from the tear-off edge, the floor region which extends radially outward in recessed fashion extends with an oblique inclination up to a deepest point that does not run flush with an outer wall region of the second spray opening segment of the at least one spray opening.

2. The injection valve as recited in claim 1 , wherein going out from the deepest point, a further planar and obliquely inclined floor region extends in the other direction of inclination, up to the outer wall region of the second spray opening segment of the at least one spray opening.

3. The injection valve as recited in claim 1 , wherein a contour of the at least one spray opening is produced by laser drilling.

4. The injection valve as recited in claim 1 , wherein the valve component that has the at least one spray opening is the valve seat body.

5. The injection valve as recited in claim 4 , wherein between two and twenty spray openings are provided in the corresponding valve component.

Assignees

• Bosch Gmbh Robert

Inventors

• Pilgram Guido

Classifications

• B05B1/02

  designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, {or having an outlet of particular shape}(B05B1/26, B05B1/28, B05B1/34 take precedence) · CPC title

• F02M61/1853

  Orifice plates · CPC title

• B05B1/28

  with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material · CPC title

• F02M61/04 Primary

  having valves {, e.g. having a plurality of valves in series} · CPC title

• F02M61/1806

  characterised by the arrangement of discharge orifices, e.g. orientation or size · CPC title