Injector having an improved solenoid actuator

Patent metadata

Field	Value
Publication number	US-11339756-B2
Application number	US-201716093234-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	May 13, 2016
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

An injector is described for injecting a fluid, in particular a fuel, comprising a solenoid actuator for operating a closing element, which releases and closes a through opening, the solenoid actuator including an armature which is connected to the closing element, an internal pole and an external magnetic circuit component, and the magnetic circuit component is a rolled magnetic sleeve made from a strip material.

First claim

What is claimed is:

1. An injector for an injection of a fluid, comprising:
a closing element that releases and closes a through opening; and
a solenoid actuator for operating the closing element, wherein:
the solenoid actuator includes an armature connected to the closing element, an internal pole, and an external magnetic circuit component, and
the magnetic circuit component is a magnetic sleeve rolled from a strip material, wherein:

the rolled magnetic sleeve has a single layer and includes a first abutting edge and a second abutting edge that rest against each other in a rolled state of the magnetic sleeve,
the solenoid actuator includes a bottom region disposed on an injector housing in a manner that projects as a ring and that is connected to the rolled magnetic sleeve at a second end of the magnetic sleeve disposed in the axial direction of the injector,
the solenoid actuator includes a cover connected to the rolled magnetic sleeve at a first end of the magnetic sleeve situated in an axial direction, and
the cover includes a slot that extends in the axial direction and is disposed at a recess of the rolled magnetic sleeve that is developed in a region of the first abutting edge and the second abutting edge, wherein a width in a circumferential direction of the slot corresponds to a width of the recess.

2. The injector as recited in claim 1 , wherein the fluid is a fuel.

3. The injector as recited in claim 1 , wherein:
the first abutting edge has at least one projecting region,
the second abutting edge has at least one recess, and
the projecting region is disposed in the recess via a keyed connection in the rolled state of the magnetic sleeve.

4. The injector as recited in claim 3 , wherein the projecting region has a constriction.

5. The injector as recited in claim 1 , wherein the first abutting edge is connected to the second abutting edge via a welded joint.

6. The injector as recited in claim 1 , wherein the recess is disposed at a first end in an axial direction of the injector.

7. The injector as recited in claim 6 , wherein:
the solenoid actuator includes electrical connection elements that are at least partially surrounded by a housing section, and
the housing section is at least partially disposed in the recess.

8. The injector as recited in claim 1 , wherein at least one of:
a first welded joint is provided between the bottom region and the magnetic sleeve, and
a second welded joint is provided between the cover and the magnetic sleeve.

Assignees

• Bosch Gmbh Robert

Inventors

• Ittlinger Ralph

Classifications

• F02M61/168 Primary

  Assembling; Disassembling; Manufacturing; Adjusting · CPC title

• F02M51/061 Primary

  using electromagnetic operating means · CPC title

• B05B1/3053

  the actuating means being a solenoid · CPC title

• F02M2200/8084

  involving welding or soldering · CPC title