Fuel-injection metering device, fuel-injection nozzle, mould for producing a fuel-injection metering device and method for producing a fuel-injection metering device

• US 10,989,157 B2
• Filed: 03/28/2019
• Issued: 04/27/2021
• Est. Priority Date: 02/03/2014
• Status: Active Grant

• Current Assignee: Stoba Holding GmbH & Co., KG (Berndorf AG)
• Original Assignee: Stoba Holding GmbH & Co., KG (Berndorf AG)
• Inventors: Gunther, Oliver, Gunther, Markus, Hog, Thomas, Konietzni, Hans-Joachim, Leichtle, Matthias, Pfendtner, Klaus, Wagner, Ulrich
• Primary Examiner(s): McCall, Eric S.
• Application Number:
  US16/367,909
• Publication Number:
  US 20190234364A1
• Time in Patent Office: 761 Days
• Field of Search: 7311445
• CPC Class Codes: B23H 3/00 Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
• CPC Class Codes: B23H 3/04 Electrodes specially adapted therefor or their manufacture B23H9/00 takes precedence
• CPC Class Codes: B23H 9/00 Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects heat treatment by cathodic discharge C21D1/38
• CPC Class Codes: B23H 9/14 Making holes
• CPC Class Codes: F02M 2200/80 Fuel injection apparatus manufacture, repair or assembly
• CPC Class Codes: F02M 2200/8046 the manufacture involving injection moulding, e.g. of plastic or metal
• CPC Class Codes: F02M 2200/8069 involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
• CPC Class Codes: F02M 61/12 characterised by the provision of guiding or centring means for valve bodies
• CPC Class Codes: F02M 61/168 Assembling; Disassembling; Manufacturing; Adjusting
• CPC Class Codes: F02M 61/188 Spherical or partly spherical shaped valve member ends
• CPC Class Codes: F02M 61/1886 Details of valve seats not covered by groups F02M61/1866 - F02M61/188
• CPC Class Codes: F02M 69/002 characterised by means for intermittently metering the portion of fuel injected F02M69/12, F02M69/14 take precedence

Abstract

The present application concerns a fuel-injection metering device for a motor vehicle. The fuel-injection device include a main body with at least one through-hole, whereby the main body forms a valve seat on its inner face that is provided to interact with a valve body, whereby the inner face of the main body is electrochemically machined. The application also concerns a mould, a production method, and a fuel-injection nozzle.

Claims

1. Mould for producing a fuel-injection metering device, with an electrically chargeable cathode, whereby the cathode exhibits at one end an electrically insulating layer through which an engagement section of the cathode protrudes, characterized in that,

the engagement section is surrounded by segment-like insulation sections running in an axial direction, between which active areas of the cathode are uncovered.

2. Mould according to claim 1, characterized in that there is at least one electrolyte fluid guidance groove on the surface of the insulation layer, and/or

at least one electrolyte fluid guidance channel runs through the material of the insulation layer.