Fuel-injection metering device, fuel-injection nozzle, mould for producing a fuel-injection metering device and method for producing a fuel-injection metering device
AssigneeStoba Holding GmbH & Co., KG
InventorsOliver Günther, Markus Günther, Thomas Hög, Hans-Joachim Konietzni, Matthias Leichtle, Klaus Pfendtner, Ulrich Wagner
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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 mold, a production method, and a fuel-injection nozzle.
Claims7
A fuel-injection metering device for a motor vehicle which comprises a valve sleeve and a main body with at least one through-hole,
- whereby the main body forms a valve seat on its inner face which is provided to interact with a valve body in order to seal and open the through-hole, and
- whereby several longitudinal grooves extending in an axial direction are provided on the inner face of the main body wherein the longitudinal grooves are separated by ridges, and
- wherein the inner face of the main body is electrochemically machined,
- characterized in that
- the ridges are rounded in the transition area to the longitudinal grooves and the transition area is electrochemically machined,
- wherein the longitudinal grooves run between a hollow-cylindrical wall section and a transition area close to a base in a chamfered area,
- wherein the relevant bevel angle for the chamfered area at which the longitudinal grooves are positioned is between 5° to 10°.
Dependencies are inferred from the claim text.