Method for Producing Throttle Holes having a Low Cavitation Transmission Point
AssigneeRobert Bosch GmbH
InventorsStefan Schantz, Klaus Seelbach
Life of this patent
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Abstract
A method for producing a throttle point, particularly in a channel of a valve piece of a fuel injector is disclosed. The following are performed: first, the outlet channel is created by machining Then, the throttle point is stamped by a stamping die inserted into a guide hole. The pre-stamped throttle point is electrical-discharge machined in such a way that said throttle point has an electrical-discharge machined inlet area and comprises a stamped outlet area, which lies before a continuous cross-section expansion of the outlet channel as viewed in the flow direction.
Claims12
A method for producing a throttle point, in particular in a duct for discharging a medium out of a chamber by means of which an injection valve member of a fuel injector is actuated, comprising:
- a) producing the duct in a valve piece,
- b) generating a contour in the duct by impressing the throttle point,
- c) generating a sharp-edged transition upstream of the throttle point, and
- d) producing a defined diameter by erosion at the throttle point, and maintaining an impressed outlet region.
Dependencies are inferred from the claim text.