Valve and method for producing a valve
AssigneeRobert Bosch GmbH
InventorFatima Mutlu
Life of this patent
Estimating the term…
Abstract
A valve is provided, in particular an injection valve, having a valve seat and a valve needle which extends along a closing direction for the most part, the valve seat having a valve-seat surface, and a valve-closing element is mounted on an end of the valve needle facing the valve seat, the valve-closing element being able to be moved between an open position and a closed position, and the valve-closing element together with the valve-seat surface forming a sealing seat in the closed position, the valve-closing element having a greater core hardness and/or surface hardness than the valve-seat surface.
Claims14
A method for producing a valve, comprising:
- in a first production step, developing a valve-closing element from a base body material;
- in a second production step, conducting a nitrifying diffusion on the valve-closing element, the nitrifying diffusion including diffusing nitrogen into the base body material of the valve-closing element by providing a nitrogen-containing substance in at least one of:
- a gaseous state, a liquid state, or a plasma state;
- and
- in a third production step, conducting a boronizing diffusion on the valve-closing element, the boronizing diffusion including diffusing boron into the base body material of the valve-closing element by providing a boron-containing substance in at least one of:
- a gaseous state, a liquid state, or a plasma state.
Dependencies are inferred from the claim text.