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.
Claims10
1-10. (canceled)
An injection valve, comprising:
- a valve seat having a valve-seat surface;
- and
- a valve needle which extends along a closing direction, a valve-closing element being 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, the valve-closing element forming a sealing seat together with the valve-seat surface in the closed position;
- wherein the valve-closing element has at least one of:
- i) a greater core hardness than the valve-seat surface, or ii) a greater surface hardness than the valve-seat surface;
- and
- wherein the valve-closing element includes a base body material and at least one diffusion layer with nitrogen and boron diffused into the base body material.
Dependencies are inferred from the claim text.