Electromagnetically operated valve
AssigneeRobert Bosch GmbH
InventorsClemens Willke, Jurgen Graner, Dieter Maier
Life of this patent
Estimating the term…
Abstract
An electromagnetically actuated valve, includes an axially movable valve needle that includes at least one armature and one spherical valve-closure member. The armature forms a closing-member support, which receives the valve-closure member in a downstream end area. In this context, the end area encompasses the valve-closure member such that at least one channel, in direct connection with a longitudinal bore of the armature, is formed on the surface of the valve-closure member. The valve is well suited for use in fuel injection systems of mixture-compressing internal combustion engines having externally supplied ignition.
Claims12
An electromagnetically actuated valve having a longitudinal valve axis, comprising:
- a core;
- a solenoid coil at least partially surrounding the core;
- a stationary valve seat;
- and
- an axially movable valve needle including a closing-member support and a spherical valve-closure member, the spherical valve-closure member being fixedly joined to the closing-member support and cooperating with the stationary valve seat, the closing-member support having an inner longitudinal bore extending to a surface of the spherical valve-closure member, and a downstream end area having an external diameter which is greater than a diameter of the spherical valve-closure member, the closing-member support surrounding the spherical valve-closure member with the downstream end area to form at least one channel extending along a surface of the spherical valve-closure member, the at least one channel including an axially elongated portion and being connected to the inner longitudinal bore, the at least one channel extending to an end portion of the downstream end area and at least to a sphere equator of the spherical valve-closure member in a downstream direction.
Dependencies are inferred from the claim text.