Electromagnet of an electromagnetically actuated fluid valve

Patent metadata

Field	Value
Publication number	US-10006561-B2
Application number	US-201415103251-A
Country	US
Kind code	B2
Filing date	Dec 2, 2014
Priority date	Dec 10, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

An electromagnet of an electromagnetically actuated fluid valve includes a magnet core that receives a coil, and an armature unit that can be moved axially relative to the coil in the magnet core. The electromagnet further has a device for damping a stop of the armature unit against the magnet core. The device has a flow cross-section for a medium, the flow cross-section decreasing when the armature unit is moved. The cross-section can be formed by a cone that interacts with a counter surface.

First claim

The invention claimed is:

1. An electromagnet ( 1 ) of an electromagnetically actuated fluid valve ( 2 ), the electromagnet ( 1 ) comprising: a magnet core ( 17 ) which receives a coil ( 18 ); an armature unit ( 19 ) which can be moved axially with respect to the coil ( 18 ) in the magnet core ( 17 ); and a device for damping a stop movement of the armature unit ( 19 ) on the magnet core ( 17 ), characterized in that the device has a throughflow cross section ( 28 ) for a medium, which throughflow cross section is reduced in the case of a movement of the armature unit ( 19 ) and wherein the throughflow cross section is defined by a cone ( 26 ) formed in the armature unit ( 19 ) and a corresponding surface ( 27 ) on the magnet core ( 17 ), and wherein
the armature unit ( 19 ) includes a pot-shaped recess ( 29 ) formed therein and axially offset from the cone ( 26 ) such that no portion of the cone ( 26 ) extends into the pot-shaped recess ( 29 ), and the magnet core ( 17 ) has a cylinder projection ( 30 ) having a diameter corresponding to a diameter of the pot-shaped recess ( 29 ), and wherein when the cylinder projection 30 is introduced into the pot-shaped recess ( 29 ) upon energization of the coil ( 18 ), flow through the throughflow cross section is prevented.

2. The electromagnet ( 1 ) as claimed in claim 1 , characterized in that an end stop of the armature unit ( 19 ) in the magnet core ( 17 ) is formed by a residual air gap disk ( 23 ) which is arranged in a region of the cone ( 26 ), or of the pot-shaped recess ( 29 ), or both.

3. The electromagnet ( 1 ) as claimed in claim 1 , characterized in that the medium is a gaseous medium or a liquid.

4. The electromagnet ( 1 ) as claimed in claim 1 , characterized in that the electromagnet ( 1 ) and the fluid valve ( 2 ) are part of an electromagnetically actuated upstroke valve for a high pressure fuel pump.

Assignees

• Bosch Gmbh Robert

Inventors

• Meisiek Achim
• Kolb Stefan

Classifications

• F16K31/0644

  One-way valve · CPC title

• F16K31/0693 Primary

  Pressure equilibration of the armature · CPC title

• F16K31/0686 Primary

  Braking, pressure equilibration, shock absorbing · CPC title

• H01F7/16

  Rectilinearly-movable armatures (H01F7/17 takes precedence) · CPC title

• H01F7/088

  provided with means for absorbing shocks · CPC title