Electromagnet of an electromagnetically actuated fluid valve

Patent metadata

Field	Value
Publication number	US-2016305571-A1
Application number	US-201415103251-A
Country	US
Kind code	A1
Filing date	Dec 2, 2014
Priority date	Dec 10, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

The invention relates to an electromagnet 1 of an electromagnetically actuated fluid valve 2. The electromagnet 1 has a magnet core 17 which receives a coil 18 and an armature unit 19 which can be moved axially to the coil 18 in the magnet core 17. The electromagnet further has a device for damping a stop of the armature unit 19 against the magnet core 17. According to the invention, an electromagnet 1 is provided which is permanently improved with respect to the noise emanating from said electromagnet. This is achieved in that the device has a flow cross-section 28 for a medium, said flow cross-section decreasing when the armature unit 19 is moved. The cross-section is formed by a cone 26 which interacts with a counter surface 27.

First claim

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 ).

2 . The electromagnet ( 1 ) as claimed in claim 1 , characterized in that the device is a cone ( 26 ) which interacts with a corresponding surface ( 27 ).

3 . The electromagnet ( 1 ) as claimed in claim 2 , characterized in that the cone ( 26 ) is formed in the armature unit ( 19 ).

4 . The electromagnet ( 1 ) as claimed in claim 2 , characterized in that the cone ( 26 ) is formed in the magnet core ( 17 ).

5 . The electromagnet ( 1 ) as claimed in claim 2 , characterized in that the corresponding surface ( 27 ) is arranged in the magnet core ( 17 ) or the armature unit ( 19 ).

6 . The electromagnet ( 1 ) as claimed in claim 2 , characterized in that the cone ( 26 ) surrounds a pot-shaped recess ( 29 ).

7 . The electromagnet ( 1 ) as claimed in claim 6 , characterized in that the magnet core ( 17 ) or the armature unit ( 19 ) has a cylinder projection ( 30 ) which can be introduced into the pot-shaped recess ( 29 ).

8 . 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 ) and/or of the pot-shaped recess ( 29 ).

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

10 . 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.

11 . The electromagnet ( 1 ) as claimed in claim 3 , characterized in that the corresponding surface ( 27 ) is arranged on the magnet core ( 17 ).

12 . The electromagnet ( 1 ) as claimed in claim 11 , characterized in that the cone ( 26 ) surrounds a pot-shaped recess ( 29 ) in the armature.

13 . The electromagnet ( 1 ) as claimed in claim 12 , characterized in that the magnet core ( 17 ) has a cylinder projection ( 30 ) which can be introduced into the pot-shaped recess ( 29 ).

14 . The electromagnet ( 1 ) as claimed in claim 13 , 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 at least one of the cone ( 26 ) and the pot-shaped recess ( 29 ).

15 . The electromagnet ( 1 ) as claimed in claim 13 , 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 both the cone ( 26 ) and the pot-shaped recess ( 29 ).

Assignees

• Bosch Gmbh Robert

Inventors

• Meisiek Achim
• Kolb Stefan

Classifications

• H01F7/088

  provided with means for absorbing shocks · CPC title

• H01F7/16

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

• F16K31/0693 Primary

  Pressure equilibration of the armature · CPC title

• F16K31/0644

  One-way valve · CPC title

• F16K31/0686 Primary

  Braking, pressure equilibration, shock absorbing · CPC title