US 11,698,049 B2
Valve for metering a fluid
Anish Singh, Stuttgart West (DE); Joachim Stilling, Pfaffenhofen (DE); Martin Buehner, Backnang (DE); Nico Herrmann, Rastatt (DE); and Philipp Rauschenberger, Stuttgart (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 16/957,282
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Nov. 23, 2018, PCT No. PCT/EP2018/082311
§ 371(c)(1), (2) Date Jun. 23, 2020,
PCT Pub. No. WO2019/137680, PCT Pub. Date Jul. 18, 2019.
Claims priority of application No. 102018200364.5 (DE), filed on Jan. 11, 2018.
Prior Publication US 2021/0062771 A1, Mar. 4, 2021
Int. Cl. F02M 51/06 (2006.01); B05B 1/30 (2006.01); F02M 61/10 (2006.01); H01F 7/08 (2006.01); H01F 7/16 (2006.01)
CPC F02M 51/0685 (2013.01) [B05B 1/3053 (2013.01); F02M 61/10 (2013.01); H01F 7/081 (2013.01); H01F 7/1638 (2013.01); H01F 2007/086 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A valve for metering a fluid, comprising:
an electromagnetic actuator situated in a housing;
a valve needle which is actuatable by an armature of the actuator and used to actuate a valve closing body which cooperates with a valve seat surface to form a seal seat, the armature being movably guided at the valve needle;
at least one stop element connected to the valve needle and, in connection with an actuation of the valve needle, limits a relative movement between the armature and the valve needle; and
at least one elastically deformable spacer element situated between the armature and the at least one stop element, which, during a limitation of the relative movement between the armature and the valve needle at the at least one stop element, encloses an attenuation space situated between a front face of the armature and a stop element surface of the at least one stop element facing the front face of the armature, and, during the limitation of the relative movement between the armature and the valve needle at the at least one stop element, a volume of the attenuation space is reduced,
wherein the armature is situated in an armature space filled with a liquid fluid, and, during the limitation of the relative movement between the armature and the valve needle at the at least one stop element, at least some of the liquid fluid is displaced from the attenuation space,
wherein the at least some of the liquid fluid is displaced from the attenuation space: (i) via at least one gap between the front face of the armature and the spacer element and (ii) via a guide gap between the valve needle and the armature,
wherein an elevation is formed at the at least one stop element surface of the at least one stop element adjacent to the valve needle, and the at least one spacer element, at least during the limitation of the relative movement between the armature and the valve needle at the at least one stop element, is deformed in such a way that the elevation at least partially displaces a volume from a through-opening formed at the at least one stop element, and
wherein the elevation transversally opposes the spacer element and prevents contact between the armature and the stop element,
wherein the spacer element is conically shaped.