US 11,053,900 B2
Valve for metering a fluid
Andreas Schaad, Maulbronn (DE); Joerg Abel, Gerlingen (DE); Juergen Maier, Ottmarsheim (DE); Martin Buehner, Backnang (DE); Matthias Boee, Ludwigsburg (DE); Olaf Schoenrock, Stuttgart-Weilimdorf (DE); Philipp Rogler, Stuttgart (DE); and Stefan Cerny, Bietigheim-Bissingen (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 15/752,522
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Jul. 11, 2016, PCT No. PCT/EP2016/066384
§ 371(c)(1), (2) Date Feb. 13, 2018,
PCT Pub. No. WO2017/029031, PCT Pub. Date Feb. 23, 2017.
Claims priority of application No. 102015215537.4 (DE), filed on Aug. 14, 2015.
Prior Publication US 2019/0010906 A1, Jan. 10, 2019
Int. Cl. F02M 51/06 (2006.01); F02M 63/00 (2006.01); F02M 55/00 (2006.01); F16K 31/06 (2006.01)
CPC F02M 51/0685 (2013.01) [F02M 51/066 (2013.01); F02M 55/008 (2013.01); F02M 63/0022 (2013.01); F16K 31/0665 (2013.01); F16K 31/0693 (2013.01); F02M 2200/304 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A valve for metering a fluid, the valve comprising:
a valve-seat face;
an electromagnetic actuator including an armature, wherein the armature includes a plurality of through-flow channels, wherein each of through-flow channels opens with a corresponding one of a plurality of outlet openings at an end face of the armature;
a valve needle on which the armature is movably supported and that is operable using the armature;
a valve-closing member that is actuatable by the valve needle and that cooperates with the valve-seat face to form a sealing seat;
a stop element that is mounted fixedly on the valve needle and that interacts with at least one outlet opening of at least one through-flow channel such that throttling takes place with respect to the least one through-flow channel when the armature is located with its end face at the stop element; and
a further stop element, which has a further stop face, that is fixed with respect to the valve needle, wherein an internal-pole stop face is formed on an internal pole, wherein the internal-pole stop face of the internal pole and the further stop face of the further stop element face a further end face of the armature that faces away from the end face of the armature;
wherein a stop face, which is of the stop element, faces the end face of the armature, and wherein the stop face includes a tapered section which tapers away from a longitudinal axis of the valve needle, so that a space between the armature and the stop element forms a wedge shape that increases outwardly, wherein the space between the armature and the stop element that forms the wedge-shape aids hydraulic movement of the armature to the stop element during operation, and wherein the stop element also has an outer side that faces away from the end face of the armature and is tapered at least in another section to form a tapered area on the outer side,
wherein the stop element, which has the outer side that faces away from the end face of the armature, includes the tapered area in which a plurality of slots or bores are disposed,
wherein the plurality of slots or bores is greater in number than the plurality of through-flow channels or the plurality of outlet openings,
wherein the tapered section is covered by at least a portion of each of the through-flow channels, and
wherein the plurality of slots or bores are bores formed on the stop element, and which are arranged to permit a restricted flow with respect to the at least one through-flow channel when the armature is located with the end face of the armature at the stop element.