US 11,873,784 B2
Gas metering valve for internal combustion engines
Andreas Kremer, Waiblingen (DE); Andreas Koeninger, Neulingen-Goebrichen (DE); Daniel Bosse, Markgroeningen (DE); Fabian Fischer, Waiblingen (DE); Gerhard Suenderhauf, Tiefenbronn (DE); Lars Olems, Stuttgart (DE); Marco Beier, Rudolstadt (DE); Matthias Horn, Freiberg (DE); Oezguer Tuerker, Gerlingen (DE); and Sebastian Laechele, Backnang (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/794,372
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Jan. 27, 2021, PCT No. PCT/EP2021/051857
§ 371(c)(1), (2) Date Jul. 21, 2022,
PCT Pub. No. WO2021/151941, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 10 2020 201 168.0 (DE), filed on Jan. 31, 2020; and application No. 10 2020 201 973.8 (DE), filed on Feb. 18, 2020.
Prior Publication US 2023/0053845 A1, Feb. 23, 2023
Int. Cl. F02M 21/02 (2006.01)
CPC F02M 21/0242 (2013.01) [F02M 21/0263 (2013.01); F02M 21/0293 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A gas metering valve for an internal combustion engine, comprising:
a housing;
a gas chamber situated in the housing and including an inlet opening and an outlet opening;
a movable valve element situated in the gas chamber and movable by an electrical actuator against the force of a return spring, and which cooperates with a valve seat for opening and closing the inlet opening;
a blocking valve situated between the valve element and the outlet opening, which is able to interrupt a gas flow in the gas chamber between the valve element and the outlet opening; and
a coupler sleeve guided inside the housing in a longitudinally displaceable manner downstream from the valve element,
wherein an attenuation space is delimited to an inside by the coupler sleeve and is formed between the valve element and a shoulder in the housing,
wherein the attenuation space is connected to the gas chamber via a first annular gap between the valve element and the housing and a second annular gap between the coupler sleeve and the housing.