US 12,287,652 B2
Fluid-conveying device with valves for controlling the fluid flow
Cornelius Köhler, Schwalbach a. T.s. (DE); Peter Bauer, Schwalbach a. T.s. (DE); Jan Hodgson, Schwalbach a. T.s. (DE); and Tobias Luebbert, Schwalbach a. T.s. (DE)
Assigned to Vitesco Technologies GmbH, Regensburg (DE)
Filed by Vitesco Technologies GmbH, Regensburg (DE)
Filed on Oct. 7, 2022, as Appl. No. 17/962,003.
Claims priority of application No. 10 2021 211 402.4 (DE), filed on Oct. 8, 2021.
Prior Publication US 2023/0111848 A1, Apr. 13, 2023
Int. Cl. G05D 7/01 (2006.01)
CPC G05D 7/01 (2013.01) 7 Claims
OG exemplary drawing
 
1. A fluid-conveying device configured to convey a fluid from a tank along a dosing line to an injection point by a pump, wherein the dosing line is attached at a pressure side of the pump by a connection plug attached to an outlet line, comprising:
at least one first valve preloaded by a spring and configured to:
prevent a fluid flow from the dosing line to the outlet line and
permit the fluid flow from the outlet line to the dosing line if a predefined minimum pressure p1 is reached on that side of the at least one first valve that faces toward the outlet line opening; and
a second valve configured to allow a fluid flow from the dosing line in a direction toward the outlet line only if a second pressure p2 acts on the second valve from the side of the dosing line,
wherein the predefined minimum pressure p1, at which the at least one first valve opens, is lower than the second pressure p2, at which the second valve opens.