Loading patent…
AssigneeRobert Bosch GmbH
InventorsOkke Venekamp, Chen Zhou
Estimating the term…
A stop valve (100) comprises a magnetic yoke (101), a solenoid coil (102), a compression spring (107) and an armature (105) on which an elastic membrane (106) is arranged. The membrane (106) can be sealingly pressed onto at least one fluid connection (108, 109). Furthermore, the compression spring (107) is positioned in such a way as to surround the edge of the lateral surface of the armature (105), and the solenoid coil (102) is positioned in such a way as to be enclosed by the compression spring (107). A method for detecting leaks and/or identifying variations in metered amounts is carried out in an SCR system comprising the stop valve (100) and involves opening the stop valve (100). A pressurized line is then filled with reducing agent and the stop valve (100) is closed. A pressure is subsequently reduced upstream of the stop valve (100) by shutting off a pump. Finally, any leak is detected and/or variations in the metered amount are identified by having the pressure sensor monitor the pressure downstream of the stop valve (100).
A stop valve (100) comprising a magnet yoke (101), a solenoid coil (102), a compression spring (107) and a solenoid armature (105) on which an elastic membrane (106) is arranged, wherein the membrane (106) is configured to be pressed with sealing effect onto at least one fluid connection (108, 109), and the compression spring (107) runs around an edge of a casing surface of the solenoid armature (105), and the solenoid coil (102) is enclosed by the compression spring (107).
(canceled)
Dependencies are inferred from the claim text.