The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 2020
Filed:
Apr. 12, 2017
Robert Bosch Gmbh, Stuttgart, DE;
Annabel Hackert, Leonberg, DE;
Manuel Simon Reiter, Stuttgart, DE;
Marc Ringeisen, Ceske Budejovice, CZ;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for emptying a reducing agent delivery system belonging to an SCR catalytic converter, which comprises a delivery line and a return line, each line connecting a reducing agent tank to a delivery module, and which comprises a pressure line that connects the delivery module to a metering valve. The method comprises the following steps: closing () the metering valve, and switching the delivery module from a delivering function to a returning function, by switching () a switching valve from a first position to a second position. This enables a reducing agent solution to be returned () from the return line, the delivery line and the delivery module by means of the delivery module and the delivery line into the reducing agent tank. Subsequently, the metering valve is opened () and a reducing agent solution is returned () from the metering valve and the pressure line, and also from the return line, via the delivery line into the reducing agent tank. Additionally, the metering valve is closed again () in order to empty () the return line and the delivery module.