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:
Aug. 11, 2009
Filed:
Sep. 09, 2005
Wolfgang Ripper, Stuttgart, DE;
Johannes Schaller, Vaihingen An der Enz, DE;
Markus Buerglin, Ditzingen, DE;
Ulrich Meingast, Stuttgart, DE;
Dirk Heilig, Ditzingen, DE;
Wolfgang Ripper, Stuttgart, DE;
Johannes Schaller, Vaihingen An der Enz, DE;
Markus Buerglin, Ditzingen, DE;
Ulrich Meingast, Stuttgart, DE;
Dirk Heilig, Ditzingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a metering system for injecting pollutant reducing medium into an exhaust system includes a metering pump, and at least one self-opening nozzle for injecting fluidic media into the exhaust gas system. The nozzle is self-opening with a needle chamber, a nozzle needle and a spring chamber with a spring element. The needle chamber and spring chamber are separated by a flexible membrane which prevents fluidic media from escaping from the needle chamber into the spring chamber, and also permits an excess pressure to prevail in the needle chamber in relation to the spring chamber, causing the nozzle needle to be displaced in opposition to a spring force, thus releasing a nozzle opening. The inventive metering system is cost-effective, robust and can also be used at low operating temperatures.