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:
Oct. 03, 2017
Filed:
May. 15, 2013
Robert Bosch Gmbh, Stuttgart, DE;
Hans-Christoph Magel, Reutlingen, DE;
Andreas Gruenberger, Spraitbach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a fuel injection valve comprising a housing () in which pressure is applied to a nozzle needle (), in a control chamber (), at least indirectly with a closing force in the direction of a valve seat (). The pressure in the control chamber () can be adjusted using a control valve () as said control chamber () is able to be connected to a low pressure chamber () via an outlet restrictor () and be filled with fuel at high pressure via an inlet restrictor (). A longitudinally-displaceable control piston () is arranged in the control chamber () and divides said chamber () into a first control sub-chamber and a second control sub-chamber (), the first control sub-chamber () being able to be connected to the low pressure chamber () by means of said outlet restrictor (). A sealing surface () is formed on the control piston () and interacts with a sealing seat () in the control chamber () such that the inlet restrictor () is hydraulically disconnected from the second control sub-chamber () when the sealing surface () comes to rest against the sealing seat (). Said first control sub-chamber () and second control sub-chamber () are constantly hydraulically interconnected by means of a restrictor connection ().