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:
Apr. 04, 2006
Filed:
Mar. 25, 2003
Maike Sander-potz, Legal Representative, Stuttgart, DE;
Wendelin Potz, Legal Representative, Stuttgart, DE;
Thomas Kuegler, Korntal-Muenchingen, DE;
Andreas Koeninger, Neulingen-Goebrichen, DE;
Predrag Nunic, Stuttgart, DE;
Maike Sander-Potz, legal representative, Stuttgart, DE;
Wendelin Potz, legal representative, Stuttgart, DE;
Thomas Kuegler, Korntal-Muenchingen, DE;
Andreas Koeninger, Neulingen-Goebrichen, DE;
Predrag Nunic, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel injection valve for internal combustion engines, having a housing with a bore inside it that contains a longitudinally sliding outer valve needle which in turn contains a longitudinally sliding inner valve needle and the end of each valve needle oriented toward the combustion chamber controls at least one injection opening. The pressure in a control pressure chamber at least indirectly exerts a closing force on the outer valve needle and the pressure in a control pressure chamber at least indirectly exerts a closing force on the inner valve needle. The housing contains a control valve that has a valve chamber and a valve element contained in it, wherein the valve chamber has a connection to the leakage oil chamber a continuously open connection to the control chamber and a connection to the control pressure chamber. The valve element can move between a end position, the valve element closing the connection to the leakage oil chamber and opening the connection to the control pressure chamber and a second end position, closing the connection to the control pressure chamber and opening the connection to the leakage oil chamber.