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:
Dec. 05, 2006
Filed:
Oct. 31, 2003
Thomas Kuegler, Korntal-Muenchingen, DE;
Thomas Kuegler, Korntal-Muenchingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel injection valve for internal combustion engines includes a valve body () in which a bore () is defined in one end, in which a first row of injection openings () and a second row of injection openings () are formed. In the bore (), an outer valve needle () cooperates with the valve seat () for controlling the first row of injection openings (); between the outer valve needle () and the wall of the bore (), a pressure chamber () is formed. In the outer valve needle (), an inner bore () is formed, in which an inner valve needle () is located and which cooperates with the valve seat () for controlling the second row of injection openings (). A pressure shoulder () is formed on the inner valve needle. A hydraulic opening force is exerted on the inner valve needle (); by its opening stroke, the outer valve needle () opens a throttle connection () from the pressure chamber () to the pressure shoulder () of the inner valve needle ().