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:
Mar. 10, 2009
Filed:
Feb. 14, 2004
Werner Kammerer, Vaihingen, DE;
Klaus Noller, Oppenweiler, DE;
Hubert Stier, Vaihinger/Enz, DE;
Dietmar Schmieder, Markgroeningen, DE;
Michael Huebel, Gerlingen, DE;
Thomas Gerschwitz, Eberdingen, DE;
Christian Leitner, Eltmann, DE;
Werner Kammerer, Vaihingen, DE;
Klaus Noller, Oppenweiler, DE;
Hubert Stier, Vaihinger/Enz, DE;
Dietmar Schmieder, Markgroeningen, DE;
Michael Huebel, Gerlingen, DE;
Thomas Gerschwitz, Eberdingen, DE;
Christian Leitner, Eltmann, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel injector has a piezoelectric or magnetostrictive actuator, which actuates a valve-closure member cooperating with a valve-seat surface a sealing seat. An hydraulic coupler includes a master piston, a slave piston, and a coupler volume formed in-between, the coupler volume being connected to a compensating chamber via a throttle. An elastic flexible section delimits the compensating chamber at least partially, and the coupler volume, the throttle, and the compensating chamber are filled with an hydraulic medium. The flexible section exerts a pressure on the hydraulic medium due to prestressing, and the force of a compression spring, which is braced either directly and/or via fixed components on the slave piston and the master piston, is directed with an initial stress in such a way that the force enlarges the coupler volume.