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:
Nov. 23, 2004
Filed:
Oct. 24, 2002
Rainer Haeberer, Bretten, DE;
Matthias Horn, Freiberg, DE;
Andreas Rettich, Herrenberg, DE;
Robert Hajnovic, Kornwestheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A solenoid valve for controlling an injection valve of an internal combustion engine is provided, including an electromagnet, a movable armature, a control valve member moved with the armature and cooperating with a valve seat for opening and closing a fuel discharge channel of a control pressure chamber of the injection valve, and a sliding piece guiding the armature, which is positioned together with the armature and the control valve member in an armature chamber. For reducing the bounce of the armature, the sliding piece subdivides the armature chamber into a pressure relief chamber connected to a fuel low-pressure connection and an hydraulic damping chamber, into which a fuel discharge channel opens. The damping chamber may be pressure-relieved to a pressure relief chamber via at least one connecting channel provided with a throttle, the speed of the control valve member being lowered during the closing of solenoid valve, before impact on valve seat, by a fuel pressure cushion acting upon the control valve member in the damping chamber.