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. 29, 1983
Filed:
Apr. 29, 1982
Paul Fussner, Sindelfingen, DE;
Karl Hofmann, Remseck, DE;
Iwan Komaroff, Regensburg, DE;
Kurt Seifert, Esslingen-Zollberg, DE;
Dietrich Trachte, Kornwestheim, DE;
Wilhelm Vogel, Stuttgart, DE;
Hans-Jorg Vogtmann, Markgroningen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
To provide for coupling the injection needle of a Diesel injection valve with an inertia mass, and thereby provide for speed damping of the movement of the valve, the pressurized Diesel fuel is applied to a chamber (20,68) in the valve body (10,12,14), which slidably retains the needle valve element (18) at a location downstream of the inertia mass, the inertia mass subdividing the chamber into a spring or pressure chamber (20) and a damping chamber (68) forming a dead, or storage chamber for fuel, the inertia mass being slidable in the second chamber and the clearance between the inertia mass and the walls of the chamber forming a throttled connection duct so that, upon command to opening movement, the needle valve element will engage, after a short dead distance (v), the inertia mass (62) which must move against the flow resistance through the throttled connection upon shifting of fuel between the first and second chamber and thus damping the speed of operation of the valve element. The pressure differential at the two sides of the inertia mass will act on the entire cross-sectional area of the inertia mass, to provide high initial damping of the valve needle movement upon initiation of an opening stroke, while permitting a slim construction minimizing external diameter.