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:
Jan. 01, 2002
Filed:
May. 26, 1999
James H. Cohen, Virginia Beach, VA (US);
Siemens Automotive Corporation, Auburn Hills, MI (US);
Abstract
An electromagnetically operable fuel injector for a gaseous fuel injection system of an internal combustion engine, said injector having a generally longitudinal axis, which comprises, a ferromagnetic core, a magnetic coil at least partially surrounding the ferromagnetic core, an armature magnetically coupled to the magnetic coil and being movably responsive to the magnetic coil, the armature actuating a valve closing element which interacts with a fixed valve seat of a fuel valve and being movable away from the fixed valve seat when the magnetic coil is excited. The fixed valve seat defining a fuel valve aperture. The armature has a generally elongated shape and a generally central opening for axial reception and passage of gaseous fuel from a fuel inlet connector positioned adjacent thereto, the fuel inlet connector and the armature being adapted to permit a first flow path of gaseous fuel between the armature and the magnetic coil as part of a path leading to the fuel valve. At least one fuel jet columnating device is positioned below the fuel valve for receiving fuel flow from the valve aperture in a stream having a first transverse dimension, and for permitting the stream to widen into a funnel shaped section having a transverse dimension greater than the first transverse dimension, and to thereafter columnate the stream to a transverse dimension greater than the transverse dimension of the valve aperture.