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:
Apr. 27, 1976
Filed:
Mar. 04, 1975
John A Kimberley, East Granby, CT (US);
Richard D Kraus, Chicopee, MA (US);
Ambac Industries, Inc., Springfield, MA (US);
Abstract
A fuel injector for a diesel engine for use with a common rail type universal fuel injection system includes an injection piston driven by the common rail pressure fluid to inject a metered quantity of fuel through an injection nozzle. The opening of the nozzle valve is controlled by a compression spring in a conventional manner. The nozzle closing is effected by the introduction of fuel at injection pressure above the nozzle valve which acts in combination with the spring to seat the valve. In the preferred embodiment, means are provided for connecting the nozzle spring chamber with the pumping chamber of the injection piston at or slightly before the end of delivery of injected fuel to the nozzle, thereby producing a sharp cutoff of fuel flow through the nozzle. The valve spring may accordingly be selected to provide an optimum opening force rather than to satisfy the nozzle closing requirements as heretofore necessary.