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. 29, 1980
Filed:
Jun. 19, 1978
Richard S Knape, Grand Rapids, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A fuel injector nozzle includes a housing having a compartment therein divided by a valve seat disc into a control chamber of predetermined volume on one side of the valve seat disc and a fuel chamber on the other side thereof, the valve seat disc having an aperture therethrough to effect communication between the control chamber and the fuel chamber, the housing having an inlet to the fuel chamber and an outlet from the fuel chamber for injection of fuel into an engine cylinder, a check valve in the form of a sleeve movably positioned in the fuel chamber for controlling flow from the control chamber through the aperture in the valve seat disc to the fuel chamber, and an inwardly opening, spring biased injection valve positioned in the fuel chamber with its enlarged diameter stem end guided in the check valve sleeve and having its other end positioned to control fuel injection out through the outlet. Fuel pressure built-up in the control chamber due to leakage of fuel from the fuel chamber past the mating sliding surfaces of the injection valve and check valve forces the check valve to an open position whereby to release pressure from the control chamber between injection strokes of the injection valve whereby a regulated pressure is maintained in the control chamber to act on the enlarged diameter end of the injection valve.