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:
Sep. 24, 1996
Filed:
Aug. 24, 1995
Norman C Blizard, Columbus, IN (US);
Paul D Free, Columbus, IN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
An electronic fuel injector includes a metering chamber defined by a metering piston and the sides and bottom of a bore defined within the injector body, and a timing chamber defined by the metering piston, the bore sides and a timing plunger slidably disposed within the bore. A biasing spring is connected to opposing surfaces of the timing plunger and metering piston for biasing the metering piston away from the timing plunger. The metering chamber is in constant fuel communication with a pressurized fuel source and the timing chamber receives fuel from the fuel source according to the actuation of a solenoid actuated control valve disposed therebetween. A fueling strategy for such an injector requires actuating the control valve to substantially fill the timing chamber before filling the metering chamber, for subsequent injection into the engine, when the force of the biasing spring is at a minimum.