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:
Mar. 09, 1999
Filed:
Feb. 26, 1997
Michael D Anderson, Metamora, IL (US);
Shikui K Chen, Peoria, IL (US);
Mark F Sommars, Sparland, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulically actuated fuel injector includes an injector body having a nozzle chamber that opens to a nozzle outlet. A control valve is mounted in the injector body and is attached to a solenoid that is moveable between a rest position and a fully energized position. A piston/plunger/barrel assembly is utilized to hydraulically pressurize fuel in the nozzle chamber to a fuel pressure that is substantially proportional to an amount of current being supplied to the solenoid. A needle valve member is positioned in the nozzle chamber and moveable between an open position in which the nozzle outlet is opened and a closed position in which the nozzle outlet is blocked. Finally, a spring is utilized to bias the solenoid toward its rest position.