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. 24, 2009
Filed:
May. 31, 2006
Dennis H. Gibson, Chillicothe, IL (US);
Mark F. Sommars, Sparland, IL (US);
Jinhui Sun, Bloomington, IL (US);
Mohammad S. Dar, Peoria, IL (US);
Dennis H. Gibson, Chillicothe, IL (US);
Mark F. Sommars, Sparland, IL (US);
Jinhui Sun, Bloomington, IL (US);
Mohammad S. Dar, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A control system for a fuel injector is disclosed. The control system has a nozzle member with at least one orifice, and a needle check valve. The needle check valve is recipratingly disposed to open and close the at least one orifice. The control system also has a control chamber located at the base end of the needle check valve, and a control valve movable to selectively drain and fill the control chamber. The control system further has an injector body, a first piston located within the injector body, and a second piston located within the injector body. The first piston is operatively connected to the control valve to move the control valve. The second piston is located a distance from the first piston to form a coupling chamber. The control system additionally has a partial-ball check valve associated with the coupling chamber to selectively replenish the coupling chamber.