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:
Jul. 03, 2012
Filed:
Sep. 17, 2010
Nadeem Bunni, Cranberry Township, PA (US);
Daniel R. Puckett, Peoria, IL (US);
Jay Venkataraghavan, Dunlap, IL (US);
Stephen R. Lewis, Chillicothe, IL (US);
Angela L. Moore, Peoria, IL (US);
Nadeem Bunni, Cranberry Township, PA (US);
Daniel R. Puckett, Peoria, IL (US);
Jay Venkataraghavan, Dunlap, IL (US);
Stephen R. Lewis, Chillicothe, IL (US);
Angela L. Moore, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An efficient control wave form is utilized to actuate the solenoids of a fuel system to reduce boost power/energy consumption. The solenoid is initially energized by applying a boost voltage from an electronic controller across a solenoid coil circuit. The electronic controller monitors the current level in the solenoid coil circuit, and changes to a reduced battery voltage when the current level in the solenoid coil circuit reaches a predetermined trigger current. The controller then maintains a pull-in current based upon battery voltage for a pull-in duration that initiates movement of the solenoid armature from an initial air gap position toward a final air gap position. After the pull-in duration, the current level is dropped to a hold in level for the remaining duration of the actuation event. The solenoid may be used for fuel injector control and/or pump control, such as to control fuel injection and pumping events respectively.