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:
Aug. 19, 2003
Filed:
Jul. 13, 2000
Kevin P. Duffy, East Peoria, IL (US);
Brian G. McGee, Chillicothe, IL (US);
Caterpillar Inc, Peoria, IL (US);
Abstract
A fuel injection control system and method for delivering multiple fuel injections to a cylinder of an engine during a fuel injection event based upon engine operating conditions, the control system including an electronic controller coupled to an electronically controlled fuel injection device, and a plurality of sensors coupled to the controller for inputting certain signals representative of certain engine operating conditions of the engine, the controller being operable to output a fuel injection signal to the fuel injection device to deliver pilot, main, and anchor fuel shots to the cylinder during a fuel injection event based upon the sensor signals. The controller also divides the desired fuel quantity between the three shots. In dividing the total fuel set by the governor system between the three shots, the controller determines desired pilot and anchor fuel shot amounts and also determines minimum pilot, main, and anchor fuel shot amounts. By comparing the total fuel with various sums of the desired and minimum fuel amounts, actual fuel amounts for each shot are determined with the main shot given first priority, the pilot shot given second priority, and the anchor shot given third priority.