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. 14, 2020
Filed:
Nov. 03, 2017
Caterpillar Inc., Peoria, IL (US);
James Steven Ulstad, Edwards, IL (US);
Ye Tian, Bloomington, IL (US);
Purvarag S. Shah, Dunlap, IL (US);
Kranti Kumar Nellutla, Normal, IL (US);
Sasidhar Rayasam, Peoria, IL (US);
Brian P. Brennan, Steger, IL (US);
Purna Chandra Sekhar Mokkarala, Chennai, IN;
Mohammed Rafi H, Chennai, IN;
Gregory Lance Armstrong, Edwards, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A fuel delivery system for an engine is provided. The fuel delivery system includes a fuel rail, a pressure sensor, a relief valve, and a controller. The controller is configured to receive a signal indicative of a fuel rail pressure, identify exceeding of the fuel rail pressure beyond a first threshold, identify the fuel rail pressure drop below a second threshold, and initiate a counter for a first predefined amount of time accordingly. The controller is also configured to identify if the fuel rail pressure drops below a third threshold within the first predefined amount of time, and identify if the fuel rail pressure remains below the third threshold for at least a second predefined amount of time. The controller is further configured to determine an open status of the relief valve based, at least in part, on the identification.