Caterpillar Inc.

Purna Chandra Sekhar Mokkarala

Ye Tian

Kranti Kumar Nellutla

Gregory Lance Armstrong

Brian P Brennan

James Ulstad

Sasidhar Rayasam

Purvarag S Shah

Mohammed Rafi H

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.

Fuel delivery system

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Chennai, India

Purna Chandra Sekhar Mokkarala