公开(公告)号：US10711726B2

公开(公告)日：2020-07-14

申请号：US15803049

申请日：2017-11-03

Applicant: Caterpillar Inc.

Inventor： James Steven Ulstad ,  Ye Tian ,  Purvarag S. Shah ,  Kranti Kumar Nellutla ,  Sasidhar Rayasam ,  Brian P. Brennan ,  Purna Chandra Sekhar Mokkarala ,  Mohammed Rafi H ,  Gregory Lance Armstrong

IPC: F02D41/38 ,  F02D19/02

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.

公开(公告)号：US20190136787A1

公开(公告)日：2019-05-09

申请号：US15803049

申请日：2017-11-03

Applicant: Caterpillar Inc

Inventor： James Steven Ulstad ,  Ye Tian ,  Purvarag S. Shah ,  Kranti Kumar Nellutla ,  Sasidhar Rayasam ,  Brian P. Brennan ,  Purna Chandra Sekhar Mokkarala ,  Mohammed Rafi H ,  Gregory Lance Armstrong

IPC: F02D41/38

CPC classification number: F02D41/3863 ,  F02D19/022 ,  F02D41/3845 ,  F02D2200/0602

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.