• Patent Title: Pump active inlet valve spilling residual pressure
  • Application No.: US17605174
    Application Date: 2019-04-22
  • Publication No.: US11668261B2
    Publication Date: 2023-06-06
  • Inventor: Donald J. Benson
  • Applicant: Cummins Inc.
  • Applicant Address: US IN Columbus
  • Assignee: Cummins Inc.
  • Current Assignee: Cummins Inc.
  • Current Assignee Address: US IN Columbus
  • Agency: Taft, Stettinius & Hollister LLP
  • International Application: PCT/US2019/028480 2019.04.22
  • International Announcement: WO2020/219007A 2020.10.29
  • Date entered country: 2021-10-20
  • Main IPC: F02D41/38
  • IPC: F02D41/38
Pump active inlet valve spilling residual pressure
Abstract:
A method and system is provided of controlling a pump having a pumping element comprising: determining, by a controller, a suspension of one or more fuel delivery events for a pumping element of the at least one pumping element; subsequent to determining the suspension of the one or more fuel delivery events, providing, by the controller, a first command to open an inlet valve of the pumping element to remove a portion of residual fluid within a pumping chamber based on pressure within the pumping chamber of the pumping element; and subsequent to providing the first command, providing, by the controller, a second command to close the inlet valve of the pumping element based on a top dead center (TDC) position of the pumping element.
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