Pump active inlet valve spilling residual pressure
AssigneeCummins Inc.
InventorDonald J. Benson
Life of this patent
Estimating the term…
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.
Claims20
A method of controlling a pump having at least one 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.
A method of controlling a pump having at least one 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;
- and
- subsequent to determining the suspension of the one or more fuel delivery events, providing, by the controller, one or more commands to control an opening of an inlet valve of the pumping element to remove a portion of residual fluid within a pumping chamber of the pumping element, wherein the one or more commands indicates an instance in time to open the inlet valve and a duration to keep the inlet valve open.
A controller comprising:
- one or more processors;
- and
- memory storing instructions that when executed by the one or more processors, cause the one or more processors to:
- determine a suspension of one or more fuel delivery events for a pumping element;
- subsequent to determining the suspension of the one or more fuel delivery events, provide 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
- provide a second command to close the inlet valve of the pumping element based on a top dead center (TDC) position of the pumping element.
Dependencies are inferred from the claim text.