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:
Feb. 02, 2021
Filed:
Mar. 07, 2019
Eaton Intelligent Power Limited, Dublin, IE;
Martin A. Clements, West Chester, OH (US);
Eaton Intelligent Power Limited, Dublin, IE;
Abstract
An engine fuel or pump system includes a centrifugal pump having an impeller for imparting energy to an associated fluid for an associated downstream engine fuel system. A regenerative start stage is in selective fluid communication with the pump. And ejector includes an inlet that communicates with the pump outlet and an outlet that communicates with the pump inlet. Further, a regulator valve is interposed between the pump outlet and the regenerative start stage that selectively regulates associated flow from the regenerative start stage. The associated method include directing flow from the centrifugal pump to a regenerative start stage in order to supply an associated downstream flow circuit. During low speed starting, a portion of the flow from the regenerative start stage is provided to an ejector that recirculates to an inlet of the centrifugal pump. Once the centrifugal pump provides a predetermined level of at least one of the flow and pressure requirements of the associated flow circuit, the method includes terminating flow from the regenerative start stage.