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:
May. 31, 2016
Filed:
Mar. 31, 2014
Ford Global Technologies, Llc, Dearborn, MI (US);
Ross Dykstra Pursifull, Dearborn, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
Hao Zhang, Ann Arbor, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods are provided for rapid zero flow lubrication of a high pressure fuel pump, wherein a fuel rail pressure rapidly responds to commanded duty cycles. A method is needed to control operation of the high pressure pump during times when no direct injection is requested by an engine system and when operation of the high pressure pump is continued to maintain pump lubrication. To lubricate the high pressure pump while gaining zero flow rate data, methods are proposed that involve both open and closed loop control of the high pressure pump.