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:
Jun. 18, 2019
Filed:
Sep. 25, 2017
Ford Global Technologies, Llc, Dearborn, MI (US);
Ethan D. Sanborn, Saline, MI (US);
Joseph Lyle Thomas, Holt, MI (US);
Xiaoying Zhang, Dearborn Heights, MI (US);
Paul Hollar, Belleville, MI (US);
Daniel Dusa, West Bloomfield, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems are provided for reducing lean air-fuel ratio excursions due to degradation of a port injector while fueling an engine via each of port and direct injection. During a PFDI mode of engine operation, responsive to an indication of port injector degradation, such as due to circuit or injector power issues, intake airflow is limited by reducing the opening of an intake throttle. Air flow is limited to be based only on the direct injected fuel fraction, and independent of the commanded port injected fuel fraction.