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:
Oct. 13, 2020
Filed:
Feb. 08, 2019
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Joseph Lyle Thomas, Holt, MI (US);
Ethan D. Sanborn, Saline, MI (US);
Paul Hollar, Belleville, MI (US);
Daniel Dusa, West Bloomfield, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/14 (2006.01); F02D 41/24 (2006.01); F02D 41/30 (2006.01); F02D 41/00 (2006.01); F02D 35/02 (2006.01); F02D 41/38 (2006.01); F02D 41/18 (2006.01);
U.S. Cl.
CPC ...
F02D 41/0085 (2013.01); F02D 35/024 (2013.01); F02D 41/008 (2013.01); F02D 41/1402 (2013.01); F02D 41/1441 (2013.01); F02D 41/1443 (2013.01); F02D 41/1454 (2013.01); F02D 41/2445 (2013.01); F02D 41/2451 (2013.01); F02D 41/2454 (2013.01); F02D 41/2477 (2013.01); F02D 41/3094 (2013.01); F02D 41/3836 (2013.01); F02D 41/18 (2013.01); F02D 2200/0602 (2013.01); F02D 2200/0616 (2013.01);
Abstract
Methods and systems are provided for learning a cylinder-to-cylinder air variation. During conditions when a PFDI engine is operated in a port-injection only mode, prior to port fuel injection, a direct-injection fuel rail pressure may be lowered via direct-injection. Then, prior to a spark event in a port-injected cylinder, the direct-injector may be transiently opened to use the rail pressure sensor for estimating a cylinder compression pressure, and inferring cylinder air charge therefrom.