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. 20, 2014
Filed:
Jan. 15, 2013
Applicant:
Ford Global Technologies, Llc, Dearborn, MI (US);
Inventors:
Stephen Michael White, Saline, MI (US);
Mike Liebert, Saline, MI (US);
Andrew Clement Dame, Saline, MI (US);
Ross Dykstra Pursifull, Dearborn, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02N 11/08 (2006.01); F02D 41/06 (2006.01); F02M 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and systems are provided for reducing variability in air-fuel control due to variations in brake booster vacuum levels at an engine start. A throttle position is adjusted during an engine start based on the vacuum availability in the brake booster to control a rate of intake aircharge flow. By allowing aircharge to enter the intake manifold at a more consistent rate, air-fuel control is improved and exhaust emissions are reduced.