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. 17, 2016
Filed:
Jun. 06, 2014
Ford Global Technologies, Llc, Dearborn, MI (US);
Thomas Alan Brewbaker, Plymouth, MI (US);
Michiel J. Van Nieuwstadt, Ann Arbor, MI (US);
Ford Global Technologies, LLC, Dearborn, MN (US);
Abstract
Methods and systems are provided for adjusting a LP-EGR valve and an LP intake throttle to provide a desired LP-EGR flow rate while maintaining a minimum differential pressure. In one example, a method for a turbocharged engine method comprises: responsive to a differential between intake and exhaust pressure below a threshold, adjusting a LP-EGR valve while adjusting a LP intake throttle to regulate a LP-EGR flow rate and the differential to respective setpoints; and responsive to the differential above the threshold, saturating the LP-EGR valve to minimize the differential while actuating the throttle to regulate the flow rate to its setpoint. In this way, control of the LP-EGR system may be more robust to disturbances at very low differential pressures, require less actuator movement, and increase fuel economy.