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:
Nov. 01, 2011
Filed:
Jul. 31, 2009
Daniel Joseph Styles, Canton, MI (US);
Kevin Chen, Canton, MI (US);
David Curtis Ives, Ann Arbor, MI (US);
Frank M Korpics, Belleville, MI (US);
Norman Hiam Opolsky, West Bloomfield, MI (US);
Timothy Webb, Ann Arbor, MI (US);
Daniel Joseph Styles, Canton, MI (US);
Kevin Chen, Canton, MI (US);
David Curtis Ives, Ann Arbor, MI (US);
Frank M Korpics, Belleville, MI (US);
Norman Hiam Opolsky, West Bloomfield, MI (US);
Timothy Webb, Ann Arbor, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A system and method for controlling an engine control an EGR cooler bypass valve to divert at least a portion of EGR flow around an EGR cooler when operating under cooler fouling/plugging conditions, such as during idle, off-idle, exhaust system warm up and DPF regeneration or other post injection operation with EGR gas temperature below a corresponding threshold or with EGR low-temperature coolant temperature below a corresponding threshold. The system and method reduce exhaust gases passing through the EGR cooler that contain a high concentration of unburned or partially unburned fuel when the temperature in the EGR system is lower than the fuel condensation temperature.