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:
Apr. 29, 2014
Filed:
Apr. 24, 2012
Michael James Uhrich, West Bloomfield, MI (US);
Stephen B. Smith, Livonia, MI (US);
James Michael Kerns, Trenton, MI (US);
Shane Elwart, Ypsilanti, MI (US);
Jason Aaron Lupescu, Ypsilanti, MI (US);
Michael James Uhrich, West Bloomfield, MI (US);
Stephen B. Smith, Livonia, MI (US);
James Michael Kerns, Trenton, MI (US);
Shane Elwart, Ypsilanti, MI (US);
Jason Aaron Lupescu, Ypsilanti, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems are provided for operating an engine having a hydrocarbon retaining system and an emission control device coupled to an engine exhaust, the engine exhaust comprising a venturi. One example method comprises, during a storing condition, routing exhaust gas through the venturi without generating a venturi action, and then to the hydrocarbon retaining system, while bypassing the emission control device, to store hydrocarbons in the hydrocarbon retaining system, and during a purging condition, routing exhaust gas through the venturi while generating venturi action, then to the emission control device, and then to the hydrocarbon retaining system, to purge stored hydrocarbons, wherein a flow of purged hydrocarbons is drawn back to the venturi via venturi action.