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Control of exhaust flow in an engine including a particulate filter

  • US 9,080,482 B2
  • Filed: 08/27/2013
  • Issued: 07/14/2015
  • Est. Priority Date: 09/29/2009
  • Status: Active Grant
First Claim
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1. A method for a turbocharged engine, comprising:

  • generating vacuum during engine operation;

    storing the vacuum;

    during or after engine shutdown, drawing ambient air through a particulate filter via the stored vacuum and closing a tailpipe valve downstream of the particulate filter, the drawing including drawing the ambient air from an intake system, through an LP-EGR system to the particulate filter to regenerate the particulate filter, and through an HP-EGR system to an intake manifold.

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