Early exhaust valve opening for improved catalyst light off
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United States of America Patent
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Dec 27, 2016
Grant Date -
Feb 12, 2015
app pub date -
Jul 28, 2014
filing date -
Jul 26, 2013
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Abstract
Energy to speed heating of a catalyst associated with an internal combustion engine can be provided in the form of sensible energy (heat) via hot combustion products. In some variations, timing of opening and/or closing of an exhaust valve can be manipulated to increase sensible heat delivered to the catalyst in the exhaust gases.
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