Vehicle with reduced emission of harmful component
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United States of America Patent
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Jun 24, 2003
Grant Date -
May 2, 2002
app pub date -
Sep 24, 2001
filing date -
Oct 27, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
An amount of oxygen accumulated in a catalytic converter after an engine stop by discontinuing a fuel supply to an engine is controlled to be within a preset range by controlling an engine speed into a preset range, controlling an engine revolution phase into a preset range, feeding air into the catalytic converter until the accumulated amount of oxygen becomes saturated, and controlling a catalytic converter temperature into a preset temperature range. Increase of an appropriate amount of the fuel at re-starting of the engine may prevent oxygen from deteriorating the NOx removing function without degrading an emission and the fuel efficiency.
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