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Method and apparatus for reducing cold-phase emissions by utilizing oxygen-enriched intake air

  • US 5,636,619 A
  • Filed: 02/07/1996
  • Issued: 06/10/1997
  • Est. Priority Date: 02/18/1993
  • Status: Expired due to Fees
First Claim
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1. An air control system for an internal combustion engine for supplying ambient air from an air inlet means and/or oxygen enriched air to an air intake of said engine so as to limit pollutants in exhaust gases emitted by said engine, said air control system comprising:

  • a first air flow means through which said ambient air is supplied to said air intake of said engine from said air inlet means;

    a second air flow means having an oxygen enrichment means for producing oxygen enriched air from said ambient air; and

    air directing means associated with said first and second air flow means for controlling the flow of air in said first and second air flow means, said air directing means having at least one state wherein said ambient air flows in said first air flow means to said air intake of said engine and having at least a second state wherein at least a portion of said ambient air is diverted from said first air flow means to said second air flow means through said oxygen enrichment means and into an air plenum wherein oxygen enriched air from said oxygen enrichment means is stored and from which oxygen enriched air is supplied to said air intake of said engine when said air directing means is in said second state.

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