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Controlling apparatus for introduction air into exhaust pipe of internal combustion engine

  • US 5,493,858 A
  • Filed: 06/18/1993
  • Issued: 02/27/1996
  • Est. Priority Date: 06/23/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus for controlling the introduction of air into an exhaust pipe of an internal combustion engine, comprising;

  • means for improving the efficiency of purification of exhaust gases in said exhaust pipe, said improving means comprising;

    means for introducing air into said exhaust pipe of said internal combustion engine upstream of a catalyst via an air introducing pipe; and

    controlling means for stopping the introduction of air to an exhaust side during the starting of said internal combustion engine or during starting and a predetermined time duration after starting.

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