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Method and device for regulating the NO.sub.x emission of an internal combustion engine

  • US 5,657,732 A
  • Filed: 01/17/1996
  • Issued: 08/19/1997
  • Est. Priority Date: 01/27/1995
  • Status: Expired due to Term
First Claim
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1. Method for regulating an internal combustion engine by adjusting of an air/fuel ratio as a function of operating conditions of said engine, the output of said engine being measured, said method comprising:

  • determining a desired efficiency of said engine under said operating conditions;

    measuring an efficiency under said operating conditions, andaltering the air/fuel ratio of an air/fuel mixture in such a way that the desired and measured efficiencies are equal, the air/fuel ratio being reduced if the measured efficiency is higher than the desired efficiency.

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