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Method and apparatus for determining the hydrocarbon conversion efficiency of a catalytic converter

  • US 5,265,417 A
  • Filed: 01/07/1993
  • Issued: 11/30/1993
  • Est. Priority Date: 01/07/1993
  • Status: Expired due to Term
First Claim
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1. A method for determining the hydrocarbon conversion efficiency of a catalytic converter, which is .placed in the exhaust gas of an internal combustion (IC) engine to reduce the pollutants, comprising the steps of:

  • a. determining the hydrocarbon concentration of the exhaust gas upstream of the catalytic converter by sampling the exhaust gas and passing the sample to a catalytic differential calorimetric sensor;

    b. contacting the catalyst in the converter with the IC exhaust gas;

    c. determining the hydrocarbon concentration of the exhaust gas downstream of the catalytic converter by sampling the exhaust gas and passing the sample to the catalytic differential calorimetric sensor; and

    d. comparing the hydrocarbon content of the exhaust gas samples from steps (a) and (c) and thereby determining the hydrocarbon conversion efficiency of the catalytic converter.

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