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Combustible-gas sensor, diagnostic device for intake-oxygen concentration sensor, and air-fuel ratio control device for internal combustion engines

  • US 6,739,177 B2
  • Filed: 03/05/2002
  • Issued: 05/25/2004
  • Est. Priority Date: 03/05/2001
  • Status: Expired due to Fees
First Claim
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1. A combustible-gas sensor that is equipped with a sensor device having a pair of electrodes which are formed on the surface of an oxygen-ion conductor and one of the electrodes is disposed in a space where measurement-target gas containing combustible gas and oxygen exists and that detects a concentration of combustible gas on the basis of a change in the concentration of oxygen contained in measurement-target gas resulting from an oxidizing reaction of combustible gas, comprising:

  • a correction portion that corrects a deviation in sensor output resulting from a pressure of measurement-target gas, on the basis of a sensor output in the atmosphere of a reference gas.

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