Exhaust gas recirculation sensor,申请号US19870055821-传众专利搜索

Exhaust gas recirculation sensor

申请公布号：US5049254(A)

申请号：US19870055821

申请日期：1987.05.29

申请公布日期：1991.09.17

申请人：

FORD MOTOR COMPANY

发明人：LOGOTHETIS, ELEFTHERIOS M.;SOLTIS, RICHARD E.

分类号：G01N27/409;G01N27/41;G01N27/417

主分类号：G01N27/409

摘要：An electrochemical device and method measures the percentage of exhaust gas for circulation in a combined intake air and exhaust gas mixture of an internal combustion engine. Two electrochemical pump cells and a support structure form a restricted volume in communication through an aperture to an ambient of intake air and exhaust gas mixture. Constant voltage is applied across a first pump cell to cause oxygen molecules inside the volume to be pumped out. A constant voltage across the second pump cell causes dissociation of all CO2 and H2O molecules inside the volume. Current flowing in the second pump cell is measured, the current being proportional to the percentage of CO2 plus H2O inside the volume and also proportional to the percentage of CO2 plus H2O in the combined intake air and exhaust gas mixture.