发明名称 |
Gas concentration sensing apparatus |
摘要 |
<p>A gas concentration sensor (100) comprises a pump cell (110) for detecting an oxygen concentration in an exhaust gas and a sensor cell (120) for detecting a NOx concentration in the exhaust gas. A porous diffusive layer (101) is interposed between these cells (110, 120). Furthermore, the sensor (100) comprises a heater (103) for heating these cells (110, 120). A control circuit (200) produces a sensor cell voltage having an A.C. component to detect the impedance of sensor cell (120). The electric power supplied to the heater (103) is controlled based on a detected impedance value of the sensor cell (120).
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申请公布号 |
EP1764613(A3) |
申请公布日期 |
2007.08.08 |
申请号 |
EP20060125003 |
申请日期 |
1999.09.22 |
申请人 |
DENSO CORPORATION |
发明人 |
KAWASE, TOMOO;KUROKAWA, EIICHI;HADA, SATOSHI;SUZUKI, TOSHIYUKI |
分类号 |
G01N27/12;G01N27/41;F02D41/14;G01N27/27;G01N27/406;G01N27/407;G01N27/416;G01N27/417;G01N27/419 |
主分类号 |
G01N27/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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