发明名称 |
SENSOR CONTROL DEVICE AND SENSOR CONTROL METHOD |
摘要 |
An object is to perform accurate diagnosis of a failure in which an input signal from an amplification circuit assumes an anomalous value in an intermediate range between GND and Vcc. When at least one of a first NO x concentration Ip2W based on the output OP1 of a first differential amplification circuit 210 and a second NO x concentration Ip2N based on the output OP2 of a second differential amplification circuit 220 falls within an anomaly diagnosis range ZN, the difference D between the first NO x concentration Ip2W and the second NO x concentration Ip2N is obtained, and the difference D is stored in a difference accumulation buffer BF such that 16 values of the difference D continuously sampled up to the present are stored. The integrated value (difference integral value) Dint of the difference D is obtained. When the difference integrated value Dint becomes equal to or greater than a predetermined value Di0, a diagnosis result of "anomalous" is provided. |
申请公布号 |
EP2461158(A1) |
申请公布日期 |
2012.06.06 |
申请号 |
EP20100823176 |
申请日期 |
2010.10.06 |
申请人 |
NGK SPARK PLUG CO., LTD. |
发明人 |
YAZAWA, KATSUNORI;KIMOTO, YUJI |
分类号 |
G01N27/26;G01N27/12;G01N27/409;G01N27/41;G01N27/416;G01R31/08 |
主分类号 |
G01N27/26 |
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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