| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a deterioration signal generator for an oxygen sensor capable of correcting the off-set, when pseudo-generating a sensor output signal output as a deterioration signal, when the oxygen sensor with the sensor output signal is varied abruptly and deteriorates in the theoretical air-fuel ratio a boundary. <P>SOLUTION: A preset off-set value "Offset" is superimposed (S14) with a voltage value Vin of a reference signal acquired from a reference sensor in every 1 ms (S12), to generate the deterioration signal (voltage value Vout). A value of the off-set value Offset is set by a direction (positive or negative) and a level, and the deterioration signal (voltage value Vout) is generated shiftedly to a rich side (higher voltage value side) or a lean side (lower voltage value side) by the set level of the voltage value Vin, set optionally by adding the off-set value "Offset" to the voltage value Vin of the reference signal. <P>COPYRIGHT: (C)2008,JPO&INPIT |
