| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To keep measuring accuracy of a differential pressure sensor high for measuring a fore-and-aft differential pressure of a particulate filter. <P>SOLUTION: The present invention corrects output gain of the differential pressure sensor, based on a specified difference width, by specifying the difference width of the output gain by discriminating whether the output gain of the differential pressure sensor is different from a normal value, by comparing a measured value of the differential pressure sensor with predetermined reference differential pressure when operating an engine after oxidizing and removing PM collected to the particulate filter, for solving the above problem. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
