| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an abnormality diagnostic device for a pressure sensor and a method for diagnosing abnormality of the pressure sensor, certainly detecting the abnormality of the pressure sensor detecting pressure in a common rail. <P>SOLUTION: This abnormality diagnostic device for the pressure sensor for diagnosing the presence or absence of the abnormality of the pressure sensor detecting the pressure in the common rail of an accumulator fuel injection device includes: a rail pressure storage section storing pressure in the common rail detected by the pressure sensor; an internal combustion engine stop detection section detecting the stop of an internal combustion engine; a power distribution control section distributing the holding current of a predetermined value with respect to a pressure control valve for adjusting the amount of fuel discharged from the common rail, when the internal combustion engine is stopped; and an abnormality determination section determining the presence or absence of the abnormality of the pressure sensor by using a pressure value in the common rail detected after lapse of a predetermined period after the holding current is distributed to the pressure control valve. <P>COPYRIGHT: (C)2011,JPO&INPIT |
