| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an integration term of feedback control from being wastefully renewed in a case where a deviation between a target fuel pressure and an actual fuel pressure becomes large transitionally because of a change in the target fuel pressure, or a load factor or the like. <P>SOLUTION: When a discharge rate of a high-pressure fuel pump is feedback-controlled so that the actual fuel pressure becomes a target fuel pressure, and the amount of change in the target fuel pressure (dlprreq) or the amount of change in the load factor (dlklfwd) reaches a predetermined value or more, and when the deviation between the target fuel pressure and the actual fuel pressure changes transitionally, the renewal of the integration term of feedback control is suspended until the discharge of the fuel, which is in accordance with a pump duty calculated in a state where the transitional change has occurred, has been completed. Thus, needless renewal of the integration term at the time when the deviation between the target fuel pressure and the actual fuel pressure becomes large transitionally is prevented, and an overshoot of the fuel pressure is accurately controlled. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
