| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of difficulty of a highly accurate control of an injection amount, regardless of fluctuation in fuel pressure in an accumulator. SOLUTION: A detection value NPC(n-1) is acquired at a predetermined rotational angle before fuel injection. A value (fluctuation amountΔP) is calculated by subtracting the detection value NPC(n-1) from a detection value of fuel pressure during a period in which fuel is actually injected. In the next time or later, a value acquired by adding the fluctuation amountΔP to the detection value NPC(n) of fuel pressure at a predetermined rotational angle before fuel injection of each time, is used as a predicted value of fuel pressure in fuel injection, and an instruction injection period is set based on the predicted value. COPYRIGHT: (C)2009,JPO&INPIT
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