COMMON RAIL TYPE FUEL INJECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a common rail type fuel injection device capable of accurately controlling fuel injection quantity by preventing fuel injection pressure after pressure increase from fluctuating according to difference of fuel injection timing.

SOLUTION: Rail pressure correction quantity KP with periodical fluctuation of common rail pressure due to fuel pumping by a pressure pump taken into account is calculated based on fuel injection timing Tij and target injection pressure tgtPij. Injection pressure after pressure increase can be equalized irrespective of difference of injection timing by correcting the target rail pressure tgtPrail by the calculated rail pressure correction quantity KP.

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