| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump control device which shortens time necessary for the learning of a discharge amount, in a fuel injection system which adjusts with an adjustment valve the adjustment timing at which a fuel supply pump starts or finish the pressure-sending of fuel in a pressure-sending stroke.SOLUTION: When a learning condition of a discharge amount is established (S400: Yes), a pump control device discharges fuel from a fuel supply pump by controlling an adjustment valve at command timing so that the discharge amount reaches a target discharge amount for the learning of the discharge amount (S402). An actual amount of the fuel supply pump is estimated from a rise amount of common rail pressure when the fuel supply pump discharges the fuel (S404), and the actual timing at which the adjustment valve is valve-closed is acquired on the basis of an actual discharge amount (S406). A difference between the command timing and the actual timing is calculated as a difference of angle timing (S408), and the command timing for controlling the adjustment valve from the next time is corrected with the difference of the angle timing as a correction value (S410). |
