CONTROL DEVICE FOR FUEL SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To improve exhaust emission and drivability by accurately controlling fuel delivery quantity of the pump suitably reflecting slippage of characteristics of a fuel supply pump.

SOLUTION: High pressure fuel to be injected and supplied to an engine 10 is accumulated in a common rail 12, and a high pressure pump 13 is driven by power of the engine to pressure feed fuel to the common rail 12. ECU 20 calculates slippage of characteristics of the high pressure pump 13 under an idling operation condition of the engine and calculates slippage of characteristics of the high pressure pump 13 under a cruise travel condition. Fuel delivery quantity of the high pressure pump 13 is controlled by reflecting slippages of characteristics at the two points.

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