| 摘要 |
PURPOSE: A fuel injection control method is provided to execute a theoretical air-fuel ratio control and stable air-fuel ratio control at a thin section, in various engines. CONSTITUTION: A fuel injection control method comprises steps of determining whether a vehicle is stably operated without a load change or an engine RPM(Revolutions Per Minute) change for predetermined time in a state in which an engine is warmed up by detecting the state of an operating vehicle(S100¯S130); determining an entry into feedback control in which an air-fuel ratio is decided near theoretical air-fuel ratio(S140); determining whether the engine is in a thin combustion state after setting up the compensation amount, compensated according to a signal applied from an oxygen sensor, in a compensation map table(S150¯S170); multiplying the basic fuel amount set in a map table by the compensation amount set the compensation map table and calculating the fuel amount in thin combustion(S180); and controlling the fuel amount sucked into an engine combustion chamber according to the calculated injection fuel amount.
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