A METHOD FOR CONTROLLING THE FUEL SUPPLY OF AN INTERNAL COMBUSTION ENGINE

摘要

A method for controlling the fuel supply of an internal combustion engine having a throttle valve in the intake air system is provided. It is detected that the crankshaft of the engine is at a predetermined crankshaft angular position. At every detection of this crankshaft position, the pressure in the intake air passage downstream of the throttle valve is detected. The present reference value PBAVEn having predetermined functional relations regarding the present detection value PBAn of the pressure in the intake air passage and the preceding reference value PBAVE(n-1) is set. The amount of the fuel supply into the engine is determined on the basis of this present reference value PBAVEn. The presumptive value of the intake air absolute pressure is calculated in consideration of the correction values with respect to the time lag in control operation and to the fuel deposition on the wall surface in the intake air manifold. Therefore, the proper reference fuel supply amount into the engine can be accurately determined, so that a driveability is improved.