CONTROL METHOD FOR AIR-FUELRATIO OF INTERNAL COMBUSTION ENGINE

摘要

In the system the supplied fuel is determined in accordance with the amount of driver operation of the accelerator or throttle valve opening. The mixture gas is controlled by controlling the intake air amount to improve the fuel combustion efficiency. Although the fuel supplied to the engine may be controlled directly by the amount of accelerator operation that is the torque requirement of the driver to controll the intake air amount to achieve the optimum air-fuel ratio. In the process the amount of air passing through the main air intake path may be reduced. This is prevented by maintaining the fuel amount determined according to the throttle opening, i.e. by adding the fuel by the reduced amount.