DEVICE FOR REGULATING QUANTITY OF FUEL-AIR MIXTURE

摘要

PURPOSE:To provide a mixture quantity regulation device in which the pressure at a region most restricted by an air restrictor valve interlocked with an accelerator pedal is detected to calculate fuel pressure to regulate fuel by a fuel control valve so that a mixture is increased for acceleration, without delay. CONSTITUTION:Fuel is discharged into a region A through passages 2-4, 2-6 and atomized and mixed with the flow of air. A spring 2-7 acts to push an air restrictor valve 2-2 in a direction for closing. The flow of air is restricted by releasing an accelerator pedal 1. An electric controller 3 calculates the velocity of the air flow on the basis of the output P1 of a pressure detector 4 and then calculates required fuel pressure P2 on the basis of the air flow velocity and the pressure level P1. An electric signal corresponding to the required fuel pressure P2 is supplied to a fuel pressure controller 5 to provide the fuel pressure P2 to attain a prescribed air fuel ratio. The rate QA of the air flow is drastically increased by the sharp depression of the accelerator pedal and thereafter gradually increased with the rise in the rotational frequency of the engine.