초록 ▼

Average pressure of pressure in an intake passage is calculated. A basic injection quantity is determined by engine speed and the average pressure. On the other hand, estimated pressure is estimated from engine speed and throttle position. A correcting coefficient is obtained from the average pressu

Average pressure of pressure in an intake passage is calculated. A basic injection quantity is determined by engine speed and the average pressure. On the other hand, estimated pressure is estimated from engine speed and throttle position. A correcting coefficient is obtained from the average pressure and the estimated pressure, and the basic injection quantity is corrected with the correcting coefficient.

대표청구항 ▼

A system for controlling fuel injection of an engine for a motor vehicle having an intake passage, a throttle valve provided in the intake passage, and a fuel injector for injecting fuel by a quantity determined by the system, the system comprising: an engine speed sensor producing an engine speed s

A system for controlling fuel injection of an engine for a motor vehicle having an intake passage, a throttle valve provided in the intake passage, and a fuel injector for injecting fuel by a quantity determined by the system, the system comprising: an engine speed sensor producing an engine speed signal dependent on speed of the engine; a throttle position sensor producing a throttle position signal dependent on opening degree of the throttle valve; a pressure sensor producing a pressure signal dependent on pressure in the intake passage; first calculator means for averaging pressures represented by the pressure signal and for producing an average pressure signal; estimating means responsive to the engine speed signal and the throttle position signal for estimating pressure in the intake passage and for producing an estimated pressure signal; means responsive to the average pressure signal and the estimated pressure signal for producing a correcting signal; second calculator means responsive to the engine speed signal and the average pressure signal for producing a basic fuel injection quantity signal; and corrector means for correcting the basic fuel injection quantity signal with the correcting signal, for determining the quantity of fuel to be injected.