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An improved fuel injection control apparatus, in which a reference pressure is provided to a pressure regulator, for simplifying the fuel supply system by preventing the fuel quantity injected from injection valves into an engine from being influenced by variations in the air intake pressure. A pres

An improved fuel injection control apparatus, in which a reference pressure is provided to a pressure regulator, for simplifying the fuel supply system by preventing the fuel quantity injected from injection valves into an engine from being influenced by variations in the air intake pressure. A pressure regulating device disposed in a fuel supply pipe between a fuel pump and the fuel injection valve regulates the pressure of fuel supplied from the fuel pump to the fuel injection valve so that the pressure is proportional to the predetermined pressure, without returning fuel from the injection valve to the fuel tank. An intake pressure detecting device detects the pressure in the intake pipe, and a fuel injection quantity correcting device corrects the fuel injection quantity according to deviations of the fuel pressure regulated by the pressure regulating device from a proper value due to the differential pressure between the pre-determined pressure of the pressure regulating means and the intake pressure. Accordingly, he fuel injection quantity injected from the injection valve is corrected based on the operating condition of the engine due to the variation of the intake pressure. As a result, the fuel supply system is simplified.

대표청구항 ▼

A fuel injection control apparatus for an internal combustion engine comprising: a fuel tank for storing fuel to be supplied to said internal combustion engine; a fuel injection valve disposed in an intake pipe of said engine for injecting fuel into said intake pipe; a fuel pump for pumping fuel fro

A fuel injection control apparatus for an internal combustion engine comprising: a fuel tank for storing fuel to be supplied to said internal combustion engine; a fuel injection valve disposed in an intake pipe of said engine for injecting fuel into said intake pipe; a fuel pump for pumping fuel from said fuel tank to said fuel injection valve; pressure regulating means disposed in a fuel supply pipe between said fuel pump and said fuel injection valve for regulating pressure of fuel supplied from said fuel pump to said fuel injection valve such that said pressure is proportional to a predetermined pressure, which is a pressure other than a pressure in said intake pipe, without returning fuel from said injection valve to said fuel tank; intake pressure detecting means for detecting pressure in said intake pipe; fuel injection quantity control means for controlling an amount of fuel supplied from said fuel injection valve to said internal combustion engine; and fuel injection quantity correcting means for correcting said amount of fuel supplied from said fuel injection valve based on a deviation of said fuel pressure regulated by said pressure regulating means from a proper value due to a differential pressure between said predetermined pressure of said pressure regulating means and said intake pressure.