초록 ▼

An electronic control fuel injection system for a spark ignition internal combustion engine is disclosed which controls air flow rate as a function of fuel flow rate by converting an operator\s depression of an accelerator pedal to an electric signal, applying the signal to a computer which preferen

An electronic control fuel injection system for a spark ignition internal combustion engine is disclosed which controls air flow rate as a function of fuel flow rate by converting an operator\s depression of an accelerator pedal to an electric signal, applying the signal to a computer which preferentially determines the fuel flow rate and then the air flow rate, and feedback controlling the air flow rate by using the determined air flow rate and an actual air flow rate sensed by a pressure sensor provided at the upstream and downstream sides of a throttle valve and/or a throttle opening sensor. The computer also receives signals representative of the fuel line pressure and the air pressure in a region adjacent one or more injectors and uses this in adjusting the supply of fuel to the injector(s) to obtain a predetermined constant pressure difference thereacross. A unique digital flow control valve may also be used to precisely adjust the air flow rate. The system eliminates automobile “hesitation”while satisfying the requirements of fuel economy and low emissions.

대표청구항 ▼

An electronic control fuel injection system for an internal combustion engine for preferentially determining a fuel flow rate according to the stroke of an accelerator pedal and subordinately determining an air flow rate in response to the engine operating state comprising: a fuel metering mechanism

An electronic control fuel injection system for an internal combustion engine for preferentially determining a fuel flow rate according to the stroke of an accelerator pedal and subordinately determining an air flow rate in response to the engine operating state comprising: a fuel metering mechanism for selecting a fuel discharge amount in accordance with the depression stroke of an accelerator pedal and feeding said selected fuel discharge amount through an injector mechanism to said engine, an air flow sensor for detecting the intake air flow rate to said engine, a fuel pressure detector provided in a fuel supply line feeding said injector mechanism for detecting fuel pressure in said line, mechanism, at least one engine parameter sensor, a computer receiving output signals from said fuel metering mechanism, said air flow sensor and said engine parameter sensor and determining therefrom an optimum air flow rate and producing an air flow rate control signal in accordance with a desired operating state of the engine, and a throttle valve control mechanism for setting the opening of a throttle valve of said engine in accordance with the air flow rate control signal produced by said computer.