초록 ▼

An electronic engine controller (EEC) controls the delivery of fuel to an internal combustion engine via one or more fuel injectors by executing a background routine to measure a plurality of system conditions including airflow and engine temperature. A response value is generated as a function of a

An electronic engine controller (EEC) controls the delivery of fuel to an internal combustion engine via one or more fuel injectors by executing a background routine to measure a plurality of system conditions including airflow and engine temperature. A response value is generated as a function of an aircharge value, the temperature value and a valve effect value. The EEC detects an interrupt which occurs prior to combustion of an air/fuel mixture within each combustion chamber of said engine, and in response to the interrupt execution of the background routine is halted and a foreground routine is executed in which the airflow is measured, an updated aircharge value is generated and the response value is updated as a function of the difference in aircharge values and a predetermined response alteration value. The aircharge value is replaced with the updated aircharge value. A base fuel injector signal, generated by known methods, is modified by the response value, and execution of the background routine is restarted upon completion of the foreground routine.

대표청구항 ▼

A method of controlling delivery of fuel to an intake port, in an internal combustion engine including an induction system comprised of an intake port, at least one interior surface including an intake valve for opening and closing the intake port and injector means for delivering fuel to a combusti

A method of controlling delivery of fuel to an intake port, in an internal combustion engine including an induction system comprised of an intake port, at least one interior surface including an intake valve for opening and closing the intake port and injector means for delivering fuel to a combustion chamber of the engine in an amount controlled by a fuel injector signal generated by an engine control means, the method comprising the steps of: in a background routine executed by said engine control means, measuring a temperature value indicative of the temperature of the induction system; determining a valve effect value indicative of the effect of intake valve temperature on the vaporization of fuel in the induction system; generating a first value indicative of a mass of fuel residing on the interior surface of the induction system while the engine is in a steady state condition, in response to an aircharge value and the temperature value; and calculating an equilibrium fuel time constant value indicative of a rate of change of the fuel mass on the interior surface of the induction system while the engine is in a transient condition; and in an interrupt routine executed by the engine control means upon detection of a predefined interrupt signal; measuring the mass flow rate of air entering said induction system to generate an updated value for said aircharge value; altering said first value as a function of a second value which is indicative of the change in fuel mass on the interior surface of the induction system between said aircharge value and said updated value for the aircharge value; generating a transient fuel compensation value as a function of said altered first value, said equilibrium fuel time constant value and said valve effect value; and generating said fuel injector signal as a function of said altered transient fuel compensation value.