초록 ▼

A fuel injection control system coupled to a multiport fuel injected engine for adjusting the air/fuel mixture of each combustion chamber to a preselected level. A plurality of fuel command controllers provides a separate fuel command signal to each fuel injector in response to a single base fuel co

A fuel injection control system coupled to a multiport fuel injected engine for adjusting the air/fuel mixture of each combustion chamber to a preselected level. A plurality of fuel command controllers provides a separate fuel command signal to each fuel injector in response to a single base fuel command. During each correction interval of a correction time period, each of the fuel command signals is perturbed or offset in a predetermined sequence by a predetermined amount. A measurement of the average of air/fuel ratios among the combustion chambers is taken each correction interval. Airflow inducted into the combustion chambers is also measured. In response to these measurements, and the known fuel offsets, the actual fuel delivered by each fuel injector is calculated. All the fuel command controllers are corrected in response to associated fuel calculations to balance the air/fuel ratios of each combustion chamber.

대표청구항 ▼

A fuel injection control method for correcting variations in fuel delivered among a plurality of fuel injectors each being coupled to an engine combustion chamber, said fuel injection control method comprising the steps of: generating a separate fuel command signal for each of the fuel injectors suc

A fuel injection control method for correcting variations in fuel delivered among a plurality of fuel injectors each being coupled to an engine combustion chamber, said fuel injection control method comprising the steps of: generating a separate fuel command signal for each of the fuel injectors such that fuel delivered by each of the injectors is proportional to said fuel command signal coupled to the respective fuel injector; offsetting each of said fuel command signals in a predetermined sequence during a correction time period; providing a measurement of average air/fuel ratio among the combustion chambers during said correction period; calculating the variation in fuel charges actually delivered among the fuel injectors during said correction time period in response to the amount of said offset and said measurement of air/fuel ratio; and correcting said fuel command signals in response to said calculation such that each of the fuel injectors delivers substantially the same amount of fuel in response to said fuel command signal.