| 摘要 |
In a pulse width modulated, fuel injected internal combustion engine having at least one injector characterized by transient fuel flow associated with injector opening and closing which tends to decrease the accuracy of the amount of injected fuel for short pulse durations, apparatus and method are provided for increasing the accuracy of injected fuel amount at low engine fuel requirements. When the normal determined pulse duration is less than a predetermined minimum pulse duration, the normal energization of the fuel injector is prevented and a number representing said determined pulse duration is summed in an accumulator. When the accumulator sum reaches the predetermined minimum pulse duration, the injector is energized for a duration at least equal to the predetermined minimum duration and the accumulator sum is reduced by a number corresponding to said duration.
|
