BACKGROUND

The present application relates to apparatuses, methods, systems, and techniques for determining and adjusting fuel injection control parameters and controlling fuel injection during engine operation. Under some operating conditions, engines benefit from delivering very small quantity injection pulses in order to improve fuel economy, improve engine performance, reduce audible noise, and improve emission. It would be desirable to provide a robust technique to accurately and precisely determine or estimate and deliver very small injection pulses for each individual injector in an injection system, under any operating conditions, and throughout the lifetime of the engine system. In order to control fuel injection to such a degree of accuracy and precision, it is necessary to know the injector commanded on-time associated with an injection quantity at any operating pressure. A number of proposals have been made to determine or estimate these minimum parameters. But conventional approaches suffer from a number of drawbacks, limitations, shortcomings and undesirable results including, for example, the occurrence of injection at undesired times, parasitic drag on fuel economy, increased noise, vibration and harshness, and increases in undesirable emissions. There remains a substantial need for the unique apparatuses, methods, systems, and techniques disclosed herein.

DISCLOSURE OF ILLUSTRATIVE EMBODIMENTS

For the purposes of clearly, concisely and exactly describing illustrative embodiments of the present disclosure, the manner, and process of making and using the same, and to enable the practice, making and use of the same, reference will now be made to certain exemplary embodiments, including those illustrated in the figures, and specific language will be used to describe the same. It shall nevertheless be understood that no limitation of the scope of the invention is thereby created and that the invention includes and protects such alterations, modifications, and further applications of the exemplary embodiments as would occur to one skilled in the art.

SUMMARY OF THE DISCLOSURE

Exemplary embodiments include unique apparatus, methods, systems and techniques for determining and adjusting fuel injection control parameters and controlling fuel injection during engine operation. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.

