Gm Global Technolgoy Operations, Inc.

Ivan Pelizzoni

Luca Lauritano

Angelo Cancellieri

Filippo Parisi

Eugenio Pisoni

A control apparatus is disclosed for operating a fuel injector of an internal combustion engine. The control apparatus includes an Electronic Control Unit configured to: perform a first calculation task in order to calculate a set of Start Of Injection values (SOI) of a train of injections, calculate an angular position (DIAngPos) of the crankshaft defining the start of a second calculation task, and perform the second calculation task in order to calculate a set of values (ET) of the energizing time of the injections of the train. The angular position (DIAngPos) is calculated as a function of the Start Of Injection value (FirstSOI) of the first injection of the train as calculated by the first calculation task.

Control apparatus for operating a fuel injector

A method of estimating an injection pressure for an internal combustion engine of an automotive system is disclosed that is well-suited for use with a digital pressure sensor, which periodically acquires injection pressure signals. An updated injection pressure value is calculated starting from an injection pressure signal and compensated with a pressure-correcting parameter, based on an elapsed time from the injection pressure signal acquisition, an actual engine speed and an actual fuel injection quantity.

Method of estimating the injection pressure of an internal combustion engine

A method is provided for estimating an instantaneous pressure value Pin a fuel line of a fuel injection system during a fuel multi-injection pattern. The method includes, but is not limited to determining a mean pressure valueinside the fuel line of the fuel injection system (), and correcting the mean pressure valuewith pressure contributions generated by the previous injections of the multi-injection pattern.

Method for estimating an instantaneous pressure value in a fuel line of a fuel injection system

At each engine cycle, nearby the TDCC, an injector is driven so as to perform a fuel injection sequence according to a predetermined pattern (A-Z), including a plurality of successive, separate fuel injection pulses (pulse-pulse N) having respective predetermined durations. The start of the first injection pulse (Pulse) of the sequence is defined as a predetermined angular distance from the TDCC. For each injection pulse (pulse-pulse N) following the first one (pulse) the respective start is selectively determined either as a time distance from the end of the immediately preceding injection pulse (pulse-pulse N&#x2212;1) or as an angular distance from the relevant TDCC, in dependence on the instantaneous value of at least one predetermined parameter.

Method for controlling two consecutive injection pulses in an electrically-actuated fuel injector system for an internal combustion engine, particularly a diesel engine

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Turin, Italy

Ivan Pelizzoni