Caterpillar Inc.

Lucas Industries Limited

Lucas Industries Public Limited Company

Umesh Shah

Glen F Forck

A fuel injector includes a solenoid having two armatures which are complementarily shaped to define a stepped armature gap.

Fuel injector utilizing a solenoid having complementarily-shaped dual

A method of operating a fuel injector comprises the steps of applying a test waveform to a solenoid coil of the injector to cause a response by an armature assembly and measuring the response of the armature assembly while the test waveform is applied to the solenoid coil. A control waveform for the injector is developed as a function of the variation of the measured response of the armature from a selected operational characteristic. The developed control waveform is thereafter applied to the solenoid coil to cause the armature assembly to approach a nominal position.

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Peoria, IL, United States of America

Umesh Shah