Programmable fuel injector current waveform control and method of operating same

An apparatus for variably controlling an injection current waveform to a fuel injector on a compression ignition engine, said apparatus comprising:

• an electronic controller, said electronic controller producing at least one desired current waveform parameter and a control signal;
• a memory device associated with said electronic controller;
• a control circuit connected to said electronic controller and receiving said desired current waveform parameter and said control signal;
• wherein said control circuit is capable of producing a plurality of injection current waveforms corresponding to a plurality of fuel injectors and control circuit produces one of said plurality of injection current waveforms responsive to said desired current waveform parameter and said control signal;
• a first desired current waveform parameter;
• a second desired current waveform parameter;
• a multiplexer receiving said first and second desired current waveform parameters;
• an application specific integrated circuit (injector controller) receiving said control signal and producing a mulitplexer control signal;
• said control circuit receiving a current feedback signal corresponding to current flowing through a fuel injector;
• and
• said injector controller producing a multiplexer control signal causing said multiplexer to output said second desired current waveform parameter in response to said current feedback signal indicating a current corresponding to said first desired current waveform parameter.