Electronic fuel injection system for large compression ignition engine

An electronic fuel injection system for a compression ignition engine having a per cylinder displacement volume of at least 5.5 liters, the system comprising:

• individual fuel delivery means for each corresponding cylinder, said fuel delivery means having a constant displacement fuel chamber;
• means for generating a timing signal and a cylinder index signal;
• means, responsive to said timing signal and said cylinder index signal, for electronically controlling said individual fuel delivery means and for generating an overload indication signal;
• load control means for outputting a signal corresponding to one of a plurality of selected engine speed levels and responsive to activate and/or deactivate a controllable load in response to said overload indication signal;
• said individual fuel delivery means further having electronically actuated valve means, responsive to a fuel control output signal, for providing fuel to a corresponding fuel injecting means;
• such that said electronic fuel control means generates said overload indication signal by comparing an actual speed determined from said timing signal to a desired speed determined by said electronic fuel control means.

An electronic fuel injection system for a compression ignition engine having a per cylinder displacement volume of at least 5.5 liters, the system comprising:

• individual fuel delivery means for each corresponding cylinder, said fuel delivery means having a constant displacement fuel chamber;
• multitrack optical shaft encoding means, operatively coupled to a rotating cam shaft, for generating a timing signal and a cylinder index signal;
• means, responsive to said timing signal and said cylinder index signal, for electronically controlling said individual constant displacement fuel delivery means;
• and
• said constant displacement fuel delivery means having means, responsive to an output signal from said electronic control means, for providing a fuel delivery volume range of between approximately 100-1600 mm.sup.3 /stroke over a fuel injection pressure range of at least between 10-20 k.p.s.i. to a corresponding fuel injecting means;
• said delivery means for providing a fuel delivery volume over said injection pressure range comprising electronically controlled valve means responsive to said output signal for providing a portion of fuel flow spill from said constant displacement fuel pumping chamber, and further comprising valve means, in fluid communication with said electronically controlled valve means, for providing additional fuel flow spill from said constant displacement fuel chamber.