Patent ID: 7918207

Claim:
A fuel delivery system for an engine, comprising: a first fuel injector configured to deliver a first fuel to a first cylinder of the engine; a second fuel injector configured to deliver a second fuel to the first cylinder of the engine; an electrical relay system disposed between a first electrical potential and each of the first fuel injector and the second fuel injector; an electronic driver disposed between a second electrical potential and each of the first fuel injector and the second fuel injector; a control module configured to: switch the electrical relay system to a first position to select the first fuel for delivery to the engine, the first position electrically coupling the first electrical potential to the first fuel injector; switch the electrical relay system to a second position to select the second fuel for delivery to the engine, the second position electrically coupling the first electrical potential to the second fuel injector; and close the electronic driver to deliver the selected one of the first fuel or the second fuel to the first cylinder via a respective one of the first fuel injector or the second fuel injector; adjust a fuel injection rate associated with one of the first fuel injector and the second fuel injector relative to the other of the first fuel injector and the second fuel injector by varying a fuel pump parameter so that each of the first fuel injector and the second fuel injector provide a substantially similar air-fuel mixture in the first cylinder over a given fuel injection duration; and switch the electrical relay system between the first position and the second position while one of the first fuel injector and the second fuel injector is delivering fuel to the first cylinder to cause the other of the first fuel injector and the second fuel injector to complete fueling of the first cylinder.