EGR system using selective fuel and ERG supply scheduling

An apparatus for reducing deposits of material in an internal combustion engine, the engine having a plurality of cylinders with each cylinder having a combustion chamber, at least one intake port and at least one exhaust port, said apparatus comprising:

• a plurality of fuel injectors for controllably delivering fuel to the combustion chamber of each said cylinders, at least one of said plurality of fuel injectors correspondingly coupled to each of said cylinders;
• a plurality of exhaust gas recirculation valves for controllably delivering recirculated exhaust gases to each of said cylinders, at least one of said exhaust gas recirculation valves correspondingly coupled to each of said cylinders and
• an electronic control unit in electrical communication with said fuel injectors, exhaust gas recirculation valves, and engine, said electronic control unit being adapted to deliver an electronic signal to said fuel injectors for injecting fuel subsequent to combustion to only a first plurality of cylinders and, at the same time, being adapted to deliver an electronic signal to said exhaust gas recirculation valves for supplying recirculated exhaust gas to only a second plurality of cylinders.