Patent ID: 7490466

Claim:
A power source for use with an exhaust gas recirculation and selective catalytic reduction system, comprising: a main air-intake passage fluidly connected to a first air-intake passage and a second air-intake passage; a first cylinder group fluidly connected to the first air-intake passage and a first exhaust passage, wherein the first exhaust passage includes an ammonia-producing catalyst configured to convert at least a portion of a fluid in the first exhaust passage into ammonia; a second cylinder group fluidly connected to the second air-intake passage and a second exhaust passage; a third cylinder group fluidly connected to the second air-intake passage; a recirculation loop that includes the second air-intake passage and the third cylinder group; and a merged exhaust passage configured to connect the first exhaust passage and the second exhaust passage to facilitate a reaction between ammonia and NOx to at least partially remove NOx from the merged exhaust passage.