| 摘要 |
<p>An exhaust system (18) includes an exhaust passage (26) configured to receive exhaust from a combustion engine (12), a heat exchanger (32) disposed within the exhaust passage (26), and a reductant supply (50) fluidly connected to the heat exchanger (32), the reductant supply (50) including methane. The exhaust system (18) also includes a first catalyst fluidly connected to the heat exchanger (32) and configured to receive methane from the reductant supply (50) via the heat exchanger (32). The exhaust system further includes a second catalyst disposed within the exhaust passage (26) and configured to receive the exhaust from the combustion engine (12) via the heat exchanger (32). The exhaust system also includes a clean-up catalyst disposed within the exhaust passage (26) and configured to receive a combined flow. The combined flow includes the exhaust and the methane exiting the first catalyst.</p> |
