| 摘要 |
A system (100) for controlling an air/fuel ratio in an engine (105) based on catalyst deactivation includes an NH 3 detector (120) disposed downstream from the three way catalyst (110), and a subsystem (135) that compares measured values of NH 3 concentration with a nominal value of NH 3 concentration at rich operating conditions. A subsystem (145) adjusts the air/fuel ratio based on the measured value of NH 3 concentration and estimated CO concentration. |
