| 摘要 |
The emission cleaning system, comprising an NOx storage/reduction catalytic converter, a reducing agent feeder, and an electronic control unit (ECU), is designed so that the ECU estimates the moment for starting the catalyst regeneration process based on the long-term operation of the engine. The emission cleaning system, comprising an NOx storage/reduction catalytic converter, a reducing agent feeder, and an electronic control unit (ECU), is designed so that the ECU estimates the moment for starting the catalyst regeneration process based on the long-term operation of the engine. The system incorporates an NOx concentration detector, situated after the catalytic converter, which provides a signal for the ECU to initiate regeneration of the catalyst on completion of the firing process. The detector can also detect an air to fuel ratio or oxygen. |
