| 摘要 |
The method controls an engine 1000 comprising a combustion unit 1010, such as a diesel engine, an exhaust gas recirculation (EGR) apparatus 1020 and an exhaust gas treatment apparatus 1030, such as a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) module. The diesel engine comprises one or more cylinders, an inlet 1011 and outlet 1012. The EGR comprises a conduit 1023 having an inlet 1021 and outlet 1022, and an EGR valve 1025 movable between an open and closed position to regulate flow of exhaust gas through the conduit. A controller is configured to control the position of the EGR valve using a primary signal. The method comprises the step of providing a secondary signal to override the primary signal, the secondary signal instructing that the EGR valve should remain in the closed position to prevent exhaust gas flow through the conduit; and injecting fuel upstream of the EGR valve for combustion in the exhaust gas treatment apparatus, preferably to regenerate the DPF or SCR. |
