| 摘要 |
The invention relates to a method for operating an internal combustion engine, in particular an ignition-sparked engine that can essentially run on a lean mixture, or a diesel internal combustion engine, in which at least one operational parameter of said engine is modified in accordance with emission values of the exhaust gas to influence the emission values. According to said method, the emission values of at least two pollutant components of the exhaust gas, such as CO, NO, NO2, NH3, SO2, H2S, CH4 and/or additional HC components are determined and if the emission value of the first of the two or more pollutant components exceeds a predetermined maximum threshold value, the value of at least one operating parameter, for example a throttle position, an exhaust-gas recirculation rate, an ignition point, a tumble-valve position, an injection point, a boost pressure and/or a phase position of the camshaft or similar is modified to reduce the emission value of the first pollutant component, whereby an increase in the emission value is permitted for at least the second of the two or more pollutant components up to a maximum value. The invention also relates to a method for operating an internal combustion engine comprising at least one lambda probe, in particular a broad-band lambda probe, located in the exhaust system, for constantly regulating the lambda value of the exhaust gas. According to said method, the emission values of at least two pollutant components of the exhaust gas, in particular nitrogen oxide, hydrocarbon and/or carbon monoxide are used to calibrate the lambda probe. The invention further relates to a method for operating an internal combustion engine, in which the emissions of said engine are used to diagnose the operating condition of the engine. According to said method, the emission values of at least two pollutant components of the exhaust gas are determined and compared with predefined nominal values and the result of said comparison is used to form a condition signal that is characteristic of the operating condition of the internal combustion engine.
|
