| 摘要 |
A method for a closed-loop or an open-loop control of a forced-induction internal combustion engine that includes an exhaust turbocharger having an exhaust turbine with a variable turbine geometry for a variable adjustment of an effective turbine cross section and with a boost-air compressor, different operating states of the engine are assigned different characteristic maps with engine-operating and/or engine-state variables and the turbine geometry is adjusted in accordance with the characteristic maps between an open position and a pressure build-up position. When there is a change in a significant engine parameter, the system switches between two characteristic maps. In order to optimize an operating behaviour of the engine over all load and engine-speed ranges, a load gradient and/or an engine-speed gradient is determined as the engine parameter for the purpose of identifying a steady-state operation or a nonsteady-state operation of the engine, and the steady-state operation and the nonsteady-state operation of the engine are each assigned a characteristic map assigned to the steady-state operation being configured for a lower boost pressure and an optimum consumption and the characteristic map assigned to the nonsteady-state operation being configured for a higher boost pressure and an optimum dynamic response.
|
