Method of two-stage turbocharger matching for supporting cylinder deactivation.

摘要

A method of controlling an internal combustion engine, comprising a two-stage turbocharger, an exhaust gas recirculation (EGR) valve and a cylinder deactivation system, comprises setting a high pressure (HP) turbine 251, a HP turbine controlled by-pass 252, a low pressure (LP) turbine controlled by-pass 254 and the EGR valve to first or second values taking into account the exhaust flow in the HP and LP by-passes, the expansion ratio in the HP turbine and instantaneous engine speed and load. The HP turbine, the HP and LP by-passes and the EGR valve are also set according to preset values for boost and EGR targets ramp-in. The method may also comprise the step of realizing a cylinders activation or deactivation, as well as controlling the EGR and boost in closed loop. The method may be carried out using a suitable internal combustion engine and control apparatus.