Control system for engine equipped with variable nozzle type turbo supercharger (VNT) and exhaust gas recirculation (EGR) apparatus, prioritizes opening control of EGR control valve over that of variable nozzle during opening fluctuation

摘要

When opening fluctuation occurs in a variable nozzle (33) and/or an EGR control valve (42), opening control of the EGR control valve is prioritized over opening control of the variable nozzle to a target intake pressure. The EGR control valve regulates the EGR rate to a target rate with respect to the engine operational status.