| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress a difference in a level of torque when switching a supercharging mode as much as possible. <P>SOLUTION: A supercharging state switching means switches a supercharging state by a first supercharger and a second supercharger between two-stage supercharging by the first supercharger and second supercharger and single-stage supercharging mainly by the second supercharger, by controlling operation of an exhaust control valve according to the operating condition of an internal combustion engine. An EGR control means sets an EGR valve into a fully closed state before the opening operation of the exhaust control valve for switching the supercharging state by the supercharging state switching means. Alternately, a variable nozzle opening adjustment means sets a variable nozzle provided in the exhaust inlet of the first supercharger into the fully closed state before the opening operation of the exhaust control valve for switching the supercharging state by the supercharging state switching means. <P>COPYRIGHT: (C)2011,JPO&INPIT |
