| 摘要 |
PURPOSE:To prevent the lower of the supercharge pressure by opening an exhaust cut valve and an intake cut valve in the high flow quantity area, and changing the switching term to delay the switching at the acceleration time so as to switch the second supercharger to the operated condition. CONSTITUTION:When an operated condition detecting means detects that an engine reaches the high flow quantity area, a switching control means opens an exhaust cut valve and an intake cut valve to operate the second supercharger. At this stage, a relief valve control means opens an intake relief valve to give the prerotation before the exhaust cut valve is opened. At the acceleration time, a switching term changing means switches when the switching is delayed and the rotation of the second supercharger is raised, that is, when the discharge side pressure is raised. Thereby, the lower of the supercharge pressure can be prevented when a turbosupercharger (the second supercharger) to be operated in the high flow quantity area (at the acceleration time) is switched to the operated condition. |
