| 摘要 |
In an internal combustion engine which can switch the number of cylinders in operation between the total number of cylinders and some of the cylinders, an EGR rate at a time of a transitional operation can be kept correct at a time of any of a full cylinder operation and a partial cylinder operation. A throttle is operated to an opening degree corresponding to an accelerator operating amount and the number of cylinders in operation so that outputs with respective to the accelerator operating amount become equal at the time of the full cylinder operation and at the time of the partial cylinder operation. When the opening degree of the throttle is changed due to change in the accelerator operating amount, the opening degree of the EGR valve is changed at a relatively high speed at the time of the full cylinder operation, and the opening degree of the EGR valve is changed at a relatively low speed at the time of the partial cylinder operation. The opening degree of the EGR valve is preferably changed at a speed corresponding to a change speed of pressure in a surge tank.
|
