| 摘要 |
An internal combustion engine is disclosed which includes active cylinders being always active and inactive cylinders being inactive when the engine is below a predetermined value. The engine has an exhaust passage divided by a partition into first and second branches leading from the active and inactive cylinders. The second branch is connected through an EGR passage with the inactive cylinders at low load conditions. An exhaust gas sensor is provided in a through-hole formed in the partition at a position downstream of the opening of the EGR passage for monitoring one content of the engine exhaust to provide a signal indicative of the air/fuel ratio. The second branch has a volume, upstream of the opening of the EGR passage, larger than the stroke volume of the inactive cylinders. |
