| 摘要 |
A cylinder of an internal combustion engine is provided with a turbo-side exhaust valve that opens and closes an exhaust port that communicates with a turbo-side exhaust passageway that leads to a turbine inlet opening of a turbo-supercharger, a bypass-side exhaust valve that opens and closes an exhaust port that communicates with a bypass-side exhaust passageway that bypasses the turbine, a first intake valve disposed opposite to the turbo-side exhaust valve, and a second intake valve disposed opposite to the bypass-side exhaust valve. At the time of engine startup and/or the time of low engine load, the turbo-side exhaust valve and the first intake valve are sto ed in the closed state. |
