Internal combustion engine

摘要

An internal combustion engine is disclosed which includes an induction passage divided into first and second intake passages leading to first and second groups of cylinders, respectively. The second intake passage has at its entrance a stop valve which closes to disconnect the second group of cylinders from the induction passage when the engine load is below a predetermined value. Main fuel supply means supplies a controlled amount of fuel into the induction passage. Auxiliary fuel supply means is provided for supplying a predetermined amount of fuel into the second intake passage downstream of the stop valve for a predetermined period of time after the engine load exceeds the predetermined value.