| 摘要 |
In a partial load range of the engine, control of the flowing state of sucked and discharged gas is executed between a pair of cylinders, an exhaust stroke of one of the cylinders overlapping with an intake stroke of the other, so that burnt gas discharged from preceding cylinders 2 A, 2 D on the exhaust-stroke side is introduced, in a state where it has been discharged, through an inter-cylindrical gas passage 22 into following cylinders 2 B, 2 C on the intake stroke side. In a higher load range than the partial load range, control is executed so that a fresh-air introducing valve 18 disposed in a fresh-air introduction passage of the following cylinders 2 B, 2 C is opened, both the burnt gas and fresh air are introduced into the following cylinders 2 B, 2 C, and fuel is supplied to conduct combustion in the following cylinders 2 B, 2 C.
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