| 摘要 |
In a direct injection engine capable of reducing an amount of NOx discharged as much as possible, realizing EGR in a large amount, and enlarging a stable burning limit, fuel injection valves for directly injecting fuel into combustion chambers are arranged, ignition plugs are provided in the combustion chambers to face the same, intake ports for generating a tumble gas flow in the combustion chambers are provided. The intake ports are compartmented by partitions into high velocity port portions having a high flow velocity of intake air and low velocity port portions having a low flow velocity of intake air, passage valves for opening and closing the port portions are arranged near upstream ends of the low velocity port portions, and an EGR passage for introducing an EGR gas is connected to the low velocity port portions.
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