| 摘要 |
<p>A direct fuel injection type spark ignition internal combustion engine includes a piston/cylinder structure including a deep dish portion (2), a peripheral portion (3'), and a shallow dish portion (3). The peripheral portion (3') has a depth smaller than the deep dish portion (2) and greater than the shallow dish portion (3) and a diameter larger than the deep dish portion (2) and smaller than the shallow dish portion (3). At medium engine loads, fuel is injected toward an edge portion (4') defined between the deep dish portion (2) and the peripheral portion (3') and is divided by the edge portion (4') into two portions. One portion flows into the peripheral portion (3') and is evaporated to generate a moderately rich air-fuel mixture which helps to propagate flame from the deep dish portion (2) to the remaining portion of a combustion chamber including the shallow dish portion (3). <IMAGE></p> |
