| 摘要 |
PURPOSE:To raise the supercharging efficiency of a multi-cylinder engine having two turbochargers arranged in parallel to each other, by dividing a plurality of cylnders into two groups such that the sequence of ignition of the cylinders in each group is not continuous, and providing a supercharger for each of the cylinder groups. CONSTITUTION:In a four-cylinder engine, for instance, in which the sequence of ignition of cylinders 2A-2D is 2A-2C-2D-2B, the cylinders 2A-2D are divided into a first cylinder group 11 consisting of the cylinders 2A, 2D and a second cylinder group 12 consisting of the cylinders 2B, 2C such that the sequence of ignition of the cylinders in each of the two cylinder groups is not continuous. Further, the exhaust passage is constituted by a first exhaust passage 6A joining branch exhaust passages 6A1, 6A2 for the cylinders 2A, 2D and a second exhaust passage 6B joining branch exhaust passages 6B1, 6B2 for the cylinders 2B, 2C. Similarly, the intake passage is also constituted by a first intake passage 5A communicated with the first cylinder group 11 and a second intake passage 5B communicated with the second cylinder group 12. In such an arrangement, a first supercharger 7A and a second supercharger 7B are provided for the intake and exhaust passages 5A, 6A and 5B, 6B, respectively. |
