EXHAUSTER OF MULTI-CYLINDER ENGINE WITH SUPERCHARGER

摘要

PURPOSE:To reconcile performance at both high and low speeds by providing a communicating path to communicate exhausting paths individually arranged at every cylinder group and controlling the opening and shutting of the communicating path. CONSTITUTION:A valve device 9 closes a communicating path 8 at slow revolution and under light load. A firing order can therefore prevent an exhaust interference between adjacent cylinders to make the pulse wave of exhaust gas effectively act on a turbine 6. A valve device 9 communicates the communicating path 8 at quick revolution and under heavy load to lead an exhaust gas flowing through the first exhaust mainfold 2a into the second exhaust mainfold 2b too. Consequently the exhaust resistance is reduced at quick revolution and under heavy load, therefore an output is improved.