Abstract: The invention concerns an engine assembly (1) comprising a turbocharged engine with at least one cylinder having first and second outlet passages, the first passage being connected to a first manifold (5) while the second passage is connected to a second manifold (7) of an exhaust system comprising a first duct (4) extending from the first manifold (5) and a second duct (6) extending from the second manifold (7). The turbine (2) is provided with a wheel housed in a main pressure-relieving passage, the first duct (4) opening into the main passage. The first outlet passage is provided with means (20) for actively closing during the exhaust phase of the engine and the second duct (6) opens into at least one internal branching portion (8) of the turbine (2), bypassing the main pressure-relieving passage.

Abstract: The invention relates to an engine assembly (1) comprising a turbine (2) and an exhaust system removing the gasses from the engine and comprising a first pipe (4) leading from a first manifold (5) and a second discharge pipe (6) leading from a second manifold (7), the turbine (2) comprising a casing (2c) surrounding it and an energy-recovering impeller, the first pipe (4) opening into a main expansion passage housing the impeller. The second pipe (6) opens into at least one bypass portion (8) internal to the casing (2c) and bypassing the main expansion passage, the main expansion passage and said at least one bypass portion (8) meeting at an outlet face (2b) of the casing (2c), the main expansion passage comprising, inside the turbine (2), a valve for regulating the flow of exhaust gas passing through it.