An engine system for a motor vehicle is provided. The engine system includes a first exhaust-gas turbine in a first turbocharger driven by exhaust gas from the engine, a second exhaust-gas turbine in a second turbocharger driven by exhaust gas from the engine, a bypass coupled upstream and downstream of the first exhaust-gas turbine, and a pneumatic charge pressure control device including a bypass valve positioned in the bypass and a charge pressure control valve pneumatically coupled to the bypass valve and an intake line downstream of a first compressor included in the first turbocharger, the pneumatic charge pressure control device further including an adaptation unit pneumatically coupled to the bypass valve and an exhaust line upstream of the second exhaust-gas turbine.

Embodiments for operating an engine having parallel turbochargers and two fluidically coupleable, separated intake manifolds is provided. In one example, a method includes responsive to a first condition, operating a first cylinder group of an engine, deactivating a second cylinder group of the engine, and blocking fluidic communication between a first intake manifold coupled to the first cylinder group and a second intake manifold coupled to the second cylinder group, and responsive to a second condition, activating the second cylinder group and establishing fluidic communication between the first and second intake manifolds.

Methods and systems are provided for controlling a power output of a power source using a fluidic variable turbine turbocharger. In one example, a turbocharger system coupled to the power source includes a first turbocharger having a first compressor and a first turbine, and a second turbocharger having a second compressor and a second turbine, where boost air from the second compressor is directed to only a nozzle of the first turbine.

Methods and systems are provided for controlling a power output of a power source using a fluidic variable turbine turbocharger. In one example, a turbocharger system coupled to the power source includes a first turbocharger having a first compressor and a first turbine, and a second turbocharger having a second compressor and a second turbine, where boost air from the second compressor is directed to only a nozzle of the first turbine.

Disclosed is an air supply system (100) for supplying air to an outside of a hull (201) of a vessel (200). The vessel comprises an engine. The air supply system comprises one or more turbocharger(s) (10) for supplying a compressed main air flow to the engine of the vessel via a respective first flow path (11A). The air supply system comprises an exhaust gas recirculation (EGR) system for recirculating exhaust gas into the compressed main airflow supplied to the engine via a second flow path (11B). The air supply system comprises a third flow path (11C) for supplying a sub-flow of compressed air to one or more Air Discharge Units (ADUs). The EGR system comprises a blower (31) arranged in the second flow path (11B) for supplying exhaust gas to the engine. The first flow path and the second flow path have a first connecting path (11AB) upstream of the blower (31) and a second connecting path (11BA) downstream of the blower. The third flow path is in fluid connection with the first flow path and the second flow path downstream of the blower, such that the sub-flow of compressed air can be extracted from the first flow path and/or the second flow path.

A method for controlling and engine system with a plurality of turbochargers. At least one of the plurality of turbochargers has a turbine valve, a compressor valve, and actuators operable to change the position of the turbine valve. The method comprises controlling the actuator based on the presence of a transient event or a steady state event. During a transient event an engine control module can control the actuators to change the turbine valve to opened and closed positions and the turbine valve to a closed position based on the comparison between a corrected mass flow per turbocharger to a mass flow threshold.

An internal combustion engine includes an inline turbocharger and at least a first inline turbocharger that has a first turbine air valve, and a first inline compressor that has a first compressor air valve. A control valve is responsive to commands from an electronic controller to move the air valves between open and closed positions. The electronic controller monitors operating parameters of the engine to diagnose a fault. determine whether an air valve is stuck open or closed, and adjust a priority schedule for activating or deactivating the first inline turbocharger based on the type of fault.

A turbine housing includes: a housing body which includes a turbine housing part housing a turbine wheel, an inlet section forming an inlet flow passage for guiding exhaust gas to the turbine housing part, an outlet section forming an outlet flow passage for discharging the exhaust gas from the turbine housing part, and a waste-gate flow passage which brings the inlet flow passage and the outlet flow passage into communication so as to bypass the turbine housing part; and a sleeve disposed along an inner wall surface of the housing body forming the waste gate flow passage, at least on a downstream side of the waste-gate flow passage of the housing body with respect to a flow direction of the exhaust gas.

A recirculation system for a power system is disclosed. The recirculation system may determine, according to a sequence for individually activating a plurality of turbochargers of an engine, that a designated turbocharger of the plurality of turbochargers is to be activated. The recirculation system may cause a recirculation valve of a recirculation line to open to increase an airflow between an intake manifold and a compressor of the designated turbocharger.

A method for controlling and engine system with a plurality of turbochargers. At least one of the plurality of turbochargers has a turbine valve, a compressor valve, and actuators operable to change the position of the turbine valve. The method comprises controlling the actuator based on the presence of a transient event or a steady state event. During a transient event an engine control module can control the actuators to change the turbine valve to opened and closed positions and the turbine valve to a closed position based on the comparison between a corrected mass flow per turbocharger to a mass flow threshold.