Methods and systems are provided for an automatic branch communication valve. In one example, a method includes rotating the valve to a second position in response to a non-electrical actuation of the valve.

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.

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.

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.

A gas turbine system is disclosed having a pulsating gas flow from an internal combustion engine. The system according to the invention provides a reduction in the pressure and velocity of the gas flow in the gas turbine as well as an increase in its total mass which solves the problem for increasing the average weighted efficiency of the gas turbine of the gas turbine system with a pulsating gas stream from an internal combustion engine and the overall system efficiency.

A gas turbine system is disclosed having a pulsating gas flow from an internal combustion engine. The system according to the invention provides a reduction in the pressure and velocity of the gas flow in the gas turbine as well as an increase in its total mass which solves the problem for increasing the average weighted efficiency of the gas turbine of the gas turbine system with a pulsating gas stream from an internal combustion engine and the overall system efficiency.

A drive system may include an internal combustion engine and an expander operated via a working medium. A force transmission device may be disposed between a crankcase and the expander. A first seal may be disposed between the expander and the force transmission device and/or a second seal may be disposed between the force transmission device and the crankcase. A crankcase ventilation line may lead from the crankcase into an intake pipe of the internal combustion engine. An air mass sensor may be disposed in the intake pipe. An engine control unit may be in communication with the air mass sensor, the expander, and the internal combustion engine and may be configured to detect a power of the internal combustion engine and an air mass flow of the air mass sensor and may switch off the expander if a power suddenly rises with the air mass flow remaining constant.

A turbocharger system for a light or heavy duty vehicle, a maritime vehicle or a construction vehicle comprises a turbocharger device, an exhaust manifold conduit, a valve, a receptacle for compressed gas and a gas compressor for compressing gas. By opening the valve during a predetermined pulse duration time period, compressed gas may be provided from the receptacle to the exhaust manifold conduit for initial turbocharger compressor spin-up. The turbocharger system further comprises a cooling means configured to decrease temperature of compressed gas provided by the gas compressor, and a heating means configured to increase temperature of the gas pulse generated by opening of the valve. By decreasing the temperature of the compressed gas in the receptacle upstream of the valve and subsequently heating up the generated air pulse before being provided to the exhaust manifold conduit, the response time of the turbocharger device can be improved.

A turbocharger system for a light or heavy duty vehicle, a maritime vehicle or a construction vehicle comprises a turbocharger device, an exhaust manifold conduit, a valve, a receptacle for compressed gas and a gas compressor for compressing gas. By opening the valve during a predetermined pulse duration time period, compressed gas may be provided from the receptacle to the exhaust manifold conduit for initial turbocharger compressor spin-up. The turbocharger system further comprises a cooling means configured to decrease temperature of compressed gas provided by the gas compressor, and a heating means configured to increase temperature of the gas pulse generated by opening of the valve. By decreasing the temperature of the compressed gas in the receptacle upstream of the valve and subsequently heating up the generated air pulse before being provided to the exhaust manifold conduit, the response time of the turbocharger device can be improved.

A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.