An exhaust gas turbine (30) for expanding exhaust gas, comprising a turbine housing (33) having an inflow housing portion (35) for exhaust gas to be expanded and an outflow housing portion (36) for expanded exhaust gas, a turbine rotor (34) received by the turbine housing (33), the turbine rotor (34) being rotatable about an axis of rotation, a metering means (42) for a reducing agent or a precursor substance of a reducing agent, wherein the reducing agent or the precursor substance can be introduced into the expanded exhaust gas via the metering device (42), and with a swirl atomizer (43), rotating together with the turbine rotor (34), for the reducing agent or the precursor substance, the reducing agent or the precursor substance being atomizable in the expanded exhaust gas via the swirl atomizer (43), the swirl atomizer (43) engaging the turbine rotor (34) at a downstream, hub-side portion of the turbine rotor (34). Downstream of the turbine rotor (34) in extension of the axis of rotation of the turbine rotor (34), an impingement body (44) is arranged for the reducing agent or the precursor substance introduced into the exhaust gas and atomized, wherein a distance of the impingement body (44) from the swirl atomizer (43) corresponds to at most 7 times a diameter of the turbine rotor (34).

A compound engine assembly including an air conduit having an inlet in fluid communication with ambient air around the compound engine assembly, a compressor having an inlet in fluid communication with the air conduit, an engine core including at least one rotary internal combustion engine and having an inlet in fluid communication with an outlet of the compressor, a turbine section having an inlet in fluid communication with an outlet of the engine core and configured to compound power with the engine core; and at least one heat exchanger in fluid communication with the air conduit, each heat exchanger configured to circulate a fluid of the engine assembly in heat exchange relationship with an airflow from the air conduit circulating therethrough. A method of supplying air to a compound engine assembly is also discussed.

A compound engine assembly including an air conduit having an inlet in fluid communication with ambient air around the compound engine assembly, a compressor having an inlet in fluid communication with the air conduit, an engine core including at least one rotary internal combustion engine and having an inlet in fluid communication with an outlet of the compressor, a turbine section having an inlet in fluid communication with an outlet of the engine core and configured to compound power with the engine core; and at least one heat exchanger in fluid communication with the air conduit, each heat exchanger configured to circulate a fluid of the engine assembly in heat exchange relationship with an airflow from the air conduit circulating therethrough. A method of supplying air to a compound engine assembly is also discussed.

The invention relates to a method for a vehicle system (100) comprising an internal combustion engine (10) having a turbocharger unit (110) connected thereto, a turbocompound unit (120) arranged to receive exhaust gas flowing from the turbocharger unit (110), and an exhaust gas recirculation system (130). The method comprises controlling the exhaust gas flowing through the exhaust gas recirculation system (130) by determining a pressure difference, and, if the determined pressure difference is above a predetermined threshold value directing the recirculated exhaust gas to an air intake line (160) downstream a charge air cooler (170), and, if the determined pressure difference is not above the predetermined threshold value directing the recirculated exhaust gas to a compressor (114) of the turbocharger unit (110).

An internal combustion engine has a plurality of engine units, each having a working space, in which two rotary pistons are arranged so as mesh with each other and thereby divide the working space into an inflow region and an outflow region. Each engine unit has a closable inlet opening to the inflow region and a closable exhaust gas outlet opening. The internal combustion engine further includes a feed-line pipe to the inlet openings and an exhaust gas collection pipe connected to the exhaust gas outlet openings, so that the engine units are connected in parallel with each other. The internal combustion engine further includes exhaust gas lines which connect the engine units with each other in series. In certain cases, a control device operates some of the engine units either as internal combustion engines, or as expansion engines.

An improved turbocompound system, in particular in the field of industrial vehicles. A first turbine drives a fresh air compressor. A power turbine is arranged downstream of the first turbine and operatively coupled with the crankshaft of the engine through a clutch. A first electric motor/generator is operatively coupled with the turbocharger system. A second electric motor/generator is operatively coupled with the power turbine. The first and second electric motor/generators are electrically interconnected, and controlled as a motor or a generator in an opposite way with respect to each other, so that the electric energy produced by one is consumed by the other and vice versa.

An improved turbocompound system, in particular in the field of industrial vehicles. A first turbine drives a fresh air compressor. A power turbine is arranged downstream of the first turbine and operatively coupled with the crankshaft of the engine through a clutch. A first electric motor/generator is operatively coupled with the turbocharger system. A second electric motor/generator is operatively coupled with the power turbine. The first and second electric motor/generators are electrically interconnected, and controlled as a motor or a generator in an opposite way with respect to each other, so that the electric energy produced by one is consumed by the other and vice versa.

The present disclosure relates to an arrangement of auxiliary assemblies in a combustion machine including an electric machine which is operable as a generator and preferably also as a motor. The arrangement further includes an expansion machine, in particular an expansion machine of a waste heat recovery system for converting waste heat of the combustion machine or of an engine braking system into utilizable energy by way of a steam circuit, and a first group of auxiliary assemblies, including a water pump, a fuel predelivery pump, a high-pressure fuel pump, a steering assistance pump and an oil pump.

The present disclosure relates to an auxiliary drive of a combustion machine, in particular of a combustion machine of a utility vehicle. The auxiliary drive includes a shaft which is operatively connected to a crankshaft of the combustion machine and which has two shaft ends which are designed in each case for connection to a power-outputting and/or power-receiving machine arranged outside the crankcase.

A turbocompound unit for converting energy of an exhaust gas from an internal combustion engine to torque increase of a crankshaft of the internal combustion engine includes a turbine arrangement and an arrangement configured to operatively connecting the turbine arrangement to the crankshaft is a hydrodynamic coupling and freewheeling arrangement. The turbocompound unit further includes a brake arrangement, wherein the brake arrangement and the freewheeling arrangement are located on an opposite side of the hydrodynamic coupling in relation to the turbine arrangement.