A method of generating electrical power includes expanding a flow of exhaust gas from a combustion process as the exhaust gas passes through a turbo-expander disposed on a turbo-crankshaft. The flow of exhaust gas from the turbo-expander is routed through a first flow path of an exhaust gas heat exchanger. The flow of exhaust gas from the first flow path is compressed as the exhaust gas passes through a turbo-compressor disposed on the turbo-crankshaft. The flow of exhaust gas from the turbo-compressor is routed through a second flow path of the exhaust gas heat exchanger. Heat from the first flow path is transferred to the second flow path to cool the exhaust gas in the first flow path and heat the exhaust gas in the second flow path. Electrical power is generated from a generator disposed on the turbo-crankshaft.

An exhaust component assembly for a vehicle exhaust system includes a housing defining an internal cavity configured to receive an exhaust gas after-treatment component. A first chamber is in fluid communication with the internal cavity upstream of the exhaust gas after-treatment component. A first nozzle introduces fluid into the first chamber and a first valve controls flow of the fluid from the first chamber into the internal cavity. A heat source is associated with the first nozzle or first chamber. A second chamber is in fluid communication with the internal cavity upstream of the exhaust gas after-treatment component, and the second chamber is a non-heated chamber. A second nozzle introduces fluid into the second chamber and a second valve controls flow of the fluid from the second chamber into the internal cavity. A controller controls the first and second valves based on at least one predetermined operating condition.

Proposed is a gas heat-pump system capable of supplying recirculation exhaust gas to an engine using an exhaust gas turbocharger and thus actively controlling an amount of the flowing recirculation exhaust gas and pressure thereof.

A heat exchange member includes: a honeycomb structure including: an outer peripheral wall; and partition walls arranged on an inner side of the outer peripheral wall, the partition walls defining a plurality of cells each extending from a first end face to a second end face to form a flow path for a first fluid; and a covering member being configured to cover an outer peripheral surface of the outer peripheral wall. In a cross section of the honeycomb structure orthogonal to a flow path direction for the first fluid, the partition walls include first partition walls extending in a radial direction and second partition walls extending in a circumferential direction. A part of at least one of the outer peripheral wall and the second partition walls includes at least one slit 30.

A method filtering exhaust gas may include attaching an exhaust tube to an engine at an exhaust gas inlet of the exhaust tube. The method may also include filling an outer tube of the exhaust tube with a liquid. The method may further include filtering the exhaust gas by passing the exhaust gas through an inner gas distributor disposed inside the outer tube, and through a plurality of holes of the inner gas distributor into the liquid of the outer tube. In addition, the method may include expelling filtered exhaust gas through an exhaust gas outlet of the exhaust tube.

An exhaust energy recovery system (EERS) and associated methods for an engine are disclosed. An embodiment of an EERS, for example, includes an inlet duct that is configured to divert exhaust gas from an exhaust duct of the engine into the recovery system and an outlet duct configured to return the exhaust gas to the exhaust duct downstream of the inlet duct. The recovery system is configured to heat components or fluids associated with engine to operating temperatures. The recovery system may be part of a mobile power system that is mounted to a single trailer and includes an engine and a power unit such as a high pressure pump or generator mounted to the trailer. Methods of operating and purging recovery systems are also disclosed.

A method of processing exhaust gas includes receiving incoming exhaust gas and cooling it in at least one heat exchanger to create cooled exhaust gas. The cooled exhaust gas is compressed in a compressor to liquefy CO.sub.2 leaving a remaining exhaust gas. The remaining exhaust gas is circulated through the heat exchanger to cool subsequent incoming exhaust gas and warm the remaining exhaust gas. At least a portion of the liquid CO.sub.2 may be pelletized in a pelletizer.

The present disclosure describes an arrangement for a motor vehicle including an internal combustion engine, a heat exchanger for cooling exhaust gas present in the internal combustion engine, and an exhaust system for discharging the exhaust gas. The heat exchanger has a channel system including at least one exhaust gas channel, through which an exhaust path leads, and at least one coolant channel, through which a coolant path of a coolant leads, fluidically separate from the exhaust gas path and arranged in a heat-transferring manner with the exhaust gas path for heat exchange during operation. A cooling gas outlet, opening into the exhaust gas path upstream of the channel system, is provided for introducing a cooling gas into the exhaust gas path upstream of the channel system.

A system and method for treating exhaust gas includes an exhaust gas discharge structure, a catalytic exhaust gas treatment device positioned at least partially within the exhaust gas discharge structure, a pump, and at least two heat exchangers. The catalytic exhaust gas treatment device is positioned at least partially within the exhaust gas discharge structure. A first heat exchanger is positioned at least partially within the exhaust gas discharge section and upstream of the catalytic exhaust gas treatment device to remove heat from an exhaust gas by transferring heat to a working fluid. A second heat exchanger removes heat from the working fluid gained at the first heat exchanger. The pump drives the working fluid between the first and second heat exchanger.

Provided is a heat exchange device 1 in which: a heat exchange path composed of a plurality of heat exchange branch paths ER1 and ER2 and a detour path DR are provided inside a base structure 2 having a fluid introducing portion 21 and a fluid discharging portion 22; a heat exchange portion 4 through which a heating target fluid is arranged in each of the heat exchange branch paths ER1 and ER2; and a switching portion is provided that can switch a flow of heated fluid circulating through the base structure 2 so as to be regulated to either the heat exchange path or the detour path DR. A heat exchange device having excellent heat exchange performance and capable of shortening the length and reducing the size is provided.