An exhaust gas recirculation (EGR) mixer for use in a power generation system is provided. The EGR mixer includes a mixing chamber defining a flow direction and a working fluid inlet coupled with the mixing chamber for introducing a working fluid into the mixing chamber along the flow direction. The EGR mixer also includes exhaust gas injection ducts extending across the mixing chamber downstream from the working fluid inlet. Each of the exhaust gas injection ducts is oriented to receive exhaust gases being recirculated within the power generation system and to inject the exhaust gases into the mixing chamber in a direction that intersects the flow direction to generate a turbulent flow within the mixing chamber. The EGR mixer also includes an outlet coupled with the mixing chamber for directing a mixture of the exhaust gases and the working fluid to a compressor within the power generation system.

An exhaust gas recirculation (EGR) mixer for use in a power generation system is provided. The EGR mixer includes a mixing chamber defining a flow direction and a working fluid inlet coupled with the mixing chamber for introducing a working fluid into the mixing chamber along the flow direction. The EGR mixer also includes exhaust gas injection ducts extending across the mixing chamber downstream from the working fluid inlet. Each of the exhaust gas injection ducts is oriented to receive exhaust gases being recirculated within the power generation system and to inject the exhaust gases into the mixing chamber in a direction that intersects the flow direction to generate a turbulent flow within the mixing chamber. The EGR mixer also includes an outlet coupled with the mixing chamber for directing a mixture of the exhaust gases and the working fluid to a compressor within the power generation system.

A gas engine heat pump and a method of operating the same are provided. According to an embodiment of the present disclosure, the gas engine heat pump includes: an engine for burning a mixture of air and fuel; an exhaust gas compressor for compressing exhaust gases coming from the engine; a buffer tank for storing the exhaust gases compressed by the exhaust gas compressor; an exhaust gas valve disposed between the buffer tank and an intake manifold of the engine; an exhaust gas spray nozzle for spraying the exhaust gases stored in the buffer tank into a cylinder of the engine; an exhaust gas sensor for acquiring information on the exhaust gases coming from the engine; and a controller, wherein the controller controls the operation of at least one of the exhaust gas valve and the exhaust gas spray nozzle, based on the information on the exhaust gases acquired by the exhaust gas sensor. Other various embodiments are possible.

Methods and systems are provided for a ducted fuel injector. In one example, the ducted fuel injector comprises a plurality of passages, with at least one of the passages configured to receive an oxygen poor gas from a reservoir or an adjacent cylinder to decrease a likelihood of pre-ignition in the duct.

An EGR device includes an inlet portion into which EGR gas is introduced, a first outlet portion, a second outlet portion, and a passage portion. The first outlet portion and the second outlet portion each conduct, to the corresponding branch passage portion, the EGR gas that has been introduced through the inlet portion. The passage portion allows gas to flow between the inlet portion and the first outlet portion and between the inlet portion and the second outlet portion. The passage portion includes: a main passage that connects the inlet portion to the first outlet portion and to the second outlet portion; and an expansion chamber that is expanded outward from the main passage. The main passage includes a connecting portion. The connecting portion is connected to the second outlet portion and extends in a first direction. The expansion chamber is expanded outward from the connecting portion.

An EGR gas distributor for distributing EGR gas to branch pipes of an intake manifold includes a plurality of gas distribution passages arranged side by side for the branch pipes, a gas inflow passage and a gas chamber to deliver the EGR gas to each of the gas distribution passages. The gas inflow passage includes two, first and second, gas passage parts branched in a single stage. When the EGR gas distributor is mounted on the intake manifold, a passage cross-section of each gas passage part perpendicular to a central axis has an uppermost vertex and a lowermost vertex. The passage cross-sections of the gas passage parts are sized such that their lengths in a vertical direction are gradually longer from an upstream side of the first gas passage part to a downstream side of the second gas passage part.

An EGR gas distributor for distributing EGR gas to branch pipes of an intake manifold includes a plurality of gas distribution passages arranged side by side for the branch pipes, a gas inflow passage and a gas chamber to deliver the EGR gas to each of the gas distribution passages. The gas inflow passage includes two, first and second, gas passage parts branched in a single stage. When the EGR gas distributor is mounted on the intake manifold, a passage cross-section of each gas passage part perpendicular to a central axis has an uppermost vertex and a lowermost vertex. The passage cross-sections of the gas passage parts are sized such that their lengths in a vertical direction are gradually longer from an upstream side of the first gas passage part to a downstream side of the second gas passage part.

A system includes an engine having a main combustion chamber and a prechamber containing a spark plug. The prechamber is in fluid communication with the main combustion chamber through at least one orifice. An engine intake line provides intake air to the engine. An engine exhaust line receives exhaust gases from the engine. An exhaust gas recirculation line transports a portion of the exhaust gases from the engine exhaust line to the engine intake line, forming an exhaust gas recirculation loop through the engine. The system includes a reformer having a reactor containing a catalyst-coated substrate. The reformer generates a gaseous reformate from a fuel. The system includes a prechamber feed line to transport a stream of the gaseous reformate from the reformer to the prechamber.

Provided is an intake manifold structure for an internal combustion engine including an intake manifold defining a plurality of branch passages (13) communicating with corresponding intake ports (6) of the internal combustion engine (1) arranged in a cylinder row direction thereof, and provided with additional gas introduction ports (29) communicating with the respective branch passages, and an additional gas introduction passage forming member (16) attached to the intake manifold, and defining an additional gas inlet (35) and additional gas introduction passages (14) communicating the additional gas inlet with the corresponding additional gas introduction ports, wherein the additional gas introduction passage forming member extends across the branch passages, and is provided with a guide wall (33) for defining the additional gas introduction passages in cooperation with an outer surface of the intake manifold and an inner surface of the additional gas introduction passage forming member.

Provided is an intake manifold structure for an internal combustion engine including an intake manifold defining a plurality of branch passages (13) communicating with corresponding intake ports (6) of the internal combustion engine (1) arranged in a cylinder row direction thereof, and provided with additional gas introduction ports (29) communicating with the respective branch passages, and an additional gas introduction passage forming member (16) attached to the intake manifold, and defining an additional gas inlet (35) and additional gas introduction passages (14) communicating the additional gas inlet with the corresponding additional gas introduction ports, wherein the additional gas introduction passage forming member extends across the branch passages, and is provided with a guide wall (33) for defining the additional gas introduction passages in cooperation with an outer surface of the intake manifold and an inner surface of the additional gas introduction passage forming member.