A valve device increases or decreases a flow rate of EGR gas. The valve device includes a housing, a bypass valve body, and an EGR valve body. The housing includes a first upstream passage into which the EGR gas cooled by an EGR cooler flows, a second upstream passage into which the EGR gas that bypasses the EGR cooler flows, and a downstream passage connected to the first upstream passage and the second upstream passage, and provided downstream with respect to the first upstream passage and the second upstream passage. The bypass valve body opens and closes the second upstream passage. The EGR valve body is provided in the downstream passage and rotates around an EGR valve axis to open and close the downstream passage.

An internal combustion engine having a turbocharger with variability at the compressor inlet, and a turbocharger. An internal combustion engine having a turbocharger, and a turbocharger, are described. A device which both performs a change in the cross section of the compressor inlet and brings about an adjustment of the exhaust gas recirculation rate is arranged in the region of the compressor inlet. As a result, the turbocharger is of space-saving and low-cost construction in the compressor inlet region.

Methods and systems are provided for split exhaust engine system including a blowdown exhaust manifold coupled to an exhaust passage and a scavenge exhaust manifold coupled to an intake passage. In one example, a turbine wastegate couples a single exhaust runner out of a plurality of exhaust runners of the blowdown exhaust manifold to an exhaust passage, downstream of a turbocharger turbine. Additionally, the turbine wastegate may couple the single exhaust runner to the exhaust passage, downstream of the turbocharger turbine arranged in the exhaust passage.

Methods and systems are provided for split exhaust engine system including a blowdown exhaust manifold coupled to an exhaust passage and a scavenge exhaust manifold coupled to an intake passage. In one example, a turbine wastegate couples a single exhaust runner out of a plurality of exhaust runners of the blowdown exhaust manifold to an exhaust passage, downstream of a turbocharger turbine. Additionally, the turbine wastegate may couple the single exhaust runner to the exhaust passage, downstream of the turbocharger turbine arranged in the exhaust passage.

An internal combustion engine having a turbocharger with variability at the compressor inlet, and a turbocharger. An internal combustion engine having a turbocharger, and a turbocharger, are described. A device which both performs a change in the cross section of the compressor inlet and brings about an adjustment of the exhaust gas recirculation rate is arranged in the region of the compressor inlet. As a result, the turbocharger is of space-saving and low-cost construction in the compressor inlet region.

A system and method for co-production of hydrogen and electrical power includes operating an engine having an electrical power generator connected thereto, and a hydrogen gas production plant, from a single source of gaseous fuel such that hydrogen extracted from a heated reformate provided by a partial oxidation catalyst is removed and collected for storage or sale while a tail gas is recirculated to an engine inlet to reduce NOx emissions during engine operation.

A system and method for co-production of hydrogen and electrical power includes operating an engine having an electrical power generator connected thereto, and a hydrogen gas production plant, from a single source of gaseous fuel such that hydrogen extracted from a heated reformate provided by a partial oxidation catalyst is removed and collected for storage or sale while a tail gas is recirculated to an engine inlet to reduce NOx emissions during engine operation.

This EGR system is applied to a vehicle including an exhaust purification device capable of purifying NOx, and is provided with: an EGR passageway; a flow volume modification mechanism; and a control device which, when the NOx concentration in exhaust discharged from the exhaust purification device is greater than a reference value, starts to perform a control process for controlling the flow volume modification mechanism so that the ratio of the flow volume of a first exhaust that flows into a tail pipe decreases and the ratio of the flow volume of a second exhaust that flows into the EGR passageway increases, and makes the ratio of the flow volume of the second exhaust greater than the ratio of the flow volume of the first exhaust during the control process.

This EGR system is applied to a vehicle including an exhaust purification device capable of purifying NOx, and is provided with: an EGR passageway; a flow volume modification mechanism; and a control device which, when the NOx concentration in exhaust discharged from the exhaust purification device is greater than a reference value, starts to perform a control process for controlling the flow volume modification mechanism so that the ratio of the flow volume of a first exhaust that flows into a tail pipe decreases and the ratio of the flow volume of a second exhaust that flows into the EGR passageway increases, and makes the ratio of the flow volume of the second exhaust greater than the ratio of the flow volume of the first exhaust during the control process.

A product may include a bearing housing in which a shaft may be supported by a bearing so that it may rotate. A compressor wheel may be disposed on the shaft. A compressor cover may be connected with the bearing housing, which may form a compressor body and may define a chamber within which the compressor wheel may rotate. A diffuser may extend radially outward from the chamber and may receive gas from the compressor wheel. An inlet may be provided to the compressor body, which may receive a supply of exhaust gas. An EGR distribution cavity may be defined within the compressor body and may extend around the shaft. An EGR inlet channel may extend into the bearing housing from the inlet to the EGR distribution cavity. An EGR passage may extend from the EGR distribution cavity to the diffuser.