A pressure wave supercharger for compressing fresh air for an internal combustion engine, comprising a cold gas housing, a hot gas housing, and a rotor casing which is arranged therebetween and inside which a rotatable cell rotor is disposed; the hot gas housing comprises a high-pressure exhaust gas duct and a low-pressure exhaust gas duct, while the cold gas housing comprises a fresh air duct and a charge air duct; the high-pressure exhaust gas duct, the low-pressure exhaust gas duct, the fresh air duct and the charge air duct are fluidically connected to the cell rotor; the cold gas housing comprises a cell rotor bearing, the cell rotor is connected to a rotor shaft that is mounted in the cell rotor bearing, and the cell rotor is split in the direction in which the rotor shaft extends and comprises at least one first cell rotor part and a second cell rotor part.

A pressure wave supercharger for compressing fresh air for an internal combustion engine, comprising a cold gas housing, a hot gas housing, and a rotor casing which is arranged therebetween and inside which a rotatable cell rotor is disposed; the hot gas housing comprises a high-pressure exhaust gas duct and a low-pressure exhaust gas duct, while the cold gas housing comprises a fresh air duct and a charge air duct; the high-pressure exhaust gas duct, the low-pressure exhaust gas duct, the fresh air duct and the charge air duct are fluidically connected to the cell rotor; the cold gas housing comprises a cell rotor bearing, the cell rotor is connected to a rotor shaft that is mounted in the cell rotor bearing, and the cell rotor is split in the direction in which the rotor shaft extends and comprises at least one first cell rotor part and a second cell rotor part.

An apparatus having a plurality of pressure exchangers. Each pressure exchanger includes a first conduit and a second conduit and is operable for pressurizing a low-pressure dirty fluid via a high-pressure clean fluid. Each first conduit conveys the high-pressure clean fluid into a corresponding one of the pressure exchangers and to an adjacent one of the pressure exchangers, and each second conduit conveys a pressurized dirty fluid out of a corresponding one of the pressure exchangers and from the adjacent one of the pressure exchangers. The first conduits collectively form at least a portion of a high-pressure clean fluid manifold distributing the high-pressure clean fluid among the pressure exchangers, and the second conduits collectively form at least a portion of a pressurized dirty fluid manifold combining pressurized dirty fluid collectively discharged from the pressure exchangers.

A method to process exhaust gas expelled from at least one cylinder of a plurality of cylinders of an internal combustion engine, the method comprising providing an internal combustion engine, wherein the engine comprises a steam hydrocarbon reformer including a steam reformation catalyst, treating exhaust gas of the engine containing hydrocarbon and water by reacting the hydrocarbon and water in the presence of the steam reformation catalyst in the steam hydrocarbon reformer to provide treated exhaust gas. The treated exhaust gas includes carbon monoxide gas and hydrogen gas produced from the reaction, and mixing the treated exhaust gas, including the carbon monoxide gas and hydrogen gas produced in the steam hydrocarbon reformer with air to provide the mixture of air and treated exhaust gas introduced into the cylinders of the engine.

A method to process exhaust gas expelled from at least one cylinder of a plurality of cylinders of an internal combustion engine, the method comprising providing an internal combustion engine, wherein the engine comprises a steam hydrocarbon reformer including a steam reformation catalyst, treating exhaust gas of the engine containing hydrocarbon and water by reacting the hydrocarbon and water in the presence of the steam reformation catalyst in the steam hydrocarbon reformer to provide treated exhaust gas. The treated exhaust gas includes carbon monoxide gas and hydrogen gas produced from the reaction, and mixing the treated exhaust gas, including the carbon monoxide gas and hydrogen gas produced in the steam hydrocarbon reformer with air to provide the mixture of air and treated exhaust gas introduced into the cylinders of the engine.

The invention relates to a method and to a device for adjusting a charging pressure in an internal combustion engine by means of a pressure-wave supercharger, wherein the pressure-wave supercharger has a cell rotor, which passes through at least two compression cycles per revolution, wherein a high-pressure exhaust-gas flow is divided into a first and a second high-pressure exhaust-gas partial flow, wherein a fresh-air flow and the first high-pressure exhaust-gas partial flow are fed to the cell rotor and a first compressed fresh-air flow and a low-pressure exhaust-gas flow are led away from the cell rotor in the first compression cycle, and wherein the fresh-air flow and the second high-pressure exhaust-gas partial flow are fed to the cell rotor and a second compressed fresh-air flow and the low-pressure exhaust-gas flow are led away from the cell rotor in the second compression cycle, wherein the first and the second compressed fresh-air flow are combined into a charge air, and wherein the charge air is fed to the internal combustion engine, wherein the second high-pressure exhaust-gas partial flow is controlled in order to control the charging pressure of the charge air in such a way, and wherein the second compressed fresh-air flow is led through a check valve before the first and the second compressed fresh-air flow are combined into the charge air.

The invention relates to a method and to a device for adjusting a charging pressure in an internal combustion engine by means of a pressure-wave supercharger, wherein the pressure-wave supercharger has a cell rotor, which passes through at least two compression cycles per revolution, wherein a high-pressure exhaust-gas flow is divided into a first and a second high-pressure exhaust-gas partial flow, wherein a fresh-air flow and the first high-pressure exhaust-gas partial flow are fed to the cell rotor and a first compressed fresh-air flow and a low-pressure exhaust-gas flow are led away from the cell rotor in the first compression cycle, and wherein the fresh-air flow and the second high-pressure exhaust-gas partial flow are fed to the cell rotor and a second compressed fresh-air flow and the low-pressure exhaust-gas flow are led away from the cell rotor in the second compression cycle, wherein the first and the second compressed fresh-air flow are combined into a charge air, and wherein the charge air is fed to the internal combustion engine, wherein the second high-pressure exhaust-gas partial flow is controlled in order to control the charging pressure of the charge air in such a way, and wherein the second compressed fresh-air flow is led through a check valve before the first and the second compressed fresh-air flow are combined into the charge air.

A cell wheel of a pressure wave supercharger includes an outer sleeve, an inner sleeve, and an axle having a center line around which the inner sleeve and the outer sleeve are coaxially arranged. The cell wheel further includes blades that extend around the outside diameter of the inner sleeve and that are arranged between the inner sleeve and the outer sleeve and end discs arranged at ends in the inner sleeve and connected rigidly to the axle in a circumferential direction. The end discs are designed as separate parts and are connected rigidly to the inner sleeve in the circumferential direction. The end discs and the inner sleeve are configured to be moved relative to one another in a radial direction.

A cell wheel of a pressure wave supercharger includes an outer sleeve, an inner sleeve, and an axle having a center line around which the inner sleeve and the outer sleeve are coaxially arranged. The cell wheel further includes blades that extend around the outside diameter of the inner sleeve and that are arranged between the inner sleeve and the outer sleeve and end discs arranged at ends in the inner sleeve and connected rigidly to the axle in a circumferential direction. The end discs are designed as separate parts and are connected rigidly to the inner sleeve in the circumferential direction. The end discs and the inner sleeve are configured to be moved relative to one another in a radial direction.

A supercharger for an internal combustion engine includes a supercharger chamber, a diaphragm, an inlet valve, an outlet valve, an exhaust gas line, and an actuator. The diaphragm is positioned in the supercharger chamber and divides the supercharger chamber into an intake chamber and an exhaust gas chamber. The inlet valve and outlet valve are positioned on the intake chamber. The exhaust gas chamber is connected to the exhaust gas line, and to the actuator. The actuator is electrically actuatable, is connected to the diaphragm, and is configured to change a resonance frequency of the diaphragm.