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.

A rotor positioning system for rotary pressure exchangers with a rotor with a central bore accommodating an axle affixed to end covers in each end having at least one pair of high and low pressure ports in communication with opposing end cover ports through coaxial rotor ducts.

In a method for operating a combustion engine in which exhaust gas located in a cylinder during an outlet cycle thereof is ejected from the cylinder and supplied to an exhaust system, a particularly high specific power output of the combustion engine and/or a particularly low specific fuel consumption are to be made possible, in a particularly simple and reliable manner. For this purpose, according to the invention, in a first cycle phase of the outlet cycle the pulse of the exhaust gas pressure wave flowing out of the cylinder is transmitted in whole or in part to the primary side of an exhaust gas charge pump, before the exhaust gas is passed to the exhaust system in a second cycle phase of the outlet cycle.

In a method for operating a combustion engine in which exhaust gas located in a cylinder during an outlet cycle thereof is ejected from the cylinder and supplied to an exhaust system, a particularly high specific power output of the combustion engine and/or a particularly low specific fuel consumption are to be made possible, in a particularly simple and reliable manner. For this purpose, according to the invention, in a first cycle phase of the outlet cycle the pulse of the exhaust gas pressure wave flowing out of the cylinder is transmitted in whole or in part to the primary side of an exhaust gas charge pump, before the exhaust gas is passed to the exhaust system in a second cycle phase of the outlet cycle.

A membrane pump (1, 1, 1), in particular for use in the exhaust gas tract of a combustion engine (70), comprising a pressure housing (2), the internal volume (4) of which is subdivided by a number of resiliently deformable membranes (6) into a plurality of sub-volumes (8, 10) separated from one another on the gas side, wherein a biasing force is applied to the or each membrane (6) in such a way that in the pressure-free state the sub-volume (8) forming the primary side has a minimum value in relation to the deformability of the or each membrane (6), is to act so as particularly to increase effectiveness during use in the exhaust system of a combustion engine (70). For this purpose, according to the invention, a leaf spring (36) is provided as a restoring spring for applying the biasing force to the membrane (6).

A membrane pump (1, 1, 1), in particular for use in the exhaust gas tract of a combustion engine (70), comprising a pressure housing (2), the internal volume (4) of which is subdivided by a number of resiliently deformable membranes (6) into a plurality of sub-volumes (8, 10) separated from one another on the gas side, wherein a biasing force is applied to the or each membrane (6) in such a way that in the pressure-free state the sub-volume (8) forming the primary side has a minimum value in relation to the deformability of the or each membrane (6), is to act so as particularly to increase effectiveness during use in the exhaust system of a combustion engine (70). For this purpose, according to the invention, a leaf spring (36) is provided as a restoring spring for applying the biasing force to the membrane (6).

An internal combustion engine includes an intake conduit fluidically coupled to ambient fluid and having an internal cross-sectional area and an engine cylinder fluidically coupled to the intake conduit. A fluidic amplifier is disposed within the intake conduit and is fluidically coupled to the ambient fluid and engine cylinder. The amplifier is further fluidically coupled to a source of primary fluid and is configured to introduce the primary fluid and at least a portion of the ambient fluid to the engine cylinder.

An internal combustion engine includes an intake conduit fluidically coupled to ambient fluid and having an internal cross-sectional area and an engine cylinder fluidically coupled to the intake conduit. A fluidic amplifier is disposed within the intake conduit and is fluidically coupled to the ambient fluid and engine cylinder. The amplifier is further fluidically coupled to a source of primary fluid and is configured to introduce the primary fluid and at least a portion of the ambient fluid to the engine cylinder.

An enhanced pressure-wave supercharger for a combustion engine utilizes a superior pressure wave process cycle design. The design utilizes a select final portion of the compressed gas stream exiting the rotor, and supplies it to a subsequent inlet port ahead of and prior to the introduction into the rotor of the aspirated air to be compressed. Work is extracted within the rotor from this gas stream and transferred into rotational energy of the rotor through using a portion the available momentum of the compressed gas via incidence on the rotor webs to turn the rotor by means of conventional turbomachinery principles.

A pressure wave supercharger for compressing fresh air for an internal combustion engine comprises 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 hot gas housing comprises a first bearing, and the cold gas housing comprises a second bearing; the cell rotor comprises a rotor shaft that is mounted in the first and second bearings; and the hot gas housing comprises a heat exchanger which is designed in such a way that at least the first bearing can be cooled.