Abstract: In the case of a gas-dynamic pressure-wave supercharger for the supercharging of an internal combustion engine, an exhaust bypass in the gas housing (2), with a medium-controlled gate, connects the high-pressure gas inflow duct (4) to the low-pressure gas outflow duct (6). The exhaust gas blown off is introduced via a waste gate ejector (33), which is located in the region of the closing edge (30) in the low-pressure gas outflow duct (6), into the latter. Consequently, the energy level of the low-energy scavenging air can be increased, which improves the compression efficiency of the pressure-wave supercharger.

Abstract: A method and apparatus wherein a diesel having an exhaust-gas passage, a particle filter at a location along the exhaust-gas passage and a bypass passage bypassing the particle filter is started with the bypass passage closed, is operated at idle and up to a predetermined partial load with the bypass passage open and is operated beyond the partial load with the bypass passage closed so as to reduce particulate emissions and to assure regeneration of the particle filter.

Abstract: A method and apparatus for regulating a bypass flow of a turbocharged internal combustion engine is disclosed. A first preferred embodiment of the apparatus includes an air receiver which is in fluid communication with a turbocharger and an air oscillation pipe. The air oscillation pipe is in fluid communication with an inlet manifold, which inlet manifold is in fluid communication with a bypass duct and the turbocharged engine. The bypass duct is in fluid communication with the turbocharger. Pressure pulsations emanating from the engine propagate into the inlet manifold and the air oscillation pipe causing an air column within the inlet manifold and air oscillation pipe to oscillate. Periodic oscillations of the air column produces periodic pressure differences across the bypass duct, facilitating a bypass flow of air through the bypass duct.

Abstract: A method for supercharging internal combustion engines with turbochargers wherein the engine is operated in the lowest load region as a naturally aspirated engine, and the waste gate, the inlet section of the turbine and all other exhaust gas ducts present are fully open. When this load range is exceeded, the flow area of the turbine inlet is reduced to its minimum operational value and subsequently, with a further increase in load, is increased again to its maximum value at full load. The engine operated according to this method has a varioturbocharger whose turbine inlet flow area is controlled by a throttle slide as a function of the fuel injection quantity and the boost pressure by means of an adjustment device and a control pressure modulator.

Abstract: An apparatus for improving the efficiency of a turbo-supercharger at low load levels is disclosed. The apparatus includes an annular gas inlet housing which encircles the turbine of the turbo-supercharger and which housing includes an inlet for gases flowing toward the turbine. Arranged within the housing is a diaphragm, an outer periphery of which diaphragm is connected to the housing. Connected to the inner periphery of the diaphragm is a guide vane ring. Biasing springs, arranged within the housing, urge the diaphragm, and thus the guide vane ring connected to the diaphragm, toward the inlet.