Exhaust turbocharger for integral attachment to vehicle engines

In addition to the primary purpose of feeding a greater mass of air or power potential to the engine, the aim of this type of exhaust turbocharger and its relevant arrangement is to virtually abolish the unwanted and often critical interval between the power demand (acceleration) and the effective acceleration; in addition, higher supercharging levels in injection combustion processes permit a reduction of the smoke emissions, in that the full power output curve is defined at a greater distance than normal from the smoke limit, as a compromise with respect to the full utilisation of potential. Integral attachment means that the exhaust and intake pipes, which are integral parts of any engine, are replaced by exhaust turbines with exhaust and charge-air lines. This assumes that the exhaust and inlet ports in the engine cylinder head lie on the same side of the engine and in the case of an even number of cylinders the valves in the cylinder head are each arranged laterally inverted in relation to the adjacent cylinder, in order to obtain symmetrical port fittings. Furthermore it is essential that the exhaust turbocharger be arranged in the plane of symmetry with vertical axis. These prerequisites and the need for a compact unit necessitate: a) incorporation into the unit of the exhaust bypass valve and its charging pressure-dependent control device; b) a maintenance-free and lubricating oil-free of the rotor; c) alternatively: a device, combined with the diffusor area of the compressor, for partial recooling ... Original abstract incomplete.