Cummins Engine Company, Inc.

Hans J Schlamadinger

Jerre F Lauterbach

A turbocharger for an internal combustion engine is provided having a turbine section responsive to the engine exhaust gas flow and a compressor section communicating with the engine intake manifold. A pressure responsive adjustable fuel pump is in communication with the engine combustion chambers. A wastegate unit with an adjustable valve disposed within a bypass passageway formed in the turbine section is provided for regulating the diverion of a predetermined amount of exhaust gas flow away from a turbine wheel within the section. The unit valve is biased to assume a closed position with respect to the bypass passageway. A multiport connection having an interior cavity is provided with a first port in pressure communication with the fuel pump; a second port in pressure communication with the intake manifold; and a third port in pressure communication with the wastegate unit. When pressure within the connection cavity is below a predetermined amount, the bias on the unit adjustable valve will close the secondary passageway and the fuel pump responsive to the reduced cavity pressure reduces the fuel flow to the engine and the speed of the turbocharger turbine wheel.

Turbocharged internal combustion engine

A turbocharger assembly including a flexible anti-friction bearing support to prevent loss of gripping interference at high temperatures and destructive compressive loads at low temperatures. A simplified hydrodynamic fluid (such as lubrication oil) supply is disclosed for providing lubricating oil to the anti-friction bearing and hydrodynamic fluid to a hydrodynamic sleeve bearing. A novel end plate design permits limited radial movement of the bearing support while resisting axial thrust loads of the turbo shaft.

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Columbus, IN, United States of America

Hans J Schlamadinger