Abstract: A turbocharger having a by-pass system for selectively by-passing exhaust gases from the turbine rotor. The by-pass arrangement includes a housing portion having a by-pass passage which preferably extends from the exhaust inlet to the exhaust outlet. There is a port from the exhaust inlet into the by-pass passage which is selectively controlled by a pivoted valve. The turbocharger with the by-pass arrangement may be utilized with a conventional vehicle exhaust system of the type having a catalytic convertor and if so desired, a major portion of the by-pass gases may also by-pass the catalytic convertor. A control device disposed remote from the turbocharger permits the use of relatively inexpensive control elements.

Abstract: A fluid damped, non-rotating bearing construction for a high speed rotating shaft. A sleeve surrounds the shaft on which are mounted the impeller and compressor wheels, such as in a turbocharger. The sleeve is held against rotation and against significant axial movement by a longitudinally split, hollow metal pin. The sleeve functions as both a radial bearing and a thrust bearing.

Abstract: A bearing carrier for high speed rotating machinery, such as a turbocharger, wherein lubricant is supplied under pressure and is drained by gravity. The primary feature is the forming of the bearing housing with a very large drain chamber which is obstructed only by a lubricant supply boss supporting a central housing portion in which a sleeve bearing is resiliantly mounted. Lubricant exiting from the ends of the sleeve bearing is flung circumferentially away from the rotating components and drains naturally to a lower portion of the drain chamber where it flows through a drain passage port without re-entering the rotating components or piston ring seal area. The drain port is so positioned with respect to the lubricant drain chamber and there is provided a dam around the seal area at the axial end of the lubricant drain chamber whereby the machinery may be selectively positioned with the shaft horizontal, within 10.degree.

Abstract: A centrifugal compressor is described herein which comprises a bearing housing, an impeller rotatably mounted to the housing, and an integral compressor cover mounted upon the housing and including an impeller chamber within which the impeller is received. The compressor cover includes a wall portion which defines the impeller chamber and further includes a scroll portion defining a volute passageway surrounding the impeller chamber. The scroll portion includes a mounting flange having a cylindrical pilot surface secured to a mounting flange on the bearing housing. The cover further includes a ring-like flange extending outwardly from one end of the wall portion and forming with the mounting flanges of the scroll and bearing housing an annular, diffuser passageway communicating with the volute passageway and the impeller chamber. The diffuser flange extends radially outward of the pilot surface of the scroll, only the portion of the diffuser flange which is radially inward of the pilot surface being machined.