Patent Number: 6,293,103

Title: Turbocharger system to inhibit reduced pressure in intake manifold

Abstract: An internal combustion engine is provided with at least one intake manifold and a turbocharger. The turbocharger includes a rotatable shaft; a turbine having a turbine wheel carried by the shaft; and a multi-stage compressor. The multi-stage compressor includes a first compressor wheel carried by the shaft, an axially extending first inlet associated with the first compressor wheel, a radially extending first outlet associated with the first compressor wheel, a second compressor wheel carried by the shaft, an axially extending second inlet associated with the second compressor wheel, a radially extending second outlet associated with the second compressor wheel, and an interstage duct fluidly interconnecting in series the first outlet associated with the first compressor wheel with the second inlet associated with the second compressor wheel. The second outlet is fluidly coupled with the intake manifold. One or more valves are each fluidly coupled with an ambient environment and the interstage duct or intake manifold. Each valve is adapted to open when a pressure of the ambient environment is less than a pressure within the interstage duct or intake manifold.

Inventors: Gladden; John R. (Lafayette, IN)

Assignee: Caterpillar Inc.

International Classification: F02B 33/44 (20060101); F04D 17/14 (20060101); F04D 17/00 (20060101); F02B 033/44 ()

Expiration Date: 09/25/2018