TURBO SUPERCHARGERS FOR INTERNAL COMBUSTION ENGINES

• US 3,844,676 A
• Filed: 04/13/1973
• Issued: 10/29/1974
• Est. Priority Date: 04/13/1972
• Status: Expired due to Term

• Current Assignee: John Francis Betteridge
• Original Assignee: John Francis Betteridge
• Inventors: Betteridge, John Francis
• Primary Examiner(s): Husar, C. J.
• Application Number:
  US05/351,026
• Time in Patent Office: 564 Days
• Field of Search: 415/147,148,151,156,159,165,203 417/407
• US Class Current: 415/156
• CPC Class Codes: F01D 17/146 by throttling the volute inlet of radial machines or engines

Abstract

A turbo super charger for an internal combustion engine includes a casing in which is formed a volute passage which diminishes in cross sectional area from an inlet and which has an opening of substantially constant width onto the periphery of the blades of a turbine. The passage accommodates a flexible band which is movable between inner and outer positions, the band supporting division members which in the inner position of the band divide the passage into two parts. The division members extend into the opening to maintain the streams of exhaust gas flowing in the two halves of the passage separated until they have inpinged upon the turbine blades.

Claims

1. A turbo supercharger for an internal combustion engine and of the kind comprising a radial inward flow turbine having a casing defining a pair of engine exhaust gas inlets disposed in side by side relationship, the casing also including a volute passage having a throat and an elongated aperture through which gases entering the inlets flow onto the peripHery of the turbine rotor, the supercharger also including a compressor which is driven by the turbine and which supplies air under pressure to the associated engine, and a flexible band disposed in said passage, said band extending from the end of the passage remote from said inlets towards the inlets, operating means coupled to the end of the band at said inlets whereby the band can be moved to reduce the cross sectional area of the passage throughout its length, arcuate division members mounted in end to end relationship on the band and which when the band is set to provide the minimum cross sectional area of passage co-operate with each other to divide said passage into two parts, each part of said passage being connected to to divide of said inlets and the division members acting todivide said aperture so that the streams of exhaust gas flowing into said inlets are maintained separated until the exhaust gas has impinged on the turbine rotor, the members when the band is moved to increase the cross sectional area of the passage separating to define spaces which place the two parts of the passage in communication with each other.

2. A turbo supercharger as claimed in claim 1 in which the end of the band remote from the inlets is secured at the outer periphery of the passage.

3. A turbo supercharger as claimed in claim 2 in which at its end adjacent the inlet the band mounts a division plate which when the band is in its contracted state extends into the inlet of the passage.