US3734650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust-gas driven turbochargers
Assignee: Howden Turbo GmbH
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Filing: 1971-04-30
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Granted: 1973-05-22
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Expires: 1991-04-30
Abstract
Abstract A exhaust gas tubocharger for use in connection with internal combustion engines has a turbine wheel and a compressor wheel which are arranged on a common drive shaft. The turbine wheel is provided with guide blades structured to be traversed by gases diagonally from the outside (periphery) of the wheel toward the inside (center) thereof. The blades have inlet edges and outlet edges whereby the inlet edges are substantially inclined, so that an entering gas flow is directed substantially perpendicularly to each inlet edge when the same is projected in the meridian plane, the cross section of the turbine wheel blades being arranged radially in sectional planes perpendicular to the wheel axis. The blades of the turbine wheel form at the inlet edge an entrance angle of less than 90* with respect to the wheel axis. The turbine has a housing constructed to constitute a single-flow spiral casing for gas admission over the entire circumferential surface of the turbine wheel, at the entrance portions of which there are provided at least two exhaust gas conduits, which are joined in such a way that their inlet cross section to the spiral casing is only slightly larger than the cross section at the respective ends of the gas conduits. The inlet edges of the blades of the turbine wheel assume a most favorable aerodynamic formation and are streamlined in profile. The means wheel diameter at the outlet edge of each blade of the compressor wheel is less than approximately 88 percent of the maximum outer diameter of the blades of the turbine wheel. The gas flow through the compressor wheel is diagonally directed for traversal of the wheel from the inside toward the outside thereof.
Inventors
- 👤 J Reisacher
- 👤 H Klaue
- 👤 D Bergmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:46
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/02; F01D9/026; F02; F02C; F02C6/00; F02C6/04; F02C6/10; F02C6/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
212 words
An exhaust gas turbocharger, for use with internal combustion engines, comprising turbine and compressor wheels arranged oN a common shaft; said turbine wheel having guide blades structured to be traversed by gases diagonally from the outside of said turbine wheel to the inside thereof; said blades having inlet edges substantially inclined, so that the direction of an entering gas flow, as projected in a meridian plane, is perpendicular to said inlet edges, as projected in the same meridian plane; the cross-section of said turbine wheel guide blades being arranged radially in sectional planes perpendicular to the turbine wheel axis; said turbine wheel guide blades forming, at the inlet edge, an entrance angle of less than 90* with respect to the turbine wheel axis; a housing for said turbine wheel in the form of a single-flow spiral casing for gas admission to said turbine wheel over the entire circumferential surface thereof; and at least two gas conduits connecting respective engine cylinders into said single-flow spiral casing, said gas conduits being joined at said spiral casing in a manner such that the combined inlet cross section of said conduits into said apiral casing is only slightly larger than the cross section of each gas conduit at the ends thereof connected to said spiral casing.
Claim 2
Dependent Claim
212 words
An exhaust gas turbocharger, for use with internal combustion engines, comprising turbine and compressor wheels arranged oN a common shaft; said turbine wheel having guide blades structured to be traversed by gases diagonally from the outside of said turbine wheel to the inside thereof; said blades having inlet edges substantially inclined, so that the direction of an entering gas flow, as projected in a meridian plane, is perpendicular to said inlet edges, as projected in the same meridian plane; the cross-section of said turbine wheel guide blades being arranged radially in sectional planes perpendicular to the turbine wheel axis; said turbine wheel guide blades forming, at the inlet edge, an entrance angle of less than 90* with respect to the turbine wheel axis; a housing for said turbine wheel in the form of a single-flow spiral casing for gas admission to said turbine wheel over the entire circumferential surface thereof; and at least two gas conduits connecting respective engine cylinders into said single-flow spiral casing, said gas conduits being joined at said spiral casing in a manner such that the combined inlet cross section of said conduits into said apiral casing is only slightly larger than the cross section of each gas conduit at the ends thereof connected to said spiral casing.
Claim 3
Dependent Claim
30 words
An exhaust gas turbocharger according to claim 1, in which the blades (2) of the turbine wheel have at the inlet edge (4) an entrance angle between 45* and 70*.
Claim 4
Dependent Claim
32 words
An exhaust gas turbocharger, according to claim 1, which in that the inlet edges (4) of said blades (2) of the turbine wheel assume an aerodynamic form and are streamlined in profile.
Claim 5
Dependent Claim
37 words
An exhaust gas turbocharger, according to claim 1, which in that the outside diameter (D2) at the outlet edge (16) of each blade (2) of said turbine wheel (1) is the maximum diameter of the turbine wheel.
Claim 6
Dependent Claim
51 words
An exhaust gas turbocharger according to claim 1, which in that the inlet cross section (Fsp) at the inlet (3) of said single-flow spiral casing (25) is by 5 to 15 percent larger than the cross section (Fp) at the end of each of said gas lines coming from said engine.
Claim 7
Dependent Claim
56 words
An exhaust gas turbocharger, according to claim 1, which in that the smallest distance ro of the direction of the entering gas flow from the axis of rotation is at most equal to 1.0 to 1.4 times the mean wheel radius (rl) at the inlet ledge (4) of said blades (2) of said turbine wheel (1)
Claim 8
Dependent Claim
43 words
An exhaust gas turbocharger according to claim 1, in which the distances (Rs) of the centers of gravity of the cross sections of the volute casing (7) from the shaft axis of rotation are kept as small as possible in all meridian sections.
Claim 9
Dependent Claim
21 words
An exhaust turbocharger according to claim 1, in which a radial diffuser (6) communicates with the wheel outlet of the turbine.
Claim 10
Dependent Claim
27 words
An exhaust gas turbocharger according to claim 1, in which the spiral turbine casing (7) and radial diffuser (6) are integrally connected with a bearing housing (8).
Claim 11
Dependent Claim
49 words
An exhaust gas turbocharger according to claim 1, in which the mean wheel diameter (D12) at the outlet edge (13) of each blade (12) of the compressor wheel (37) is less than 88 percent of the maximum outer diameter (D2) of the blade (2) of the turbine wheel 1.
Claim 12
Dependent Claim
26 words
An exhaust gas turbocharger, according to claim 10, in which the compressor wheel (37) is diagonally traversed from the center to the periphery of said wheel.
Claim 13
Dependent Claim
46 words
An exhaust gas turbocharger according to claim 10, in which the outlet edges (13) of the blades (12) of the compressor wheel (37), projected into meridian planes, are substantially perpendicular to the direction (38) of the flow of air passage projected into the same meridian planes.
Claim 14
Dependent Claim
33 words
An exhaust gas turbocharger, according to claim 10, in which the cross sections of the blades (12) of the compressor wheel (37) are arranged radially in sectional planes perpendicular to the wheel axis.
Claim 15
Dependent Claim
36 words
An exhaust gas turbocharger according to claim 10, in which each of the blades (12) of the compressor wheel (37) forms aT the respective outlet edge (13) an outlet angle Beta 2 of less than 90*.
Claim 16
Dependent Claim
35 words
An exhaust gas turbocharger, according to claim 10, in which the mean outlet diameter (D12) of the compressor wheel (37) is at most equal to the outer diameter (D11) of the compressor inlet edge (26).
Claim 17
Dependent Claim
37 words
An exhaust gas turbocharger, according to claim 1, in which each outlet edge of said compressor wheel and each inlet edge of said turbine wheel projects axially inwardly beyond the axially inner wall of the respective wheel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |