Patent GB2031069A successfully refreshed from Google Patents.
GB2031069A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Turbine of exhaust gas turbo- charger
Assignee: MAN AG
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Filing: 1979-09-14
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Granted: —
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Expires: 1999-09-14
Abstract
Abstract The turbine inflow passage 3 is divided into sub-channels 5 by annular partition(s) 4, and at least one annular shutter 11, 12 is mounted coaxially with the annular partition(s) and slidably along its axis for closing one or more of the sub- channels during starting and under partial load of the internal combustion engine whereby the exhaust- gas flows at higher velocity through the sub-channel(s) left open; for full load operation all the sub-channels are opened. With coaxial annular partition(s) and shutter(s) optimum inflow conditions prevail in all operative conditions. The annular shutter(s) and partition(s) are preferably coaxial with the turbine axis. In use, radially inner sub-channel(s) are closed in preference to radially outer ones for better turbine efficiency. In a two-stage turbine one of the sub-channels may by-pass the first stage. <IMAGE>
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-11-01 13:58
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F01D17/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
122 words
A turbine for an exhaust-gas driven supercharger for an internal combustion engine, in which the passage for ducting exhaust gas to the turbine rotor includes an annular partition which divides the inflow passage into sub-channels, and in which there is provided at least one annular shutter mounted coaxially with the annular partition and so as to be displaceable in a direction along its axis, the annular shutter being arranged for movement between a position in which it closes one of the sub-channels so that exhaust gas passes to the turbine rotor via the other subchannel or channels, and a position in which the said one of the sub-channels is open for the passage of exhaust gas through it to the turbine rotor.
Claim 2
Dependent Claim
122 words
A turbine for an exhaust-gas driven supercharger for an internal combustion engine, in which the passage for ducting exhaust gas to the turbine rotor includes an annular partition which divides the inflow passage into sub-channels, and in which there is provided at least one annular shutter mounted coaxially with the annular partition and so as to be displaceable in a direction along its axis, the annular shutter being arranged for movement between a position in which it closes one of the sub-channels so that exhaust gas passes to the turbine rotor via the other subchannel or channels, and a position in which the said one of the sub-channels is open for the passage of exhaust gas through it to the turbine rotor.
Claim 3
Dependent Claim
37 words
A turbine as claimed in claim 1, in which the annular shutter comprises an annular slide plate and in which the annular partition and the annular slide plate are arranged coaxially with the axis of the turbine.
Claim 4
Dependent Claim
49 words
A turbine as claimed in claim 1 or claim 2, in which two annular partitions are disposed in the inflow passage, which divide the inflow passage into three sub-channels, and in which the annular shutter or shutters are adapted to close and open at least two of the sub-channels.
Claim 5
Dependent Claim
60 words
A turbine as claimed in any one of claims 1 to 3, which includes a first turbine rotor constituting a first turbine stage and a second turbine rotor constituting a second turbine stage, and in which one of the subchannels by-passes the first turbine stage and thereby ducts exhaust gas from the inflow passage direct to the second turbine stage.
Claim 6
Dependent Claim
32 words
A turbine as claimed in any one of the preceding claims, in which the or at least one annular shutter is displaceable in a direction along its axis by a screwthreaded arrangement.
Claim 7
Dependent Claim
33 words
A turbine as claimed in any one of claims 1 to 4, in which the or at least one annular shutter is displaceable in a direction along its axis by an electric motor.
Claim 8
Dependent Claim
34 words
A turbine as claimed in any one of claims 1 to 4, in which the or at least one annular shutter is displaceable in a direction along its axis by a fluid jack arrangement.
Claim 9
Dependent Claim
74 words
A turbine as claimed in any one of the preceding claims, which is an axial flow turbine, and in which the turbine blades on the rotor of the turbine are provided with platform partitions extending in the peripheral direction of the rotor and arranged at a radial height on the turbine blades such that they are aligned, in the direction of flow of exhaust gas through the turbine, with the annular partition or partitions.
Claim 10
Dependent Claim
55 words
A turbine as claimed in any one of the preceding claims, in which control means is provided whereby the or at least one of the annular shutters is shifted in dependence on changes in the load of the internal combustion engine and/or the rotational speed of the exhaust-gas driven supercharger and the charge air pressure.
Claim 11
Dependent Claim
49 words
1 0. A method of operating a turbine as claimed in any one of the preceding claims, in which when starting, and during partial load of, the internal combustion, the sub-channel or sub-channels lying radially inwardly of a radially outer sub-channel is/are closed by the annular shutter or shutters.
Claim 12
Dependent Claim
80 words
A turbine of an exhaust-gas driven supercharger for an internal combustion engine substantially as specifically described herein with reference to Fig. 1 or to Fig. 2 or to Fig. 3 of the accompanying drawings. 1 2. An exhaust-gas driven supercharger for an internal combustion engine having a turbine as claimed in any one of claims 1 to 9 or in claim 11. 1 3. A method of operating a turbine as claimed in claim 11 substantially as specifically described herein.
References Cited (Backward Citations)
No citation records indexed.
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