US6378307B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine with an exhaust gas turbocharger, and associated method
Assignee: Mercedes Benz Group AG
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Filing: 2000-11-17
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Granted: 2002-04-30
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Expires: 2020-11-17
Abstract
Abstract An internal combustion engine has an exhaust gas turbocharger with an exhaust gas turbine and a compressor. In addition, an air-driven turbine is provided which is torsionally connected to the compressor and to which combustion air can be supplied via an adjustable shut-off element. For operation of the exhaust gas turbocharger over a wide operating spectrum, an additional duct is provided between compressor inlet and the air inlet of the air turbine, the air supply in the additional duct being adjustable by the shut-off element. In the lower load range, in the case where the required boost pressure falls below a threshold value, the additional duct is opened by means of the shut-off element and the air supply to the compressor inlet is reduced.
Inventors
- 👤 Peter Fledersbacher
- 👤 Siegfried Sumser
- 👤 Juergen Willand
- 👤 Friedrich Wirbeleit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:28
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/04; F02B37/10; F02B37/12; F02B37/14; F02B37/22; F02B37/225; F02B37/24; F02B29/00; F02B29/04; F02B29/0406; F02M; F02M26/00; F02M26/02; F02M26/04; F02M26/05; F02M26/08; F02M26/09; F02M26/10; F02M26/13; F02M26/22; F02M26/23; F02M26/28; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
186 words
Internal combustion engine with an exhaust gas turbocharger, which comprises an exhaust gas turbine and a compressor for generating compressed boost air, having an additional, air-driven turbine, which is torsionally connected to the compressor and to which combustion air can be supplied via an adjustable shut-off element, a turbine outlet of the air-driven turbine being connected by a connecting duct to the induction path downstream of the compressor and having a closed-loop and open-chain control unit for generating setting signals which adjust the shut-off element, wherein an additional duct is provided between the compressor inlet or a line section opening into the compressor inlet and the air inlet of the air-driven turbine, wherein the air supply in the additional duct and in the compressor inlet can be adjusted by the shut-off element, and wherein in a lower load range, in a case where required boost pressure falls below a threshold value, a setting signal is generated in the closed-loop and open-chain control unit, which setting signal adjusts the shut-off element into a position opening the additional duct and reducing the air supply to the compressor inlet.
Claim 2
Dependent Claim
186 words
Internal combustion engine with an exhaust gas turbocharger, which comprises an exhaust gas turbine and a compressor for generating compressed boost air, having an additional, air-driven turbine, which is torsionally connected to the compressor and to which combustion air can be supplied via an adjustable shut-off element, a turbine outlet of the air-driven turbine being connected by a connecting duct to the induction path downstream of the compressor and having a closed-loop and open-chain control unit for generating setting signals which adjust the shut-off element, wherein an additional duct is provided between the compressor inlet or a line section opening into the compressor inlet and the air inlet of the air-driven turbine, wherein the air supply in the additional duct and in the compressor inlet can be adjusted by the shut-off element, and wherein in a lower load range, in a case where required boost pressure falls below a threshold value, a setting signal is generated in the closed-loop and open-chain control unit, which setting signal adjusts the shut-off element into a position opening the additional duct and reducing the air supply to the compressor inlet.
Claim 3
Dependent Claim
40 words
Internal combustion engine according to claim 1 , wherein the air-driven turbine and the compressor are configured as a one-piece component with a common casing, and wherein the additional duct opens into the compressor inlet level with the compressor impeller.
Claim 4
Dependent Claim
44 words
Internal combustion engine according to claim 2 , wherein the inlet flow direction encloses an angle with the main flow direction through the compressor or turbine inlet in the region of the outlet opening between the additional duct and the compressor or turbine inlet.
Claim 5
Dependent Claim
30 words
Internal combustion engine according to claim 2 , wherein a throttle device is introduced in the region of the outlet opening between the additional duct and compressor or turbine inlet.
Claim 6
Dependent Claim
27 words
Internal combustion engine according to claim 4 , wherein the throttle device is a guide vane cascade which variably adjusts the cross section of the outlet opening.
Claim 7
Dependent Claim
29 words
Internal combustion engine according to claim 2 , wherein the additional duct is guided to the air-driven turbine through a heat exchanger for preheating the air to be supplied.
Claim 8
Dependent Claim
44 words
Internal combustion engine according to claim 1 , wherein the inlet flow direction encloses an angle, with the main flow direction through the compressor or turbine inlet in the region of the outlet opening between the additional duct and the compressor or turbine inlet.
Claim 9
Dependent Claim
30 words
Internal combustion engine according to claim 7 , wherein a throttle device is introduced in the region of the outlet opening between the additional duct and compressor or turbine inlet.
Claim 10
Dependent Claim
27 words
Internal combustion engine according to claim 8 , wherein the throttle device is a guide vane cascade which variably adjusts the cross section of the outlet opening.
Claim 11
Dependent Claim
29 words
Internal combustion engine according to claim 1 , wherein a throttle device is introduced in the region the outlet opening between the additional duct and compressor or turbine inlet.
Claim 12
Dependent Claim
27 words
Internal combustion engine according to claim 10 , wherein the throttle device is a guide vane cascade which variably adjusts the cross section of the outlet opening.
Claim 13
Dependent Claim
17 words
Internal combustion engine according to claim 11 , wherein the guide vane cascade has adjustable guide vanes.
Claim 14
Dependent Claim
26 words
Internal combustion engine according to claim 11 , wherein an adjustable shut-off element is provided in the additional duct in addition to the guide vane cascade.
Claim 15
Dependent Claim
26 words
Internal combustion engine according to claim 13 , wherein the shut-off element is an axially displaceable matrix which has recesses for accommodating the guide vane cascade.
Claim 16
Dependent Claim
20 words
Internal combustion engine according to claim 1 , wherein the air-driven turbine is an autonomous component independent of the compressor.
Claim 17
Dependent Claim
18 words
Internal combustion engine according to claim 15 , wherein the air-driven turbine is directly adjacent to the compressor.
Claim 18
Dependent Claim
20 words
Internal combustion engine according to claim 15 , wherein the air-driven turbine is directly adjacent to the exhaust gas turbine.
Claim 19
Dependent Claim
29 words
Internal combustion engine according to claim 1 , wherein the additional duct is guided to the air-driven turbine through a heat exchanger for preheating the air to be supplied.
Claim 20
Dependent Claim
28 words
Internal combustion engine according to claim 18 , wherein the heat energy of the heat exchanger is derived from the exhaust gases downstream of the exhaust gas turbine.
Claim 21
Dependent Claim
99 words
Method of operating an internal combustion engine having an exhaust gas turbocharger with an exhaust gas turbine and a compressor for generating compressed boost air, having an additional, air-driven turbine, which is torsionally connected to the compressor and to which combustion air can be supplied via an adjustable shut-off element, the turbine outlet being connected to a duct section communicating with the compressor outlet, wherein, in a lower load range, in a case where the required boost pressure falls below a threshold value, at least a partial flow of the induced combustion air is guided via the air-driven turbine.
Claim 22
Dependent Claim
99 words
Method of operating an internal combustion engine having an exhaust gas turbocharger with an exhaust gas turbine and a compressor for generating compressed boost air, having an additional, air-driven turbine, which is torsionally connected to the compressor and to which combustion air can be supplied via an adjustable shut-off element, the turbine outlet being connected to a duct section communicating with the compressor outlet, wherein, in a lower load range, in a case where the required boost pressure falls below a threshold value, at least a partial flow of the induced combustion air is guided via the air-driven turbine.
Claim 23
Dependent Claim
26 words
Method according to claim 20 , wherein below the threshold value for the required boost pressure, the air supply to the compressor inlet is shut off.
Claim 24
Dependent Claim
38 words
Method according to claim 20 , wherein the air-driven turbine and the compressor are configured as a one-piece component with a common casing, and wherein the additional duct opens into the compressor inlet level with the compressor impeller.
Claim 25
Dependent Claim
18 words
Method according to claim 20 , wherein the air-driven turbine is an autonomous component independent of the compressor.
Claim 26
Dependent Claim
16 words
Method according to claim 23 , wherein the air-driven turbine is directly adjacent to the compressor.
Claim 27
Dependent Claim
18 words
Method according to claim 23 , wherein the air-driven turbine is directly adjacent to the exhaust gas turbine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-04-29 | 2005-10-29 | 2006-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-29 | 2009-10-29 | 2010-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-29 | 2013-10-29 | 2014-04-30 | $7700.00 | Window Closed / Lapsed |