US6314737B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine having an activatable boost air delivery capacity adjusting
Assignee: Mercedes Benz Group AG
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Filing: 2000-01-14
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Granted: 2001-11-13
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Expires: 2020-01-14
Abstract
Abstract An internal combustion engine having one or more parallel exhaust-driven turbochargers that each comprise an activatable delivery capacity adjusting unit for variable adjustment of the boost air delivery capacity with malfunction monitoring of each individual delivery capacity adjusting unit wherein, upon detection of a malfunction of a respective delivery capacity adjusting unit, a corresponding malfunction datum is emitted.
Inventors
- 👤 Ulrich Springer
- 👤 Joachim Wiltschka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:13
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/22; F02B; F02B37/00; F02B37/007; F02B37/12; F02B37/24; F02C; F02C9/00; F02C9/16; F02C9/20; F02C9/22; F02D41/0002; F02D41/0007; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N13/107; F05; F05D; F05D2220/00; F05D2220/40; F05D2270/00; F05D2270/01; F05D2270/09; F05D2270/093; F05D2270/30; F05D2270/301; F05D2270/3015; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
118 words
An internal combustion engine comprising: at least one turbocharger driven by an exhaust gas flow of the engine, the at least one turbocharger including: a plurality of turbine blades; an activatable delivery capacity adjusting unit for variable adjustment of a boost air delivery capacity, the adjusting unit including a shifting apparatus for shifting an incident flow angle of the exhaust gas flow into the plurality of turbine blades and an incident flow angle control unit for controlling the shifting apparatus; a monitoring device for monitoring the adjusting unit for a malfunction, the device ascertaining whether the incident flow angle deviates from a predefined set flow angle within a predefined time period, and if so, emits a malfunction datum.
Claim 2
Dependent Claim
118 words
An internal combustion engine comprising: at least one turbocharger driven by an exhaust gas flow of the engine, the at least one turbocharger including: a plurality of turbine blades; an activatable delivery capacity adjusting unit for variable adjustment of a boost air delivery capacity, the adjusting unit including a shifting apparatus for shifting an incident flow angle of the exhaust gas flow into the plurality of turbine blades and an incident flow angle control unit for controlling the shifting apparatus; a monitoring device for monitoring the adjusting unit for a malfunction, the device ascertaining whether the incident flow angle deviates from a predefined set flow angle within a predefined time period, and if so, emits a malfunction datum.
Claim 3
Dependent Claim
23 words
The internal combustion engine as recited in claim 1 wherein the at least one turbocharger comprises a plurality of turbochargers functioning in parallel.
Claim 4
Dependent Claim
41 words
The internal combustion engine as recited in claim 2 wherein each turbocharger further comprises a boost outlet side, and wherein at least two of the parallel turbochargers have their boost outlet sides facing a common intake duct segment of the engine.
Claim 5
Dependent Claim
48 words
The internal combustion engine as recited in claim 3 further comprising a boost pressure sensor for sensing a boost pressure in the common intake duct section, and a boost pressure controller for adjusting an adjusting unit as a function of an output signal of the boost pressure sensor.
Claim 6
Dependent Claim
65 words
The internal combustion engine as recited in claim 2 wherein the monitoring includes a differential pressure sensor for sensing a pressure difference between a first boost pressure of a first of the plurality of turbochargers and a second boost pressure of a second of the plurality of turbochargers, and wherein the malfunction datum is emitted if the pressure difference exceeds a predetermined pressure difference value.
Claim 7
Dependent Claim
61 words
The internal combustion engine as recited in claim 2 wherein the monitoring device includes a plurality of air mass sensors for sensing a boost air mass delivered by the plurality of turbochargers and wherein the monitoring device emits the malfunction datum if the boost air mass deviates from a predefined boost air mass threshold value by more than a predefined value.
Claim 8
Dependent Claim
30 words
The internal combustion engine as recited in claim 1 further comprising a data bus and wherein the monitoring device sends the malfunction datum as a signal onto the data bus.
Claim 9
Dependent Claim
32 words
The internal combustion engine as recited in claim 1 further comprising an electric control line and wherein the adjusting unit sends activation signals over the electric control line in a first direction.
Claim 10
Dependent Claim
41 words
The internal combustion engine as recited in claim 8 wherein the monitoring device sends the malfunction datum as a periodic ground scanning signal over the electrical control line in a second direction, the second direction being opposite to the first direction.
Claim 11
Dependent Claim
59 words
The internal combustion engine as recited in claim 1 wherein the monitoring detector includes an air mass sensor for sensing a boost air mass delivered by the turbocharger and wherein the monitoring detector emits the malfunction datum if the measured boost air mass deviates persistently from a predefined boost air mass set point by more than a predefined value.
Claim 12
Dependent Claim
110 words
An internal combustion engine comprising: a plurality of parallel turbochargers, each turbocharger driven by an exhaust gas flow of the engine and including: a plurality of turbine blades; an activatable delivery capacity adjusting unit for variable adjustment of a boost air delivery capacity; a monitoring device for monitoring the adjusting unit for a malfunction, the monitoring device including a differential pressure sensor for sensing a pressure difference between a first boost pressure of a first of the plurality of turbochargers and a second boost pressure of a second of the plurality of turbochargers, and wherein the malfunction datum is emitted if the pressure difference exceeds a predetermined pressure difference value.
Claim 13
Dependent Claim
110 words
An internal combustion engine comprising: a plurality of parallel turbochargers, each turbocharger driven by an exhaust gas flow of the engine and including: a plurality of turbine blades; an activatable delivery capacity adjusting unit for variable adjustment of a boost air delivery capacity; a monitoring device for monitoring the adjusting unit for a malfunction, the monitoring device including a differential pressure sensor for sensing a pressure difference between a first boost pressure of a first of the plurality of turbochargers and a second boost pressure of a second of the plurality of turbochargers, and wherein the malfunction datum is emitted if the pressure difference exceeds a predetermined pressure difference value.
Claim 14
Dependent Claim
41 words
The internal combustion engine as recited in claim 11 wherein each turbocharger further comprises a boost outlet side, and wherein at least two of the parallel turbochargers have their boost outlet sides facing a common intake duct segment of the engine.
Claim 15
Dependent Claim
48 words
The internal combustion engine as recited in claim 12 further comprising a boost pressure sensor for sensing a boost pressure in the common intake duct section, and a boost pressure controller for adjusting an adjusting unit as a function of an output signal of the boost pressure sensor.
Claim 16
Dependent Claim
63 words
The internal combustion engine as recited in claim 11 wherein the monitoring detector includes an air mass sensor for sensing a boost air mass delivered by one of the plurality of turbochargers and wherein the monitoring detector emits the malfunction datum if the measured boost air mass deviates persistently from a predefined boost air mass set point by more than a predefined value.
Claim 17
Dependent Claim
32 words
The internal combustion engine as recited in claim 11 further comprising an electric control line and wherein the adjusting unit sends activation signals over the electric control line in a first direction.
Claim 18
Dependent Claim
41 words
The internal combustion engine as recited in claim 15 wherein the monitoring device sends the malfunction datum as a periodic ground scanning signal over the electric control line in a second direction, the second direction being opposite to the first direction.
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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) | 2004-11-12 | 2005-05-14 | 2005-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-12 | 2009-05-14 | 2009-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-12 | 2013-05-14 | 2013-11-13 | $7700.00 | Window Closed / Lapsed |