US5845495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for recognizing differences in RPM between two exhaust gas turbochargers
Assignee: Robert Bosch GmbH
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Filing: 1997-01-09
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Granted: 1998-12-08
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Expires: 2017-01-09
Abstract
Abstract An arrangement enabling a reliable detection of speed-of-rotation deviations between two exhaust-gas turbochargers of an internal combustion having separate cylinder banks included a device, which determines the difference between the pressures prevailing in the two exhaust trains of the two cylinder banks upstream from the exhaust turbines and signals a relevant speed deviation when the pressure difference determined exceeds a specifiable threshold.
Inventors
- 👤 Bernhard Schray
- 👤 Werner Haming
- 👤 Michael Bauerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:39
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/007; F02B37/12; F02B37/18; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N13/107; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
An arrangement for detecting speed-of-rotation deviations between two exhaust-gas turbochargers of an internal combustion engine, the arrangement comprising: a first cylinder bank; a second cylinder bank; a first exhaust train including a first exhaust turbine provided for the first cylinder bank; a second exhaust train including a second exhaust turbine provided for the second cylinder bank; and a device determining a difference between first and second pressures, between first and second gas masses, or between first and second gas volumes present in the first and second exhaust trains, respectively, upstream from the first and second exhaust turbines, respectively, the device indicating a speed deviation when the difference exceeds a predetermined threshold.
Claim 2
Dependent Claim
111 words
An arrangement for detecting speed-of-rotation deviations between two exhaust-gas turbochargers of an internal combustion engine, the arrangement comprising: a first cylinder bank; a second cylinder bank; a first exhaust train including a first exhaust turbine provided for the first cylinder bank; a second exhaust train including a second exhaust turbine provided for the second cylinder bank; and a device determining a difference between first and second pressures, between first and second gas masses, or between first and second gas volumes present in the first and second exhaust trains, respectively, upstream from the first and second exhaust turbines, respectively, the device indicating a speed deviation when the difference exceeds a predetermined threshold.
Claim 3
Dependent Claim
26 words
The arrangement according to claim 1, wherein the device indicates the speed deviation when the difference exceeds the predetermined threshold for a predetermined period of time.
Claim 4
Dependent Claim
29 words
The arrangement according to claim 1, wherein the predetermined threshold is a function of at least one of an air mass and an air volume in an induction pipe.
Claim 5
Dependent Claim
28 words
The arrangement according to claim 1, wherein the predetermined threshold is a function of at least one of a speed and a load of the internal combustion engine.
Claim 6
Dependent Claim
63 words
The arrangement according to claim 1, wherein the device provides a controllable variable to each of at least one boost-pressure controller in response to the speed deviation, each of the at least one boost-pressure controller being associated with a respective one of the exhaust-gas turbochargers, the controllable variable being provided as a function of a speed-dependent characteristics map and a load-dependent characteristics map.
Claim 7
Dependent Claim
24 words
The arrangement according to claim 1, wherein the device generates a cylinder-selective suppression of a fuel injection as a function of the speed deviation.
Claim 8
Dependent Claim
28 words
The arrangement according to claim 1, wherein the device generates a limitation value of a maximum opening of a throttle valve as a function of the speed deviation.
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) | 2001-12-07 | 2002-06-08 | 2002-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-07 | 2006-06-08 | 2006-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-07 | 2010-06-08 | 2010-12-08 | $7700.00 | Window Closed / Lapsed |