US6401457B1
Expired / Lapsed
US
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System for estimating turbocharger compressor outlet temperature
Assignee: Cummins Inc
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Filing: 2001-01-31
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Granted: 2002-06-11
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Expires: 2021-01-31
Abstract
Abstract A system for estimating turbocharger compressor outlet temperature includes an engine controller responsive to any two of corrected turbocharger speed, corrected fresh mass air flow and turbocharger compressor pressure ratio (compressor outlet pressure/compressor inlet pressure) to compute compressor outlet temperature based on a corresponding compressor outlet temperature model.
Inventors
- 👤 Yue Yun Wang
- 👤 John M. Mulloy
- 👤 Mark W. Pyclik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:56
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02B; F02B37/00; F02B37/12; F02B37/18; F02M; F02M19/00; F02M25/00; F02M25/06; F02M26/00; F02M26/45; F02M26/46; F02M26/47; F02B29/00; F02B29/04; F02B29/0406; F02B29/0493; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0406; F02D2200/0414; F02D41/02; F02D41/14; F02D41/1401; F02D41/1405; F02D41/18; F02D41/187; F02M26/02; F02M26/04; F02M26/05; F02M26/13; F02M26/22; F02M26/23; F02M26/33; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
154 words
A system for estimating turbocharger compressor outlet temperature, comprising: a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; a turbocharger speed sensor producing a turbocharger speed signal indicative of turbocharger rotational speed; means for determining air pressure within said compressor outlet and producing a first pressure signal corresponding thereto; a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a second pressure signal corresponding thereto; means for determining a mass flow of fresh air entering said compressor inlet and producing a mass air flow signal corresponding thereto; and a control circuit computing a pressure ratio as a ratio of said first and second pressure signals, said control circuit estimating a temperature of said compressor outlet as a function of any two of said turbocharger speed signal, said mass air flow signal and said pressure ratio.
Claim 2
Independent Claim
154 words
A system for estimating turbocharger compressor outlet temperature, comprising: a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; a turbocharger speed sensor producing a turbocharger speed signal indicative of turbocharger rotational speed; means for determining air pressure within said compressor outlet and producing a first pressure signal corresponding thereto; a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a second pressure signal corresponding thereto; means for determining a mass flow of fresh air entering said compressor inlet and producing a mass air flow signal corresponding thereto; and a control circuit computing a pressure ratio as a ratio of said first and second pressure signals, said control circuit estimating a temperature of said compressor outlet as a function of any two of said turbocharger speed signal, said mass air flow signal and said pressure ratio.
Claim 3
Dependent Claim
49 words
The system of claim 1 further including a compressor inlet temperature sensor sensing a temperature of air entering said compressor inlet and producing a compressor inlet temperature signal corresponding thereto, said control circuit estimating said temperature of said compressor outlet further as a function of said compressor inlet temperature.
Claim 4
Dependent Claim
91 words
The system of claim 2 wherein said control circuit includes: means for determining a corrected turbocharger speed value as a function of said turbocharger speed signal and said compressor inlet temperature signal; means for determining a corrected mass air flow value as a function of said mass air flow signal, said compressor inlet temperature signal and said compressor inlet pressure; and means for estimating said temperature of said compressor outlet as a function of said compressor inlet temperature signal, said corrected turbocharger speed value and said corrected mass air flow value.
Claim 5
Dependent Claim
60 words
The system of claim 2 wherein said control circuit includes: means for determining a corrected turbocharger speed value as a function of said turbocharger speed signal and said compressor inlet temperature signal; and means for estimating said temperature of said compressor outlet as a function of said compressor inlet temperature signal, said corrected turbocharger speed value and said pressure ratio.
Claim 6
Dependent Claim
67 words
The system of claim 2 wherein said control circuit includes: means for determining a corrected mass air flow value as a function of said mass air flow signal, said compressor inlet temperature signal and said compressor inlet pressure; and means for estimating said temperature of said compressor outlet as a function of said compressor inlet temperature signal, said corrected mass air flow value and said pressure ratio.
Claim 7
Independent Claim
93 words
A system for estimating turbocharger compressor outlet temperature, comprising: a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; a turbocharger speed sensor producing a turbocharger speed signal indicative of turbocharger rotational speed; means for determining a mass flow of fresh air entering said compressor inlet and producing a mass air flow signal corresponding thereto; and a control circuit estimating a temperature of said compressor outlet as a function said turbocharger speed signal and said mass air flow signal.
Claim 8
Independent Claim
93 words
A system for estimating turbocharger compressor outlet temperature, comprising: a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; a turbocharger speed sensor producing a turbocharger speed signal indicative of turbocharger rotational speed; means for determining a mass flow of fresh air entering said compressor inlet and producing a mass air flow signal corresponding thereto; and a control circuit estimating a temperature of said compressor outlet as a function said turbocharger speed signal and said mass air flow signal.
Claim 9
Dependent Claim
49 words
The system of claim 6 further including a compressor inlet temperature sensor sensing a temperature of air entering said compressor inlet and producing a compressor inlet temperature signal corresponding thereto, said control circuit estimating said temperature of said compressor outlet further as a function of said compressor inlet temperature.
Claim 10
Dependent Claim
62 words
The system of claim 7 wherein said control circuit includes: means for determining a corrected turbocharger speed value as a function of said turbocharger speed signal and said compressor inlet temperature signal; and means for estimating said temperature of said compressor outlet as a function of said compressor inlet temperature signal, said corrected turbocharger speed value and said mass air flow value.
Claim 11
Dependent Claim
102 words
The system of claim 8 further including a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a pressure signal corresponding thereto; and wherein said control circuit includes means for determining a corrected mass air flow value as a function of said mass air flow signal, said compressor inlet temperature signal and said pressure signal; and wherein said means for estimating said temperature of said compressor outlet includes means for estimating said temperature of said compressor outlet as a function of said corrected turbocharger speed value, said corrected mass air flow value and said compressor inlet temperature signal.
Claim 12
Independent Claim
124 words
A system for estimating turbocharger compressor outlet temperature, comprising: a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; a turbocharger speed sensor producing a turbocharger speed signal indicative of turbocharger rotational speed; means for determining air pressure within said compressor outlet and producing a first pressure signal corresponding thereto; a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a second pressure signal corresponding thereto; and a control circuit computing a pressure ratio as a ratio of said first and second pressure signals, said control circuit estimating a temperature of said compressor outlet as a function of said turbocharger speed signal and said pressure ratio.
Claim 13
Independent Claim
124 words
A system for estimating turbocharger compressor outlet temperature, comprising: a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; a turbocharger speed sensor producing a turbocharger speed signal indicative of turbocharger rotational speed; means for determining air pressure within said compressor outlet and producing a first pressure signal corresponding thereto; a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a second pressure signal corresponding thereto; and a control circuit computing a pressure ratio as a ratio of said first and second pressure signals, said control circuit estimating a temperature of said compressor outlet as a function of said turbocharger speed signal and said pressure ratio.
Claim 14
Dependent Claim
49 words
The system of claim 10 further including a compressor inlet temperature sensor sensing a temperature of air entering said compressor inlet and producing a compressor inlet temperature signal corresponding thereto, said control circuit estimating said temperature of said compressor outlet further as a function of said compressor inlet temperature.
Claim 15
Dependent Claim
60 words
The system of claim 11 wherein said control circuit includes: means for determining a corrected turbocharger speed value as a function of said turbocharger speed signal and said compressor inlet temperature signal; and means for estimating said temperature of said compressor outlet as a function of said compressor inlet temperature signal, said corrected turbocharger speed value and said pressure ratio.
Claim 16
Independent Claim
132 words
A system for estimating turbocharger compressor outlet temperature, comprising: a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; means for determining a mass of fresh air entering said compressor inlet and producing a mass air flow signal corresponding thereto; means for determining air pressure within said compressor outlet and producing a first pressure signal corresponding thereto; a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a second pressure signal corresponding thereto; and a control circuit computing a pressure ratio as a ratio of said first and second pressure signals, said control circuit estimating a temperature of said compressor outlet as a function of said mass air flow signal and said pressure ratio.
Claim 17
Independent Claim
132 words
A system for estimating turbocharger compressor outlet temperature, comprising: a turbocharger having a compressor defining a compressor inlet and a compressor outlet fluidly coupled to an intake manifold of an internal combustion engine; means for determining a mass of fresh air entering said compressor inlet and producing a mass air flow signal corresponding thereto; means for determining air pressure within said compressor outlet and producing a first pressure signal corresponding thereto; a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a second pressure signal corresponding thereto; and a control circuit computing a pressure ratio as a ratio of said first and second pressure signals, said control circuit estimating a temperature of said compressor outlet as a function of said mass air flow signal and said pressure ratio.
Claim 18
Dependent Claim
49 words
The system of claim 13 further including a compressor inlet temperature sensor sensing a temperature of air entering said compressor inlet and producing a compressor inlet temperature signal corresponding thereto, said control circuit estimating said temperature of said compressor outlet further as a function of said compressor inlet temperature.
Claim 19
Dependent Claim
88 words
The system of claim 14 further including a compressor inlet pressure sensor sensing air pressure within said compressor inlet and producing a pressure signal corresponding thereto; and wherein said control circuit includes: means for determining a corrected mass air flow value as a function of said mass air flow signal, said compressor inlet temperature signal and said pressure signal; and means for estimating said temperature of said compressor outlet as a function of said corrected mass air flow value, said pressure ratio and said compressor inlet temperature signal.
Claim 20
Independent Claim
67 words
A method of estimating turbocharger compressor outlet temperature, comprising the steps of: determining a rotational speed of a turbocharger for an internal combustion engine; determining a mass air flow corresponding to a mass flow of fresh air entering a compressor inlet of said turbocharger; and estimating a temperature of a compressor outlet of said turbocharger as a function of said rotational speed and said mass air flow.
Claim 21
Independent Claim
67 words
A method of estimating turbocharger compressor outlet temperature, comprising the steps of: determining a rotational speed of a turbocharger for an internal combustion engine; determining a mass air flow corresponding to a mass flow of fresh air entering a compressor inlet of said turbocharger; and estimating a temperature of a compressor outlet of said turbocharger as a function of said rotational speed and said mass air flow.
Claim 22
Dependent Claim
47 words
The method of claim 16 further including the step of determining a compressor inlet temperature corresponding to a temperature of air entering said compressor inlet; and wherein the estimating step includes estimating said temperature of said compressor outlet further as a function of said compressor inlet temperature.
Claim 23
Dependent Claim
45 words
The method of claim 17 further including the step of determining a compressor inlet pressure corresponding to air pressure within said compressor inlet; and wherein the estimating step includes estimating said temperature of said compressor outlet further as a function of said compressor inlet pressure.
Claim 24
Independent Claim
80 words
A method of estimating turbocharger compressor outlet temperature, comprising the steps of: determining a rotational speed of a turbocharger for an internal combustion engine; determining a compressor outlet pressure corresponding to air pressure within a compressor outlet of said turbocharger; determining a compressor inlet pressure corresponding to air pressure within a compressor inlet of said turbocharger; and estimating a temperature of said compressor outlet as a function of said rotational speed, said compressor inlet pressure and said compressor outlet pressure.
Claim 25
Independent Claim
80 words
A method of estimating turbocharger compressor outlet temperature, comprising the steps of: determining a rotational speed of a turbocharger for an internal combustion engine; determining a compressor outlet pressure corresponding to air pressure within a compressor outlet of said turbocharger; determining a compressor inlet pressure corresponding to air pressure within a compressor inlet of said turbocharger; and estimating a temperature of said compressor outlet as a function of said rotational speed, said compressor inlet pressure and said compressor outlet pressure.
Claim 26
Dependent Claim
47 words
The method of claim 19 further including the step of determining a compressor inlet temperature corresponding to a temperature of air entering said compressor inlet; and wherein the estimating step includes estimating said temperature of said compressor outlet further as a function of said compressor inlet temperature.
Claim 27
Independent Claim
90 words
A method of estimating turbocharger compressor outlet temperature, comprising the steps of: determining a mass air flow corresponding to a mass flow of fresh air entering a compressor inlet of a turbocharger for an internal combustion engine; determining a compressor inlet pressure corresponding to air pressure within said compressor inlet; determining a compressor outlet pressure corresponding to air pressure within a compressor outlet of said turbocharger; and estimating a temperature of said compressor outlet as a function of said mass air, said compressor inlet pressure and said compressor outlet pressure.
Claim 28
Independent Claim
90 words
A method of estimating turbocharger compressor outlet temperature, comprising the steps of: determining a mass air flow corresponding to a mass flow of fresh air entering a compressor inlet of a turbocharger for an internal combustion engine; determining a compressor inlet pressure corresponding to air pressure within said compressor inlet; determining a compressor outlet pressure corresponding to air pressure within a compressor outlet of said turbocharger; and estimating a temperature of said compressor outlet as a function of said mass air, said compressor inlet pressure and said compressor outlet pressure.
Claim 29
Dependent Claim
47 words
The method of claim 21 further including the step of determining a compressor inlet temperature corresponding to a temperature of air entering said compressor inlet; and wherein the estimating step includes estimating said temperature of said compressor outlet further as a function of said compressor inlet temperature.
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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) | 2005-06-10 | 2005-12-10 | 2006-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-06-10 | 2009-12-10 | 2010-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-06-10 | 2013-12-10 | 2014-06-11 | $7700.00 | Window Closed / Lapsed |