US7296562B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system and method for estimating turbocharger performance
Assignee: Caterpillar Inc
•
Filing: 2006-03-30
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Granted: 2007-11-20
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Expires: 2026-03-30
Abstract
Abstract A control system for estimating the performance of a compressor is disclosed. The control system has a compressor fluidly connected to an inlet manifold of a power source. The control system also has a power source speed sensor to provide an indication of a rotational speed of the power source, an inlet pressure sensor to provide an indication of a pressure of a fluid within the inlet manifold, an inlet temperature sensor to provide an indication of a temperature of the fluid within the inlet manifold, an atmospheric pressure sensor to provide an indication of an atmospheric pressure, and a control module in communication with each of the sensors. The control module is configured to monitor an engine valve opening duration and an exhaust gas recirculation valve position, and estimate a compressor inlet pressure based on the provided indications, the monitored duration, and the monitored position.
Inventors
- 👤 Michael P. Withrow
- 👤 Kevin L. Dea
- 👤 Christopher R. Gehrke
- 👤 II Michael R. Donoho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:00
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F01; F01N; F01N11/00; F01N11/002; F02B; F02B39/00; F02B39/16; F02D41/0025; F02D41/0047; F02D41/0065; F02D41/0072; F02M; F02M26/00; F02M26/45; F02M26/46; F02M26/47; F02B29/00; F02B29/04; F02B29/0406; F02D2041/001; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0406; F02D2200/0408; F02D2200/0414; F02D2200/70; F02D2200/703; F02M26/02; F02M26/04; F02M26/06; F02M26/13; F02M26/22; F02M26/23; F02M26/35; F02M26/36; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
197 words
A control system for estimating performance of a compressor, comprising: a compressor fluidly connected to an inlet manifold of a power source and being configured to receive a mixed flow of air and exhaust; a power source speed sensor associated with an output of the power source and being configured to provide an indication of a rotational speed of the power source; an inlet pressure sensor associated with the inlet manifold and being configured to provide an indication of a pressure of a fluid within the inlet manifold; an inlet temperature sensor associated with the inlet manifold of the power source and being configured to provide an indication of a temperature of the fluid within the inlet manifold; an atmospheric pressure sensor configured to provide an indication of an atmospheric pressure; and a control module in communication with the power source speed sensor, inlet pressure sensor, inlet temperature sensor, and atmospheric pressure sensor, the control module being configured to: monitor: an engine valve opening duration; and an exhaust gas recirculation valve position; and estimate a compressor inlet pressure based on the provided indications, the monitored engine valve opening duration, and the monitored exhaust gas recirculation valve position.
Claim 2
Dependent Claim
197 words
A control system for estimating performance of a compressor, comprising: a compressor fluidly connected to an inlet manifold of a power source and being configured to receive a mixed flow of air and exhaust; a power source speed sensor associated with an output of the power source and being configured to provide an indication of a rotational speed of the power source; an inlet pressure sensor associated with the inlet manifold and being configured to provide an indication of a pressure of a fluid within the inlet manifold; an inlet temperature sensor associated with the inlet manifold of the power source and being configured to provide an indication of a temperature of the fluid within the inlet manifold; an atmospheric pressure sensor configured to provide an indication of an atmospheric pressure; and a control module in communication with the power source speed sensor, inlet pressure sensor, inlet temperature sensor, and atmospheric pressure sensor, the control module being configured to: monitor: an engine valve opening duration; and an exhaust gas recirculation valve position; and estimate a compressor inlet pressure based on the provided indications, the monitored engine valve opening duration, and the monitored exhaust gas recirculation valve position.
Claim 3
Dependent Claim
64 words
The control system of claim 1 , further including: an exhaust gas pressure sensor configured to provide an indication of an exhaust gas pressure; and an exhaust gas temperature sensor configured to provide an indication of an exhaust gas temperature, wherein the control module is further configured to determine an exhaust gas density based on the provided indications of exhaust gas pressure and temperature.
Claim 4
Dependent Claim
63 words
The control system of claim 2 , further including an exhaust gas differential pressure sensor configured to provide an indication of an exhaust gas differential pressure associated with an exhaust venturi, wherein the control module is further configured estimate an exhaust gas recirculation mass air flow value based on the provided indication of exhaust gas differential pressure and the determined exhaust gas density.
Claim 5
Dependent Claim
125 words
The control system of claim 3 , further including an atmospheric temperature sensor configured to provide an indication of an atmospheric temperature, wherein the control module is further configured to: estimate a total mass air flow of fluid through the compressor based on: the monitored engine valve opening duration; the provided indication of a rotational speed of the power source; the provided indication of a pressure of a fluid within the inlet manifold; and the provided indication of a temperature of the fluid within the inlet manifold; and estimate a compressor inlet temperature based on: the estimated total mass air flow; the provided indication of an atmospheric temperature; the estimated exhaust gas recirculation mass air flow; and the provided indication of an exhaust gas temperature.
Claim 6
Dependent Claim
42 words
The control system of claim 4 , wherein the control module is further configured to estimate a compressor outlet pressure based on: the estimated total mass air flow; and the provided indication of a pressure of a fluid within the inlet manifold.
Claim 7
Dependent Claim
38 words
The control system of claim 5 , wherein the control module is further configured to estimate a compressor efficiency based on: the estimated total mass air flow; the estimated compressor outlet pressure; and the estimated compressor inlet pressure.
Claim 8
Dependent Claim
60 words
The control system of claim 5 , further including a compressor speed sensor configured to provide an indication of a rotational speed of the compressor, wherein the control module is further configured to estimate a compressor efficiency based on: the estimated compressor outlet pressure; the estimated compressor inlet pressure; and the provided indication of a rotational speed of the compressor.
Claim 9
Dependent Claim
56 words
The control system of claim 4 , further including a compressor speed sensor configured to provide an indication of a rotational speed of the compressor, wherein the control module is further configured to estimate a compressor efficiency based on: the estimated total mass air flow; and the provided indication of a rotational speed of the compressor.
Claim 10
Independent Claim
83 words
A method of estimating performance of a compressor, comprising: receiving an indication of a rotational speed of the power source; receiving an indication of a pressure of a fluid within the inlet manifold; receiving an indication of a temperature of the fluid within the inlet manifold; receiving an indication of an atmospheric pressure; receiving an indication of an engine valve opening duration; receiving an indication of an exhaust gas recirculation valve position; and estimating a compressor inlet pressure based on the received indications.
Claim 11
Independent Claim
83 words
A method of estimating performance of a compressor, comprising: receiving an indication of a rotational speed of the power source; receiving an indication of a pressure of a fluid within the inlet manifold; receiving an indication of a temperature of the fluid within the inlet manifold; receiving an indication of an atmospheric pressure; receiving an indication of an engine valve opening duration; receiving an indication of an exhaust gas recirculation valve position; and estimating a compressor inlet pressure based on the received indications.
Claim 12
Dependent Claim
41 words
The method of claim 9 , further including: receiving an indication of an exhaust gas pressure; receiving an indication of an exhaust gas temperature; and determining an exhaust gas density based on the received indications of exhaust gas pressure and temperature.
Claim 13
Dependent Claim
48 words
The method of claim 10 , further including: receiving an indication of an exhaust gas differential pressure associated with an exhaust venturi; and estimating an exhaust gas recirculation mass air flow value based on the received indication of exhaust gas differential pressure and the determined exhaust gas density.
Claim 14
Dependent Claim
113 words
The method of claim 11 , further including: receiving an indication of an atmospheric temperature; estimating a total mass air flow of fluid through the compressor based on: the received indication of an engine valve opening duration; the received indication of a rotational speed of the power source; the received indication of a pressure of a fluid within the inlet manifold; and the provided indication of a temperature of the fluid within the inlet manifold; and estimating a compressor inlet temperature based on: the estimated total mass air flow; the received indication of an atmospheric temperature; the estimated exhaust gas recirculation mass air flow; and the received indication of an exhaust gas temperature.
Claim 15
Dependent Claim
34 words
The method of claim 12 , further including estimating a compressor outlet pressure based on: the total mass air flow; and the received indication of a pressure of a fluid within the inlet manifold.
Claim 16
Dependent Claim
31 words
The method of claim 13 , further including estimating a compressor efficiency based on: the estimated total mass air flow; the estimated compressor outlet pressure; and the estimated compressor inlet pressure.
Claim 17
Dependent Claim
46 words
The method of claim 13 , further including: receiving an indication of a rotational speed of the compressor; and estimating a compressor efficiency based on: the estimated compressor outlet pressure; the estimated compressor inlet pressure; and the received indication of a rotational speed of the compressor.
Claim 18
Dependent Claim
42 words
The method of claim 12 , further including: receiving an indication of a rotational speed of the compressor; and estimating a compressor efficiency based on: the estimated total mass air flow; and the received indication of a rotational speed of the compressor.
Claim 19
Dependent Claim
177 words
A machine, comprising: an engine having variable engine valve timing and an inlet manifold; an air induction system having a compressor configured to supply compressed air through the inlet manifold to the engine; an exhaust recirculation system having a recirculation valve configured to meter exhaust gas to the compressor; an engine speed sensor associated configured to provide an indication of a rotational speed of the engine; an inlet manifold pressure sensor configured to provide an indication of a pressure of a fluid within the inlet manifold; an inlet manifold temperature sensor configured to provide an indication of a temperature of the fluid within the inlet manifold; an atmospheric pressure sensor configured to provide an indication of an atmospheric pressure; and a control module in communication with the inlet manifold pressure, inlet manifold temperature, and atmospheric pressure sensors, the control module being configured to: monitor: an engine valve opening duration; and a position of the recirculation valve; and estimate a compressor inlet pressure based on the provided indications, monitored engine valve opening duration, and monitored recirculation valve position.
Claim 20
Dependent Claim
177 words
A machine, comprising: an engine having variable engine valve timing and an inlet manifold; an air induction system having a compressor configured to supply compressed air through the inlet manifold to the engine; an exhaust recirculation system having a recirculation valve configured to meter exhaust gas to the compressor; an engine speed sensor associated configured to provide an indication of a rotational speed of the engine; an inlet manifold pressure sensor configured to provide an indication of a pressure of a fluid within the inlet manifold; an inlet manifold temperature sensor configured to provide an indication of a temperature of the fluid within the inlet manifold; an atmospheric pressure sensor configured to provide an indication of an atmospheric pressure; and a control module in communication with the inlet manifold pressure, inlet manifold temperature, and atmospheric pressure sensors, the control module being configured to: monitor: an engine valve opening duration; and a position of the recirculation valve; and estimate a compressor inlet pressure based on the provided indications, monitored engine valve opening duration, and monitored recirculation valve position.
Claim 21
Dependent Claim
111 words
The machine of claim 17 , further including: an exhaust gas pressure sensor configured to provide an indication of an exhaust gas pressure; an exhaust gas temperature sensor configured to provide an indication of an exhaust gas temperature; and an exhaust gas differential pressure sensor configured to provide an indication of an exhaust gas differential pressure associated with an exhaust venturi, wherein the control module is further configured to: determine an exhaust gas density based on the provided indications of exhaust gas pressure and temperature; and estimate an exhaust gas recirculation mass air flow value based on the provided indication of exhaust gas differential pressure and the determined exhaust gas density.
Claim 22
Dependent Claim
124 words
The machine of claim 18 , further including an atmospheric temperature sensor configured to provide an indication of an atmospheric temperature, wherein the control module is further configured to: estimate a total mass air flow of fluid through the compressor based on: the monitored engine valve opening duration; the provided indication of a rotational speed of the power source; the provided indication of a pressure of a fluid within the inlet manifold; and the provided indication of a temperature of the fluid within the inlet manifold; and estimate a compressor inlet temperature based on: the estimated total mass air flow; the provided indication of an atmospheric temperature; the estimated exhaust gas recirculation mass air flow; and the provided indication of an exhaust gas temperature.
Claim 23
Dependent Claim
63 words
The machine of claim 19 , wherein the control module is further configured to: estimate a compressor outlet pressure based on: the total mass air flow; and the indication of a pressure of a fluid within the inlet manifold; and estimate a compressor efficiency based on: the estimated total mass air flow; the estimated compressor outlet pressure; and the estimated compressor inlet pressure.
Claim 24
Dependent Claim
83 words
The machine of claim 20 , further including a compressor speed sensor configured to provide an indication of a rotational speed of the compressor, wherein the control module is further configured to: estimate a compressor efficiency based on: the estimated compressor outlet pressure; the estimated compressor inlet pressure; and the provided indication of a rotational speed of the compressor; and estimate a compressor efficiency based on: the estimated total mass air flow; and the provided indication of a rotational speed of the compressor.
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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) | 2010-11-19 | 2011-05-21 | 2011-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-11-19 | 2015-05-21 | 2015-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-11-19 | 2019-05-21 | 2019-11-20 | $7700.00 | Window Closed / Lapsed |