US6568173B1
Expired / Lapsed
US
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Control method for turbocharged diesel engine aftertreatment system
Assignee: Ford Global Technologies LLC
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Filing: 2000-08-02
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Granted: 2003-05-27
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Expires: 2020-08-02
Abstract
Abstract A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source. The turbocharger includes a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold. The method comprises the steps of determining an operating mode of the exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode. The method then determines a charge value associated with the power source, and engages the power source to the power-assisted turbocharger as a function of the charge value and the operating mode of the exhaust gas aftertreatment system. In one aspect of the invention, negative power is applied to the power-assisted turbocharger to increase the exhaust gas temperature to achieve particulate filter light-off. In another aspect, positive power is applied to the power-assisted turbocharger to reduce turbo-lag or engine pumping losses. In another aspect, negative or positive power is applied to the power-assisted turbocharger to maintain a desired oxygen flow through the particulate filter.
Inventors
- 👤 Ilya Vladimir Kolmanovsky
- 👤 Anna G. Stefanopoulou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:50
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2046; F01N3/02; F01N3/021; F01N3/023; F01N3/033; F01N3/035; F02; F02B; F02B37/00; F02B37/12; F02B37/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
94 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an exhaust gas temperature value; determining a charge value associated with said power source; and engaging said power source to said power-assisted turbocharger as a function of said charge value to drive said exhaust gas temperature value toward a desired exhaust gas temperature value.
Claim 2
Independent Claim
94 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an exhaust gas temperature value; determining a charge value associated with said power source; and engaging said power source to said power-assisted turbocharger as a function of said charge value to drive said exhaust gas temperature value toward a desired exhaust gas temperature value.
Claim 3
Independent Claim
109 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an exhaust gas temperature value; determining a charge value associated with said power source including comparing said charge value to a maximum charge value and a minimum charge value; and engaging said power source to said power-assisted turbocharger as a function of said charge value to drive said exhaust gas temperature value toward a desired exhaust gas temperature value.
Claim 4
Independent Claim
109 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an exhaust gas temperature value; determining a charge value associated with said power source including comparing said charge value to a maximum charge value and a minimum charge value; and engaging said power source to said power-assisted turbocharger as a function of said charge value to drive said exhaust gas temperature value toward a desired exhaust gas temperature value.
Claim 5
Dependent Claim
51 words
The method of claim 2 wherein the step of engaging said power source includes the step of applying a negative power to said power-assisted turbocharger when said exhaust gas temperature value is less than said desired exhaust gas temperature value and said charge value is less than said maximum charge value.
Claim 6
Dependent Claim
67 words
The method of claim 2 further comprising the step of engaging said power source to said power-assisted turbocharger as a function of an exhaust gas air/fuel ratio and a desired exhaust gas air/fuel ratio when said exhaust gas temperature value is greater than said desired exhaust gas temperature value and said charge value is greater than said minimum charge value and less than said maximum charge value.
Claim 7
Dependent Claim
66 words
The method of claim 2 further comprising the steps of comparing a fueling rate value to a fueling limit value and, when said fueling rate value is greater than said fueling limit value and said charge value is greater than said minimum charge value, applying a positive power to said power-assisted turbocharger as a function of said fueling rate value and said fueling rate limit value.
Claim 8
Dependent Claim
70 words
The method of claim 5 further comprising the steps of determining a pressure drop value from said exhaust manifold to said intake manifold and when said pressure drop value is greater than a critical pressure drop value and said charge value is less than said maximum charge value, applying a negative power to said power-assisted turbocharger as a function of said pressure drop value and said critical pressure drop value.
Claim 9
Dependent Claim
36 words
The method of claim 6 further comprising the step of applying power to said power-assisted turbocharger as a function of said charge value when said power drop value is greater than said critical pressure drop value.
Claim 10
Independent Claim
109 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and engaging said power source to said power-assisted turbocharger as a function of said charge value and said operating mode of said exhaust gas aftertreatment system.
Claim 11
Independent Claim
109 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and engaging said power source to said power-assisted turbocharger as a function of said charge value and said operating mode of said exhaust gas aftertreatment system.
Claim 12
Independent Claim
136 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and determining an exhaust gas temperature value; and comparing said charge value to a maximum charge value and when said exhaust gas temperature value is less than a desired exhaust gas temperature value and said charge value is less than said maximum charge value, applying a maximum negative power to said power-assisted turbocharger.
Claim 13
Independent Claim
136 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and determining an exhaust gas temperature value; and comparing said charge value to a maximum charge value and when said exhaust gas temperature value is less than a desired exhaust gas temperature value and said charge value is less than said maximum charge value, applying a maximum negative power to said power-assisted turbocharger.
Claim 14
Independent Claim
143 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and when said exhaust gas aftertreatment system is in said regeneration mode, comparing said charge value to a maximum and minimum charge value and engaging said power source to said power-assisted turbocharger as a function of an exhaust gas air/fuel ratio and a desired exhaust gas air/fuel ratio when said charge value is between said minimum and maximum charge values.
Claim 15
Independent Claim
143 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and when said exhaust gas aftertreatment system is in said regeneration mode, comparing said charge value to a maximum and minimum charge value and engaging said power source to said power-assisted turbocharger as a function of an exhaust gas air/fuel ratio and a desired exhaust gas air/fuel ratio when said charge value is between said minimum and maximum charge values.
Claim 16
Independent Claim
161 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and when said exhaust gas aftertreatment system is in said storage mode, comparing a fueling rate value to a fueling limit value and comparing said charge value to a minimum charge value and, when said fueling rate value is greater than said fueling limit value and said charge value is greater than said minimum charge value, applying a positive power to said power-assisted turbocharger as a function of said fueling rate value and said fueling rate limit value.
Claim 17
Independent Claim
161 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and when said exhaust gas aftertreatment system is in said storage mode, comparing a fueling rate value to a fueling limit value and comparing said charge value to a minimum charge value and, when said fueling rate value is greater than said fueling limit value and said charge value is greater than said minimum charge value, applying a positive power to said power-assisted turbocharger as a function of said fueling rate value and said fueling rate limit value.
Claim 18
Independent Claim
187 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and when said exhaust gas aftertreatment system is in said storage mode, comparing a fueling rate value to a fueling limit value, comparing said charge value to a maximum charge value, and determining a pressure drop value from said exhaust manifold to said intake manifold, and when said fueling rate value is less than said fueling limit value and said pressure drop value is greater than a critical pressure drop value and said charge value is less than said maximum charge value, applying a negative power to said power-assisted turbocharger as a function of said pressure drop value and said critical pressure drop value.
Claim 19
Independent Claim
187 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and when said exhaust gas aftertreatment system is in said storage mode, comparing a fueling rate value to a fueling limit value, comparing said charge value to a maximum charge value, and determining a pressure drop value from said exhaust manifold to said intake manifold, and when said fueling rate value is less than said fueling limit value and said pressure drop value is greater than a critical pressure drop value and said charge value is less than said maximum charge value, applying a negative power to said power-assisted turbocharger as a function of said pressure drop value and said critical pressure drop value.
Claim 20
Independent Claim
158 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and when said exhaust gas aftertreatment system is in said storage mode, comparing a fueling rate value to a fueling limit value and determining a pressure drop value from said exhaust manifold to said intake manifold, and when said fueling rate value is less than said fueling limit value and said pressure drop value is less than a critical pressure drop value, applying power to said power-assisted turbocharger as a function of said charge value.
Claim 21
Independent Claim
158 words
A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold, the method comprising the steps of: determining an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determining a charge value associated with said power source; and when said exhaust gas aftertreatment system is in said storage mode, comparing a fueling rate value to a fueling limit value and determining a pressure drop value from said exhaust manifold to said intake manifold, and when said fueling rate value is less than said fueling limit value and said pressure drop value is less than a critical pressure drop value, applying power to said power-assisted turbocharger as a function of said charge value.
Claim 22
Dependent Claim
115 words
A compression ignition engine system comprising; an exhaust gas aftertreatment system including a particulate filter; a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold; and a controller including a microprocessor programmed to perform the following steps: determine an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determine a charge value associated with said power source; and engage said power source to said power-assisted turbocharger as a function of said charge value and said operating mode of said exhaust gas aftertreatment system.
Claim 23
Dependent Claim
115 words
A compression ignition engine system comprising; an exhaust gas aftertreatment system including a particulate filter; a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold; and a controller including a microprocessor programmed to perform the following steps: determine an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determine a charge value associated with said power source; and engage said power source to said power-assisted turbocharger as a function of said charge value and said operating mode of said exhaust gas aftertreatment system.
Claim 24
Dependent Claim
121 words
A compression ignition engine system comprising: an exhaust gas aftertreatment system including a particulate filter and a lean NO x trap; a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold; and a controller including a microprocessor programmed to perform the following steps: determine an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determine a charge value associated with said power source, and engage said power source to said power-assisted turbocharger as a function of said charge value and said operating mode of said exhaust gas aftertreatment system.
Claim 25
Dependent Claim
121 words
A compression ignition engine system comprising: an exhaust gas aftertreatment system including a particulate filter and a lean NO x trap; a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold; and a controller including a microprocessor programmed to perform the following steps: determine an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determine a charge value associated with said power source, and engage said power source to said power-assisted turbocharger as a function of said charge value and said operating mode of said exhaust gas aftertreatment system.
Claim 26
Dependent Claim
17 words
The compression ignition engine system of claim 15 wherein said exhaust gas aftertreatment system includes a heater.
Claim 27
Dependent Claim
171 words
A compression ignition engine system comprising: an exhaust gas aftertreatment system including a particulate filter; an exhaust gas temperature sensor; a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold; and a controller including a microprocessor programmed to perform the following steps: determine an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determine a charge value associated with said power source; engage said power source to said power-assisted turbocharger as a function of said charge value and said operating mode of said exhaust gas aftertreatment system; and determine an exhaust gas temperature value; compare said charge value to a maximum charge value; and when said exhaust gas temperature value is less than a desired exhaust gas temperature value and said charge value is less than said maximum charge value, apply a maximum negative power to said power-assisted turbocharger.
Claim 28
Dependent Claim
171 words
A compression ignition engine system comprising: an exhaust gas aftertreatment system including a particulate filter; an exhaust gas temperature sensor; a power-assisted turbocharger coupled to a power source, said turbocharger including a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold; and a controller including a microprocessor programmed to perform the following steps: determine an operating mode of said exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode; determine a charge value associated with said power source; engage said power source to said power-assisted turbocharger as a function of said charge value and said operating mode of said exhaust gas aftertreatment system; and determine an exhaust gas temperature value; compare said charge value to a maximum charge value; and when said exhaust gas temperature value is less than a desired exhaust gas temperature value and said charge value is less than said maximum charge value, apply a maximum negative power to said power-assisted turbocharger.
Claim 29
Dependent Claim
75 words
The compression ignition system of claim 17 further comprising an exhaust gas air/fuel ratio sensor and wherein said microprocessor is further programmed to perform the following steps: compare said charge value to a maximum and minimum charge value; and engage said power source to said power-assisted turbocharger as a function of an exhaust gas air/fuel ratio and a desired exhaust gas air/fuel ratio when said charge value is between said minimum and maximum charge values.
Claim 30
Dependent Claim
84 words
The compression ignition system of claim 17 wherein said microprocessor is further programmed to perform the following steps: compare a fueling rate value to a fueling limit value and compare said charge value to a minimum charge value and, when said fueling rate value is greater than said fueling limit value and said charge value is greater than said minimum charge value, apply a positive power to said power-assisted turbocharger as a function of said fueling rate value and said fueling rate limit value.
Claim 31
Dependent Claim
115 words
The compression ignition system of claim 17 further comprising an intake manifold pressure sensor for providing an intake manifold pressure value, an exhaust manifold pressure sensor for providing an exhaust manifold pressure value, and wherein said microprocessor is further programmed to perform the following steps: compare a fueling rate value to a fueling limit value and determine a pressure drop value from a difference between said exhaust manifold pressure value and said intake manifold pressure value, and when said fueling rate value is less than said fueling limit value and said pressure drop value is less than a critical pressure drop value, apply power to said power-assisted turbocharger as a function of said charge value.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-05-26 | 2006-11-25 | 2007-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-05-26 | 2010-11-25 | 2011-05-27 | $3760.00 | Window Closed / Lapsed |
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