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US6644020B2
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Device and method for regenerating an exhaust gas aftertreatment device
Assignee: Ford Motor Co
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Filing: 2002-09-25
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Granted: 2003-11-11
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Expires: 2022-09-25
Abstract
Abstract The invention relates to a method for regenerating a particulate filter in the exhaust system of a diesel engine, an increase in the temperature of the exhaust gases being brought about by post-injection of fuel. The intake pressure (MAP) and/or the air mass flow rate (MAF) are reduced as a function of the ambient temperature of the engine and preferably also when the engine load is low by throttling the engine. In this way, the proportions of burned or unburned post-injected fuel can be stabilized.
Inventors
- 👤 Johannes Kuenstler
- 👤 Paul Eduard Moraal
- 👤 Urs Christen
- 👤 Yasser M. Yacoub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:50
CPC Classifications
F; F02; F02D; F02D35/00; F02D35/02; F02D35/025; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/023; F02D33/00; F02D33/02; F02D41/00; F02D41/02; F02D41/021; F02D41/0235; F02D41/024; F02D41/30; F02D41/38; F02D41/40; F02D41/402; F02D41/405; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0414; F02D41/027; F02D41/029; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
104 words
A method for regenerating an exhaust gas aftertreatment device disposed in the exhaust system of an internal combustion engine, the engine having a throttle valve disposed in the engine intake and a fuel injector disposed in a combustion cylinder of the engine configured for multiple injections during a combustion cycle, comprising: injecting fuel into the combustion cylinder at least twice in a single engine cycle, said injections including a main injection followed by a post injection; and regulating a position of the throttle valve to provide a desired value of an exhaust gas parameter wherein said regulation is based on an estimated ambient temperature.
Claim 2
Independent Claim
104 words
A method for regenerating an exhaust gas aftertreatment device disposed in the exhaust system of an internal combustion engine, the engine having a throttle valve disposed in the engine intake and a fuel injector disposed in a combustion cylinder of the engine configured for multiple injections during a combustion cycle, comprising: injecting fuel into the combustion cylinder at least twice in a single engine cycle, said injections including a main injection followed by a post injection; and regulating a position of the throttle valve to provide a desired value of an exhaust gas parameter wherein said regulation is based on an estimated ambient temperature.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said exhaust gas parameter is exhaust gas temperature.
Claim 4
Dependent Claim
41 words
The method of claim 1 wherein a value of intake manifold pressure to provide said desired value of an exhaust gas parameter is determined and said regulation of the throttle valve is based on providing said value of intake manifold pressure.
Claim 5
Dependent Claim
41 words
The method of claim 1 wherein a value of intake mass airflow to provide said desired value of said exhaust gas parameter is determined and said regulation of the throttle valve is based on providing said value of intake mass airflow.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the engine is a diesel engine.
Claim 7
Independent Claim
123 words
A method for regenerating an exhaust gas aftertreatment device disposed in the exhaust system of an internal combustion engine, the engine having a throttle valve disposed in the engine intake and a fuel injector disposed in a combustion cylinder of the engine configured multiple injections during a combustion cycle, comprising: injecting fuel into the combustion cylinder at least twice in a single engine cycle, said injections including a main injection followed by a post injection; and regulating a position of the throttle valve to provide a desired value of an exhaust gas parameter wherein the position of the throttle valve is regulated so that temperature in the combustion cylinder does not drop below a predetermined threshold at the time of said post injection.
Claim 8
Independent Claim
123 words
A method for regenerating an exhaust gas aftertreatment device disposed in the exhaust system of an internal combustion engine, the engine having a throttle valve disposed in the engine intake and a fuel injector disposed in a combustion cylinder of the engine configured multiple injections during a combustion cycle, comprising: injecting fuel into the combustion cylinder at least twice in a single engine cycle, said injections including a main injection followed by a post injection; and regulating a position of the throttle valve to provide a desired value of an exhaust gas parameter wherein the position of the throttle valve is regulated so that temperature in the combustion cylinder does not drop below a predetermined threshold at the time of said post injection.
Claim 9
Dependent Claim
21 words
The method of claim 6 wherein the throttle valve is regulated more toward a closed position when ambient temperature is lower.
Claim 10
Dependent Claim
17 words
The method of claim 6 wherein said regulation is based on a coolant temperature of the engine.
Claim 11
Dependent Claim
21 words
The method of claim 6 wherein the throttle valve is regulated more toward a closed position when coolant temperature is lower.
Claim 12
Dependent Claim
18 words
The method of claim 6 wherein the regulation is discontinued during a demand for a high acceleration rate.
Claim 13
Dependent Claim
122 words
An internal combustion engine, comprising: an exhaust gas aftertreatment device arranged in an engine exhaust; a throttle valve disposed in an engine intake; a fuel injector disposed in each of engine combustion cylinders, said injector providing a main injection followed by a post injection, said injections occurring within a single engine cycle; and an electronic control unit operably connected to the engine, said electronic control unit adjusting a timing of said post injected fuel and a position of said throttle valve to provide a desired value of an exhaust ass parameter wherein said desired value of said exhaust gas parameter leads to regeneration of said exhaust ass aftertreatment device wherein said throttle valve is adjusted to provide a predetermined intake manifold pressure.
Claim 14
Dependent Claim
122 words
An internal combustion engine, comprising: an exhaust gas aftertreatment device arranged in an engine exhaust; a throttle valve disposed in an engine intake; a fuel injector disposed in each of engine combustion cylinders, said injector providing a main injection followed by a post injection, said injections occurring within a single engine cycle; and an electronic control unit operably connected to the engine, said electronic control unit adjusting a timing of said post injected fuel and a position of said throttle valve to provide a desired value of an exhaust ass parameter wherein said desired value of said exhaust gas parameter leads to regeneration of said exhaust ass aftertreatment device wherein said throttle valve is adjusted to provide a predetermined intake manifold pressure.
Claim 15
Dependent Claim
21 words
The engine of claim 11 wherein said predetermined intake manifold pressure decreases as an engine parameter indicative of ambient temperature decreases.
Claim 16
Dependent Claim
18 words
The engine of claim 11 wherein said throttle valve is adjusted to provide a predertermined intake mass airflow.
Claim 17
Dependent Claim
21 words
The engine of claim 13 wherein said predetermined intake mass airflow decreases as an engine parameter indicative of ambient temperature decreases.
Claim 18
Independent Claim
119 words
A method for regenerating a particulate filter disposed in the exhaust system of a diesel engine, the engine having a throttle valve disposed in the engine intake and a fuel injector disposed in a combustion cylinder of the engine configured for multiple injections during a combustion cycle, comprising: injecting fuel into the combustion cylinder at least twice in a single engine cycle, said injections including a main injection followed by a post injection; and determining a desired input value for an engine intake parameter to provide a desired output value of an engine exhaust parameter; basing said desired input value on an estimated ambient temperature; and regulating a position of the throttle valve to provide said desired output value.
Claim 19
Independent Claim
119 words
A method for regenerating a particulate filter disposed in the exhaust system of a diesel engine, the engine having a throttle valve disposed in the engine intake and a fuel injector disposed in a combustion cylinder of the engine configured for multiple injections during a combustion cycle, comprising: injecting fuel into the combustion cylinder at least twice in a single engine cycle, said injections including a main injection followed by a post injection; and determining a desired input value for an engine intake parameter to provide a desired output value of an engine exhaust parameter; basing said desired input value on an estimated ambient temperature; and regulating a position of the throttle valve to provide said desired output value.
Claim 20
Dependent Claim
21 words
The method of claim 15 wherein said exhaust parameter is exhaust gas temperature and said desired output value is a temperature.
Claim 21
Dependent Claim
21 words
The method of claim 15 wherein said exhaust parameter is exhaust gas hydrocarbon concentration and said output value is a concentration.
Claim 22
Dependent Claim
24 words
The method of claim 15 wherein said intake parameter is a mass air flow and said desired input value is a mass flow rate.
Claim 23
Dependent Claim
22 words
The method of claim 15 wherein said intake parameter is a manifold absolute pressure and said desired input value is a pressure.
Claim 24
Dependent Claim
108 words
An internal combustion engine, comprising: an exhaust gas aftertreatment device arranged in an engine exhaust; a throttle valve disposed in an engine intake; a fuel injector disposed in each of engine combustion cylinders, said injector providing a main injection followed by a post injection, said injections occurring within a single engine cycle; and an electronic control unit operably connected to the engine, said electronic control unit adjusting a position of said throttle valve to provide a desired value of an exhaust gas parameter and to provide a predetermined intake manifold pressure wherein said desired value of said exhaust gas parameter leads to regeneration of said exhaust gas aftertreatment.
Claim 25
Dependent Claim
108 words
An internal combustion engine, comprising: an exhaust gas aftertreatment device arranged in an engine exhaust; a throttle valve disposed in an engine intake; a fuel injector disposed in each of engine combustion cylinders, said injector providing a main injection followed by a post injection, said injections occurring within a single engine cycle; and an electronic control unit operably connected to the engine, said electronic control unit adjusting a position of said throttle valve to provide a desired value of an exhaust gas parameter and to provide a predetermined intake manifold pressure wherein said desired value of said exhaust gas parameter leads to regeneration of said exhaust gas aftertreatment.
Claim 26
Dependent Claim
108 words
An internal combustion engine, comprising: an exhaust gas aftertreatment device arranged in an engine exhaust; a throttle valve disposed in an engine intake; a fuel injector disposed in each of engine combustion cylinders, said injector providing a main injection followed by a post injection, said injections occurring within a single engine cycle; and an electronic control unit operably connected to the engine, said electronic control unit adjusting a position of said throttle valve to provide a desired value of an exhaust gas parameter and to provide a predetermined intake mass airflow wherein said desired value of said exhaust gas parameter leads to regeneration of said exhaust gas aftertreatment.
Claim 27
Dependent Claim
108 words
An internal combustion engine, comprising: an exhaust gas aftertreatment device arranged in an engine exhaust; a throttle valve disposed in an engine intake; a fuel injector disposed in each of engine combustion cylinders, said injector providing a main injection followed by a post injection, said injections occurring within a single engine cycle; and an electronic control unit operably connected to the engine, said electronic control unit adjusting a position of said throttle valve to provide a desired value of an exhaust gas parameter and to provide a predetermined intake mass airflow wherein said desired value of said exhaust gas parameter leads to regeneration of said exhaust gas aftertreatment.
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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) | 2006-11-10 | 2007-05-12 | 2007-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-11-10 | 2011-05-12 | 2011-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-11-10 | 2015-05-12 | 2015-11-11 | $7700.00 | Window Closed / Lapsed |