US6209530B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for exhaust gas recirculation system
Assignee: Caterpillar Inc
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Filing: 1998-07-03
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Granted: 2001-04-03
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Expires: 2018-07-03
Abstract
Abstract A system and method for controlling an exhaust gas recirculation system ( 10 ) on an electronically controlled, turbocharger ( 18 ) equipped internal combustion engine ( 12 ) having two or more actuating devices ( 84,86 ). In the disclosed embodiments, the actuating devices ( 84,86 ) may include an exhaust gas recirculation valve ( 40 ), a turbocharger back pressure valve ( 44 ), the vane actuators ( 46 ) in a variable geometry turbocharger ( 48 ), or an air intake throttle valve.
Inventors
- 👤 James J. Faletti
- 👤 Alois Amstutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:18
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0025; F02D41/0047; F02D41/005; F02D41/0052; F02B; F02B33/00; F02B33/32; F02B33/42; F02B37/00; F02B37/12; F02B37/18; F02B37/22; F02B37/225; F02M; F02M26/00; F02M26/13; F02M26/22; F02M26/23; F02M26/25; F02M26/02; F02M26/04; F02M26/05; F02M26/33; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
264 words
A control system ( 81 ) for an exhaust gas recirculation system ( 10 ) having two or more actuating devices, said control system ( 81 ) comprising: an engine controller ( 80 ) adapted for receiving two or more engine operating parameter inputs ( 88 , 90 ) and providing two or more actuator control output signals ( 108 , 132 ); a first actuator ( 84 ) coupled to said engine controller ( 80 ) and having an input for receiving a first actuator control output signal ( 108 ) from said engine controller ( 80 ), said first actuator ( 84 ) further connected to a first actuating device of said exhaust gas recirculation system ( 10 ) and adapted for controlling said first actuating device in response to said first actuator control output signal ( 108 ); a second actuator ( 86 ) coupled to said engine controller ( 80 ) and having an input for receiving a second actuator control output signal ( 132 ) from said engine controller ( 80 ), said second actuator ( 86 ) further connected to a second actuating device of said exhaust gas recirculation system ( 10 ) and adapted for controlling said second actuating device in response to said second actuator control output signal ( 132 ); and wherein said engine controller ( 80 ) is adapted to generate said second actuator control output signal ( 132 ) based on said engine operating parameter inputs ( 88 , 90 ) and said control signals associated with said first actuator ( 84 ).
Claim 2
Dependent Claim
264 words
A control system ( 81 ) for an exhaust gas recirculation system ( 10 ) having two or more actuating devices, said control system ( 81 ) comprising: an engine controller ( 80 ) adapted for receiving two or more engine operating parameter inputs ( 88 , 90 ) and providing two or more actuator control output signals ( 108 , 132 ); a first actuator ( 84 ) coupled to said engine controller ( 80 ) and having an input for receiving a first actuator control output signal ( 108 ) from said engine controller ( 80 ), said first actuator ( 84 ) further connected to a first actuating device of said exhaust gas recirculation system ( 10 ) and adapted for controlling said first actuating device in response to said first actuator control output signal ( 108 ); a second actuator ( 86 ) coupled to said engine controller ( 80 ) and having an input for receiving a second actuator control output signal ( 132 ) from said engine controller ( 80 ), said second actuator ( 86 ) further connected to a second actuating device of said exhaust gas recirculation system ( 10 ) and adapted for controlling said second actuating device in response to said second actuator control output signal ( 132 ); and wherein said engine controller ( 80 ) is adapted to generate said second actuator control output signal ( 132 ) based on said engine operating parameter inputs ( 88 , 90 ) and said control signals associated with said first actuator ( 84 ).
Claim 3
Dependent Claim
23 words
The control system ( 81 ) of claim 1 wherein said first actuating device is an exhaust gas recirculation valve ( 40 ).
Claim 4
Dependent Claim
23 words
The control system ( 81 ) of claim 2 wherein said second actuating device is operatively associated with a turbocharger ( 18 ).
Claim 5
Dependent Claim
23 words
The control system ( 81 ) of claim 2 wherein said second actuating device is a turbocharger back pressure valve ( 44 ).
Claim 6
Dependent Claim
29 words
The control system ( 81 ) of claim 2 wherein said second actuating device is a vane actuator ( 46 ) for a variable geometry turbocharger ( 48 ).
Claim 7
Dependent Claim
23 words
The control system ( 81 ) of claim 2 wherein said second actuating device ( 86 ) is an air intake throttle valve.
Claim 8
Dependent Claim
54 words
The control system ( 81 ) of claim 1 wherein said engine controller ( 80 ) includes a processor and wherein said processor is adapted for generating a target position ( 87 ) for said first actuator ( 84 ) based on said engine operating parameter inputs ( 88 , 90 , 98 ).
Claim 9
Dependent Claim
46 words
The control system ( 81 ) of claim 7 wherein said processor is further adapted for generating a first actuator command signal ( 104 ) based on said target position ( 87 ) and said engine operating parameter inputs ( 88 , 90 , 98 ).
Claim 10
Dependent Claim
69 words
The control system ( 81 ) of claim 8 wherein said processor is further adapted for generating prescribed actuator limits ( 107 ) based on said engine operating parameter inputs ( 88 , 90 , 98 ), and wherein said prescribed actuator limits ( 107 ) are used to adjust said first actuator command signal ( 104 ) to yield said first actuator control output signal ( 108 ).
Claim 11
Dependent Claim
41 words
The control system ( 81 ) of claim 1 wherein said processor is further adapted for generating a target position ( 122 ) for said second actuator ( 86 ) based on said engine operating parameter inputs( 88 , 90 ).
Claim 12
Dependent Claim
70 words
The control system ( 81 ) of claim 10 wherein said processor is further adapted for generating prescribed actuator limits ( 130 ) for said second actuator ( 86 ) based on said engine operating parameter inputs ( 88 , 90 ), and wherein said prescribed actuator limits ( 130 ) for said second actuator ( 86 ) are used to adjust said second actuator control output signal( 132 ).
Claim 13
Independent Claim
146 words
A method of controlling an exhaust gas recirculation system ( 10 ) in a turbocharged engine ( 12 ) having two or more cooperatively controlled actuating devices, said method comprising the steps of: receiving two or more engine operating parameter inputs ( 88 , 90 ) producing a first actuator command signal in response to said engine operating parameter inputs; producing a first actuator control output signal in response to said first actuator command signal and one or more first actuator signal limits wherein said first actuator signal limits are determined based on said engine operating parameter inputs; controlling a first actuator in response to said first actuator control output signal; producing a second actuator control output signal in response to said first actuator control signal and said engine operating parameter inputs; and controlling a second actuator in response to said second actuator control output signal.
Claim 14
Independent Claim
146 words
A method of controlling an exhaust gas recirculation system ( 10 ) in a turbocharged engine ( 12 ) having two or more cooperatively controlled actuating devices, said method comprising the steps of: receiving two or more engine operating parameter inputs ( 88 , 90 ) producing a first actuator command signal in response to said engine operating parameter inputs; producing a first actuator control output signal in response to said first actuator command signal and one or more first actuator signal limits wherein said first actuator signal limits are determined based on said engine operating parameter inputs; controlling a first actuator in response to said first actuator control output signal; producing a second actuator control output signal in response to said first actuator control signal and said engine operating parameter inputs; and controlling a second actuator in response to said second actuator control output signal.
Claim 15
Dependent Claim
32 words
The method of controlling an exhaust gas recirculation system ( 10 ) as set forth in claim 12 wherein said first actuating device is an exhaust gas recirculation valve ( 40 ).
Claim 16
Dependent Claim
32 words
The method of controlling an exhaust gas recirculation system ( 10 ) as set forth in claim 12 wherein said second actuating device is operatively associated with a turbocharger ( 18 ).
Claim 17
Dependent Claim
32 words
The method of controlling an exhaust gas recirculation system ( 10 ) as set forth in claim 12 wherein said second actuating device is a turbocharger back pressure valve ( 44 ).
Claim 18
Dependent Claim
38 words
The method of controlling an exhaust gas recirculation system ( 10 ) as set forth in claim 12 wherein said second actuating device is a vane actuator ( 46 ) for a variable geometry turbocharger ( 48 ).
Claim 19
Dependent Claim
29 words
The method of controlling an exhaust gas recirculation system ( 10 ) as set forth in claim 12 wherein said second actuating device is an intake air throttle valve.
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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) | 2004-04-02 | 2004-10-02 | 2005-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-04-02 | 2008-10-02 | 2009-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-04-02 | 2012-10-02 | 2013-04-03 | $7700.00 | Window Closed / Lapsed |