Patent US6732522B2 successfully refreshed from Google Patents.
US6732522B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for estimating engine exhaust pressure
Assignee: Cummins Inc
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Filing: 2002-04-08
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Granted: 2004-05-11
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Expires: 2022-04-08
Abstract
Abstract A system for estimating engine exhaust pressure includes a pressure sensor fluidly coupled to an intake manifold of the engine, a turbocharger having a turbine fluidly coupled to an exhaust manifold of the engine, a control actuator responsive to a control command to control either of a swallowing capacity and a swallowing efficiency of the turbine, and a control computer estimating engine exhaust pressure as a function of the pressure signal and the control command. In an alternate embodiment, the system includes an engine speed sensor, an EGR valve fluidly connected between the intake manifold and the exhaust manifold, and an EGR valve position sensor. The control computer is operable in this embodiment to estimate engine exhaust pressure as a function of the pressure signal, the control command, the engine speed signal and the EGR valve position signal.
Inventors
- 👤 John F. Wright
- 👤 Daniel E. Boewe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:50
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1448; F02D41/145; F02M; F02M26/00; F02M26/02; F02M26/04; F02M26/05; F02B; F02B29/00; F02B29/04; F02B29/0406; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0406; F02M26/09; F02M26/10; F02M26/13; F02M26/22; F02M26/23; F02M26/45; F02M26/46; F02M26/47; F02M26/48
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
97 words
System for estimating engine exhaust pressure, comprising: a turbocharger having a compressor fluidly coupled to an intake manifold of the engine via a first conduit, and a turbine fluidly coupled to an exhaust manifold of the engine via a second conduit; means for determining intake air pressure within said first conduit; means responsive to a turbocharger control command for controlling either of a swallowing capacity and a swallowing efficiency of said turbine; and a control computer estimating engine exhaust pressure within said second conduit as a function of said intake air pressure and said turbocharger control command.
Claim 2
Dependent Claim
97 words
System for estimating engine exhaust pressure, comprising: a turbocharger having a compressor fluidly coupled to an intake manifold of the engine via a first conduit, and a turbine fluidly coupled to an exhaust manifold of the engine via a second conduit; means for determining intake air pressure within said first conduit; means responsive to a turbocharger control command for controlling either of a swallowing capacity and a swallowing efficiency of said turbine; and a control computer estimating engine exhaust pressure within said second conduit as a function of said intake air pressure and said turbocharger control command.
Claim 3
Dependent Claim
14 words
The system of claim 1 further including a memory having said function stored therein.
Claim 4
Dependent Claim
54 words
The system of claim 2 wherein said function is an engine exhaust pressure model of the form: EP E =( A*IAP+B )*( C*TCC+D ) wherein EP E is said engine exhaust pressure estimate, IAP is said intake air pressure, TCC is said turbocharger control command, and A, B, C and D are each constants.
Claim 5
Dependent Claim
74 words
The system of claim 1 wherein said means responsive to a turbocharger control command for controlling either of a swallowing capacity and a swallowing efficiency of said turbine includes: means for varying a flow geometry of said turbine; and an actuator responsive to said turbocharger control command to control said means for varying a flow geometry of said turbine, said control computer controlling said swallowing capacity of said turbine via said turbocharger control command.
Claim 6
Dependent Claim
77 words
The system of claim 1 wherein said means responsive to a turbocharger control command for controlling either of a swallowing capacity and a swallowing efficiency of said turbine includes: an exhaust throttle receiving therethrough exhaust gas supplied by said exhaust manifold to said turbine; and an actuator responsive to said turbocharger control command to control exhaust gas flow through said exhaust throttle, said control computer controlling said swallowing capacity of said turbine via said turbocharger control command.
Claim 7
Dependent Claim
86 words
The system of claim 1 wherein said means responsive to a turbocharger control command for controlling either of a swallowing capacity and a swallowing efficiency of said turbine includes: a wastegate valve having an inlet fluidly coupled to said second conduit and an outlet fluidly coupled to ambient; and an actuator responsive to said turbocharger control command to control said wastegate valve to selectively divert engine exhaust away from said turbine, said control computer controlling said swallowing efficiency of said turbine via said turbocharger control command.
Claim 8
Dependent Claim
109 words
The system of claim 1 further including: an engine speed sensor producing an engine speed signal indicative of engine rotational speed; an EGR valve fluidly connected at one end to said first conduit and at an opposite end to said second conduit, said EGR valve configured to control a flow of recirculated exhaust gas from said exhaust manifold to said intake manifold; and a position sensor producing a position signal indicative of a position of said EGR valve relative to a reference position; and wherein said control computer is operable to estimate said engine exhaust pressure further as a function of said engine speed signal and said position signal.
Claim 9
Dependent Claim
14 words
The system of claim 7 further including a memory having said function stored therein.
Claim 10
Dependent Claim
62 words
The system of claim 8 wherein said function is an engine exhaust pressure model of the form: EP E =A+B*IAP+C*TCC+D*ES+E*EGRP wherein EP E is said engine exhaust pressure estimate, IAP is said intake air pressure, TCC is said turbocharger control command, ES is said engine speed signal, EGRP is said position signal, and A, B, C, D and E are each constants.
Claim 11
Dependent Claim
74 words
The system of claim 7 wherein said means responsive to a turbocharger control command for controlling either of a swallowing capacity and a swallowing efficiency of said turbine includes: means for varying a flow geometry of said turbine; and an actuator responsive to said turbocharger control command to control said means for varying a flow geometry of said turbine, said control computer controlling said swallowing capacity of said turbine via said turbocharger control command.
Claim 12
Dependent Claim
77 words
The system of claim 7 wherein said means responsive to a turbocharger control command for controlling either of a swallowing capacity and a swallowing efficiency of said turbine includes: an exhaust throttle receiving therethrough exhaust gas supplied by said exhaust manifold to said turbine; and an actuator responsive to said turbocharger control command to control exhaust gas flow through said exhaust throttle, said control computer controlling said swallowing capacity of said turbine via said turbocharger control command.
Claim 13
Dependent Claim
86 words
The system of claim 7 wherein said means responsive to a turbocharger control command for controlling either of a swallowing capacity and a swallowing efficiency of said turbine includes: a wastegate valve having an inlet fluidly coupled to said second conduit and an outlet fluidly coupled to ambient; and an actuator responsive to said turbocharger control command to control said wastegate valve to selectively divert engine exhaust away from said turbine, said control computer controlling said swallowing efficiency of said turbine via said turbocharger control command.
Claim 14
Independent Claim
79 words
A method of estimating engine exhaust pressure, comprising the steps of: determining an intake air pressure corresponding to pressure of air supplied by a turbocharger compressor to an intake manifold of the engine; determining a turbocharger control command corresponding to a command for controlling either of a swallowing capacity and a swallowing efficiency of a turbocharger turbine coupled to said compressor; and estimating engine exhaust pressure as a function of said intake air pressure and said turbocharger control command.
Claim 15
Independent Claim
79 words
A method of estimating engine exhaust pressure, comprising the steps of: determining an intake air pressure corresponding to pressure of air supplied by a turbocharger compressor to an intake manifold of the engine; determining a turbocharger control command corresponding to a command for controlling either of a swallowing capacity and a swallowing efficiency of a turbocharger turbine coupled to said compressor; and estimating engine exhaust pressure as a function of said intake air pressure and said turbocharger control command.
Claim 16
Dependent Claim
54 words
The method of claim 13 wherein said function is an engine exhaust pressure model of the form: EP E =( A*IAP+B )*( C*TCC+D ) wherein EP E is said engine exhaust pressure estimate, IAP is said intake air pressure, TCC is said turbocharger control command, and A, B, C and D are each constants.
Claim 17
Dependent Claim
34 words
The method of claim 13 wherein a variable geometry turbocharger actuator is responsive to said turbocharger control command to control said swallowing capacity of said turbine by controlling a flow geometry of said turbine.
Claim 18
Dependent Claim
36 words
The method of claim 13 wherein an exhaust throttle actuator is responsive to said turbocharger control command to control said swallowing capacity of said turbine by controlling a flow rate of engine exhaust through said turbine.
Claim 19
Dependent Claim
34 words
The method of claim 13 wherein a wastegate valve actuator is responsive to said turbocharger control command to control said swallowing efficiency of said turbine by controllably diverting engine exhaust away from said turbine.
Claim 20
Dependent Claim
77 words
The method of claim 13 further including the steps of: determining an engine speed corresponding to rotational speed of the engine; and determining an EGR valve position corresponding to a position of an EGR valve, fluidly coupled between the intake manifold and an exhaust manifold of the engine, relative to a reference position; and wherein the estimating step includes estimating said engine exhaust pressure further as a function of said engine speed and said EGR valve position.
Claim 21
Dependent Claim
62 words
The method of claim 18 wherein said function is an engine exhaust pressure model of the form: EP E =A+B*IAP+C*TCC+D*ES+E*EGRP wherein EP E is said engine exhaust pressure estimate, IAP is said intake air pressure, TCC is said turbocharger control command, ES is said engine speed, EGRP is said EGR valve position, and A, B, C, D and E are each constants.
Claim 22
Dependent Claim
34 words
The method of claim 18 wherein a variable geometry turbocharger actuator is responsive to said turbocharger control command to control said swallowing capacity of said turbine by controlling a flow geometry of said turbine.
Claim 23
Dependent Claim
36 words
The method of claim 18 wherein an exhaust throttle actuator is responsive to said turbocharger control command to control said swallowing capacity of said turbine by controlling a flow rate of engine exhaust through said turbine.
Claim 24
Dependent Claim
34 words
The method of claim 18 wherein a wastegate valve actuator is responsive to said turbocharger control command to control said swallowing efficiency of said turbine by controllably diverting engine exhaust away from said turbine.
Claim 25
Dependent Claim
97 words
System for estimating engine exhaust pressure, comprising: a turbocharger having a compressor fluidly coupled to an intake manifold of the engine via a first conduit, and a turbine fluidly coupled to an exhaust manifold of the engine via a second conduit; a pressure sensor producing a pressure signal indicative of air pressure within said first conduit; a variable geometry turbocharger actuator responsive to a control command to control a flow geometry of said turbine; and a control computer estimating engine exhaust pressure within said second conduit as a function of said pressure signal and said control command.
Claim 26
Dependent Claim
97 words
System for estimating engine exhaust pressure, comprising: a turbocharger having a compressor fluidly coupled to an intake manifold of the engine via a first conduit, and a turbine fluidly coupled to an exhaust manifold of the engine via a second conduit; a pressure sensor producing a pressure signal indicative of air pressure within said first conduit; a variable geometry turbocharger actuator responsive to a control command to control a flow geometry of said turbine; and a control computer estimating engine exhaust pressure within said second conduit as a function of said pressure signal and said control command.
Claim 27
Dependent Claim
14 words
The system of claim 23 further including a memory having said function stored therein.
Claim 28
Dependent Claim
52 words
The system of claim 24 wherein said function is an engine exhaust pressure model of the form: EP E =( A*P+B )*( C*CC+D ) wherein EP E is said engine exhaust pressure estimate, P is said pressure signal, CC is said control command, and A, B, C and D are each constants.
Claim 29
Dependent Claim
109 words
The system of claim 23 further including: an engine speed sensor producing an engine speed signal indicative of engine rotational speed; an EGR valve fluidly connected at one end to said first conduit and at an opposite end to said second conduit, said EGR valve configured to control a flow of recirculated exhaust gas from said exhaust manifold to said intake manifold; and a position sensor producing a position signal indicative of a position of said EGR valve relative to a reference position; and wherein said control computer is operable to estimate said engine exhaust pressure further as a function of said engine speed signal and said position signal.
Claim 30
Dependent Claim
14 words
The system of claim 26 further including a memory having said function stored therein.
Claim 31
Dependent Claim
60 words
The system of claim 27 wherein said function is an engine exhaust pressure model of the form: EP E =A+B*P+C*CC+D*ES+E*EGRP wherein EP E is said engine exhaust pressure estimate, P is said pressure signal, CC is said control command, ES is said engine speed signal, EGRP is said position signal, and A, B, C, D and E are each constants.
Claim 32
Dependent Claim
110 words
System for estimating engine exhaust pressure, comprising: a turbocharger having a compressor fluidly coupled to an intake manifold of the engine via a first conduit, and a turbine fluidly coupled to an exhaust manifold of the engine via a second conduit; a pressure sensor producing a pressure signal indicative of air pressure within said first conduit; an exhaust throttle receiving engine exhaust therethrough; an actuator responsive to a control command to control a flow rate of engine exhaust through said exhaust throttle and thereby through said turbine; and a control computer estimating engine exhaust pressure within said second conduit as a function of said pressure signal and said control command.
Claim 33
Dependent Claim
110 words
System for estimating engine exhaust pressure, comprising: a turbocharger having a compressor fluidly coupled to an intake manifold of the engine via a first conduit, and a turbine fluidly coupled to an exhaust manifold of the engine via a second conduit; a pressure sensor producing a pressure signal indicative of air pressure within said first conduit; an exhaust throttle receiving engine exhaust therethrough; an actuator responsive to a control command to control a flow rate of engine exhaust through said exhaust throttle and thereby through said turbine; and a control computer estimating engine exhaust pressure within said second conduit as a function of said pressure signal and said control command.
Claim 34
Dependent Claim
14 words
The system of claim 29 further including a memory having said function stored therein.
Claim 35
Dependent Claim
52 words
The system of claim 30 wherein said function is an engine exhaust pressure model of the form: EP E =( A*P+B )*( C*CC+D ) wherein EP E is said engine exhaust pressure estimate, P is said pressure signal, CC is said control command, and A, B, C and D are each constants.
Claim 36
Dependent Claim
109 words
The system of claim 29 further including: an engine speed sensor producing an engine speed signal indicative of engine rotational speed; an EGR valve fluidly connected at one end to said first conduit and at an opposite end to said second conduit, said EGR valve configured to control a flow of recirculated exhaust gas from said exhaust manifold to said intake manifold; and a position sensor producing a position signal indicative of a position of said EGR valve relative to a reference position; and wherein said control computer is operable to estimate said engine exhaust pressure further as a function of said engine speed signal and said position signal.
Claim 37
Dependent Claim
14 words
The system of claim 32 further including a memory having said function stored therein.
Claim 38
Dependent Claim
60 words
The system of claim 33 wherein said function is an engine exhaust pressure model of the form: EP E =A+B*P+C*CC+D*ES+E*EGRP wherein EP E is said engine exhaust pressure estimate, P is said pressure signal, CC is said control command, ES is said engine speed signal, EGRP is said position signal, and A, B, C, D and E are each constants.
Claim 39
Dependent Claim
117 words
System for estimating engine exhaust pressure, comprising: a turbocharger having a compressor fluidly coupled to an intake manifold of the engine via a first conduit, and a turbine fluidly coupled to an exhaust manifold of the engine via a second conduit; a pressure sensor producing a pressure signal indicative of air pressure within said first conduit; a wastegate valve having an inlet fluidly coupled to said second conduit and an outlet fluidly coupled to ambient; an actuator responsive to a control command control said wastegate to selectively divert engine exhaust away from said turbine; and a control computer estimating engine exhaust pressure within said second conduit as a function of said pressure signal and said control command.
Claim 40
Dependent Claim
117 words
System for estimating engine exhaust pressure, comprising: a turbocharger having a compressor fluidly coupled to an intake manifold of the engine via a first conduit, and a turbine fluidly coupled to an exhaust manifold of the engine via a second conduit; a pressure sensor producing a pressure signal indicative of air pressure within said first conduit; a wastegate valve having an inlet fluidly coupled to said second conduit and an outlet fluidly coupled to ambient; an actuator responsive to a control command control said wastegate to selectively divert engine exhaust away from said turbine; and a control computer estimating engine exhaust pressure within said second conduit as a function of said pressure signal and said control command.
Claim 41
Dependent Claim
14 words
The system of claim 35 further including a memory having said function stored therein.
Claim 42
Dependent Claim
52 words
The system of claim 36 wherein said function is an engine exhaust pressure model of the form: EP E =( A*P+B )*( C*CC+D ) wherein EP E is said engine exhaust pressure estimate, P is said pressure signal, CC is said control command, and A, B, C and D are each constants.
Claim 43
Dependent Claim
109 words
The system of claim 35 further including: an engine speed sensor producing an engine speed signal indicative of engine rotational speed; an EGR valve fluidly connected at one end to said first conduit and at an opposite end to said second conduit, said EGR valve configured to control a flow of recirculated exhaust gas from said exhaust manifold to said intake manifold; and a position sensor producing a position signal indicative of a position of said EGR valve relative to a reference position; and wherein said control computer is operable to estimate said engine exhaust pressure further as a function of said engine speed signal and said position signal.
Claim 44
Dependent Claim
14 words
The system of claim 38 further including a memory having said function stored therein.
Claim 45
Dependent Claim
60 words
The system of claim 39 wherein said function is an engine exhaust pressure model of the form: EP E =A+B*P+C*CC+D*ES+E*EGRP wherein EP E is said engine exhaust pressure estimate, P is said pressure signal, CC is said control command, ES is said engine speed signal, EGRP is said position signal, and A, B, C, D and E are each constants.
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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) | 2007-05-11 | 2007-11-10 | 2008-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-05-11 | 2011-11-10 | 2012-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-05-11 | 2015-11-10 | 2016-05-11 | $7700.00 | Window Closed / Lapsed |