US6314359B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for modifying a load bias function based on transient engine operation
Assignee: Cummins Inc
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Filing: 2000-05-30
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Granted: 2001-11-06
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Expires: 2020-05-30
Abstract
Abstract The present invention relates to a system for controlling loading of an internal combustion engine based on a an adjusted load bias signal produced by an engine control computer. The engine control computer is responsive to engine speed and commanded fueling to produce a load bias signal, is responsive to engine speed, engine intake air pressure and the load bias signal to produce an acceleration-adjusted load bias value, and is responsive to engine speed, a reference engine speed and the load 10 bias signal to produce a deceleration-adjusted load bias value. The engine control computer is thereafter operable to compare the load bias value, the acceleration-adjusted load bias value and the deceleration-adjusted load bias value and produce the adjusted load bias signal as one of these three signals based on a comparison therebetween. The adjusted load bias signal is provided to an external load generator operable to control loading of the engine based thereon. Improper loading of the engine is avoided with the present invention by accounting for transient engine operation involving engine acceleration and deceleration conditions.
Inventors
- 👤 Dusan M. Janic
- 👤 Michael J. McGuire
- 👤 Howard E. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:03
CPC Classifications
F; F02; F02D; F02D31/00; F02D31/001; F02D31/007; F02D41/00; F02D41/02; F02D41/04; F02D41/10; F02D41/107; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0406
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
107 words
A system for producing an adjusted load bias signal to provide for optimal acceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for sensing intake air pressure of an internal combustion engine and producing a boost pressure signal corresponding thereto; means for determining a load bias signal as a function of said engine speed signal; and means for producing an adjusted load bias signal as one of said load bias signal and an acceleration-adjusted load bias signal, said acceleration-adjusted load bias signal based on said boost pressure signal and said engine speed signal.
Claim 2
Independent Claim
107 words
A system for producing an adjusted load bias signal to provide for optimal acceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for sensing intake air pressure of an internal combustion engine and producing a boost pressure signal corresponding thereto; means for determining a load bias signal as a function of said engine speed signal; and means for producing an adjusted load bias signal as one of said load bias signal and an acceleration-adjusted load bias signal, said acceleration-adjusted load bias signal based on said boost pressure signal and said engine speed signal.
Claim 3
Dependent Claim
21 words
The system of claim 1 further including means responsive to said adjusted load bias signal for controlling loading of said engine.
Claim 4
Dependent Claim
47 words
The system of claim 1 further including a fuel system responsive to a fueling command to supply fuel to said engine; and wherein said means for determining said load bias value is further operable to determine said load bias value as a function of said fueling command.
Claim 5
Dependent Claim
24 words
The system of claim 1 further including a turbocharger operable to supply supplemental intake air flow to an air intake port of said engine.
Claim 6
Dependent Claim
68 words
The system of claim 1 wherein said means for producing an adjusted load bias signal includes: means for determining an optimal rate of change of engine RPM as a function of said engine speed signal and of said boost pressure signal; and means for producing said acceleration-adjusted load bias signal as a function of said optimal rate of change of engine RPM and of said load bias signal.
Claim 7
Dependent Claim
42 words
The system of claim 4 wherein said means for producing an adjusted load bias signal includes means for producing said adjusted load bias signal as one of said load bias signal and said acceleration-adjusted load bias signal based on a comparison therebetween.
Claim 8
Independent Claim
86 words
A method of producing an adjusted load bias signal to provide or optimal acceleration conditions for an internal combustion engine, the method comprising the steps of: sensing engine rotational speed; sensing engine intake air pressure; determining a load bias signal as a function of said engine rotational speed; determining an acceleration-adjusted load bias signal based on said engine rotational speed and said engine intake air pressure; and producing an adjusted load bias signal as one of said load bias signal and said acceleration-adjusted load bias signal.
Claim 9
Independent Claim
86 words
A method of producing an adjusted load bias signal to provide or optimal acceleration conditions for an internal combustion engine, the method comprising the steps of: sensing engine rotational speed; sensing engine intake air pressure; determining a load bias signal as a function of said engine rotational speed; determining an acceleration-adjusted load bias signal based on said engine rotational speed and said engine intake air pressure; and producing an adjusted load bias signal as one of said load bias signal and said acceleration-adjusted load bias signal.
Claim 10
Dependent Claim
22 words
The method of claim 7 further including the step of controlling loading of said engine based on said adjusted load bias signal.
Claim 11
Dependent Claim
45 words
The method of claim 7 further including the step of supplying fuel to an internal combustion engine based on a fueling command; and wherein the step of determining a load bias signal includes determining said load bias signal as a function of said fueling command.
Claim 12
Dependent Claim
60 words
The method of claim 7 wherein the step of determining an acceleration-adjusted load bias signal includes the steps of: determining an optimal rate of change of engine RPM based on said engine rotational speed and said engine intake air pressure; and determining said acceleration-adjusted load bias signal based on said optimal rate-of-change of engine RPM and said load bias signal.
Claim 13
Dependent Claim
44 words
The method of claim 10 wherein the step of producing an adjusted load bias signal includes the step of producing said load adjusted load bias signal as one of said load bias signal and said acceleration-adjusted load bias signal based on a comparison therebetween.
Claim 14
Independent Claim
107 words
A system for producing an adjusted load bias signal to provide for optimal acceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for sensing intake air pressure of an internal combustion engine and producing a boost pressure signal corresponding thereto; and a control computer computing a load bias signal based on said engine speed signal, said control computer computing an acceleration-adjusted load bias signal based on said engine speed and boost pressure signals and producing an adjusted load bias signal as one of said load bias signal and said acceleration-adjusted load bias signal.
Claim 15
Independent Claim
107 words
A system for producing an adjusted load bias signal to provide for optimal acceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for sensing intake air pressure of an internal combustion engine and producing a boost pressure signal corresponding thereto; and a control computer computing a load bias signal based on said engine speed signal, said control computer computing an acceleration-adjusted load bias signal based on said engine speed and boost pressure signals and producing an adjusted load bias signal as one of said load bias signal and said acceleration-adjusted load bias signal.
Claim 16
Dependent Claim
23 words
The system of claim 12 further including a load generator responsive to said adjusted load bias signal to control loading of said engine.
Claim 17
Independent Claim
95 words
A system for producing an adjusted load bias signal to provide for optimal deceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for determining a reference engine speed; means for determining a load bias signal as a function of said engine speed signal; and means for producing an adjusted load bias signal as one of said load bias signal and a deceleration-adjusted load bias signal, said deceleration-adjusted load bias signal based on said engine speed signal and said reference engine speed.
Claim 18
Independent Claim
95 words
A system for producing an adjusted load bias signal to provide for optimal deceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for determining a reference engine speed; means for determining a load bias signal as a function of said engine speed signal; and means for producing an adjusted load bias signal as one of said load bias signal and a deceleration-adjusted load bias signal, said deceleration-adjusted load bias signal based on said engine speed signal and said reference engine speed.
Claim 19
Dependent Claim
21 words
The system of claim 14 further including means responsive to said adjusted load bias signal for controlling loading of said engine.
Claim 20
Dependent Claim
47 words
The system of claim 14 further including a fuel system responsive to a fueling command to supply fuel to said engine; and wherein said means for determining said load bias value is further operable to determine said load bias value as a function of said fueling command.
Claim 21
Dependent Claim
28 words
The system of claim 14 further including means responsive to operator actuation for producing a requested torque signal, said reference engine speed based on said requested torque signal.
Claim 22
Dependent Claim
57 words
The system of claim 14 wherein said means for producing an adjusted load bias signal includes: means for determining a speed difference as a difference between said engine speed signal and said reference engine speed; and means for producing said deceleration-adjusted load bias signal as a function of said speed difference and of said load bias signal.
Claim 23
Dependent Claim
42 words
The system of claim 18 wherein said means for producing an adjusted load bias signal includes means for producing said adjusted load bias signal as one of said load bias signal and said deceleration-adjusted load bias signal based on a comparison therebetween.
Claim 24
Independent Claim
85 words
A method of producing an adjusted load bias signal to provide for optimal deceleration conditions for an internal combustion engine, the method comprising the steps of: sensing engine rotational speed; determining a reference engine speed; determining a load bias signal as a function of said engine rotational speed; determining a deceleration-adjusted load bias signal based on said engine rotational speed and said reference engine speed; and producing an adjusted load bias signal as one of said load bias signal and said deceleration-adjusted load bias signal.
Claim 25
Independent Claim
85 words
A method of producing an adjusted load bias signal to provide for optimal deceleration conditions for an internal combustion engine, the method comprising the steps of: sensing engine rotational speed; determining a reference engine speed; determining a load bias signal as a function of said engine rotational speed; determining a deceleration-adjusted load bias signal based on said engine rotational speed and said reference engine speed; and producing an adjusted load bias signal as one of said load bias signal and said deceleration-adjusted load bias signal.
Claim 26
Dependent Claim
22 words
The method of claim 20 further including the step of controlling loading of said engine based on said adjusted load bias signal.
Claim 27
Dependent Claim
45 words
The method of claim 20 further including the step of supplying fuel to an internal combustion engine based on a fueling command; and wherein the step of determining a load bias signal includes determining said load bias signal as a function of said fueling command.
Claim 28
Dependent Claim
53 words
The method of claim 20 wherein the step of determining a deceleration-adjusted load bias signal includes the steps of: determining a speed difference as a difference between said engine rotational speed and said reference engine speed; and determining said deceleration-adjusted load bias signal based on said speed difference and said load bias signal.
Claim 29
Dependent Claim
44 words
The method of claim 23 wherein the step of producing an adjusted load bias signal includes the step of producing said load adjusted load bias signal as one of said load bias signal and said deceleration-adjusted load bias signal based on a comparison therebetween.
Claim 30
Independent Claim
103 words
A system for producing an adjusted load bias signal to provide for optimal deceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for determining a reference engine speed based on an operator requested torque value; and a control computer computing a load bias signal based on said engine speed signal, said control computer computing a deceleration-adjusted load bias signal based on said engine speed and said reference engine speed and producing an adjusted load bias signal as one of said load bias signal and said deceleration-adjusted load bias signal.
Claim 31
Independent Claim
103 words
A system for producing an adjusted load bias signal to provide for optimal deceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for determining a reference engine speed based on an operator requested torque value; and a control computer computing a load bias signal based on said engine speed signal, said control computer computing a deceleration-adjusted load bias signal based on said engine speed and said reference engine speed and producing an adjusted load bias signal as one of said load bias signal and said deceleration-adjusted load bias signal.
Claim 32
Dependent Claim
23 words
The system of claim 25 further including a load generator responsive to said adjusted load bias signal to control loading of said engine.
Claim 33
Independent Claim
147 words
A system for producing an adjusted load bias signal to provide for optimal acceleration and deceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for sensing intake air pressure of an internal combustion engine and producing a boost pressure signal corresponding thereto; means for determining a reference engine speed; and a control computer computing a load bias signal as a function of said engine speed signal, said control computer computing an acceleration-adjusted load bias value as a function of said engine speed and boost pressure signals and computing a deceleration-adjusted load bias value as a function of said engine speed signal and said reference engine speed, said control computer producing an adjusted load bias signal as one of said load bias signal, said acceleration-adjusted load bias value and said deceleration-adjusted load bias value.
Claim 34
Independent Claim
147 words
A system for producing an adjusted load bias signal to provide for optimal acceleration and deceleration conditions for an internal combustion engine, comprising: means for sensing engine rotational speed and producing an engine speed signal corresponding thereto; means for sensing intake air pressure of an internal combustion engine and producing a boost pressure signal corresponding thereto; means for determining a reference engine speed; and a control computer computing a load bias signal as a function of said engine speed signal, said control computer computing an acceleration-adjusted load bias value as a function of said engine speed and boost pressure signals and computing a deceleration-adjusted load bias value as a function of said engine speed signal and said reference engine speed, said control computer producing an adjusted load bias signal as one of said load bias signal, said acceleration-adjusted load bias value and said deceleration-adjusted load bias value.
Claim 35
Dependent Claim
22 words
The system of claim 27 further including a load generator controlling loading of said engine based on said adjusted load bias signal.
Claim 36
Dependent Claim
42 words
The system of claim 27 further including a fuel system responsive to a fueling command to supply fuel to said engine; and wherein said control computer is further operable to compute said load bias value as a function of said fueling command.
Claim 37
Dependent Claim
38 words
The system of claim 27 wherein said control computer is operable to produce said adjusted load bias signal based on a comparison between said load bias signal, said acceleration-adjusted load bias value and said deceleration-adjusted load bias value.
Claim 38
Dependent Claim
44 words
The system of claim 30 wherein said control computer is operable to produce said adjusted load bias signal as said acceleration-adjusted load bias signal if said acceleration-adjusted load bias signal is significantly different than said load bias signal and said deceleration-adjusted load bias signal.
Claim 39
Dependent Claim
44 words
The system of claim 30 wherein said control computer is operable to produce said adjusted load bias signal as said deceleration-adjusted load bias signal if said deceleration-adjusted load bias signal is significantly different than said load bias signal and said acceleration-adjusted load bias signal.
Claim 40
Dependent Claim
46 words
The system of claim 30 wherein said control computer is operable to produce said adjusted load bias signal as said load bias signal if said acceleration-adjusted load bias signal, said deceleration-adjusted load bias signal and said load bias signal are not significantly different than each other.
Claim 41
Dependent Claim
27 words
The system of claim 30 wherein said control computer is further operable to determine said acceleration-adjusted load bias value as a function of said load bias signal.
Claim 42
Dependent Claim
27 words
The system of claim 30 wherein said control computer is further operable to determine said deceleration-adjusted load bias value as a function of said load bias signal.
Claim 43
Independent Claim
125 words
A method of producing an adjusted load bias signal to provide for optimal acceleration and deceleration conditions for an internal combustion engine, the method comprising the steps of: sensing engine rotational speed of an internal combustion engine; sensing engine intake air pressure; determining a reference engine speed based on operator requested torque; determining a load bias signal as a function of said engine rotational speed; determining an acceleration-adjusted load bias signal based on said engine rotational speed and said engine intake air pressure; determining a deceleration-adjusted load bias signal based on said engine rotational speed and said reference engine speed; and producing an adjusted load bias signal as one of said load bias signal, said acceleration-adjusted load bias signal and said deceleration-adjusted load bias signal.
Claim 44
Independent Claim
125 words
A method of producing an adjusted load bias signal to provide for optimal acceleration and deceleration conditions for an internal combustion engine, the method comprising the steps of: sensing engine rotational speed of an internal combustion engine; sensing engine intake air pressure; determining a reference engine speed based on operator requested torque; determining a load bias signal as a function of said engine rotational speed; determining an acceleration-adjusted load bias signal based on said engine rotational speed and said engine intake air pressure; determining a deceleration-adjusted load bias signal based on said engine rotational speed and said reference engine speed; and producing an adjusted load bias signal as one of said load bias signal, said acceleration-adjusted load bias signal and said deceleration-adjusted load bias signal.
Claim 45
Dependent Claim
15 words
The method of claim 36 further including the step of controlling loading of said engine.
Claim 46
Dependent Claim
45 words
The method of claim 36 wherein the step of producing an adjusted load bias signal includes the step of producing said adjusted load bias signal based on a comparison between said load bias signal, said acceleration-adjusted load bias signal and said deceleration-adjusted load bias signal.
Claim 47
Dependent Claim
51 words
The method of claim 38 wherein the step of producing said adjusted load bias signal includes the step of producing said adjusted load bias signal as said acceleration-adjusted load bias signal if said acceleration-adjusted load bias signal is significantly different from said load bias signal and said deceleration-adjusted load bias signal.
Claim 48
Dependent Claim
51 words
The method of claim 38 wherein the step of producing said adjusted load bias signal includes the step of producing said adjusted load bias signal as said deceleration-adjusted load bias signal if said deceleration-adjusted load bias signal is significantly different from said load bias signal and said acceleration-adjusted load bias signal.
Claim 49
Dependent Claim
53 words
The method of claim 38 wherein the step of producing said adjusted load bias signal includes the step of producing said adjusted load bias signal as said load bias signal if said load bias signal, said acceleration-adjusted load bias signal and said deceleration-adjusted load bias signal are not significantly different from each other.
Claim 50
Dependent Claim
31 words
The method of claim 38 wherein the step of determining said acceleration-adjusted load bias value further includes determining said acceleration-adjusted load bias value as a function of said load bias value.
Claim 51
Dependent Claim
31 words
The method of claim 38 wherein the step of determining said deceleration-adjusted load bias value further includes determining said deceleration-adjusted load bias value as a function of said load bias value.
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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) | 2004-11-05 | 2005-05-07 | 2005-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-05 | 2009-05-07 | 2009-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-05 | 2013-05-07 | 2013-11-06 | $7700.00 | Window Closed / Lapsed |