Patent US6659071B2 successfully refreshed from Google Patents.
US6659071B2
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US
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Internal combustion engine operable in PCCI mode with early control injection and method of operation
Assignee: Cummins Inc
•
Filing: 2001-05-08
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Granted: 2003-12-09
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Expires: 2021-05-08
Abstract
Abstract An internal combustion engine operable in a premixed charge compression ignition mode and a method for operating the engine, the engine including an engine body with a piston assembly, a combustion chamber formed in the engine body by the piston assembly, an intake system for delivering intake air to the combustion chamber during an intake stroke, a mixing device that mixes a first fuel with the intake air to provide a premixed charge of air and the first fuel, a direct fuel injector adapted to directly inject a second fuel into the combustion chamber, and a control system adapted to control the direct fuel injector in a manner to provide at least one early control injection, and preferably, a plurality of early control injections of the second fuel into the combustion chamber before start of combustion of the premixed charge.
Inventors
- 👤 Leon A. LaPointe
- 👤 Cariappa M. Chenanda
- 👤 Tim R. Frazier
- 👤 Robert M. Hurst
- 👤 Lester L. Peters
- 👤 Patrick M. Pierz
- 👤 Axel O. zur Loye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:58
CPC Classifications
F; F02; F02D; F02D13/00; F02D13/02; F02D13/0203; F02B; F02B1/00; F02B1/02; F02B1/04; F02B1/12; F02B17/00; F02B17/005; F02B23/00; F02B23/02; F02B23/06; F02B23/0672; F02B37/00; F02B37/12; F02B37/18; F02B37/22; F02B69/00; F02D13/0215; F02D13/0223; F02D13/0234; F02D13/0269; F02D15/00; F02D15/04; F02D19/00; F02D19/06; F02D19/0602; F02D19/0607; F02D19/061; F02D19/0626; F02D19/0628; F02D19/0631; F02D19/0639; F02D19/0642; F02D19/0647; F02D19/0663; F02D19/0686; F02D19/0689; F02D19/0692; F02D19/08; F02D19/081; F02D19/10; F02D19/105; F02D35/00; F02D35/02; F02D35/023; F02D35/025; F02D35/028; F02D41/00; F02D41/0025; F02D41/0027; F02D41/30; F02D41/3011; F02D41/3017; F02D41/3035; F02D41/3064; F02D41/3094; F02D41/38; F02D41/40; F02D41/401; F02D41/402; F02D41/403; F02D41/405; F02D9/00; F02D9/04; F02M; F02M43/00; F02M45/00; F02M45/02; F02M69/00; F02M69/04; F02M69/042; F02M69/044; F02M69/045; F02M69/046; F02N; F02N11/00; F02N11/04; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F02B75/00; F02B75/12; F02B2075/125; F02B29/00; F02B29/04; F02B29/0406; F02B29/0418; F02B3/00; F02B3/06; F02D2041/389; F02D2250/00; F02D2250/18; F02D35/022; F02M26/00; F02M26/01; F02M26/02; F02M26/04; F02M26/05; F02M26/09; F02M26/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/30; Y02T10/40
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
145 words
An internal combustion engine operable in a premixed charge compression ignition mode with at least a portion of fuel combusted in a premixed charge compression ignition combustion event, comprising: an engine body with a piston assembly; a combustion chamber formed in said engine body by said piston assembly; an intake system for delivering intake air to said combustion chamber during an intake stroke of said piston assembly; a mixing device that mixes a first fuel with said intake air to provide a premixed charge of air and said first fuel; a direct fuel injector adapted to directly inject a second fuel into said combustion chamber; and a control system adapted to control said direct fuel injector in a manner to provide at least one early control injection of said second fuel into said combustion chamber before start of the premixed charge compression ignition combustion event.
Claim 2
Dependent Claim
145 words
An internal combustion engine operable in a premixed charge compression ignition mode with at least a portion of fuel combusted in a premixed charge compression ignition combustion event, comprising: an engine body with a piston assembly; a combustion chamber formed in said engine body by said piston assembly; an intake system for delivering intake air to said combustion chamber during an intake stroke of said piston assembly; a mixing device that mixes a first fuel with said intake air to provide a premixed charge of air and said first fuel; a direct fuel injector adapted to directly inject a second fuel into said combustion chamber; and a control system adapted to control said direct fuel injector in a manner to provide at least one early control injection of said second fuel into said combustion chamber before start of the premixed charge compression ignition combustion event.
Claim 3
Dependent Claim
49 words
The internal combustion engine of claim 1 , wherein said at least one early control injection of said second fuel is injected into said combustion chamber during at least one of said intake stroke and a compression stroke during which said premixed charge is compressed in said combustion chamber.
Claim 4
Dependent Claim
34 words
The internal combustion engine of claim 2 , wherein said at least one early control injection of said second fuel is injected into said combustion chamber during said intake stroke of said piston assembly.
Claim 5
Dependent Claim
35 words
The internal combustion engine of claim 1 , wherein said control system is further adapted to control at least one of injection timing, injection duration, injection rate and injection amount of said early control injection.
Claim 6
Dependent Claim
51 words
The internal combustion engine of claim 1 , wherein said control system is further adapted to variably control amount of said second fuel injected during said early control injection by said direct fuel injector based on at least one of an operating condition and operating mode of said internal combustion engine.
Claim 7
Dependent Claim
35 words
The internal combustion engine of claim 1 , wherein timing and amount of said at least one early control injection is variably controlled based on desired timing of start of combustion of said premixed charge.
Claim 8
Dependent Claim
28 words
The internal combustion engine of claim 1 , wherein said at least one early control injection is less than 10 percent of the total fuel to be combusted.
Claim 9
Dependent Claim
28 words
The internal combustion engine of claim 7 , wherein said at least one early control injection is less than 5 percent of the total fuel to be combusted.
Claim 10
Dependent Claim
21 words
The internal combustion engine of claim 1 , wherein said first fuel and said second fuel are different types of fuels.
Claim 11
Dependent Claim
33 words
The internal combustion engine of claim 9 , wherein at least one of said first fuel and said second fuel is at least one of diesel, natural gas, gasoline, propane, naphtha, and kerosene.
Claim 12
Dependent Claim
43 words
The internal combustion engine of claim 1 , wherein said mixing device includes at least one of a carburetor, a throttle body injector, and a port fuel injector that is adapted to mix air and said first fuel upstream of said combustion chamber.
Claim 13
Dependent Claim
23 words
The internal combustion engine of claim 1 , wherein said at least one early control injection is a plurality of early control injections.
Claim 14
Dependent Claim
48 words
The internal combustion engine of claim 12 , wherein said plurality of early control injections of said second fuel is injected into said combustion chamber during at least one of said intake stroke and a compression stroke during which said premixed charge is compressed in said combustion chamber.
Claim 15
Dependent Claim
39 words
The internal combustion engine of claim 13 , wherein said control system is further adapted to control at least one of injection timing, injection duration, injection rate and injection amount of each of said plurality of early control injections.
Claim 16
Dependent Claim
55 words
The internal combustion engine of claim 14 , wherein said control system is further adapted to variably control amount of said second fuel injected during each of said plurality of early control injections by said direct fuel injector based on at least one of an operating condition and operating mode of said internal combustion engine.
Claim 17
Dependent Claim
34 words
The internal combustion engine of claim 14 , wherein timing and amount of said plurality of early control injections is variably controlled based on desired timing of start of combustion of said premixed charge.
Claim 18
Dependent Claim
21 words
The internal combustion engine of claim 14 , wherein said first fuel is natural gas and said second fuel is diesel.
Claim 19
Dependent Claim
66 words
The internal combustion engine of claim 14 , wherein said engine body includes a plurality of cylinders each having a piston assembly that forms a combustion chamber, said control system being further adapted to vary an amount of said second fuel injected by said direct fuel injector during said plurality of early control injections to fewer than all of said plurality of cylinders at a time.
Claim 20
Dependent Claim
29 words
The internal combustion engine of claim 12 , wherein each of said plurality of early control injections are less than 10 percent of the total fuel to be combusted.
Claim 21
Dependent Claim
29 words
The internal combustion engine of claim 19 , wherein each of said plurality of early control injections are less than 5 percent of the total fuel to be combusted.
Claim 22
Dependent Claim
23 words
The internal combustion engine of claim 12 , wherein each of said plurality of early control injections are separated by a time gap.
Claim 23
Dependent Claim
38 words
The internal combustion engine of claim 21 , wherein said time gap between each of said plurality of early control injections are sufficient to allow mixing of an early control injection prior to beginning another early control injection.
Claim 24
Dependent Claim
43 words
The internal combustion engine of claim 21 , wherein said time gap between each of said plurality of early control injections are sufficient to allow said direct fuel injector to recover from an early control injection prior to beginning another early control injection.
Claim 25
Dependent Claim
19 words
The internal combustion engine of claim 21 , wherein said time gap is between 500 μsec and 2500 μsec.
Claim 26
Dependent Claim
16 words
The internal combustion engine of claim 24 , wherein said time gap is approximately 1250 μsec.
Claim 27
Independent Claim
127 words
A method of operating an internal combustion engine in a premixed charge compression ignition mode where at least a portion of fuel is combusted in a premixed charge compression ignition combustion event, said internal combustion engine having a piston assembly defining a combustion chamber, comprising the steps of: delivering at least intake air to said combustion chamber during an intake stroke of said piston assembly; mixing a first fuel with said intake air to provide a premixed charge of air and said first fuel; performing a compression stroke of said piston assembly after said intake stroke; igniting said premixed charge; and directly injecting at least one early control injection of a second fuel into said combustion chamber before start of the premixed charge compression ignition combustion event.
Claim 28
Independent Claim
127 words
A method of operating an internal combustion engine in a premixed charge compression ignition mode where at least a portion of fuel is combusted in a premixed charge compression ignition combustion event, said internal combustion engine having a piston assembly defining a combustion chamber, comprising the steps of: delivering at least intake air to said combustion chamber during an intake stroke of said piston assembly; mixing a first fuel with said intake air to provide a premixed charge of air and said first fuel; performing a compression stroke of said piston assembly after said intake stroke; igniting said premixed charge; and directly injecting at least one early control injection of a second fuel into said combustion chamber before start of the premixed charge compression ignition combustion event.
Claim 29
Dependent Claim
46 words
The method of claim 26 , further comprising the step of injecting said at least one early control injection into said combustion chamber during at least one of said intake stroke and a compression stroke during which said premixed charge is compressed in said combustion chamber.
Claim 30
Dependent Claim
28 words
The method of claim 27 , wherein said at least one early control injection is injected into said combustion chamber during said intake stroke of said piston assembly.
Claim 31
Dependent Claim
33 words
The method of claim 27 , further comprising the step of controlling at least one of injection timing, injection duration, injection rate and injection amount of said at least one early control injection.
Claim 32
Dependent Claim
49 words
The method of claim 29 , further comprising the step of variably controlling amount of said second fuel injected during said at least one early control injection by said direct fuel injector based on at least one of an operating condition and operating mode of said internal combustion engine.
Claim 33
Dependent Claim
36 words
The method of claim 29 , further comprising the step of variably controlling timing and amount of said at least one early control injection based on desired timing of start of combustion of said premixed charge.
Claim 34
Dependent Claim
19 words
The method of claim 27 , wherein said first fuel and said second fuel are different types of fuels.
Claim 35
Dependent Claim
31 words
The method of claim 32 , wherein at least one of said first fuel and said second fuel is at least one of diesel, natural gas, gasoline, propane, naphtha, and kerosene.
Claim 36
Dependent Claim
19 words
The method of claim 33 , wherein said first fuel is natural gas and said second fuel is diesel.
Claim 37
Dependent Claim
21 words
The method of claim 27 , wherein said at least one early control injection is a plurality of early control injections.
Claim 38
Dependent Claim
45 words
The method of claim 35 , further comprising the step of injecting said plurality of early control injections into said combustion chamber during at least one of said intake stroke and a compression stroke during which said premixed charge is compressed in said combustion chamber.
Claim 39
Dependent Claim
34 words
The method of claim 36 , further comprising the step of controlling at least one of injection timing, injection duration, injection rate and injection amount of each of said plurality of early control injections.
Claim 40
Dependent Claim
50 words
The method of claim 37 , further comprising the step of variably controlling amount of said second fuel injected during each of said plurality of early control injections by said direct fuel injector based on at least one of an operating condition and operating mode of said internal combustion engine.
Claim 41
Dependent Claim
35 words
The method of claim 37 , further comprising the step of variably controlling timing and amount of said plurality of early control injections based on desired timing of start of combustion of said premixed charge.
Claim 42
Dependent Claim
27 words
The method of claim 35 , wherein each of said plurality of early control injections are less than 10 percent of the total fuel to be combusted.
Claim 43
Dependent Claim
27 words
The method of claim 40 , wherein each of said plurality of early control injections are less than 5 percent of the total fuel to be combusted.
Claim 44
Dependent Claim
21 words
The method of claim 35 , wherein each of said plurality of early control injections are separated by a time gap.
Claim 45
Dependent Claim
25 words
The method of claim 42 , wherein said time gap is sufficient to allow mixing of a control injection prior to beginning another control injection.
Claim 46
Dependent Claim
29 words
The method of claim 42 , wherein said time gap is sufficient to allow said direct injector to recover from a control injection prior to beginning another control injection.
Claim 47
Dependent Claim
17 words
The method of claim 42 , wherein said time gap is between 500 μsec and 2500 μsec.
Claim 48
Dependent Claim
14 words
The method of claim 45 , wherein said time gap is approximately 1250 μsec.
Claim 49
Dependent Claim
63 words
The method of claim 40 , wherein said internal combustion engine includes a plurality of cylinders each having a piston assembly that forms a combustion chamber, further comprising the step of varying an amount of said second fuel injected by said direct fuel injector during said plurality of early control injections to fewer than all of said plurality of cylinders at a time.
References Cited (Backward Citations)
US1132581A
Cited
US1128463A
Cited
DE332524C
Cited
DE481070C
Cited
US2909159A
Cited
US2977942A
Cited
US4193382A
Cited
US4445468A
Cited
US4572133A
Cited
US4499885A
Cited
US4524730A
Cited
US4543930A
Cited
US4719880A
Cited
US4768481A
Cited
US4831993A
Cited
US5060610A
Cited
US5127378A
Cited
US5119780A
Cited
US5265562A
Cited
US5237812A
Cited
US5467757A
Cited
US5365902A
Cited
US5535716A
Cited
US5642705A
Cited
US5549087A
Cited
DE19519663A1
Cited
US5740775A
Cited
US5609131A
Cited
US6286482B1
Cited
US5713328A
Cited
US6227151B1
Cited
US6230683B1
Cited
GB2328717A
Cited
US6067954A
Cited
DE19804983A1
Cited
US6276334B1
Cited
DE19810935A1
Cited
US6032617A
Cited
US6116208A
Cited
US6095102A
Cited
US6578545B1
Cited
US6269634B1
Cited
GB2353070A
Cited
US6382177B1
Cited
WO2002006652A2
Cited
US6363908B1
Cited
US6360531B1
Cited
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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) | 2006-12-08 | 2007-06-09 | 2007-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-12-08 | 2011-06-09 | 2011-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-12-08 | 2015-06-09 | 2015-12-09 | $7700.00 | Window Closed / Lapsed |