US6516774B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Premixed charge compression ignition engine with variable speed SOC control and method of operation
Assignee: Cummins Inc
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Filing: 2001-05-08
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Granted: 2003-02-11
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Expires: 2021-05-08
Abstract
Abstract A novel and improved engine and method are provided which includes a premixed charge compression ignition engine capable of operating over a wide load range without the need to vary the IMT beyond easily achievable or desirable temperature levels. The engine and method adjust the start of combustion by adjusting the engine speed and torque while delivering a targeted engine horsepower output.
Inventors
- 👤 Axel O. zur Loye
- 👤 Tim R. Frazier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:58
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: 20
Claim 1
Independent Claim
131 words
An internal combustion engine operable in a premixed charge compression ignition mode at an engine speed and an engine torque corresponding to an engine horsepower output, comprising: an engine body; a combustion chamber formed in the engine body; an intake air system for delivering intake air to said combustion chamber; a fuel delivery system mounted on said engine body to delivery to at least one of said intake air system and said combustion chamber, said supply fuel and said intake air forming a premixed charge; and a control system adapted to adjust the engine and adjust the engine speed when the engine is operating in the premixed charge compression ignition mode to vary a timing of a start of combustion of the premixed charge while delivering a targeted engine horsepower output.
Claim 2
Dependent Claim
131 words
An internal combustion engine operable in a premixed charge compression ignition mode at an engine speed and an engine torque corresponding to an engine horsepower output, comprising: an engine body; a combustion chamber formed in the engine body; an intake air system for delivering intake air to said combustion chamber; a fuel delivery system mounted on said engine body to delivery to at least one of said intake air system and said combustion chamber, said supply fuel and said intake air forming a premixed charge; and a control system adapted to adjust the engine and adjust the engine speed when the engine is operating in the premixed charge compression ignition mode to vary a timing of a start of combustion of the premixed charge while delivering a targeted engine horsepower output.
Claim 3
Dependent Claim
46 words
The engine of claim 1 , further including a combustion sensor connected to said control system for sensing the start of combustion and generating a start of combustion signal, said control system adapted to control a start of combustion based on said start of combustion signal.
Claim 4
Dependent Claim
10 words
The engine of claim 1 , further including a turbocharger.
Claim 5
Dependent Claim
21 words
The engine of claim 1 , wherein said fuel delivery system supplies only a single type of fuel to the engine.
Claim 6
Dependent Claim
51 words
The engine of claim 1 , wherein said control system is further adapted to cause said fuel delivery system to deliver a post-ignition injection of fuel into said combustion chamber after the start of combustion of the premixed charge in said combustion chamber when in said premixed charge compression ignition mode.
Claim 7
Dependent Claim
21 words
The engine of claim 1 , wherein said fuel is one of diesel fuel, kerosene, gasoline, natural gas, hydrogen and propane.
Claim 8
Dependent Claim
36 words
The engine of claim 1 , further including an engine torque control system, said control system further adapted to cause said engine torque control system to increase the engine torque to advance the start of combustion.
Claim 9
Dependent Claim
38 words
The engine of claim 1 , wherein said control system is further adapted to control said fuel delivery system to adjust a quantity of said fuel delivered to one of said intake air system and said combustion chamber.
Claim 10
Dependent Claim
29 words
The engine of claim 1 , wherein said control system is adapted to adjust the engine torque and adjust the engine speed to maintain engine horsepower output substantially constant.
Claim 11
Independent Claim
107 words
A method of operating an internal combustion engine in a premixed charge compression ignition mode at an engine speed and an engine torque corresponding to an engine horsepower output, comprising the steps of: providing intake air to a combustion chamber; delivering fuel to at least one of said intake air system and said combustion chamber, said fuel and said intake air forming a premixed charge; and adjusting the engine speed and adjusting the engine torque when the engine is operating in the premixed charge compression ignition mode to vary a timing of a start of combustion of the premixed charge while delivering a desired engine horsepower output.
Claim 12
Independent Claim
107 words
A method of operating an internal combustion engine in a premixed charge compression ignition mode at an engine speed and an engine torque corresponding to an engine horsepower output, comprising the steps of: providing intake air to a combustion chamber; delivering fuel to at least one of said intake air system and said combustion chamber, said fuel and said intake air forming a premixed charge; and adjusting the engine speed and adjusting the engine torque when the engine is operating in the premixed charge compression ignition mode to vary a timing of a start of combustion of the premixed charge while delivering a desired engine horsepower output.
Claim 13
Dependent Claim
14 words
The method of claim 10 , wherein the engine uses only a single fuel.
Claim 14
Dependent Claim
13 words
The method of claim 11 , wherein said single fuel is diesel fuel.
Claim 15
Dependent Claim
29 words
The method of claim 10 , further including the step of adjusting a quantity of said fuel delivered to one of said intake air system and said combustion chamber.
Claim 16
Dependent Claim
30 words
The method of claim 13 , wherein the steps of adjusting the engine torque and adjusting the quantity of said fuel per engine cycle are performed at least nearly simultaneously.
Claim 17
Dependent Claim
20 words
The method of claim 10 , further including the step of increasing engine torque to advance the start of combustion.
Claim 18
Dependent Claim
35 words
The method of claim 10 , further including the steps of sensing the start of combustion, generating a start of combustion signal and controlling the start of combustion based on said start of combustion signal.
Claim 19
Dependent Claim
45 words
The method of claim 10 , further including the step of delivering a post-ignition injection of fuel into the combustion chamber of the engine after the start of combustion of the premixed charge in the combustion chamber when in said premixed charge compression ignition mode.
Claim 20
Dependent Claim
27 words
The method of claim 10 , further including the steps of adjusting the engine torque and adjusting the engine speed to maintain engine horsepower output substantially constant.
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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) | 2006-02-10 | 2006-08-12 | 2007-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-02-10 | 2010-08-12 | 2011-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-02-10 | 2014-08-12 | 2015-02-11 | $7700.00 | Window Closed / Lapsed |