US4924828A
Expired / Lapsed
US
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Method and system for controlled combustion engines
Assignee: United States Department of Energy
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Filing: 1989-02-24
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Granted: 1990-05-15
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Expires: 2009-02-24
Abstract
Abstract A system for controlling combustion in internal combustion engines of both the Diesel or Otto type, which relies on establishing fluid dynamic conditions and structures wherein fuel and air are entrained, mixed and caused to be ignited in the interior of a multiplicity of eddies, and where these structures are caused to sequentially fill the headspace of the cylinders.
Inventors
- 👤 A. K. Oppenheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
F; F02; F02D; F02D41/00; F02B; F02B3/00; F02B3/06; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
161 words
A method for executing the combustion of reactants in internal combustion engines, which comprises the steps of: compressing a gaseous working fluid, comprising at least a part of one or more said reactants; sequentially injecting into said gaseous working fluid, at predetermined time intervals upon at least partially compressing said working fluid, a plurality of jets comprising the balance of said reactants under conditions leading to the formation of a plurality of plumes, each of said plumes having a fluid dynamic structure comprising a multiplicity of eddies entraining reactants from said working fluid and causing said reactants to be mixed within the interior of said eddies of said plumes; initiating thereupon the exothermic process of combustion to proceed in the interior of said plumes, each of said plurality of plumes occupying a fraction of the volume containing said working fluid, and the totality of plumes occupying upon their expansion due to the exothermic effects of combustion, essentially the entire head space.
Claim 2
Independent Claim
161 words
A method for executing the combustion of reactants in internal combustion engines, which comprises the steps of: compressing a gaseous working fluid, comprising at least a part of one or more said reactants; sequentially injecting into said gaseous working fluid, at predetermined time intervals upon at least partially compressing said working fluid, a plurality of jets comprising the balance of said reactants under conditions leading to the formation of a plurality of plumes, each of said plumes having a fluid dynamic structure comprising a multiplicity of eddies entraining reactants from said working fluid and causing said reactants to be mixed within the interior of said eddies of said plumes; initiating thereupon the exothermic process of combustion to proceed in the interior of said plumes, each of said plurality of plumes occupying a fraction of the volume containing said working fluid, and the totality of plumes occupying upon their expansion due to the exothermic effects of combustion, essentially the entire head space.
Claim 3
Dependent Claim
62 words
The method of claim 1, wherein said internal combustion engine if of the premixed type, and wherein said working fluid comprises air and hydrocarbon fuel, and wherein said jets comprise products of combustion of fuel and air in a pre-combustion chamber, within an appropriate jet generator plug, to act as the reagents for initiating combustion reactions in the interior of said eddies.
Claim 4
Dependent Claim
18 words
The method of claim 2, wherein said jets are products of combustion of gasoline or methanol and air.
Claim 5
Dependent Claim
66 words
The method of claim 3, wherein the mixture of said air and hydrocarbon fuel in said working fluid contained in the engine cylinder is lean by virtue of excess air and mixed with a diluent consisting of recirculated combustion products, whereas the mixture of said fuel and air in the pre-combustion chamber, contained within the plug employed for the generation of said jets, is fuel rich.
Claim 6
Dependent Claim
67 words
The method of claim 2, wherein said plurality of jets is comprised of groups of jets, each jet in each of said groups being injected simultaneously with the other jets in the same group, by being issued from the same pre-combustion chamber and wherein said groups are injected independently during a predetermined time interval at the optimum time for ignition near the end of the compression stroke.
Claim 7
Dependent Claim
15 words
The method of claim 2, wherein the number of plugs is between two and six.
Claim 8
Dependent Claim
87 words
The method of claim 1, wherein said internal combustion engine is of the non-premixed charge type and wherein said gaseous working fluid contained in the engine cylinder comprises air, and wherein said jets comprise fuel dispensed in a carrier stream of compressed air, and wherein said reagent for initiating combustion reactions in the interior of said eddies is said air of said working fluid, contained in engine cylinder, having been heated to a temperature sufficient to cause combustion of said fuel in the interior or said eddies.
Claim 9
Dependent Claim
21 words
The method of claim 7, wherein said plugs generate between 1-6 jets directed into separate distinct regions of the head space.
Claim 10
Dependent Claim
26 words
The method of claim 7, wherein said plurality of jets are injected independently during an appropriate time interval near the maximum compression of said working fluid.
Claim 11
Dependent Claim
15 words
The method of claim 9, wherein said time interval is determined by sensing engine conditions.
Claim 12
Dependent Claim
68 words
The method of claim 10, wherein said engine conditions are selected from one or more parameters of crank angle marking the position of the piston, pressure of the working substance in the cylinder head space, temperature of the working substance, concentration of representative chemical species indicative of the chemical composition of the working fluid, luminosity, or ionization signal generated in the course of the exothermic process of combustion.
Claim 13
Dependent Claim
41 words
The method of claim 10, wherein engine conditions are sensed, signals indicative of said engine condition compared with a set of predetermined engine condition data indicating optimal combustion characteristics, and wherein signal commands for jet formation are issued in response thereto.
Claim 14
Dependent Claim
16 words
The method of claim 8, wherein the number of jets is one of 4 or 8.
Claim 15
Dependent Claim
20 words
The method of claim 1, wherein said internal combustion engine is a two stroke engine of the premixed charge type.
Claim 16
Dependent Claim
20 words
The method of claim 1, wherein said internal combustion engine is a two stroke engine of the non-premixed charge type.
Claim 17
Dependent Claim
132 words
Apparatus for executing the combustion of reactants in internal combustion engines wherein gaseous working fluids comprise at least a part of one or more of said reactants, and are compressed and burned in the head space of a piston and cylinder arrangement, comprising: at least two means for forming and injecting into distinct regions of said head space a plurality of jets comprising the balance of said reactants, said jets having the fluid dynamic characteristics leading to the formation of plumes within said regions of said head space, said plumes comprising a multiplicity of eddies entraining reactants from said working fluid and causing them to contact the reactants within said plumes; and means for introducing into said plumes reagents for initiating combustion reactions between said reactants in the interior of said eddies.
Claim 18
Dependent Claim
132 words
Apparatus for executing the combustion of reactants in internal combustion engines wherein gaseous working fluids comprise at least a part of one or more of said reactants, and are compressed and burned in the head space of a piston and cylinder arrangement, comprising: at least two means for forming and injecting into distinct regions of said head space a plurality of jets comprising the balance of said reactants, said jets having the fluid dynamic characteristics leading to the formation of plumes within said regions of said head space, said plumes comprising a multiplicity of eddies entraining reactants from said working fluid and causing them to contact the reactants within said plumes; and means for introducing into said plumes reagents for initiating combustion reactions between said reactants in the interior of said eddies.
Claim 19
Dependent Claim
80 words
The apparatus of claim 16, wherein said internal combustion engine is an engine of the premixed charge type, wherein said working fluid is a mixture of fuel and air, and wherein said means for forming and injecting said jets comprises a combustion prechamber having at least one exit orifice for forming said jets, in fluid communication with said head space; means for introducing a fuel and air into said prechamber; and means for establishing an electrical discharge through said prechamber.
Claim 20
Dependent Claim
18 words
The apparatus of claim 17, wherein said fuel and air introduced into said prechamber constitute a rich mixture.
Claim 21
Dependent Claim
21 words
The apparatus of claim 18, comprising separate fuel supply systems for introducing fuel into said working fluid and into said prechamber.
Claim 22
Dependent Claim
21 words
The apparatus of claim 17, wherein said fuel introduced into said prechamber is methanol or a mixture of methanol and gasoline.
Claim 23
Dependent Claim
23 words
The apparatus of claim 17, wherein the number of said means of injecting jets into said head space is from two to six.
Claim 24
Dependent Claim
78 words
The apparatus of claim 16, wherein said internal combustion engine is an engine of the non-premixed charge type, wherein said working fluid is air, wherein said plurality of said jets contain essentially all the fuel to be burned in said head space in the course of a working stroke of said piston, and wherein said reagent for initiating combustion is said air, contained in the cylinder and heated by piston compression above the ignition temperature of said fuel.
Claim 25
Dependent Claim
64 words
The apparatus of claim 22, wherein said means for forming and injecting said jets comprises valve means for interrupting fluid communication between said means for forming jets and said head space, and wherein said means for injecting said jets comprises means for generating a stream of high pressure air and means for disposing in said stream of high pressure air a dispersion of fuel.
Claim 26
Dependent Claim
31 words
The apparatus of claim 23, including means for cooling said air and fuel to a temperature below the temperature of the working fluid into which the jet is to be injected.
Claim 27
Dependent Claim
13 words
The apparatus of claim 23, wherein said engine is a two stroke engine.
Claim 28
Dependent Claim
56 words
The apparatus of claim 16, further including sensors for sensing engine conditions and issuing signals indicative of engine conditions; microprocessor means operatively connected to said sensor means for receiving said signals, converting said signals into a set of command signals, and means for establishing engine operation parameters operatively connected to and responsive to said command signals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |