CN103075264B - One directly sprays burn engine - Google Patents
One directly sprays burn engine Download PDFInfo
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- CN103075264B CN103075264B CN201210595183.7A CN201210595183A CN103075264B CN 103075264 B CN103075264 B CN 103075264B CN 201210595183 A CN201210595183 A CN 201210595183A CN 103075264 B CN103075264 B CN 103075264B
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Abstract
The invention discloses one and directly spray burn engine, when aspirating stroke starts, oil sprayer (7) carries out first time burner oil, the homogeneous charge of air fuel ratio at 13.9-16.3 is formed in cylinder, by the signal that controller (9) receiving sensor (8) sends, export control signal to control oil sprayer (7) control piston mechanism and compress this homogeneous charge, make it be in spontaneous combustion position close to spontaneous combustion state; Before compression top center, oil sprayer (7) carries out second time injection, stratified mixtures is produced under the help that cylinder rolls stream and piston top shape, compression-ignition simultaneously, compression-ignition causes temperature, pressure raises rapidly, the first time making to be in close to spontaneous combustion zone position sprays the fuel entered and enters spontaneous combustion state, realizes homogeneous charge compression ignition.
Description
Technical field
The invention belongs to combustion powered technical field, particularly propose one and directly spray burn engine, propose a kind of classification to spray, directly spray compression-ignition, the motor of complete compression ignite to the third ignition way in the complete meaning of the employing HCCI of the perfect transition of part compression ignite can be realized.
Background technique
Modern Vehicle Engine is divided into compression ignition engine and spark-ignition engine.Spark-ignition engine, due to the deficiency such as throttling loss and lean flammability limit, makes it in the thermal efficiency, have significant limitation.Compared with spark-ignition engine, although the compression ignition engine thermal efficiency is high, it belongs to diffusive combustion, there is the too high and localized hyperthermia of firing chamber local concentration, be difficult to the generation of containment nitrogen oxide and soot (comprising particulate matter), and operation is steady, noise is larger.
Hcci engine is that people develop and aly have both advantages and do not have the new work engine of both shortcomings.HCCI refers to the mixed gas forming homogeneous at intake process, and when being compressed near top dead center, homogeneous charge involuntary ignition, visible, and it combines spark ignitor mode and compressing ignition mode two kinds of combustion manners, is a kind of new combustion pattern.Owing to not being subject to the restriction of fuel oil and oxide parting surface place proportions of ingredients in HCCI burning, there is no the localized hyperthermia reaction zone that igniting type burns yet, make the discharge of NOX and PM very low.
The major advantage of HCCI combustion manner has: 1) can obtain the high thermal efficiency identical with diesel engine with direct injection; 2) discharge of NOX and PM is low especially; 3) multiple substitute fuel can be applied; 4) advantage of petrol engine (homogeneous charge) and diesel engine (without restriction loss) is combined; 5) oil supply system of low jet pressure can be applied and to save the consumption of precious metal in catalytic reactor and reduce costs.
But its problems faced is equally outstanding with its advantage.The technical report of U.S. Department of Energy points out that the problem that HCCI combustion technology waits to solve is as follows:
1) control with engine speed and changing load timing (Ignition Timing) of catching fire; 2) during high load running, the control of rate of combustion makes rate of heat release slow down and places restrictions on noise or too high firing pressure; 3) engine cold starting; 4) development of particularly low-load HC and CO emission control systems is discharged; 5) motor variable parameter operation; 6) development of engine control strategy and system closed loop feedback system and the development of respective sensor; 7) suitable fuel comprises the exploitation of fuel combination; 8) guarantee of multi-cylinder engine cylinder uniformity; 9) combustion simulation of HCCI.
Classification pressure point combustion HCCI combustion system (SP HCCI) studies according to current HCCI the new HCCI combustion process of the internal-combustion engine of one drawn in conjunction with Combustion ignition mixture spontaneous combustion boundary correlation theory.Relative to current HCCI combustion system, classification pressure point combustion HCCI combustion system is the third ignition way in complete meaning, its essence is that classification is sprayed, the application of straight spray compression-ignition in HCCI, it achieve combustion system by complete compression ignite to the perfect transition of part compression ignite, substantially solve the subject matter that current HCCI faces.
Summary of the invention
The object of the invention is to be that proposing one directly sprays burn engine, propose a kind of classification and spray, directly spray compression-ignition, the motor of complete compression ignite to the third ignition way in the complete meaning of the employing HCCI of the perfect transition of part compression ignite can be realized.
For achieving the above object, the present invention takes following technological scheme:
One directly sprays burn engine, it is characterized in that, comprise low pressure oil way (1), high-pressure generator (2), high-pressure storage (4), Flow restrictor (5), pressure-limit valve (6), oil sprayer (7); Low pressure oil way (1) produces low-voltage fuel, transports to high-pressure generator (2); High-pressure generator (2) produces high pressure fuel; High-pressure storage (4) for storing high pressure fuel; Pressure in pressure-limit valve (6) restriction high-pressure storage (4); Oil in oil sprayer (7) is from high-pressure storage (4) ejection, and Flow restrictor (5) connects and acts on high-pressure storage (4), controls the flow of oil sprayer (7); When aspirating stroke starts, oil sprayer (7) carries out first time burner oil, the homogeneous charge of air fuel ratio at 13.9-16.3 is formed in cylinder, by the signal that controller (9) receiving sensor (8) sends, export control signal to control oil sprayer (7) control piston mechanism and compress this homogeneous charge, make it be in spontaneous combustion position close to spontaneous combustion state; Before compression top center, oil sprayer (7) carries out second time injection, stratified mixtures is produced under the help that cylinder rolls stream and piston top shape, compression-ignition simultaneously, compression-ignition causes temperature, pressure raises rapidly, the first time making to be in close to spontaneous combustion zone position sprays the fuel entered and enters spontaneous combustion state, realizes homogeneous charge compression ignition.
Described classification pressure point combustion HCCI combustion system (SP HCCI) studies according to current HCCI the new HCCI combustion process of the internal-combustion engine of one drawn in conjunction with Combustion ignition mixture spontaneous combustion boundary correlation theory.
The described burn engine that directly sprays adopts classification pressure point combustion HCCI combustion system (SP HCCI), relative to current HCCI combustion system, classification pressure point combustion HCCI combustion system is the third ignition way in complete meaning, its essence is that classification is sprayed, the application of straight spray compression-ignition in HCCI, it achieve combustion system by complete compression ignite to the perfect transition of part compression ignite, substantially solve the subject matter that current HCCI faces.
The described burn engine that directly sprays adopts classification spraying technique, when aspirating stroke starts first time burner oil, in cylinder, form very rare homogeneous charge, this mixed gas state is in close to spontaneous combustion position.This prepares for realizing classification pressure point combustion HCCI burning.
The described burn engine that directly sprays adopts classification spraying technique, before second time is injected in compression top center, stratified mixtures is produced under the help that cylinder rolls stream and piston top shape, compression-ignition simultaneously, compression-ignition causes temperature, pressure raises rapidly, the first time making to be in close to spontaneous combustion zone position sprays the fuel entered and enters spontaneous combustion state, realizes homogeneous charge compression ignition.Second time discharge time can solve HCCI and control with engine speed and changing load timing (Ignition Timing) this subject matter of catching fire, and realizes the accurate control of ignition time.
Described directly sprays burn engine according to Combustion ignition mixture spontaneous combustion boundary correlation theory, in a combustion chamber by improving temperature and pressure, when adopting the modes such as the container wall of catalyzer and special processing to solve its high load running, the control of rate of combustion makes rate of heat release slow down to place restrictions on the relevant issues that noise or the HCCI such as too high firing pressure, motor variable parameter operation face.
The described classification directly spraying burn engine is sprayed and is achieved classification pressure point combustion HCCI combustion system by complete compression ignite to the perfect transition of part compression ignite, only need adjust the ratio between first time burner oil, second time burner oil.Enter if combustion-system fuel is sprayed by second time completely, then in fact it is exactly ordinary diesel oil motor, so, can solve hcci engine cold start problem.
Described directly spray the fuel that burn engine secondary injection enters can be identical, also can be different.
The invention has the advantages that:
(1) the present invention adopts classification pressure point to fire HCCI combustion system (SP HCCI), relative to current HCCI combustion system, classification pressure point combustion HCCI combustion system is the third ignition way in complete meaning, its essence is that classification is sprayed, the application of straight spray compression-ignition in HCCI, it achieve combustion system by complete compression ignite to the perfect transition of part compression ignite.
(2) present system studies the new HCCI combustion process of the internal-combustion engine of one drawn in conjunction with Combustion ignition mixture spontaneous combustion boundary correlation theory according to current HCCI.
(3) system that present system adopts adopts classification spraying technique, when aspirating stroke starts first time burner oil, in cylinder, form very rare homogeneous charge, this mixed gas state is in close to spontaneous combustion position.This prepares for realizing classification pressure point combustion HCCI burning.
(4) system that present system adopts adopts classification spraying technique, before its second time is injected in compression top center, stratified mixtures is produced under the help that cylinder rolls stream and piston top shape, compression-ignition simultaneously, compression-ignition causes temperature, pressure raises rapidly, the first time making to be in close to spontaneous combustion zone position sprays the fuel entered and enters spontaneous combustion state, realizes homogeneous charge compression ignition.Second time discharge time can solve HCCI and control with engine speed and changing load timing (Ignition Timing) this subject matter of catching fire, and realizes the accurate control of ignition time.
(5) present system is according to Combustion ignition mixture spontaneous combustion boundary correlation theory, by adjusting the temperature and pressure of firing chamber, namely spray by adjustment first time the homogeneous charge state formed, the relevant issues that the control solving rate of combustion during its high load running makes rate of heat release slow down to place restrictions on noise or the HCCI such as too high firing pressure, motor variable parameter operation to face.
(6) classification of present system is sprayed and is achieved classification pressure point combustion HCCI combustion system by complete compression ignite to the perfect transition of part compression ignite, only need adjust the ratio between first time burner oil, second time burner oil.Enter if combustion-system fuel is sprayed by second time completely, then in fact it is exactly ordinary diesel oil motor, so, just solves hcci engine and is difficult to cold start problem.
Accompanying drawing explanation
Fig. 1 illustrates the basic principle schematic directly spraying a burn engine embodiment of the present invention.
Fig. 2 illustrates the basic principle schematic directly spraying another embodiment of burn engine of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Fig. 1 illustrates the basic principle schematic directly spraying a burn engine embodiment of the present invention.As shown in Figure 1, low pressure oil way 1 produces low-voltage fuel, transports to high-pressure generator 2; High-pressure generator 2 produces high pressure fuel; Pressure regulator valve 3 is arranged on high-pressure generator 2 side, can according to the pressure in engine load conditions adjustment and maintenance high-pressure storage; The effect of high-pressure storage 4 stores high pressure fuel, keeps pressure constant; Pressure-limit valve 6 limits the pressure in high-pressure storage; Oil in oil sprayer 7 sprays from high-pressure storage 4, and Flow restrictor 5 connects and acts on high-pressure storage 4, provides the flow restriction of expection.In other words, the effect of Flow restrictor 5 prevents oil sprayer 7 from occurring continuing oil spout; Controller 9 accepts the air quantity signal that sensor 8 sends, control the oil sprayer 7 accurate time to cylinder fuel injection, fuel injection quantity and fuel injection characteristic, accurately complete once, secondary fuel injection task, in cylinder, forming very rare homogeneous charge close to spontaneous combustion position after ensureing first time burner oil, preparing for realizing classification pressure point combustion HCCI burning.So, the burn engine system that directly sprays of the present invention have employed classification spraying technique, when aspirating stroke starts, oil sprayer 7 carries out first time burner oil, the homogeneous charge of air fuel ratio at 13.9-16.3 is formed in cylinder, by the controller unit signal that sends of 9 receiving sensors 8, export control signal and control the compression of oil sprayer 7 control piston mechanism and make this homogeneous charge state be in spontaneous combustion position close to spontaneous combustion state.Before compression top center, oil sprayer 7 carries out second time injection, stratified mixtures is produced under the help that cylinder rolls stream and piston top shape, compression-ignition simultaneously, compression-ignition causes temperature, pressure raises rapidly, the first time making to be in close to spontaneous combustion zone position sprays the fuel entered and enters spontaneous combustion state, realizes homogeneous charge compression ignition.So, the control oil sprayer 7 second time burner oil time can solve HCCI and control with engine speed and changing load timing (Ignition Timing) this subject matter of catching fire, and realizes the accurate control of ignition time.
Only need adjust the ratio between oil sprayer 7 first time burner oil and second time burner oil, classification pressure point combustion HCCI combustion system can be realized by complete compression ignite to the perfect transition of part compression ignite.Enter if combustion-system fuel is sprayed by oil sprayer 7 second time completely, then in fact it is exactly ordinary diesel oil motor.
Fig. 2 illustrates the basic principle schematic directly spraying another embodiment of burn engine of the present invention.As shown in Figure 2, illustrate two cover fuel oil supply systems in this figure, fuel delivery aspect more freely facilitates, and can realize the dispensing scheme of multiple fuel, like this, enters motor first time, the fuel of second time injection can be identical, also can be different.It can be the scalemic thereof of one or more in the liquid fuels such as gasoline, diesel oil, alcohols, hydro carbons, also can be the scalemic thereof of one or more in the gaseous fuel such as liquid gas, hydrogen, also can be the scalemic thereof of aforesaid liquid fuel and gaseous fuel.Easily can adjust the ratio between first time burner oil, second time burner oil, even realize combustion-system fuel and entered by second time injection completely.
In Fig. 2, miscellaneous part effect is identical, and low pressure oil way 1 (two covers, lower same) produces low-voltage fuel, transports to high-pressure generator 2 respectively; High-pressure generator 2 produces high pressure fuel; Pressure regulator valve 3 is arranged on high-pressure generator 2 side respectively, can according to the pressure in engine load conditions adjustment and maintenance high-pressure storage; The effect of high-pressure storage 4 is storage high pressure fuel, keeps pressure constant; Two pressure-limit valves 5 limit the pressure in two high-pressure storages 4 respectively; The effect of two Flow restrictors 6 prevents two oil sprayers 7 from occurring continuing oil spout respectively; The air quantity signal that controller 9 sends according to sensor 8, control oil sprayer 7 to time of cylinder fuel injection, fuel injection quantity and fuel injection characteristic, accurately complete first time, second time fuel oil sprays task, in cylinder, forming very rare homogeneous charge close to spontaneous combustion position after ensureing first time burner oil, preparing for realizing classification pressure point combustion HCCI burning.So, the burn engine system that directly sprays of the present invention have employed classification spraying technique, one of them oil sprayer 7 first time burner oil when aspirating stroke starts, in cylinder, form the homogeneous charge of air fuel ratio at 13.9-16.3, this mixed gas state is in close to spontaneous combustion position.Before compression top center, carry out another oil sprayer 7 second time spray, stratified mixtures is produced under the help that cylinder rolls stream and piston top shape, compression-ignition simultaneously, compression-ignition causes temperature, pressure raises rapidly, the first time making to be in close to spontaneous combustion zone position sprays the fuel entered and enters spontaneous combustion state, realizes homogeneous charge compression ignition.So, the signal that controller 9 receiving sensor 8 sends, export control signal and control the oil sprayer 7 second time burner oil time, HCCI can be solved and control with engine speed and changing load timing (Ignition Timing) this subject matter of catching fire, realize the accurate control of ignition time.
Only need adjust the ratio between oil sprayer 71 first time burner oil, oil sprayer 72 second time burner oil, classification pressure point combustion HCCI combustion system can be realized by complete compression ignite to the perfect transition of part compression ignite.Enter if combustion-system fuel is sprayed by oil sprayer 72 second time completely, then in fact it is exactly ordinary diesel oil motor.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (5)
1. one kind directly sprays burn engine, it is characterized in that, comprise low pressure oil way (1), high-pressure generator (2), high-pressure storage (4), Flow restrictor (5), pressure-limit valve (6), oil sprayer (7); Low pressure oil way (1) produces low-voltage fuel, transports to high-pressure generator (2); High-pressure generator (2) produces high pressure fuel; High-pressure storage (4) for storing high pressure fuel; Pressure in pressure-limit valve (6) restriction high-pressure storage (4); Oil in oil sprayer (7) is from high-pressure storage (4) ejection, and Flow restrictor (5) connects and acts on high-pressure storage (4), controls the flow of oil sprayer (7); When aspirating stroke starts, oil sprayer (7) carries out first time burner oil, the homogeneous charge of air fuel ratio at 13.9-16.3 is formed in cylinder, by the signal that controller (9) receiving sensor (8) sends, export control signal to control oil sprayer (7) control piston mechanism and compress this homogeneous charge, make it be in spontaneous combustion position close to spontaneous combustion state; Before compression top center, oil sprayer (7) carries out second time injection, stratified mixtures is produced under the help that cylinder rolls stream and piston top shape, compression-ignition simultaneously, compression-ignition causes temperature, pressure raises rapidly, the first time making to be in close to spontaneous combustion zone position sprays the fuel entered and enters spontaneous combustion state, realizes homogeneous charge compression ignition.
2. according to claim 1ly directly spray burn engine, it is characterized in that, also comprise pressure regulator valve (3), pressure regulator valve (3) connects high-pressure generator (2), according to the pressure in engine load conditions adjustment and maintenance high-pressure storage.
3. according to claim 1ly directly spray burn engine, it is characterized in that, ratio between adjustment oil sprayer (7) first time burner oil and second time burner oil, realizes classification pressure point combustion HCCI combustion system by complete compression ignite to the perfect transition of part compression ignite.
4. according to claim 1ly directly spray burn engine, it is characterized in that, described directly to spray the fuel that twice injection that burn engine adopts enter identical or different.
5. described directly spray burn engine according to Claims 1-4 is arbitrary, it is characterized in that, the described burn engine that directly sprays adopts two cover fuel supply systems.
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| CN201210595183.7A CN103075264B (en) | 2012-12-21 | 2012-12-21 | One directly sprays burn engine |
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| CN201210595183.7A CN103075264B (en) | 2012-12-21 | 2012-12-21 | One directly sprays burn engine |
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| CN103075264B true CN103075264B (en) | 2015-09-16 |
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| CN107781026B (en) * | 2017-09-22 | 2021-10-15 | 大连理工大学 | Premixed compression ignition system of spark plug ignition type internal combustion engine |
| CN110067638A (en) * | 2018-10-11 | 2019-07-30 | 大连理工大学 | A kind of fuel jet ignition type premixed combustion of IC engine system |
| CN112253322B (en) * | 2020-10-20 | 2022-05-31 | 东风汽车集团有限公司 | Engine control method based on oil rail pressure sensor fault |
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| CN101050734A (en) * | 2007-01-19 | 2007-10-10 | 清华大学 | High pressure co-rail electric control fuel injection system |
| CN101113683A (en) * | 2007-09-14 | 2008-01-30 | 奇瑞汽车有限公司 | Directly jetting diesel engine combustion system |
| CN101858267A (en) * | 2009-03-31 | 2010-10-13 | 马自达汽车株式会社 | Supercharged direct-injection engine |
| CN102261289A (en) * | 2010-05-24 | 2011-11-30 | 通用汽车环球科技运作有限责任公司 | Method for managing transitions in internal combustion engines with combustion phasing |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050734A (en) * | 2007-01-19 | 2007-10-10 | 清华大学 | High pressure co-rail electric control fuel injection system |
| CN101113683A (en) * | 2007-09-14 | 2008-01-30 | 奇瑞汽车有限公司 | Directly jetting diesel engine combustion system |
| CN101858267A (en) * | 2009-03-31 | 2010-10-13 | 马自达汽车株式会社 | Supercharged direct-injection engine |
| CN102261289A (en) * | 2010-05-24 | 2011-11-30 | 通用汽车环球科技运作有限责任公司 | Method for managing transitions in internal combustion engines with combustion phasing |
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