CN102619628A - Cylinder internal direct-injection gasoline engine and cylinder internal direct-injection gasoline engine co-combustion method - Google Patents
Cylinder internal direct-injection gasoline engine and cylinder internal direct-injection gasoline engine co-combustion method Download PDFInfo
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- CN102619628A CN102619628A CN2011100334649A CN201110033464A CN102619628A CN 102619628 A CN102619628 A CN 102619628A CN 2011100334649 A CN2011100334649 A CN 2011100334649A CN 201110033464 A CN201110033464 A CN 201110033464A CN 102619628 A CN102619628 A CN 102619628A
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Abstract
The invention discloses a cylinder internal direct-injection gasoline engine and a cylinder internal direct-injection gasoline engine co-combustion method. The cylinder internal direct-injection gasoline engine comprises a hydrogen injecting system and a cylinder which is provided with a gasoline nozzle, wherein the hydrogen injecting system comprises a hydrogen supply unit, a control unit and at least one hydrogen high-pressure nozzle; the hydrogen high-pressure nozzle is connected with the hydrogen supply unit; the control unit is electrically connected with the hydrogen high-pressure nozzle; and the hydrogen high-pressure nozzle is arranged on one side, far away from the gasoline nozzle, of the cylinder. The cylinder internal direct-injection gasoline engine provided by the invention is compact in structure; the cylinder internal direct-injection gasoline engine co-combustion method is scientific and reasonable; various defects of the prior art are overcome; fuel is fully combusted; the utilization rate of fuel oil is high; carbon emission and hydrogen emission are effectively reduced; and meanwhile, the averagely indicated effective pressure in the cylinder is improved, and the power output of an engine is increased. The advantages of good economy, good emission and good power of the engine are realized.
Description
Technical field
The present invention relates to the engine combustion technology, relate in particular to a kind of direct spray petrol engine in cylinder and direct spray petrol engine in cylinder and mix firing method.
Background technique
In recent years, the automotive industry technical merit develops rapidly, and people have proposed strict more requirement to aspects such as the power character of automobile, Economy, emission performance, Securities.And motor has determined power character, Economy and the emission performance of vehicle to a great extent as the power resources of automobile.The gasoline in-cylinder direct fuel-injection engine with its outstanding fuel economy, power character and emission performance, obtains increasing application.Meanwhile, still there is certain technical barrier in the gasoline in-cylinder direct fuel-injection engine, and such as unburned carbon hydrogen effulent, lean-burn is restive etc. during stratified mixture combustion.
At present, generally all contain more unburned hydrocarbons in the discharging of direct spray petrol engine in cylinder, this is mainly by its fuel injection mode decision.Because direct spray petrol engine in cylinder oil spout in cylinder; Mixed effect is poorer than intake port injection premixing mode certainly; This has just caused near the mixed gas spark plug denseer; And away from spark plug or rarer near the fringe region mixed gas of casing wall, these rarer regional mixed gass are nonflammable, contain more unburned carbon hydrogen effulent in the discharging thereby make.Especially adopt the direct spray petrol engine in cylinder of stratified combustion mode, owing to adopted the mode of deflection lean-burn, the fringe region mixed gas is thinner more nonflammable.
Summary of the invention
The present invention provides a kind of direct spray petrol engine in cylinder, in order to solve defective of the prior art, and through improvement to its formation, resulting direct spray petrol engine in cylinder sufficient combustion, fuel utilization ratio is high, effectively reduces hydrocarbon emission; Improve indicated mean effective pressure in the direct spray petrol engine in cylinder cylinder, increase engine power output.
A kind of direct spray petrol engine in cylinder; Comprise: hydrogen sprays into system and the cylinder that is provided with petrol jet; The said hydrogen system of spraying into comprises hydrogen supply unit, control unit and at least one hydrogen high pressure nozzle; Said hydrogen high pressure nozzle is connected with the hydrogen supply unit, said control unit and hydrogen high pressure nozzle Electricity Federation; Said hydrogen high pressure nozzle is arranged on the cylinder side away from petrol jet.
Further, said hydrogen supply unit comprises Hydrogen Storage equipment, and said Hydrogen Storage equipment is the High Pressure Hydrogen gas cylinder, is used for storing motor onboard and uses hydrogen.
The present invention also provides a kind of direct spray petrol engine in cylinder to mix firing method, in order to solve defective of the prior art, can when improving fuel utilization ratio and combustion efficiency, reduce discharging.
Direct spray petrol engine in cylinder provided by the invention is mixed firing method; In the direct spray petrol engine in cylinder cylinder, spray into hydrogen away from the petrol jet place; Adopt the hydrogen weak mixture in cylinder inward flange zone that ignites, thereby improve fuel utilization ratio and combustion efficiency, and effectively reduce discharging.
Further, said direct spray petrol engine in cylinder is mixed firing method and is applicable to direct spray petrol engine in cylinder starting or running state.It is fast that hydrogen has velocity of combustion, the characteristics that flammable range is big.
Further, said direct spray petrol engine in cylinder is mixed firing method and is applicable to mixed combustion of direct spray petrol engine in cylinder homogeneous or layering mixed combustion mode.
Direct spray petrol engine in cylinder working principle: when direct spray petrol engine in cylinder is worked; Set the different of operation according to operating mode with control unit (ECU); Petrol jet forms homogeneous or stratified mixtures in air inlet or compression stage oil spout in cylinder; At compression stage plug ignition in latter stage, the hydrogen of control unit (ECU) control simultaneously high pressure nozzle sprays into small quantity of hydrogen away from the petrol jet place on cylinder, instantaneous this zone that accumulates in of hydrogen is not diffused in the whole cylinder; Hydrogen is just at the fringe region of gasoline mixture the weak mixture here that ignites like this; Make the fuel mix gas firing in the cylinder more abundant, obtain higher power character and fuel utilization ratio, and effectively reduce the hydrocarbon in the discharging.
Direct spray petrol engine in cylinder provided by the invention is simple and compact for structure; It is scientific and reasonable that direct spray petrol engine in cylinder is mixed firing method, adopted the method to weak mixture zone spray small quantity of hydrogen, in cylinder, sprays into a small amount of very easily hydrogen of burning at special time; Can ignite the simultaneously gasoline mixture of thin area of combustion of hydrogen; Thereby make burning more abundant, fuel utilization ratio is higher, effectively reduces hydrocarbon emission; Simultaneously,, can improve indicated mean effective pressure in the cylinder (pressure mean values that the engine cylinder internal combustion produces is used for characterizing the power or the load of engine producing, english abbreviation IMEP), increase engine power output because many a part of hydrogen is participated in burning.Realize all good advantages of motor Economy, emission performance and power character.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
The overall structure schematic representation of the direct spray petrol engine in cylinder that Fig. 1 provides for the embodiment of the invention one;
The spray nozzle part enlarged view of the direct spray petrol engine in cylinder that Fig. 2 provides for the embodiment of the invention one.
In conjunction with accompanying drawing, reference character is following in the embodiment of the invention:
1-petrol jet 2-hydrogen high pressure nozzle 3-cylinder
4-spark plug 5-suction tude 6-outlet pipe
The 7-piston
Embodiment
For making the object of the invention, technological scheme and advantage clearer; To combine the accompanying drawing in the embodiment of the invention below, the technological scheme in the embodiment of the invention carried out clear, intactly description, obviously; Described embodiment is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment one
The overall structure schematic representation of the direct spray petrol engine in cylinder that Fig. 1 provides for the embodiment of the invention one; The spray nozzle part enlarged view of the direct spray petrol engine in cylinder that Fig. 2 provides for the embodiment of the invention one.
Visible by Fig. 1 and Fig. 2; The direct spray petrol engine in cylinder that the embodiment of the invention one provides; Comprise: hydrogen sprays into system and the cylinder 3 that is provided with petrol jet 1, and cylinder 3 is provided with suction tude 5 and outlet pipe 6, also is provided with spark plug 4 that is used to light a fire and the piston 7 that is used for conduct energy in the cylinder 3; The hydrogen system of spraying into comprises a hydrogen high pressure nozzle 2, control unit and hydrogen supply unit, and the hydrogen supply unit comprises a High Pressure Hydrogen gas cylinder, and the High Pressure Hydrogen gas cylinder is connected control unit and hydrogen high pressure nozzle 2 Electricity Federations through pipeline with hydrogen high pressure nozzle 2 with reduction valve; Hydrogen high pressure nozzle 2 is arranged on the side of cylinder 3 away from petrol jet 1.Dotted portion in the accompanying drawing 2 is represented the oily beam trajectory of petrol jet 1 ejection, and the direction of arrow is represented airflow direction.
The working principle of direct spray petrol engine in cylinder: when direct spray petrol engine in cylinder work (starting or running state), different according to operating mode and control unit (ECU) setting operation, petrol jet maybe be in the charging stage oil spout, also maybe be in the compression stage oil spout; Different according to strategy customization and fuel injection quantity size, gasoline possibly form the homogeneous charge burning in cylinder or stratified mixtures burns.In 4 igniting of compression stage spark plug in latter stage; The hydrogen of control unit (ECU) control simultaneously high pressure nozzle 2 sprays into small quantity of hydrogen at cylinder 3 away from petrol jet 1 place; Instantaneous this zone that accumulates in of hydrogen is not diffused in the whole cylinder 3, and hydrogen just at the fringe region of gasoline mixture the weak mixture here that ignites, makes the fuel mix gas firing in the cylinder 3 more abundant like this; And a plurality of point of ignition appear; More evenly fully, firing pressure and temperature are higher for the fuel mix gas firing, and volume expansion promotes piston 7 outside output kinetic energies behind the gasoline combustion.The present invention can improve fuel utilization ratio, and reduces the hydrocarbon in the discharging; Simultaneously,, can improve indicated mean effective pressure in the cylinder, increase engine power output because many a part of hydrogen is participated in burning.Realize all good advantages of motor Economy, emission performance and power character.
During the direct spray petrol engine in cylinder starting; It is bad that gasoline has just sprayed into the cylinder atomizing effect; More oil burnt to form mist of oil when petrol engine need spray into than operation; So spray into the combustibility that an amount of hydrogen can improve gasoline during starting, the fuel injection quantity when reducing starting improves starting power simultaneously and reduces the hydrocarbon content in the discharging to reduce oil consumption; During operation; Because the uniqueness of direct spray petrol engine in cylinder control; Can form the weak mixture of gasoline at the far-end of petrol jet, flammable poor, so after far-end sprays into hydrogen, impel sufficient combustion; Improve engine power, reduce hydrocarbon emission, perhaps optionally reduce fuel injection quantity to reduce oil consumption.
Embodiment two
What present embodiment and embodiment one were different is: the number of hydrogen high pressure nozzle is two, is separately positioned on the same cylinder away from a side of petrol jet, and two hydrogen high pressure nozzles all are positioned at the ignition range of spark plug.Through many places in cylinder the hydrogen high pressure nozzle is set, in cylinder during gasoline combustion to mixed gas thin area spray small quantity of hydrogen, increase point of ignition, effectively improve the working efficiency of cylinder, reduce the discharging of unburned hydrocarbons.
Embodiment three
What present embodiment and embodiment one were different is: the number of hydrogen high pressure nozzle is four, is separately positioned on 4 cylinders of 4 cylinder motor car engines away from a side of petrol jet, promptly is provided with a hydrogen high pressure nozzle in each cylinder.In cylinder during gasoline combustion to mixed gas thin area spray small quantity of hydrogen, increase point of ignition, effectively improve the working efficiency of cylinder, reduce the discharging of unburned hydrocarbons.
Embodiment four
A kind of direct spray petrol engine in cylinder is mixed firing method, in the direct spray petrol engine in cylinder cylinder, sprays into hydrogen away from the petrol jet place, adopts the ignite weak mixture in directly jetting gasoline engine cylinder inward flange zone of hydrogen.It is all effective to the direct fuel-injection engine that adopts homogeneous mixed combustion and layering mixed combustion strategy that direct spray petrol engine in cylinder of the present invention is mixed firing method.Owing to be in cylinder, to spray; The atomizing effect of gasoline and mixed effect have unfavorable situation certainly; Weak mixture appears in fringe region in cylinder easily, and this part mixed gas is nonflammable, can cause fuel availability to reduce; Combustion efficiency reduces, and this part unburned hydrocarbons can cause the deterioration of discharging.The present invention is through spraying small quantity of hydrogen to this mixed gas thin area, this part weak mixture that ignites, thereby raising fuel utilization ratio and combustion efficiency, and reduction discharging when burning.
The present invention is not limited to the direct spray petrol engine in cylinder shown in the foregoing description, as long as adopted the ignite petrol engine of technological scheme of combustion manner of directly jetting gasoline engine cylinder inward flange zone weak mixture of hydrogen all to drop within protection scope of the present invention.
What should explain at last is: above embodiment is only in order to explaining technological scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technological scheme of relevant art scheme.
Claims (6)
1. direct spray petrol engine in cylinder; It is characterized in that; Comprise: hydrogen sprays into system and the cylinder (3) that is provided with petrol jet (1); The said hydrogen system of spraying into comprises hydrogen supply unit, control unit and at least one hydrogen high pressure nozzle (2), and said hydrogen high pressure nozzle (2) is connected with the hydrogen supply unit, said control unit and hydrogen high pressure nozzle (2) Electricity Federation; Said hydrogen high pressure nozzle (2) is arranged on cylinder (3) and goes up the side away from petrol jet (1).
2. direct spray petrol engine in cylinder according to claim 1 is characterized in that, said hydrogen supply unit comprises Hydrogen Storage equipment.
3. direct spray petrol engine in cylinder according to claim 2 is characterized in that, said Hydrogen Storage equipment is the High Pressure Hydrogen gas cylinder.
4. a direct spray petrol engine in cylinder is mixed firing method, it is characterized in that, in the direct spray petrol engine in cylinder cylinder, sprays into hydrogen away from the petrol jet place, adopts the ignite weak mixture in cylinder inward flange zone of hydrogen.
5. direct spray petrol engine in cylinder according to claim 4 is mixed firing method, it is characterized in that, is applicable to direct spray petrol engine in cylinder starting or running state.
6. direct spray petrol engine in cylinder according to claim 4 is mixed firing method, it is characterized in that being applicable to mixed combustion of direct spray petrol engine in cylinder homogeneous or layering mixed combustion mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100334649A CN102619628A (en) | 2011-01-30 | 2011-01-30 | Cylinder internal direct-injection gasoline engine and cylinder internal direct-injection gasoline engine co-combustion method |
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| CN2011100334649A CN102619628A (en) | 2011-01-30 | 2011-01-30 | Cylinder internal direct-injection gasoline engine and cylinder internal direct-injection gasoline engine co-combustion method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104234833A (en) * | 2013-06-20 | 2014-12-24 | 汉氢科技股份有限公司 | Carbon removing device |
| CN111102068A (en) * | 2018-10-29 | 2020-05-05 | 广州汽车集团股份有限公司 | Engine lean combustion device, control method, engine and automobile |
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| CN201412251Y (en) * | 2009-06-17 | 2010-02-24 | 王更新 | Novel fuel system of internal combustion engine |
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| EP1378644A2 (en) * | 2002-07-04 | 2004-01-07 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine compressing and auto-igniting air-fuel mixture and method of controlling such internal combustion engine |
| JP2004239140A (en) * | 2003-02-05 | 2004-08-26 | Toyota Motor Corp | Spark ignition type internal combustion engine and combustion control method |
| CN1821561A (en) * | 2005-02-17 | 2006-08-23 | 通用汽车公司 | Compression-ignited ic engine and method of operation |
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| CN104234833A (en) * | 2013-06-20 | 2014-12-24 | 汉氢科技股份有限公司 | Carbon removing device |
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Application publication date: 20120801 |