CN102733995A - Liquid gas fuel liquid direct-injection device and composite valve of engine - Google Patents
Liquid gas fuel liquid direct-injection device and composite valve of engine Download PDFInfo
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- CN102733995A CN102733995A CN2012102048256A CN201210204825A CN102733995A CN 102733995 A CN102733995 A CN 102733995A CN 2012102048256 A CN2012102048256 A CN 2012102048256A CN 201210204825 A CN201210204825 A CN 201210204825A CN 102733995 A CN102733995 A CN 102733995A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The invention discloses a liquid gas fuel liquid direct-injection device, and belongs to the technical field of engines. The liquid gas fuel liquid direct-injection device comprises a cylinder head arranged on a shell of an engine, the cylinder head is provided with an isolating cavity with an opened end, the isolating cavity is communicated with a combustion chamber of the engine through the opened end, a poppet valve stem which is driven by a power device is slidably arranged on the cylinder head, and a pneumatic poppet valve which is used for sealing the opened end of the isolating cavity is arranged at an end of the poppet valve stem; and an electric control liquid spraying valve is arranged on the cylinder head, and a sprayer of the electric control liquid spraying valve extends in the isolating valve. The invention also discloses a composite valve of an engine, the liquid gas fuel liquid direct-injection device and a gas inlet door of the engine are integrated, and multiple effects of controlling air and gas fuel to be injected into a cylinder of the traditional engine structure are kept. Liquid gas fuel is injected to the inside of the cylinder of the engine, and the liquid gas fuel liquid direct-injection device and the composite valve of the engine are widely applied to engines.
Description
Technical field
The present invention relates to technical field of engines, relate in particular to liquid directly spray device of a kind of liquid gas fuel and motor combination valve.
Background technique
Compare with the gaseous state gaseous fuel, liquid gas fuel energy storage density is big, and the motor flying power is strong.For example become LNG (LNG Liquefied natural gas) at-162 ℃ after the natural gas refining, its volume is 1/625 of the mark condition.At present, motor adopts liquid gas fuel, generally carries out heating and gasifying earlier, then through gaseous fuel gas-duct jetting mode, forms and supplies with subsystem.One of this mode shortcoming is that the gasification link needs the thermal equilibrium management, and this needs a huge auxiliary system; Secondly, the motor charging efficiency is low, power descends.
The gaseous fuel in-cylinder injection has more advantage: can pass through the isoparametric cooperate optimization coupling of fuel injection timing, air fuel ratio and ignition advance angle; The strengening burning process control; Can significantly reduce or eliminate the charge loss in efficiency that gaseous fuel causes, the fuel loss when avoiding scavenging.
Gaseous state gaseous fuel in-cylinder injection, particularly there is more difficulty in high pressure gaseous state gaseous fuel inner cylinder direct injection on engineering.Spray regime has the short advantage of discharge time under the identical weight in the liquid gas fuel tank and adopt, and the cold energy of fuel capable of using reduces cylinder temperature, the inhibition tendency to detonate.Yet the HTHP that cylinder fuel combustion produced is for using automatically controlled liquid spray valve to realize that in-cylinder direct injection is a technical barrier.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of liquid gas fuel liquid directly spray device, to solve the technical problem of engine liquid oxidizing gases fuel in-cylinder injection.
For solving the problems of the technologies described above; Technological scheme of the present invention is: the liquid directly spray device of liquid gas fuel; Comprise the cylinder head that is installed on the motor body, said cylinder head has one one separate cavities that end is uncovered, and said separate cavities is communicated with the firing chamber of motor through open-mouth end; Be slidingly fitted with the bacterium valve rod that is driven by power plant on the said cylinder head, the end of said bacterium valve rod has a bacterium valve that is used to seal the open-mouth end of said separate cavities; Automatically controlled liquid spray valve is installed on the said cylinder head, and the shower nozzle of said automatically controlled liquid spray valve stretches into said separate cavities.
After having adopted technique scheme; The invention has the beneficial effects as follows: (1) is owing to designed separate cavities and adopted bacterium valve timing control separate cavities and firing chamber UNICOM or isolation; Make automatically controlled liquid spray valve avoid the environment of high combustion chamber pressures, high temperature, high pollution, realized spraying in the engine cylinder liquid gaseous fuel; (2) the straight spray of liquid gas fuel low temperature can reduce cylinder part temperature and mixture temperature, helps suppressing that the surface catches fire and detonation.(3) automatically controlled liquid spray valve realizes that fuel sprays quantitatively and timing controlled, can make more air get into cylinder, has improved the charging efficiency of motor.
The present invention has also solved another technical problem: a kind of motor combination valve is provided, to solve the technical problem of spraying liquid gaseous fuel in the engine cylinder.
For solving the problems of the technologies described above; Technological scheme of the present invention is: the motor combination valve; Comprise the cylinder head that is installed on the motor body, said cylinder head has one one separate cavities that end is uncovered, and said separate cavities is communicated with the firing chamber of motor through open-mouth end; Be slidingly fitted with the valve stem that is driven by power plant on the said cylinder head, the end of said valve stem has a valve bacterium valve that is used to seal the open-mouth end of said separate cavities; An end cylinder head relative with said open-mouth end is provided with gas-entered passageway; The end of said gas-entered passageway is provided with the radial direction through hole that is communicated with said separate cavities; Said valve stem is provided with the convexity that is used for the said gas-entered passageway of shutoff, and said convexity is slidingly mounted in the said gas-entered passageway; Automatically controlled liquid spray valve is installed on the said cylinder head, and the shower nozzle of said automatically controlled liquid spray valve stretches into said separate cavities.
After having adopted technique scheme; The invention has the beneficial effects as follows: (1) is owing to designed separate cavities; Valve bacterium valve timing control separate cavities and firing chamber UNICOM or isolation; Make automatically controlled liquid spray valve avoid the environment of high combustion chamber pressures, high temperature, high pollution, realized spraying in the engine cylinder liquid gaseous fuel; (2) the straight spray of liquid gas fuel low temperature can reduce cylinder part temperature and mixture temperature, helps suppressing that the surface catches fire and detonation; (3) automatically controlled liquid spray valve is realized the quantitative and timing controlled that liquefied fuel sprays, and can make more air get into cylinder, has improved the charging efficiency of motor; (4) fine to conventional engines structure inheritance; Only change the part-structure of conventional engines intake valve and cylinder head; Liquid directly spray device of liquid gas fuel and intake valve are combined, have control air and gaseous fuel and spray the multiple action that gets into cylinder.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the phase diagram of the embodiment of the invention two air inlets;
Fig. 3 is the phase diagram that the embodiment of the invention two fuel spray;
Fig. 4 is the phase diagram of the embodiment of the invention two IC Intake Valve Closes;
Fig. 5 is to use the four stroke engine work phase diagram of liquid gas fuel;
Among the figure: 1, cylinder head, 2, separate cavities, 3, the bacterium valve rod, 30, valve stem, 4, the bacterium valve, 40, valve bacterium valve, 5, automatically controlled liquid spray valve, 6, radial direction through hole, 7, convexity, 8, gas-entered passageway.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Embodiment one:
As shown in Figure 1; The liquid directly spray device of a kind of liquid gas fuel comprises the cylinder head 1 that is installed on the motor body, and cylinder head 1 has one one separate cavities 2 that end is uncovered; Separate cavities 2 is communicated with the firing chamber of motor through open-mouth end; Be slidingly fitted with the bacterium valve rod 3 that is driven by power plant on the cylinder head 1, power plant are engine air distribution system cam set or electronic mode etc. usually, and those skilled in the art can utilize the conventional techniques means to implement; Repeat no more at this, the end of bacterium valve rod 3 has a bacterium valve 4 that is used for the open-mouth end in seal chamber 2; Automatically controlled liquid spray valve 5 is installed on the cylinder head 1, is used for emitted dose metering and injection timing, the shower nozzle of automatically controlled liquid spray valve 5 stretches into separate cavities 2.
As shown in Figure 5, Fig. 5 is to use the four stroke engine work phase diagram of liquid gas fuel, selects suitable air inlet phase, fuel injection phase and exhaust phase place, and suitable ignition phase, and is all very meaningful to the raising of HP, hp/litre and efficient.
Embodiment two:
Shown in Fig. 2, Fig. 3 and Fig. 4 are common; Main design is the integrated a kind of motor combination valve of intake valve of liquid directly spray device of liquid gas fuel and motor is comprised the cylinder head 1 that is installed on the motor body that cylinder head 1 has one one separate cavities 2 that end is uncovered; Separate cavities 2 is communicated with the firing chamber of motor through open-mouth end; Be slidingly fitted with the valve stem 30 that is driven by power plant on the cylinder head 1, power plant are engine air distribution system cam set or electronic mode etc. usually, and those skilled in the art can utilize the conventional techniques means to implement; Repeat no more at this, the end of valve stem 3 has a valve bacterium valve 40 that is used for the open-mouth end in seal chamber 2; An end cylinder head 1 relative with open-mouth end is provided with gas-entered passageway 8, and the end of gas-entered passageway 8 is provided with the radial direction through hole 6 that is communicated with separate cavities 2, and valve stem 30 is provided with the convexity 7 that is used for shutoff gas-entered passageway 8, and protruding 7 are slidingly mounted in the gas-entered passageway 8; Automatically controlled liquid spray valve 5 is installed on the cylinder head 1, is used for emitted dose metering and injection timing, the shower nozzle of automatically controlled liquid spray valve 5 stretches into separate cavities 2.Use the four stroke engine work phase diagram of liquid gas fuel, as shown in Figure 5.
Protruding 7 are slidingly mounted in the gas-entered passageway 8 and as close as possible valve bacterium valve 40; After air inlet phase began, valve stem 30 quilts drove and drive intake valve bacterium valve 40 and open, and air is through gas-entered passageway 8, convexity 7 and radial direction through hole 6 entering firing chambers; Protruding 7 lag behind the open phase of valve bacterium valve 40; Air inlet phase latter stage, the valve return of particular design is divided into " protruding 7 close " and " valve bacterium valve 40 cuts out " two stages, and " protruding 7 close " is to move on the valve stem 30; Protruding 7 get up gas-entered passageway 8 shutoff, and air can not get into separate cavities 2 by gas-entered passageway 8.After convexity 7 was closed, valve bacterium valve 40 still kept certain aperture, and automatically controlled liquid spray this moment valve 5 ejects quantitative liquid gas fuel according to instruction; Spray duration about (15 ~ 20) degree CA, after automatically controlled liquid spray valve 5 stopped to spray, " valve bacterium valve 40 cuts out " was for moving in valve stem 30 continuation; Valve bacterium valve 40 gets up separate cavities 2 shutoff; Valve bacterium valve 40 cuts out at this moment, and separate cavities 2 and the firing chamber that is in " compression phase " are cut off, and can guarantee the air charge of motor to greatest extent; Effectively hoisting power and efficient, and can design combustion manner such as different fuel concentration stratification.
The present invention is not limited to above-mentioned concrete mode of execution, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within protection scope of the present invention.
Claims (2)
1. the liquid directly spray device of liquid gas fuel; Comprise the cylinder head that is installed on the motor body; It is characterized in that: said cylinder head has one one separate cavities that end is uncovered; Said separate cavities is communicated with the firing chamber of motor through open-mouth end, is slidingly fitted with the bacterium valve rod that is driven by power plant on the said cylinder head, and the end of said bacterium valve rod has a bacterium valve that is used to seal the open-mouth end of said separate cavities; Automatically controlled liquid spray valve is installed on the said cylinder head, and the shower nozzle of said automatically controlled liquid spray valve stretches into said separate cavities.
2. motor combination valve; Comprise the cylinder head that is installed on the motor body; It is characterized in that: said cylinder head has one one separate cavities that end is uncovered; Said separate cavities is communicated with the firing chamber of motor through open-mouth end, is slidingly fitted with the valve stem that is driven by power plant on the said cylinder head, and the end of said valve stem has a valve bacterium valve that is used to seal the open-mouth end of said separate cavities; An end cylinder head relative with said open-mouth end is provided with gas-entered passageway; The end of said gas-entered passageway is provided with the radial direction through hole that is communicated with said separate cavities; Said valve stem is provided with the convexity that is used for the said gas-entered passageway of shutoff, and said convexity is slidingly mounted in the said gas-entered passageway; Automatically controlled liquid spray valve is installed on the said cylinder head, and the shower nozzle of said automatically controlled liquid spray valve stretches into said separate cavities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102048256A CN102733995A (en) | 2012-06-19 | 2012-06-19 | Liquid gas fuel liquid direct-injection device and composite valve of engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102048256A CN102733995A (en) | 2012-06-19 | 2012-06-19 | Liquid gas fuel liquid direct-injection device and composite valve of engine |
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| CN102733995A true CN102733995A (en) | 2012-10-17 |
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| CN2012102048256A Pending CN102733995A (en) | 2012-06-19 | 2012-06-19 | Liquid gas fuel liquid direct-injection device and composite valve of engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263549A (en) * | 2021-12-08 | 2022-04-01 | 北京工业大学 | Gas cylinder internal direct injection engine based on valve mechanism and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781014Y (en) * | 2004-08-27 | 2006-05-17 | 上海大众汽车有限公司 | Vehicle liquified petroleum gas injection system for two-fuel supply system |
| CN1869426A (en) * | 2006-06-26 | 2006-11-29 | 陆斌 | Supply method and device for gas fuel of gas engine |
| JP2007247639A (en) * | 2006-03-16 | 2007-09-27 | Hyundai Motor Co Ltd | Lpi gas injector system, fuel leakage preventive method using the same, and starting failure preventive method |
| CN101545418A (en) * | 2009-05-07 | 2009-09-30 | 哈尔滨工程大学 | Gas jet device of electric control jet lean-burn natural gas engine and jet control method |
| CN202140199U (en) * | 2011-05-16 | 2012-02-08 | 胜利油田胜利动力机械集团有限公司 | Air intake valve type fuel gas supplying mechanism |
| CN202611929U (en) * | 2012-06-19 | 2012-12-19 | 潍坊威度电子科技有限公司 | Liquefied gas fuel liquid direct injection device and engine combination valve |
-
2012
- 2012-06-19 CN CN2012102048256A patent/CN102733995A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781014Y (en) * | 2004-08-27 | 2006-05-17 | 上海大众汽车有限公司 | Vehicle liquified petroleum gas injection system for two-fuel supply system |
| JP2007247639A (en) * | 2006-03-16 | 2007-09-27 | Hyundai Motor Co Ltd | Lpi gas injector system, fuel leakage preventive method using the same, and starting failure preventive method |
| CN1869426A (en) * | 2006-06-26 | 2006-11-29 | 陆斌 | Supply method and device for gas fuel of gas engine |
| CN101545418A (en) * | 2009-05-07 | 2009-09-30 | 哈尔滨工程大学 | Gas jet device of electric control jet lean-burn natural gas engine and jet control method |
| CN202140199U (en) * | 2011-05-16 | 2012-02-08 | 胜利油田胜利动力机械集团有限公司 | Air intake valve type fuel gas supplying mechanism |
| CN202611929U (en) * | 2012-06-19 | 2012-12-19 | 潍坊威度电子科技有限公司 | Liquefied gas fuel liquid direct injection device and engine combination valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114263549A (en) * | 2021-12-08 | 2022-04-01 | 北京工业大学 | Gas cylinder internal direct injection engine based on valve mechanism and control method thereof |
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Application publication date: 20121017 |