CN103573476A - Gas pilot injection device - Google Patents
Gas pilot injection device Download PDFInfo
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- CN103573476A CN103573476A CN201210261835.3A CN201210261835A CN103573476A CN 103573476 A CN103573476 A CN 103573476A CN 201210261835 A CN201210261835 A CN 201210261835A CN 103573476 A CN103573476 A CN 103573476A
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- gas
- combustion gas
- cylinder
- conveying assembly
- metering valve
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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 gas pilot injection device. The gas pilot injection device is used for inputting gas into an outside-cylinder combustor f a cylinder body of a gas engine and comprises at least one set of gas conveying assemblies, the air inlet position of every gas conveying assembly is provided with a gas metering valve, and the gas outlet position of the gas conveying assembly is provided with an injector air inlet connecting pipe; wherein the gas metering valve controls the flow of the gas entering the gas conveying assembly; the injector air inlet connecting pipe supplies gas to the outside-cylinder combustor. The gas pilot injection device can control the flow of the gas entering the outside-cylinder combustor to achieve the aim of adjusting the mixing ratio of the gas inside the outside-cylinder combustor to an optimum state.
Description
Technical field
The present invention relates to a kind of combustion gas pre-spray unit, particularly a kind of combustion gas pre-spray unit that can be used for cylinder gas engine.
Background technique
Gas engine needs first combustion gas to be mixed mutually with air before igniting.More common combustion gas and air hybrid mode are that combustion gas and air are passed into respectively in the cylinder of motor, use plug ignition after mixing again, and make fuel gas buring.After mixing in this cylinder, the mode of igniting has following shortcoming again:
1. because point of ignition is from the head of spark plug, the point of ignition starting is most smaller, and then relies on flame propagation to light layer by layer, and the detonation pressure after therefore lighting is higher, and combustion efficiency is bad, and the waste gas giving off is also not easy up to standard;
2. in order to reach fast or the object of evenly burning, increase and decrease along with engine power or discharge capacity, need larger ignition energy, that is to say need to be larger electric current or voltage light a fire, and electric current is larger, voltage is higher, just more easily reduce reliability and the working life of engine spark plug and spark coil.
In order to overcome above-mentioned defect, there is the outer mixed firing spray combustion technology of a kind of cylinder, its central principle is in the cylinder head of motor, to dig out a groove a small-sized spark plug is installed, coordinate again a miniature cylinder external burning chamber, combustion gas and air are passed in cylinder external burning chamber, with spark plug, combustion gas are lighted in cylinder external burning chamber, then flame is entered into the large-scale combustion chamber in cylinder from the ejection of cylinder external burning chamber, light mixed gas wherein, thereby realize rapid combustion.The outer mixed firing spray combustion technology of this cylinder can reduce the maximum outbreak pressure of gas engine, realizes lean combustion, thereby the power character of raising motor and economical also makes the waste gas of motor discharge easily up to standard.
But in miniature cylinder external burning chamber, the mixed proportion of combustion gas and air has a certain impact to combustion ignition still tool, if can regulate the mixed proportion of combustion gas and air to the optimum state, just can make the igniting of cylinder external burning chamber reach the optimum state, thereby make the maximum outbreak pressure in in-cylinder combustion chamber reach minimum.For realizing this object, need to occur that a kind of gas mixture ratio example of cylinder external burning chamber that can make reaches best technological means.
Summary of the invention
The present invention is in order to overcome above-mentioned defect of the prior art, and a kind of combustion gas pre-spray unit is provided, and it can control the flow that combustion gas enters cylinder external burning chamber, thereby reaches gas mixture ratio example in blending vat exterior combustion chamber to the object of the optimum state.
For achieving the above object, the invention provides following technological scheme:
A kind of combustion gas pre-spray unit, for inputting combustion gas to the cylinder external burning chamber of gas engine cylinder block, comprise at least a set of combustion gas conveying assembly, Inlet Position on this combustion gas conveying assembly is provided with a gas metering valve, the position of giving vent to anger on this combustion gas conveying assembly is provided with a sparger air inlet tube, wherein: described gas metering valve is controlled the flow that enters the combustion gas in described combustion gas conveying assembly; Described sparger air inlet tube is to cylinder external burning chamber air feed.
In technique scheme, between described gas metering valve and described sparger air inlet tube, be provided with a safety check, prevent that gas is back to described gas metering valve from cylinder external burning chamber.
In technique scheme, between described safety check and described sparger air inlet tube, be provided with a transit joint.
In technique scheme, described transit joint is one section of bend pipe.
In technique scheme, between described safety check and described gas metering valve, be provided with one section of connecting tube.
In technique scheme, the front end of described sparger is provided with a pointed nozzle, and the appearance of described pointed nozzle is smooth surface.
In technique scheme, described combustion gas conveying assembly is six covers, for six cylinder gas engine cylinder block, and a cylinder position in the corresponding six cylinder gas engine cylinder block of combustion gas conveying assembly described in every suit wherein.
Compared with prior art, the present invention has following beneficial effect:
1, gas metering valve can be controlled the air inflow of combustion gas, controls the output gas quantity of gas metering valve according to the ratio of the required combustion gas of the optimum igniting state of cylinder external burning chamber and air, just can make the igniting of cylinder external burning chamber reach the optimum state.
2, because the indoor gas of cylinder external burning has very high pressure when working, be easy to flow out along pipeline, set up a safety check and can prevent gas backflow, keep the indoor gas pressure of cylinder external burning, can also prevent that pointed nozzle is subject to the adverse effect of the high temperature and high pressure gas in cylinder.
3, with bend pipe, be used as connecting tube, can, easily by regulating bend angle and the trend of bend pipe to make a whole set of combustion gas pre-spray unit can adapt to the engine cylinder space of narrow complexity around, be convenient to installation and removal.
4, overlap combustion gas conveying assembly more and can combine an a whole set of combustion gas pre-spray unit of formation, for example, when motor is multi-cylinder (six cylinders), for example, with the respectively corresponding cylinder position of every suit combustion gas conveying assembly in many covers (six covers) combustion gas conveying assembly, just can realize the combustion gas pre-spray of each cylinder position and adjust and control, guarantee that the ignition of each cylinder position can both reach the optimum state.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the outer mixed firing spray combustion device of existing cylinder;
Fig. 2 is the structural representation of a set of combustion gas conveying assembly of embodiment one;
Fig. 3 is embodiment two structural representation.
Mark the following drawings mark thereon by reference to the accompanying drawings:
101-cylinder external burning chamber, 102-spark plug, 103-piston, 104-in-cylinder combustion chamber, 105-blast tube, 106-cylinder cap, 2-combustion gas conveying assembly, 201-sparger air inlet tube, 202-transit joint, 203-safety check, 204-connecting tube, 205-gas metering valve, 206-pointed nozzle.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
Fig. 1 is the schematic diagram of the outer mixed firing spray combustion device of existing cylinder, on the basis of the in-cylinder combustion chamber 104 of this technology on original piston 103, has set up miniature cylinder external burning chamber 101.Spark plug 102 and blast tube 105 on cylinder cap 106, have been set up.Combustion gas is transported in cylinder external burning chamber 101 by blast tube 105, then with spark plug 102, combustion gas is lighted and rear flame sprayed in in-cylinder combustion chamber 101, just can realize once igniting.Compared with the mode of lighting a fire again after combustion gas is mixed in cylinder, this technological means can realize lean combustion, reduces the igniting detonation pressure in in-cylinder combustion chamber 101.Fuel gas ejecting device of the present invention is that its concrete technology contents is specified in following embodiment in order to make the combustion gas in the cylinder external burning chamber 101 in the outer mixed firing technological means of this cylinder reach the optimum state and design when lighting a fire:
embodiment 1
A pre-spray unit, inputs combustion gas for the cylinder external burning chamber 101 to gas engine cylinder block, comprises a set of combustion gas conveying assembly 2.As shown in Figure 2, the Inlet Position on combustion gas conveying assembly 2 is provided with a gas metering valve 205, for controlling combustion gas, is admitted to the flow in cylinder external burning chamber 101.In the outlet port of gas metering valve 205, by one section of connecting tube 204, be connected to a safety check 203, to prevent that fuel gas return-flow is to gas metering valve 205.The outlet port of gas metering valve 205 is provided with one section of transit joint 202, and this transit joint 202 can be one section of bend pipe, for the gas circuit environment facies external with cylinder of delivery of fuel gas are coordinated, is easy for installation and removal.The outlet of transit joint 202 is provided with a sparger air inlet tube 201, for combustion gas is imported to cylinder external burning chamber 101 by blast tube 105.Because blast tube 105 is very thin, so the front end at transit joint 202 is provided with the pointed nozzle 206 that an appearance is smooth surface, utilize pointed nozzle 206 to push down tightly the import of blast tube 105, the sealing of smooth surface is relatively good, can prevent Leakage Gas.
During work, combustion gas is first passed into the entrance of gas metering valve 205, according to the required proportioning of optimum igniting state, adjusts the output gas flow of gas metering valve 205.From the combustion gas of gas metering valve 205 outputs, along the route of " connecting tube 204 → safety check 203 → transit joint 202 → sparger air inlet tube 201 → pointed nozzle, 206 → blast tube, 105 → cylinder external burning chamber 101 ", carry.Complete after combustion gas conveying, just can light a fire with spark plug 102.
Because gas metering valve 205 is the matured products that can buy from market, so, if need to realize to the delivery rate of combustion gas, supply with the controlled effects of many kinds of parameters such as pressure, only need to select accordingly corresponding product, can not affect the realization of the object of the invention.
Combustion gas conveying assembly 2 in embodiment 1 is corresponding is a cylinder position.Owing to using in practice, be more the gas engine of multi-cylinder position, so the present embodiment be take common six cylinder engine as example, the applicable cases of the present invention on the motor of multi-cylinder position be described.Other also can do corresponding application with reference to the situation of the present embodiment as motors such as twin-tub, four cylinders.
As shown in Figure 3, in order to adapt to the demand of six cylinder gas engines, on embodiment one basis, combustion gas pre-spray unit in the present embodiment comprises six cover combustion gas conveying assemblies 2, for six cylinder gas engine cylinder block, wherein a cylinder position in the corresponding six cylinder gas engine cylinder block of every suit combustion gas conveying assembly 2.Because the surrounding space of motor is little, thus the length of connecting tube 204 and transit joint 202 and curved course can adjust flexibly according to actual space so that installation and removal.
In Fig. 3, although six cover combustion gas conveying assemblies 2 are shared same gas source, but owing to being equipped with a gas metering valve 205 on every cover combustion gas conveying assembly 2, so it is separate respectively to overlap the combustion gas output of combustion gas conveying assembly 2, do not interfere with each other, so just can adjust neatly the combustion gas of each cylinder position and carry proportioning, thereby make each cylinder position all realize best fired state.
Disclosed is above only more excellent specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (7)
1. a combustion gas pre-spray unit, for inputting combustion gas to the cylinder external burning chamber of gas engine cylinder block, it is characterized in that, comprise at least a set of combustion gas conveying assembly, Inlet Position on this combustion gas conveying assembly is provided with a gas metering valve, the position of giving vent to anger on this combustion gas conveying assembly is provided with a sparger air inlet tube, wherein:
Described gas metering valve is controlled the flow that enters the combustion gas in described combustion gas conveying assembly;
Described sparger air inlet tube is to cylinder external burning chamber air feed.
2. combustion gas pre-spray unit according to claim 1, is characterized in that, between described gas metering valve and described sparger air inlet tube, is provided with a safety check, prevents that gas is back to described gas metering valve from cylinder external burning chamber.
3. combustion gas pre-spray unit according to claim 2, is characterized in that, between described safety check and described sparger air inlet tube, is provided with a transit joint.
4. combustion gas pre-spray unit according to claim 3, is characterized in that, described transit joint is one section of bend pipe.
5. combustion gas pre-spray unit according to claim 2, is characterized in that, between described safety check and described gas metering valve, is provided with one section of connecting tube.
6. combustion gas pre-spray unit according to claim 1, is characterized in that, the front end of described sparger is provided with a pointed nozzle, and the appearance of described pointed nozzle is smooth surface.
7. combustion gas pre-spray unit according to claim 1, is characterized in that, described combustion gas conveying assembly is six covers, for six cylinder gas engine cylinder block, and a cylinder position in the corresponding six cylinder gas engine cylinder block of combustion gas conveying assembly described in every suit wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261835.3A CN103573476A (en) | 2012-07-26 | 2012-07-26 | Gas pilot injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261835.3A CN103573476A (en) | 2012-07-26 | 2012-07-26 | Gas pilot injection device |
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| Publication Number | Publication Date |
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| CN103573476A true CN103573476A (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210261835.3A Pending CN103573476A (en) | 2012-07-26 | 2012-07-26 | Gas pilot injection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104044463A (en) * | 2014-06-04 | 2014-09-17 | 三一汽车制造有限公司 | Instrument device and engineering vehicle |
| CN106460731A (en) * | 2014-06-25 | 2017-02-22 | 易安迪机车公司 | Integrated gas nozzle check valve and engine using same |
Citations (9)
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|---|---|---|---|---|
| US1190071A (en) * | 1914-11-16 | 1916-07-04 | Waldo P Adams | Apparatus for projecting radiant energy. |
| CN2570482Y (en) * | 2002-09-29 | 2003-09-03 | 天津大学 | Natural gas engine pre-ignition chamber built-in type gas supply apparatus |
| JP2005171975A (en) * | 2003-12-15 | 2005-06-30 | Mitsubishi Heavy Ind Ltd | Combustion control method and combustion control device in gas engine |
| CN201187370Y (en) * | 2008-05-15 | 2009-01-28 | 南车资阳机车有限公司 | Gas supply apparatus of gas internal combustion engine precombustion chamber |
| WO2009078260A1 (en) * | 2007-12-14 | 2009-06-25 | Mitsubishi Heavy Industries, Ltd. | Micro-pilot injection type gas engine |
| JP2009236017A (en) * | 2008-03-27 | 2009-10-15 | Komatsu Ltd | Auxiliary chamber type gas engine |
| WO2010041478A1 (en) * | 2008-10-10 | 2010-04-15 | 三菱重工業株式会社 | Gas engine using low calorie gas fuel |
| JP2011149308A (en) * | 2010-01-20 | 2011-08-04 | Mitsubishi Heavy Ind Ltd | Auxiliary chamber gas supply device for gas engine |
| CN202832862U (en) * | 2012-07-26 | 2013-03-27 | 广西玉柴机器股份有限公司 | Pilot injection device for fuel gas |
-
2012
- 2012-07-26 CN CN201210261835.3A patent/CN103573476A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1190071A (en) * | 1914-11-16 | 1916-07-04 | Waldo P Adams | Apparatus for projecting radiant energy. |
| CN2570482Y (en) * | 2002-09-29 | 2003-09-03 | 天津大学 | Natural gas engine pre-ignition chamber built-in type gas supply apparatus |
| JP2005171975A (en) * | 2003-12-15 | 2005-06-30 | Mitsubishi Heavy Ind Ltd | Combustion control method and combustion control device in gas engine |
| WO2009078260A1 (en) * | 2007-12-14 | 2009-06-25 | Mitsubishi Heavy Industries, Ltd. | Micro-pilot injection type gas engine |
| JP2009236017A (en) * | 2008-03-27 | 2009-10-15 | Komatsu Ltd | Auxiliary chamber type gas engine |
| CN201187370Y (en) * | 2008-05-15 | 2009-01-28 | 南车资阳机车有限公司 | Gas supply apparatus of gas internal combustion engine precombustion chamber |
| WO2010041478A1 (en) * | 2008-10-10 | 2010-04-15 | 三菱重工業株式会社 | Gas engine using low calorie gas fuel |
| JP2011149308A (en) * | 2010-01-20 | 2011-08-04 | Mitsubishi Heavy Ind Ltd | Auxiliary chamber gas supply device for gas engine |
| CN202832862U (en) * | 2012-07-26 | 2013-03-27 | 广西玉柴机器股份有限公司 | Pilot injection device for fuel gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104044463A (en) * | 2014-06-04 | 2014-09-17 | 三一汽车制造有限公司 | Instrument device and engineering vehicle |
| CN106460731A (en) * | 2014-06-25 | 2017-02-22 | 易安迪机车公司 | Integrated gas nozzle check valve and engine using same |
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Application publication date: 20140212 |