CN102787908B - For mixing method and the device of steam of heating up water in natural gas engine - Google Patents
For mixing method and the device of steam of heating up water in natural gas engine Download PDFInfo
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- CN102787908B CN102787908B CN201210258251.0A CN201210258251A CN102787908B CN 102787908 B CN102787908 B CN 102787908B CN 201210258251 A CN201210258251 A CN 201210258251A CN 102787908 B CN102787908 B CN 102787908B
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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
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention discloses and a kind of the method that water vapor mixes burning is carried out to motor, comprise step water being converted into high-temperature steam and step high-temperature steam being sprayed into natural gas engine suction tude or intake duct.The invention also discloses the mingled burning installation in a kind of natural gas engine, comprising: water vapor case, is communicated with water intake by intake pipe, water is flowed into wherein by this intake pipe; Water vapor injection apparatus, is arranged on the admission line tube wall of motor, for spraying into water vapor to admission line; Water vapor case is arranged on engine exhaust pipe, and outlet pipe is inner through it, and the cooling water in case is heated to be high-temperature steam through outlet pipe, and enters water vapor injection apparatus by an outlet conduit, and then sprays into admission line.Method and apparatus of the present invention sprays in engine air inlet tube after the cooling water of motor is heated to be steam, thus Optimizing Combustion speed and combustion temperature, improve natural gas engine Economy, improve emission performance.
Description
Technical field
The present invention relates to natural gas engine technical field, specifically a kind of apparatus and method of mixing heat up water steam or aqueous solution steam for natural gas engine.
Background technique
Along with increasing rapidly of China's automobile pollution, growing to the demand of automotive fuel (mainly gasoline and diesel oil), China's oil import volume is increased year by year.At present, petroleum import amount is considerably beyond output in domestic, and the external dependence degree of oil raises year by year, and expecting the year two thousand twenty will reach more than 70%.In order to ensure Chinese energy safety, need to change current energy consumption structure.China has abundant natural gas resource, and the gross reserves of conventional gas, about 38 tcms, accounts for greatly 11% of world resource total amount.Throughput at present about the Sichuan Basin, central and west regions and sea define Annual output 800 billion cubic meter, development natural gas engine has important realistic meaning for alleviation China Pressure on Energy.
Compare with gasoline with diesel oil, rock gas is gaseous fuel, mix with air evenly, greatly can reduce the discharge of the noxious emission such as CO, HC and particulate matter.Further, CH
4hydrogen content in (rock gas main component) molecule is high, discharges same energy, the greenhouse gases CO of natural gas fuel
2discharge amount fewer than gasoline more than 30%, therefore, development natural gas engine also has important realistic meaning for improving urban air-quality.
But natural gas engine still also exists two technical barriers: 1. combustion of natural gas speed is slow, makes CH
4have little time perfect combustion, CH
4discharge high; 2. natural gas engine combustion temperature is high, NO
xdischarge relatively high.Only from the design of optimization natural gas engine body structure, this two problems cannot be solved.
Summary of the invention
The object of the present invention is to provide a kind of method for mixing steam of heating up water in natural gas engine, spray in engine air inlet tube (road) after realizing that the cooling water of motor is heated to be steam, thus Optimizing Combustion speed and combustion temperature, improve natural gas engine Economy, improve emission performance.
Realizing the concrete scheme that object of the present invention adopts is:
A kind of realization carries out the method that water vapor mixes burning in natural gas engine, it is characterized in that, comprise the step cooling water in natural gas engine cooling system being converted into high-temperature steam and the step described high-temperature steam being sprayed into described natural gas engine suction tude or intake duct.
As improvement of the present invention, described cooling water is heated to be high-temperature steam by the outlet pipe of described natural gas engine.
As improvement of the present invention, the steam flow and the discharge time that spray into described natural gas engine suction tude or intake duct are controlled by ECU according to engine start machine load condition.
Another object of the present invention is to provide a kind of for the mingled burning installation in natural gas engine, and mix for realizing steam of heating up water, it comprises:
Water vapor case, it is communicated with the cooling system of motor by intake pipe, and cooling water is flowed into wherein by this intake pipe;
Water vapor injection apparatus, it is arranged on the admission line tube wall of described motor, for spraying into water vapor to described admission line, to realize mixing burning;
It is characterized in that, described water vapor case is arranged on engine exhaust pipe, and this outlet pipe is inner through it, and the cooling water in case is heated to be high-temperature steam through this outlet pipe, and enters described water vapor injection apparatus by outlet conduit, and then sprays into admission line.
As improvement of the present invention, described in spray into admission line steam flow controlled by the pressure reduction between this water vapor case and suction tude.
As improvement of the present invention, described water vapor case and admission line are equipped with pressure transducer, and two sensors signal is input in ECU, and described ECU controls the opening and closing of water vapor injection apparatus by the pressure reduction that two sensors is responded to.
As improvement of the present invention, water vapor case is provided with venting valve, pressure too high in water vapor case is by the release of venting valve.
As improvement of the present invention, the keying of described venting valve is controlled by described ECU.
As improvement of the present invention, described intake pipe is provided with one-way valve.
After water enters into miniature water steam chest by one-way cock, water vapor can be formed by hot outlet pipe rapid heating.The high-pressure water vapor formed, is ejected in air inlet piping by water vapor injection apparatus, then fully mixes with rock gas, air, enter cylinder and participate in combustion reaction.The water vapor quality be ejected in air inlet piping can be controlled by the pressure reduction of miniature water steam chest pressure and suction tude internal pressure, suction tude internal pressure is controlled by engine load, do not control by apparatus of the present invention, so need to control miniature water steam chest internal pressure.The pressure of miniature water steam chest is controlled by venting valve, when the pressure reduction of miniature water steam chest and air inlet piping is greater than desired value, open the pressure release of miniature water steam chest venting valve, and closing one-way valve door stops to water filling in miniature water steam chest.
The present invention is not limited to natural gas engine, is also applicable to liquified petroleum gas engine, coal-seam gas, methane fuelled engine.
Water needed for water vapor of the present invention from the cooling system of motor or car load, can in water pump rear end, the local water intaking such as cylinder cap water outlet, radiator.
Miniature water steam chest of the present invention is arranged in vent systems, and its shape, position and size can be arranged according to vent systems and be determined.
Beneficial effect of the present invention shows as:
By said apparatus to water-spraying steam in admission line, natural gas engine can be realized and mix steam of heating up water online.The advantage applies of this device and method exists:
1, water vapor is under cylinder hot environment, can dissociate into H base and OH base.H base, the appearance of OH base can accelerate rock gas main component CH greatly
4the speed of burning.Motor can be made within the strong deflagration phase to send more heats, the degree of constant volume of motor is improved, thus the thermal efficiency of motor also can improve;
2, due to the raising of rate of burning, can burn in same time more CH
4, make combustion of natural gas in cylinder more fully, CH can not fired
4discharge amount declines;
3, specific heat of water is larger, and the mixture burning rock gas and water vapor in cylinder combustion can make the maximum temperature in cylinder reduce, thus makes NO
xdischarge declines.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram that steam of heating up water mixed online by natural gas engine.
In figure: 1, one-way cock 2, miniature water steam chest 3, outlet pipe 4, venting valve 5, tank pressure sensor 6, water vapor injection apparatus 7, intake manifold pressure sensor 8, air inlet piping.
Embodiment
In further detail the present invention is described below by the drawings and specific embodiments, but following examples are only illustrative, protection scope of the present invention is not by the restriction of these embodiments.
Fig. 1 is the apparatus structure schematic diagram that steam of heating up water mixed online by natural gas engine, illustrates implementation methods according to accompanying drawing.
Draw a pipeline from engine-cooling system, pipeline be provided with an one-way cock 1, water after one-way cock in miniature water steam chest 2.Water in miniature water steam chest 2, under the high-temperature wall surface heating of engine exhaust pipe 3, forms high-pressure water vapor.One-way cock 1 can guarantee that the water in miniature water steam chest 2 is being subject to thermal evaporation, and pressure can not flow backwards after raising and get back in engine-cooling system.The wall of miniature water steam chest 2 is equipped with a venting valve 4, a pressure transducer 5 and a supply air line outlet, venting valve 4 is controlled by ECU, the signal of pressure transducer 5 is input in ECU, should water outlet be avoided when bleed valve and the design of supply air line export structure, therefore structure be designed to cascade export structure.High-pressure water vapor in miniature water steam chest 2 is connected to water vapor injection apparatus 6 by pipeline, be ejected in suction tude (road) 8 afterwards, the wall in suction tude (road) has a pressure transducer 7, and the signal of pressure transducer is input in ECU.Pressure in suction tude (road) is controlled by engine load operating mode, changes along with engine operating condition change.In order to control the water vapor quality entering cylinder under different operating mode, just need the injection duration controlling miniature water steam chest 2 internal pressure and water vapor injection apparatus 6, the control of the injection duration of miniature water steam chest 2 internal pressure and water vapor injection apparatus 6 is decided according to engine operating condition by ECU.
If the pressure in miniature water steam chest 2 is P
0, the pressure in intake duct is P
1, pressure difference value Δ P=P
0-P
1, the diameter of water vapor jetburner is d, and the Bernoulli's equation according to viscous flow is known:
Be ejected into the flow in suction tude (road):
Known by above formula, as long as can control P
0just can control the injection flow q of water vapor
m, then the switching time of water vapor injection apparatus 6 is controlled by ECU, namely control the injection duration of water vapor injection apparatus 6, just can control to be ejected into the water vapor quality in suction tude (road).
Water needed for water vapor carrys out the cooling system of white hair motivation or car load, can in water pump rear end, the local water intaking such as cylinder cap water outlet, radiator.
The motor of the present embodiment is not limited to natural gas engine, is also applicable to liquified petroleum gas engine, coal-seam gas, methane fuelled engine etc.
Miniature water steam chest in the present embodiment is arranged in vent systems, and its shape, position and size can be arranged according to vent systems and be determined.
Claims (6)
1. carry out to natural gas engine the method that water vapor mixes burning, it is characterized in that, the method comprises step water being converted into high-temperature steam and the step described high-temperature steam being sprayed into described natural gas engine suction tude or intake duct;
Wherein, described water is heated by described waste pipe and is converted into high-temperature steam, and in the step spraying into described natural gas engine suction tude or intake duct at described high-temperature steam, the steam flow and the discharge time that spray into described engine air inlet tube or intake duct are controlled by ECU according to engine load operating mode, described high-temperature steam is under cylinder hot environment, dissociate into H base and OH base, accelerate CH in rock gas
4the speed of burning, thus the more CH that can burn in same time
4, make combustion of natural gas in cylinder more fully, CH can not fired
4discharge amount declines; And, by the mixture burning rock gas and water vapor in cylinder combustion, the maximum temperature in cylinder is reduced, thus make NO
xdischarge declines.
2. according to claim 1 the method that water vapor mixes burning is carried out to natural gas engine, it is characterized in that, described in be converted into steam water come from the water pump rear end of natural gas engine, cylinder cap water outlet and/or radiator.
3., for the mingled burning installation in natural gas engine, to realize mixing steam of heating up water within the engine, it comprises:
Water vapor case (2), it is communicated with water intake by intake pipe, and water is flowed into wherein by this intake pipe;
Water vapor injection apparatus (6), it is arranged on admission line (8) tube wall of described motor, for spraying into water vapor to described admission line (8), to realize mixing burning;
It is characterized in that, described water vapor case (2) is arranged on engine exhaust pipe (3), this outlet pipe (3) is through its inside, water in case is heated to be high-temperature steam through this outlet pipe (3), and enter described water vapor injection apparatus (6) by an outlet conduit, and then spray into admission line (8), described high-temperature steam is under cylinder hot environment, dissociate into H base and OH base, accelerate CH in rock gas
4the speed of burning, thus the more CH that can burn in same time
4, make combustion of natural gas in cylinder more fully, CH can not fired
4discharge amount declines; And, by the mixture burning rock gas and water vapor in cylinder combustion, the maximum temperature in cylinder is reduced, thus make NO
xdischarge declines;
Wherein, the described steam flow spraying into admission line (8) is controlled by the pressure reduction between this water vapor case (2) and admission line (8), namely described water vapor case (2) and admission line (8) are equipped with pressure transducer, two sensors signal is input in ECU, described ECU controls the opening and closing of water vapor injection apparatus (6) by the pressure reduction that two sensors is responded to, and realizes the control to the steam flow spraying into admission line (8).
4. according to claim 3 a kind of for the mingled burning installation in natural gas engine, it is characterized in that, described water vapor case (2) is provided with venting valve (4), pressure too high in water vapor case (2) is by venting valve (4) release.
5. according to claim 4ly a kind ofly to it is characterized in that for the mingled burning installation in natural gas engine, the keying of described venting valve (4) is controlled by ECU.
6. a kind of for the mingled burning installation in natural gas engine according to any one of claim 3-5, it is characterized in that, the water entering described water vapor case (2) comes from the water pump rear end of the motor be communicated with described water intake, cylinder cap water outlet and/or radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210258251.0A CN102787908B (en) | 2012-07-24 | 2012-07-24 | For mixing method and the device of steam of heating up water in natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210258251.0A CN102787908B (en) | 2012-07-24 | 2012-07-24 | For mixing method and the device of steam of heating up water in natural gas engine |
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| CN102787908A CN102787908A (en) | 2012-11-21 |
| CN102787908B true CN102787908B (en) | 2016-01-20 |
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| CN201210258251.0A Active CN102787908B (en) | 2012-07-24 | 2012-07-24 | For mixing method and the device of steam of heating up water in natural gas engine |
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| CN109139198B (en) * | 2018-08-09 | 2020-09-08 | 襄阳美标朗源动力实业有限公司 | Water-cooling exhaust pipe of non-vehicular natural gas engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2509335Y (en) * | 2001-10-07 | 2002-09-04 | 于洪水 | Internal combustion engine steam booster |
| CN1461377A (en) * | 2001-04-06 | 2003-12-10 | 三菱重工业株式会社 | Method of operating internal combustion engine injected with critical water |
| CN101187345A (en) * | 2007-10-24 | 2008-05-28 | 吕传义 | Internal combustion engine oil-saving discharging-reducing method and environment-friendly oil economizer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070022977A1 (en) * | 2005-07-27 | 2007-02-01 | Crower H B | Method and apparatus for operating an internal combustion engine |
| JP4887836B2 (en) * | 2006-03-01 | 2012-02-29 | 日産自動車株式会社 | Internal combustion engine |
| US8291872B2 (en) * | 2009-06-12 | 2012-10-23 | Ut-Battelle, Llc | Highly efficient 6-stroke engine cycle with water injection |
| JP2011153598A (en) * | 2010-01-28 | 2011-08-11 | Toyota Motor Corp | Working gas circulation type engine |
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2012
- 2012-07-24 CN CN201210258251.0A patent/CN102787908B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461377A (en) * | 2001-04-06 | 2003-12-10 | 三菱重工业株式会社 | Method of operating internal combustion engine injected with critical water |
| CN2509335Y (en) * | 2001-10-07 | 2002-09-04 | 于洪水 | Internal combustion engine steam booster |
| CN101187345A (en) * | 2007-10-24 | 2008-05-28 | 吕传义 | Internal combustion engine oil-saving discharging-reducing method and environment-friendly oil economizer |
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| CN102787908A (en) | 2012-11-21 |
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