CN109630336A - Ignition system and vehicle for methanol engine - Google Patents
Ignition system and vehicle for methanol engine Download PDFInfo
- Publication number
- CN109630336A CN109630336A CN201910060525.7A CN201910060525A CN109630336A CN 109630336 A CN109630336 A CN 109630336A CN 201910060525 A CN201910060525 A CN 201910060525A CN 109630336 A CN109630336 A CN 109630336A
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- China
- Prior art keywords
- chamber
- precombustion chamber
- methanol
- main
- precombustion
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/04—Fuel-injectors combined or associated with other devices the devices being combustion-air intake or exhaust valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/06—Fuel-injectors combined or associated with other devices the devices being sparking plugs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The present invention provides a kind of ignition systems and vehicle for methanol engine, are related to methanol engine field.Ignition system includes main chamber and precombustion chamber.Inlet valve is arranged inside in main chamber, and the inlet valve is connected with main fuel spray nozzle, for lean mixture of the injection with the first preset concentration into the main chamber.Precombustion chamber is connected by precombustion chamber nozzle with the main chamber, and sparking-plug electrode and pre- atomizer spout are provided in the precombustion chamber.Spark plug is arranged in methanol precombustion chamber, since rich mixture concentration is higher, the minimum ignition energy of spark plug is required to reduce, by the dense methanol gaseous mixture for lighting precombustion chamber, the dense mixing methanol flame of burning is ejected into main chamber, the methanol Weak mixture of burning main chamber, fire ignition energy increase substantially.The system can reduce the thermic load of ignition temperature and engine, while reduce the NO of engineXDischarge and promoted engine the thermal efficiency.
Description
Technical field
The present invention relates to methanol engine fields, more particularly to a kind of ignition system and vehicle for methanol engine
?.
Background technique
With the diversification of the fuel of engine, new trend, clean energy resource hair are increasingly becoming using clean energy resource methanol
Motivation mostly uses greatly spark ignition type combustion system, and the important feature of spark ignition type is spark plug, directly lights gaseous mixture in the combustion chamber.
The ignition energy of spark plug directly affects the combustion process of methanol engine, dynamic property, economy to engine
Property, discharge and combustion noise have an important influence.
The commercial vehicle clean energy resource engine of existing market sale, is substantially and develops on diesel oil machine platform,
Using two valves or Four valve, spark plug is substantially the position for being mounted on original fuel injector.
Summary of the invention
It is existing to solve it is an object of the present invention to provide a kind of ignition system and vehicle for methanol engine
Methanol engine is less economical in technology, the thermal efficiency is low and emission aftertreatment requires the problems such as high.
On the one hand, the present invention provides a kind of ignition systems for methanol engine, comprising:
Inlet valve is arranged inside in main chamber, and the inlet valve is connected with main fuel spray nozzle, is used for the main burning
Indoor injection has the lean mixture of the first preset concentration；
Precombustion chamber is connected with the main chamber by precombustion chamber nozzle, is provided with fire in the precombustion chamber
Flower plug electrode and pre- atomizer spout；
Wherein, the lean mixture of the main chamber enters the precombustion chamber by the precombustion chamber nozzle, with institute
It states the fuel that pre- atomizer sprays and is mixed to form the rich mixture with the second preset concentration, the rich mixture is by the spark
The flame that generates passes through the precombustion chamber nozzle and ignites the indoor lean mixture of the main burning after plug electrode is lighted.
Optionally, the precombustion chamber is set to the one end of the main chamber far from piston.
Optionally, the pre- atomizer spout is configured in the part lean mixture in the piston towards the pre-burning
Methanol is sprayed after being pressed into the precombustion chamber by the piston when burning the movement of room direction, it is indoor dilute mixed with the precombustion
It closes gas and is mixed to form the rich mixture.
Optionally, the volume of the precombustion chamber is the 1%-5% of the main combustion chamber volume.
Optionally, the precombustion chamber nozzle is configured to outwardly protrude to the main chamber, the precombustion chamber spray
At least one through-hole for the main chamber to be connected with the precombustion chamber is provided on mouth.
Optionally, the diameter of the through-hole is 0.2~0.3mm；
The quantity of the through-hole is 2-4.
Optionally, the distributive value of the pre- atomizer is the 3%-8% of the distributive value of the main fuel spray nozzle.
Optionally, the excess air coefficient of the lean mixture with first preset concentration is more than or equal to 1.6.
Optionally, the excess air coefficient of the rich mixture with second preset concentration is 0.8-1.1.
On the other hand, the present invention provides a kind of vehicle, the engine of the vehicle includes above-mentioned ignition system.
Ignition system for methanol engine of the invention, including main chamber and precombustion chamber.Main chamber is in it
It is provided with inlet valve, the inlet valve is connected with main fuel spray nozzle, has first to preset for spraying into the main chamber
The lean mixture of concentration.Precombustion chamber is connected by precombustion chamber nozzle with the main chamber, is set in the precombustion chamber
It is equipped with sparking-plug electrode and pre- atomizer spout.Spark plug is arranged in methanol precombustion chamber, since rich mixture concentration is higher,
The minimum ignition energy of spark plug is required to reduce, by lighting the dense methanol gaseous mixture of precombustion chamber, the dense mixing first of burning
Alcohol flame is ejected into main chamber, and the methanol Weak mixture for the main chamber that burns, fire ignition energy increases substantially.Further
Since the ignition energy of main chamber increases substantially the flameholding of the methanol gaseous mixture of main chamber is continuously improved, together in ground
When increase substantially the excess air coefficient of methanol and air, realize ultra lean burn, reduce ignition temperature, reduce engine
Thermic load reduces the NO of engineXDischarge and promoted engine the thermal efficiency.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic diagram of the ignition system according to an embodiment of the invention for methanol engine；
Fig. 2 is the schematic diagram of the precombustion chamber of ignition system shown in Fig. 1；
Fig. 3 is the relational graph between spark plug minimum ignition energy and excess air coefficient；
Fig. 4 is the schematic diagram of methanol engine combustion characteristics.
Specific embodiment
The ignition system of the embodiment of the present invention is described referring to Fig. 1 to Fig. 4, is indicated in the description of the embodiment of the present invention
Orientation or positional relationship word be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and
Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction
And operation, therefore be not considered as limiting the invention.
Fig. 1 is the schematic diagram of the ignition system according to an embodiment of the invention for methanol engine.Fig. 2
It is the schematic diagram of the precombustion chamber of ignition system shown in Fig. 1.As depicted in figs. 1 and 2, for the igniting of methanol engine
System includes main chamber 1 and precombustion chamber 2.Precombustion chamber 2 is mainly responsible for the burning capacity tissue of ignition phase, in gas
Body is usually equivalent or enriching methanol gaseous mixture.Main chamber 1 is responsible for combustion phases, is inside thin methanol gaseous mixture.
Inlet valve 11 and exhaust valve 12 are provided in main chamber 1, inlet valve 11 is connected with main fuel spray nozzle 13, for
Injection has the lean mixture of the first preset concentration in main chamber 1.Main fuel spray nozzle 13 is arranged in air inlet pipe or cylinder cap air intake duct,
It is responsible for the methanol supply of main burning.Precombustion chamber 2 is connected by precombustion chamber nozzle 23 with main chamber 1.In precombustion chamber 2
It is provided with sparking-plug electrode 22 and pre- atomizer spout 21.Pre- atomizer 201 be responsible for the methanol oil mass of ignition phase injection and
Atomization.Sparking-plug electrode 22 is used to light the methanol gaseous mixture in precombustion chamber 2.The lean mixture of main chamber 1 passes through pre-burning
It burns room nozzle 23 and enters precombustion chamber 2, be mixed to form with the fuel that pre- atomizer 201 sprays dense mixed with the second preset concentration
Gas is closed, the flame that rich mixture generates after being lighted by sparking-plug electrode 22 passes through precombustion chamber nozzle 23 and ignites in main chamber 1
Lean mixture.
Ignition system in the present embodiment, sparking-plug electrode 22 are arranged in methanol precombustion chamber 2, due to precombustion chamber 2
Interior methanol mixture strength is higher, requires to reduce to the minimum ignition energy of spark plug 202, by lighting precombustion chamber 2
Dense methanol gaseous mixture, burned flame are ejected into main chamber 1, the methanol Weak mixture for the main chamber 1 that ignites, fire ignition energy
It increases substantially.
Further, since the ignition energy of main chamber 1 increases substantially, the methanol that main chamber 1 is continuously improved is mixed
Close the combustion stability of gas；Meanwhile increasing substantially with the excess air coefficient of methanol and air, to realize super thin combustion
It burns, reduce the thermic load of ignition temperature and engine and promotes the thermal efficiency of engine.
Further, in the ignition system of the present embodiment, sparking-plug electrode 22 is arranged in methanol precombustion chamber 2, igniting
The temperature in stage is much lower with respect to 1 ignition temperature of main chamber, is not washed away, can effectively mention by the gas of main burning high temperature
A possibility that service life of high spark plug 202, reduction ablation.
Further, since the excess air coefficient of methanol gaseous mixture in main chamber 1 is higher, it can be effectively reduced and start
The NO of machineXDischarge, reduce the requirement of tail-gas after treatment apparatus, reduce cost.
It is further carried out in example at one, precombustion chamber 2 is set to the one end of main chamber 1 far from piston 3.Precombustion
Room nozzle 23 is configured to outwardly protrude to main chamber 1, at least one is provided on precombustion chamber nozzle 23 for firing main
Burn the through-hole 231 that room 1 is connected with precombustion chamber 2.With reference to Fig. 2, precombustion chamber 2 is arranged on engine cylinder cover 4, wherein pre-
Combustion chamber burner 23 protrudes cylinder cap 4 baseplane 16mm, 36mm, 50mm, or any number in 16-50mm.Pre- oil spout
Mouth spout 21 is configured to be pressed into pre-burning by piston 3 towards when the movement of 2 direction of precombustion chamber in piston 3 in part lean mixture
Methanol is sprayed after burning room 2, is mixed to form rich mixture with the lean mixture in precombustion chamber 2.The diameter of through-hole 231 can be
0.2mm or 0.3mm can also be that any number between 0.2~0.3mm, the quantity of through-hole 231 are 2,3 or 4,
It is even to be distributed on precombustion chamber nozzle 23, it is possible to prevente effectively from combustion instability caused by flame travel is different shows
As, while extending combustion duration.
The working principle of ignition system in above-described embodiment are as follows:
In the suction stroke of engine, main fuel spray nozzle 13 sprays methanol, and thin methanol gaseous mixture is entered by inlet valve 11
Main chamber 1；The compression travel of engine, the Weak mixture of main chamber 1 are pressed into precombustion chamber 2；The point of engine
Fiery fire stroke: methanol pre-burning nozzle sprays a small amount of methanol, and Weak mixture is made to become dense methanol gaseous mixture, spark ignitor
The rich mixture of precombustion chamber, flame are sprayed from precombustion chamber nozzle 23, keep the thin methanol in main chamber 1 mixed as incendiary source
Close gas burning.
2 volume of precombustion chamber will affect engine performance, and 2 volume of precombustion chamber is small, and initiation combustion will be restricted,
NOXDischarge will reduce, and pinking is suppressed, if volume is too small, pre-burning ignition energy is insufficient, will be to the thermal effect of engine
Rate has an impact.So can reduce 2 volume of precombustion chamber under the premise of keeping enough pre-burning ignition energies.Precombustion chamber
2 volume can be 1%, 3% and the 5% of 1 volume of main chamber, can also be any number in 1%-5%.
With the development of technology, under the premise of saving cost, the methanol engine cylinder diameter in heavy goods vehicles is gradually increased, dilute
Combustion degree also steps up, at this point, the ignition ability of spark plug is unable to meet demand on former methanol engine, needs replacing into
This higher spark plug, so that the minimum ignition ability of spark plug is multiplied.And example is further carried out at one of the invention
In, the replacement increased spark plug of ignition ability is not needed, original spark plug is used.Fig. 3 is spark plug minimum ignition energy
Relational graph between amount and excess air coefficient.As shown in figure 3, abscissa represents excess air coefficient, ordinate represents spark
The minimum ignition energy of plug.3 curves in Fig. 3 respectively represent from left to right methane, ethane, propane (methane molecule formula CH4,
Methanol molecules formula CH3OH, the ignition energy of the two and the trend of air coefficient are identical), by curve it is found that methanol fuel is in excess
When air coefficient is 0.8 or so, ignition energy is minimum.In order to enable the engine to light, the mixture strength of combustion chamber cannot
Too dilute, otherwise spark plug point is not, it is preferable that the excess air coefficient of the rich mixture with the second preset concentration is 0.8-
1.1.In the range of guaranteeing that the excess air of rich mixture ties up to 0.8-1.1, the distributive value of pre- atomizer 201 should based on
The 3%-8% of the distributive value of atomizer 13.
Rich mixture in precombustion chamber 2 requires to reduce to the minimum ignition energy of spark plug, by lighting precombustion chamber
The dense mixing methanol flame of dense methanol gaseous mixture, burning is ejected into main chamber 1, the methanol lean mixture for the main chamber 1 that ignites
Gas, fire ignition energy increase substantially.Due to the raising of methanol precombustion-chamber ignition energy, to methanol gaseous mixture in main chamber 1
Mix situation, air current composition (tubulence energy) requires to reduce.
Fig. 4 is the schematic diagram of methanol engine combustion characteristics.As shown in figure 4, abscissa represents excess air coefficient, methanol
For fuel when excess air coefficient is more than or equal to 1.6, the thermal efficiency is higher and NOXDischarge amount is lower, far from knocking zone.Cause
This, it is preferable that the excess air coefficient of the lean mixture with the first preset concentration is more than or equal to 1.6.In the present embodiment, due to
The even concentration of lean mixture can avoid occurring catching fire phenomenon or phenomenon of detonation, to realize the super dilute of methanol-fueled engine
Thin burning reduces thermic load, the flameholding of engine component, improves the reliability of engine.
On the other hand, it the present invention also provides a kind of vehicle, is provided on the methanol engine of vehicle as in above-mentioned implementation
The ignition system reduces NO to improve the thermal efficiency of methanol engineXDischarge amount.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of ignition system for methanol engine characterized by comprising
Inlet valve is arranged inside in main chamber, and the inlet valve is connected with main fuel spray nozzle, for into the main chamber
Spray the lean mixture with the first preset concentration；
Precombustion chamber is connected with the main chamber by precombustion chamber nozzle, is provided with spark plug in the precombustion chamber
Electrode and pre- atomizer spout；
Wherein, the lean mixture of the main chamber enters the precombustion chamber by the precombustion chamber nozzle, and described pre-
The fuel that atomizer sprays is mixed to form the rich mixture with the second preset concentration, and the rich mixture is by the spark plug electricity
The flame that generates passes through the precombustion chamber nozzle and ignites the indoor lean mixture of the main burning after pole combustion.
2. ignition system according to claim 1, which is characterized in that
The precombustion chamber is set to the one end of the main chamber far from piston.
3. ignition system according to claim 2, which is characterized in that
The pre- atomizer spout is configured to square where the piston towards the precombustion chamber in the part lean mixture
To methanol is sprayed after being pressed into the precombustion chamber by the piston when movement, shape is mixed with the indoor lean mixture of the precombustion
At the rich mixture.
4. ignition system according to claim 1, which is characterized in that
The volume of the precombustion chamber is the 1%-5% of the main combustion chamber volume.
5. ignition system according to claim 1, which is characterized in that
The precombustion chamber nozzle is configured to outwardly protrude to the main chamber, be provided on the precombustion chamber nozzle to
A few through-hole for the main chamber to be connected with the precombustion chamber.
6. ignition system according to claim 5, which is characterized in that
The diameter of the through-hole is 0.2~0.3mm；
The quantity of the through-hole is 2-4.
7. ignition system according to claim 5, which is characterized in that
The distributive value of the pre- atomizer is the 3%-8% of the distributive value of the main fuel spray nozzle.
8. ignition system according to claim 1, which is characterized in that
The excess air coefficient of lean mixture with first preset concentration is more than or equal to 1.6.
9. ignition system according to claim 1, which is characterized in that
The excess air coefficient of rich mixture with second preset concentration is 0.8-1.1.
10. a kind of vehicle, which is characterized in that the engine of the vehicle includes point as claimed in any one of claims 1-9 wherein
Fiery system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910060525.7A CN109630336A (en) | 2019-01-22 | 2019-01-22 | Ignition system and vehicle for methanol engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910060525.7A CN109630336A (en) | 2019-01-22 | 2019-01-22 | Ignition system and vehicle for methanol engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109630336A true CN109630336A (en) | 2019-04-16 |
Family
ID=66063138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910060525.7A Pending CN109630336A (en) | 2019-01-22 | 2019-01-22 | Ignition system and vehicle for methanol engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109630336A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185534A (en) * | 2019-05-16 | 2019-08-30 | 天津大学 | A kind of spark assisted jet igniter motor |
| CN111351423A (en) * | 2020-03-19 | 2020-06-30 | 郑州陆根智能技术有限公司 | Flange connecting bolt looseness monitoring method |
| CN116951434A (en) * | 2023-07-28 | 2023-10-27 | 广州超凌热力设备有限公司 | Acid-base waste gas treatment device and waste heat recycling device |
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|---|---|---|---|---|
| US5024193A (en) * | 1990-02-06 | 1991-06-18 | Caterpillar Inc. | Fuel combustion system, method, and nozzle member therefor |
| US5293851A (en) * | 1992-04-16 | 1994-03-15 | Cooper Industries, Inc. | Combustion system for gas engine other than dual fuel engine |
| US20120118263A1 (en) * | 2010-11-11 | 2012-05-17 | Cameron International Corporation | Positive displacement radical injection system |
| CN109113880A (en) * | 2018-08-16 | 2019-01-01 | 江苏大学 | A kind of burning tissues method and its application of methanol/alcohol hydrogen-fueled internal combustion engine |
| CN208347966U (en) * | 2018-06-11 | 2019-01-08 | 浙江吉利控股集团有限公司 | The double feed systems of methanol |
-
2019
- 2019-01-22 CN CN201910060525.7A patent/CN109630336A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5024193A (en) * | 1990-02-06 | 1991-06-18 | Caterpillar Inc. | Fuel combustion system, method, and nozzle member therefor |
| US5293851A (en) * | 1992-04-16 | 1994-03-15 | Cooper Industries, Inc. | Combustion system for gas engine other than dual fuel engine |
| US20120118263A1 (en) * | 2010-11-11 | 2012-05-17 | Cameron International Corporation | Positive displacement radical injection system |
| CN208347966U (en) * | 2018-06-11 | 2019-01-08 | 浙江吉利控股集团有限公司 | The double feed systems of methanol |
| CN109113880A (en) * | 2018-08-16 | 2019-01-01 | 江苏大学 | A kind of burning tissues method and its application of methanol/alcohol hydrogen-fueled internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185534A (en) * | 2019-05-16 | 2019-08-30 | 天津大学 | A kind of spark assisted jet igniter motor |
| CN111351423A (en) * | 2020-03-19 | 2020-06-30 | 郑州陆根智能技术有限公司 | Flange connecting bolt looseness monitoring method |
| CN116951434A (en) * | 2023-07-28 | 2023-10-27 | 广州超凌热力设备有限公司 | Acid-base waste gas treatment device and waste heat recycling device |
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Application publication date: 20190416 |