CN108488019A - A kind of Double sparking plug synchronous ignition method based on optimization lean burn - Google Patents
A kind of Double sparking plug synchronous ignition method based on optimization lean burn Download PDFInfo
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- CN108488019A CN108488019A CN201810225867.5A CN201810225867A CN108488019A CN 108488019 A CN108488019 A CN 108488019A CN 201810225867 A CN201810225867 A CN 201810225867A CN 108488019 A CN108488019 A CN 108488019A
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- Prior art keywords
- ignition
- plug
- spark plug
- engine
- optimization
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/02—Arrangements having two or more sparking plugs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Electrical Control Of Ignition Timing (AREA)
Abstract
The invention discloses a kind of Double sparking plug synchronous ignition methods based on optimization lean burn, including engine body, the engine body includes at least one set of cylinder cover, two inlet valves and two exhaust valves are housed on the cylinder cover, it is equipped with main spark plug at the top of cylinder cover, a secondary spark plug is additionally provided between two exhaust valves；The asynchronous ignition method includes the following steps：1）Before piston reaches top dead centre, the gasoline engine ignition moment than theoretical mixture ratio 1 postpones 3 ~ 7 °, controls main spark plug and lights a fire first；2）When piston reaches top dead centre, secondary plug ignition is controlled.The present invention can avoid detonating combustion by Double sparking plug synchronous igniting, keep engine job stability more preferable, the service life is longer；Burning can be made more abundant simultaneously, compression negative work and discharged nitrous oxides be reduced, and expansion work can effectively act on piston, to make engine efficiency and power significantly improve.
Description
Technical field
The present invention relates to technical field of engines more particularly to a kind of Double sparking plug synchronous points based on optimization lean burn
Ignition method.
Background technology
The single spark-plug ignition of homogeneous lean mixture is burnt, and mainly faces the slow problem of burning velocity, engine is caused to be imitated
Rate and power reduce.It solves the problems, such as that the generally use increases the method for ignition advance angle, makes burning maximum pressure after top dead centre
10 degree or so（The value is the empirical value of best combustion）, consequently it is then easy to happen detonating combustion, the pressure before top dead centre
Also it increases, negative work is caused to increase, while burning maximum pressure and maximum temperature also rises, then led for lean burn
Nitrogen oxides noxious emission is caused to increase.
Market also has a small amount of engine using dual ignition plug while the scheme of igniting, can greatly speed up burn rate,
Do not declined with protecting engine power.But it is such then be easier to cause the upper of the rising of maximum pressure and temperature and the rate of pressure rise
It rises, so that thermic load, mechanical load, impact and the vibrations of engine is increased, discharged nitrous oxides increase；It can be with if postponing igniting
It solves the above problems, but most of fuel will cause to expand insufficient and make engine efficiency in the after-combustion far from top dead centre
It is unable to reach optimum value with power.
Invention content
For deficiencies of the prior art, it is an object of the invention to solve available engine to be also easy to produce pinking,
Burn it is insufficient cause discharged nitrous oxides to increase, and expansion is insufficient and cause what engine efficiency and power declined to ask
Topic provides a kind of Double sparking plug synchronous ignition method based on optimization lean burn, can be kept away by Double sparking plug synchronous igniting
Exempt from detonating combustion, keeps engine job stability more preferable, the service life is longer；Burning can be made more abundant simultaneously, reduce pressure
Contracting negative work and discharged nitrous oxides, and expansion work can effectively act on piston, to make engine efficiency and power
It significantly improves.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is such：One kind is based on the thin combustion of optimization
The Double sparking plug synchronous ignition method of burning, including engine body, the engine body includes at least one set of cylinder cover, described
On cylinder cover be equipped with two inlet valves and two exhaust valves, the top of cylinder cover be equipped with main spark plug, the main spark plug be located at two into
The center of valve and two exhaust valves, it is characterised in that：A secondary spark plug is additionally provided between two exhaust valves；It is described asynchronous
Ignition method includes the following steps：
1）Before piston reaches top dead centre, the gasoline engine ignition moment than theoretical mixture ratio 1 postpones 3 ~ 7 °, and it is first to control main spark plug
First light a fire；
2）When piston reaches top dead centre, secondary plug ignition is controlled.
Further, the compression ratio of the engine body is more than 12.
Further, when accelerator open degree is when 85% or more, mixing ratio is 1.15 ~ 1.25, the main plug ignition moment is than reason
Think that the gasoline engine ignition moment of mixing ratio 1 postpones 3 ~ 4 °；
When mixing ratio be 1.05 ~ 1.15 when, the main plug ignition moment than theoretical mixture ratio 1 the gasoline engine ignition moment postpone 5 ~
7°；
When it is 1.15 ~ 1.25 that accelerator open degree, which is less than 85%, mixing ratio, gasoline of the main plug ignition moment than theoretical mixture ratio 1
Machine time of ignition postpones 3 ~ 4 °.
Compared with prior art, the invention has the advantages that：
1, main spark plug is first lighted a fire, and can control the rate of pressure rise of early stage and burn maximum pressure and temperature, work soft, energy
It enough reduces negative work and reduces discharged nitrous oxides.
2, secondary spark ignitor end gas, so that detonating combustion will not occur in cylinder and accelerate after burning speed
Rate is suitble to optimization lean burn, reduces HC and CO.
3, main spark plug and secondary spark plug are used cooperatively, and greatly reduce harmful row while so that lean burn is realized efficient
It puts.
4, burn rate can be greatly speeded up, to protect engine power, lean burn process is made more to tend to be perfect.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the effect contrast figure of the present invention and the prior art.
In figure：1-inlet valve, 2-exhaust valves, 3-main spark plugs, 4-secondary spark plugs.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment：Referring to Fig. 1, a kind of Double sparking plug synchronous ignition method based on optimization lean burn, including engine
Ontology.The engine body includes at least one set of cylinder cover, have on the cylinder cover two inlet valves 1, two exhaust valves 2 and
One piston is equipped with main spark plug 3 at the top of cylinder cover, which is located at the center of two inlet valves 1 and two exhaust valves 2
Position；A secondary spark plug 4 is additionally provided between two exhaust valves 2.
The asynchronous ignition method includes the following steps：
1）Before piston reaches top dead centre, the gasoline engine ignition moment than theoretical mixture ratio 1 postpones 3 ~ 7 °（Crank angle）, control
Main spark plug 3 is lighted a fire first.Specifically（Compared with the gasoline engine ignition moment of theoretical mixture ratio 1, thus do not consider rotating speed because
Element）：
When accelerator open degree is when 85% or more, mixing ratio is 1.15 ~ 1.25,3 time of ignition of main spark plug is than theoretical mixture ratio 1
The gasoline engine ignition moment postpones 3 ~ 4 °；（The ignition advance angle of theoretical mixture ratio is originally just little at this time, and quasi- lean burn is mixed
It is diluter to close gas, so retardation should not be too large）.
When mixing ratio is 1.05 ~ 1.15, gasoline engine ignition moment of 3 time of ignition of main spark plug than theoretical mixture ratio 1
Postpone 5 ~ 7 °；
When it is 1.15 ~ 1.25 that accelerator open degree, which is less than 85%, mixing ratio, vapour of 3 time of ignition of main spark plug than theoretical mixture ratio 1
Oil machine time of ignition postpones 3 ~ 4 °；（Theoretical mixture ratio ignition advance angle is very big at this time, but more due to the gaseous mixture of quasi- lean burn
It is dilute, so igniting postponement is unsuitable too many）.
2）When piston reaches top dead centre, controls secondary spark plug 4 and light a fire.
Currently, existing engine be all compared with low compression ratio, using theoretical mixture ratio 1, single plug ignition, it is same to turn
The lower accelerator open degree of speed increases then ignition advance angle and reduces, because big load burn rate is fast, and lean out then ignition advance angle
Increase, increase because be easy to causeing after-burning when dilute mixing ratio, advanced ignition can reduce after-burning but compression negative work is then caused to increase, most
All it is eventually that the thermal efficiency is made to decline.But there are two burning things which may cause a fire disaster for present invention tool, no matter can be by reducing main fire using which kind of gaseous mixture
Flower 3 time of ignition of plug reduce compression negative work and control maximum combustion temperature and pressure, to also inhibit pernicious gas nitrogen oxidation
The generation of object has sufficient oxygen when using lean mixture, then putting object HC and CO reduces, and is coordinated by secondary spark plug 4, completely can be with
The after-burning that after burning rate reduces fuel is improved, so reducing discharge while the thermal efficiency is improved.
Specifically, the present invention is lighted a fire using Double sparking plug synchronous, is lighted a fire first with " the main spark plug 3 " at combustion chamber center,
The rate of pressure rise of early stage can be controlled and burn maximum pressure and temperature, be then arranged two when piston reaches top dead centre or so
" secondary spark plug 4 " igniting between exhaust valve 2, so then on the one hand quickly having lighted end gas, so that engine is not occurred quick-fried
Shake burning, on the other hand since igniting has certain time lag of inflammation, then burn maximum pressure still controllable After Top Center 10
Degree left and right, and negative work of burning does not increase.Then due to being promoted while flame at two, after burning is made to greatly speed up, to
Most of fuel is realized close to atdc combustion, since its expansion fully obtains the higher thermal efficiency.Piston is in down at this time
Row acceleration is then closer to " isobaric procedure ", engine torque is carried so in-cylinder pressure will not be increased drastically
It rises.
Referring to Fig. 2, main spark plug 3 is arranged in combustion chamber center, it is main between secondary spark plug 4 is arranged in two exhaust valves 2
The igniting of spark plug 3 postpones 3 ~ 7 degree than single spark plug.Double sparking plug synchronous is lighted a fire before the top dead centre that secondary spark plug 4 is not yet lighted a fire
Period pressure rise is slower, and to reduce negative work area, when crank angle is in top dead centre, pair spark plug 4 is lighted a fire, then piston
It crosses heat release after top dead centre and accelerates the rate of pressure rise and increase, but when maximum pressure rate of rise is unlike single spark plug premature firing is big,
And maximum pressure and temperature will not be excessively high, since late combustion due to promoting simultaneously there are two burning things which may cause a fire disaster, so descent of piston adds
Pressure will not continue to increase during speed, and combustion heat release will not be too far away from top dead centre, to obtain the positive work of bigger.
Finally, it should be noted that technical side the above examples are only used to illustrate the technical scheme of the present invention and are not limiting
Case, it will be understood by those of ordinary skill in the art that, those are modified or replaced equivalently technical scheme of the present invention, and
The objective and range for not departing from the technical program, are intended to be within the scope of the claims of the invention.
Claims (3)
1. a kind of Double sparking plug synchronous ignition method based on optimization lean burn, including engine body, the engine sheet
Body includes at least one set of cylinder cover, and two inlet valves and two exhaust valves are housed on the cylinder cover, and master is equipped at the top of cylinder cover
Spark plug, the main spark plug are located at the center of two inlet valves and two exhaust valves, it is characterised in that：Between two exhaust valves
It is additionally provided with a secondary spark plug；The asynchronous ignition method includes the following steps：
1）Before piston reaches top dead centre, the gasoline engine ignition moment than theoretical mixture ratio 1 postpones 3 ~ 7 °, and it is first to control main spark plug
First light a fire；
2）When piston reaches top dead centre, secondary plug ignition is controlled.
2. a kind of Double sparking plug synchronous ignition method based on optimization lean burn according to claim 1, feature exist
In：The compression ratio of the engine body is more than 12.
3. a kind of Double sparking plug synchronous ignition method based on optimization lean burn according to claim 1, feature exist
In：
When accelerator open degree 85% or more, mixing ratio be 1.15 ~ 1.25 when, vapour of the main plug ignition moment than theoretical mixture ratio 1
Oil machine time of ignition postpones 3 ~ 4 °；
When mixing ratio be 1.05 ~ 1.15 when, the main plug ignition moment than theoretical mixture ratio 1 the gasoline engine ignition moment postpone 5 ~
7°；
When it is 1.15 ~ 1.25 that accelerator open degree, which is less than 85%, mixing ratio, gasoline of the main plug ignition moment than theoretical mixture ratio 1
Machine time of ignition postpones 3 ~ 4 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810225867.5A CN108488019B (en) | 2018-03-19 | 2018-03-19 | Double-spark-plug asynchronous ignition method based on optimized lean combustion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225867.5A CN108488019B (en) | 2018-03-19 | 2018-03-19 | Double-spark-plug asynchronous ignition method based on optimized lean combustion |
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| CN108488019A true CN108488019A (en) | 2018-09-04 |
| CN108488019B CN108488019B (en) | 2020-04-07 |
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Cited By (4)
| 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 |
| CN113153594A (en) * | 2021-02-07 | 2021-07-23 | 联合汽车电子有限公司 | Lean combustion system and method |
| CN116123007A (en) * | 2023-04-13 | 2023-05-16 | 潍柴动力股份有限公司 | Ignition control method for engine spark plug and vehicle |
| CN116292021A (en) * | 2023-05-16 | 2023-06-23 | 潍柴动力股份有限公司 | Ignition method and engine |
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| US20040163624A1 (en) * | 2003-02-26 | 2004-08-26 | Meyer Garth Michael | Synchronized cylinder event based spark |
| CN1837601A (en) * | 2006-04-07 | 2006-09-27 | 重庆宗申技术开发研究有限公司 | Asynchronous igniter for sparking plug of engine |
| JP2007046474A (en) * | 2005-08-05 | 2007-02-22 | Toyota Motor Corp | Internal combustion engine and operation controller of internal combustion engine |
| JP2007146781A (en) * | 2005-11-29 | 2007-06-14 | Toyota Motor Corp | Control device for internal combustion engine |
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2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040163624A1 (en) * | 2003-02-26 | 2004-08-26 | Meyer Garth Michael | Synchronized cylinder event based spark |
| JP2007046474A (en) * | 2005-08-05 | 2007-02-22 | Toyota Motor Corp | Internal combustion engine and operation controller of internal combustion engine |
| JP2007146781A (en) * | 2005-11-29 | 2007-06-14 | Toyota Motor Corp | Control device for internal combustion engine |
| CN1837601A (en) * | 2006-04-07 | 2006-09-27 | 重庆宗申技术开发研究有限公司 | Asynchronous igniter for sparking plug of engine |
Cited By (6)
| 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 |
| CN113153594A (en) * | 2021-02-07 | 2021-07-23 | 联合汽车电子有限公司 | Lean combustion system and method |
| CN116123007A (en) * | 2023-04-13 | 2023-05-16 | 潍柴动力股份有限公司 | Ignition control method for engine spark plug and vehicle |
| CN116123007B (en) * | 2023-04-13 | 2023-07-18 | 潍柴动力股份有限公司 | Ignition control method for engine spark plug and vehicle |
| CN116292021A (en) * | 2023-05-16 | 2023-06-23 | 潍柴动力股份有限公司 | Ignition method and engine |
| CN116292021B (en) * | 2023-05-16 | 2023-08-18 | 潍柴动力股份有限公司 | Ignition method and engine |
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| Publication number | Publication date |
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| CN108488019B (en) | 2020-04-07 |
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